Adjustable Pruning Device for Automatic Cutting of Tree Branches of Various Sizes and Method Thereof

Abstract

ABSTRACT: Title: Adjustable Pruning Device for Automatic Cutting of Tree Branches of Various Sizes and Method Thereof The present disclosure proposes an adjustable pruning device (100) that allows users to customize the cutting diameter, enabling efficient cutting of tree branches with varying sizes and enhancing versatility for different pruning tasks. The adjustable pruning device (100) comprises a frame (102), an extendable handle (104), a driving unit (108), a primary cutting unit (112), a secondary cutting unit (146), a distance sensor (147), an activation switch (150), a first switch (152), a second switch (154), a power source (156), a controller (158) and a user interface (160). The adjustable pruning device (100) significantly reduces physical effort for the users by automating both the reciprocating motion and cutting feed, making the pruning process easier, especially for individuals with limited strength or endurance.

Specification

Description:DESCRIPTION:
Field of the invention:
[0001] The present disclosure generally relates to the technical field of tree maintenance and horticulture, in specific, relates to an adjustable pruning device that allows users to customize the cutting diameter, enabling efficient cutting of tree branches with varying sizes and enhancing versatility for different pruning tasks.
Background of the invention:
[0002] Pruning tree branches is a vital task in agriculture, landscaping, forestry, and general property maintenance. This process ensures the healthy growth of trees, enhances the aesthetics of landscapes, and prevents potential hazards from falling branches. Tree branches vary significantly in diameter, depending on the type of tree and its growth stage, and pruning operations often require specific tools or equipment suited to different branch sizes. Traditionally, pruning has been carried out manually, with hand tools such as pruning shears, saws, or loppers. These manual methods demand significant physical effort, especially when dealing with thicker branches, and are time-consuming, particularly for large-scale operations.

[0003] For more efficient branch cutting, powered tools such as chainsaws have been introduced, but these tools still require substantial manual control and pose safety risks, especially for untrained users. The operator must exert physical effort to position and operate the tool correctly, and this can be strenuous over prolonged use. Additionally, the risks associated with chainsaws, such as accidental contact with the cutting chain or kickback, increase the potential for injury. Safety concerns are especially relevant when cutting branches at heights, as the user must maintain stability while handling heavy or powerful equipment. However, the chainsaws operate using only a reciprocating motion, meaning the saw blade moves back and forth without any additional cutting feed mechanism to assist in advancing the blade through the material being cut.

[0004] In professional settings, advanced machinery like hydraulic tree trimmers or mounted pruning tools are sometimes used to cut branches more efficiently. However, these machines are costly, require specialized training to operate, and are typically designed for large-scale commercial applications, making them unsuitable for small-scale or residential use. Furthermore, they may not offer the precision needed for cutting branches of varying diameters without causing damage to the tree or surrounding vegetation.

[0005] Existing solutions, while providing partial relief to the manual labor involved in pruning, still suffer from several limitations. These include the need for substantial operator intervention, a lack of versatility in handling branches of different sizes, and safety risks posed by manual tools or power equipment. As the demand for efficient, safe, and user-friendly pruning devices increases, there remains a need for an innovative solution that addresses these challenges comprehensively.

[0006] By addressing all the above-mentioned problems, there is a need for an adjustable pruning device that allows users to customize the cutting diameter, enabling efficient cutting of tree branches with varying sizes and enhancing versatility for different pruning tasks. There is also a need for an adjustable pruning device that enhances the user's convenience by offering versatility in branch cutting, allowing the user to extendable handle various sizes without requiring multiple tools. There is also a need for an adjustable pruning device that significantly reduces physical effort for the users by automating both the reciprocating motion and cutting feed, making the pruning process easier, especially for individuals with limited strength or endurance.

[0007] There is also a need for an adjustable pruning device that quickly adapts to different branch diameters and performs efficient cutting operations, allowing users to complete their pruning tasks more swiftly. Further, there is also a need for an adjustable pruning device that promotes environmental sustainability by powering with a rechargeable battery, reducing reliance on gasoline-powered tools and minimizing harmful emissions.
Objectives of the invention:
[0008] The primary objective of the present invention is to provide an adjustable pruning device that allows users to customize the cutting diameter, enabling efficient cutting of tree branches with varying sizes and enhancing versatility for different pruning tasks.

[0009] Another objective of the present invention is to provide an adjustable pruning device that facilitates simultaneous reciprocating and linear motion to a cutting saw, ensuring efficient and clean cutting while minimizing user effort during pruning operations.

[0010] The other objective of the present invention is to provide an adjustable pruning device that utilizes a driving unit to power both the cutting diameter adjustment and the pruning action, thereby reducing the chances of mechanical failure and enhancing energy efficiency.

[0011] The other objective of the present invention is to provide an adjustable pruning device that incorporates a lead screw shaft, which is configured to provide precise linear movement of the cutting saw, enabling smooth and accurate cutting operations tailored to the user's needs.

[0012] The other objective of the present invention is to provide an adjustable pruning device that comprises a worm gear and a roller to generate the necessary reciprocating motion of the cutting saw, ensuring effective and reliable cutting action during the pruning process.

[0013] The other objective of the present invention is to provide an adjustable pruning device that enhances the user's convenience by offering versatility in branch cutting, allowing the user to extendable handle various sizes without requiring multiple tools.

[0014] The other objective of the present invention is to provide an adjustable pruning device that significantly reduces physical effort for the users by automating both the reciprocating motion and cutting feed, making the pruning process easier, especially for individuals with limited strength or endurance.

[0015] The other objective of the present invention is to provide an adjustable pruning device that improves overall efficiency in pruning operations through the simultaneous reciprocating and linear motion of the cutting saw, which saves time and reduces the strain associated with manual pruning.

[0016] The other objective of the present invention is to provide an adjustable pruning device that ensures precise cutting by integrating a distance sensor and a user interface, allowing for accurate adjustments to the cutting diameter and promoting the health of trees and plants.

[0017] The other objective of the present invention is to provide a user-friendly pole pruner that features a user interface and automatic adjustments, making it accessible for individuals without extensive experience in tree pruning.

[0018] The other objective of the present invention is to provide an adjustable pruning device that enhances safety by automating the operation of the cutting saw, thereby minimizing the risk of accidents and injuries associated with manual handling.

[0019] The other objective of the present invention is to provide a time-saving pole pruner that quickly adapts to different branch diameters and performs efficient cutting operations, allowing users to complete their pruning tasks more swiftly.

[0020] Yet another objective of the present invention is to provide an adjustable pruning device that ensures durability and reliability by using robust components, such as the lead screw shaft and worm gear, capable of withstanding the demands of regular pruning work.

[0021] Further objective of the present invention is to provide an adjustable pruning device that promotes environmental sustainability by powering with a rechargeable battery, reducing reliance on gasoline-powered tools and minimizing harmful emissions.
Summary of the invention:
[0022] The present disclosure proposes an adjustable pruning device for automatic cutting of tree branches of various sizes and method thereof. The following presents a simplified summary in order to provide a basic understanding of some aspects of the claimed subject matter. This summary is not an extensive overview. It is not intended to identify key/critical elements or to delineate the scope of the claimed subject matter. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

[0023] In order to overcome the above deficiencies of the prior art, the present disclosure is to solve the technical problem to provide an adjustable pruning device that allows users to customize the cutting diameter, enabling efficient cutting of tree branches with varying sizes and enhancing versatility for different pruning tasks.

[0024] According to one aspect, the invention provides an adjustable pruning device for automatic cutting of tree branches of various sizes. In one embodiment, the adjustable pruning device comprises a frame, an extendable handle, a driving unit, a lead screw shaft, a ball screw bearing, a primary cutting unit, a secondary cutting unit, a distance sensor, an activation switch, a first switch, a second switch, a power source, a controller and a user interface.

[0025] In one embodiment, the frame having a U-shaped structure. The extendable handle is affixed to the frame. The extendable handle is configured to enable a user to hold the adjustable pruning device for performing a cutting operation. The driving unit is operably disposed within the frame. The driving unit is configured to rotate the lead screw shaft disposed within the frame.

[0026] In one embodiment, the primary cutting unit is movably affixed to the frame. The primary cutting unit is configured to linearly move along the frame through the ball screw bearing that is rotatably positioned over the lead screw shaft upon actuation of the driving unit. The primary cutting unit comprises a worm gear, a drive pulley system, a roller, a supporting plate, a connecting pin, a holding member and a cutting saw.

[0027] In one embodiment, the holding member is mounted over the lead screw shaft via the ball screw bearing to provide linear movement to the primary cutting unit along the frame. The cutting saw is movably positioned on the holding member. The cutting saw is provided with a T-shaped protrusion member having a groove at a rear portion that is inserted through a first opening of the holding member, thereby movably supporting the cutting saw. The roller is rotatably positioned within the supporting plate via a supporting shaft to transmit the rotatory motion to the connecting pin from the worm gear via the drive pulley system.

[0028] In one embodiment, the worm gear is rotatably connected between a pair of stoppers that slide within a slot of the frame, allowing for secure and linear movement along the lead screw shaft. The drive pulley system is configured to operatively connect to the worm gear. The drive pulley system is adapted to rotate the roller is provided with a connecting pin upon actuation of the driving unit. The one end of the connecting pin is positioned into the groove of the T-shaped protrusion member, thereby moving along the groove, which facilitates conversion of a rotation motion of the roller into a reciprocation motion of the cutting saw.

[0029] In one embodiment, the drive pulley system comprises a first pulley, a second pulley and a belt drive. The first pulley is rotatably positioned to the worm gear, which is rotatably positioned on the lead screw shaft. The second pulley rotatably positioned at a rear end portion of the roller. The second pulley and the first pulley are rotatably connected via the belt drive.

[0030] In one embodiment, the frame is provided with a telescopic shaft, which is adjustably connected between the frame and the primary cutting unit. The telescopic shaft is configured to be extended and compressed based on the linear movement of the primary cutting unit, thereby supporting and enhancing the linear movement of the primary cutting unit. The secondary cutting unit is affixed to the frame. The secondary cutting unit is configured to provide support to the tree branch from other side while performing the cutting operation by the primary cutting unit from one side.

[0031] In one embodiment, the user interface is configured to enable the user to provide one or more inputs for activating the adjustable pruning device and adjusting a position of the primary cutting unit according to the size of the tree branch. The controller is configured to control one or more operations of the adjustable pruning device for controlling the cutting operation.

[0032] According to another aspect, the invention provides a method for operating an adjustable pruning device. At one step, the controller supplies the electrical power to the driving unit via the power source upon pressing the activation switch by the user. At one step, the controller receives the one or more inputs related to the diameter of at least one branch of at least one tree from the user through the user interface. At one step, the controller actuates the driving unit to rotate the lead screw shaft in at least one direction upon pressing the first switch by the user, thereby adjusting the position of the primary cutting unit according to the size of the tree branch.

[0033] At one step, the distance sensor detects whether the desired distance between the primary cutting unit and the secondary cutting unit aligns with the size of the tree branch for precise cutting. At one step, the controller deactivates the driving unit to hold the linear movement of the primary cutting unit upon determining the desired distance between the primary cutting unit and the secondary cutting unit aligns with the size of the tree branch using the distance sensor, thereby enabling the user to secure the tree branch within the adjustable pruning device and press the first switch.

[0034] At one step, the controller actuates the driving unit to rotate the lead screw shaft in the at least one direction upon pressing the first switch by the user, thereby moving the primary cutting unit from the first position to the second position to perform the pruning operations of the at least one tree with simultaneous reciprocating motion and cutting feed. At one step, the controller actuates the driving unit to rotate the lead screw shaft in the at least one direction upon pressing the second switch by the user, thereby moving the primary cutting unit from the second position to the first position based on the detected data of the infrared (IR) sensor.

[0035] Further, objects and advantages of the present invention will be apparent from a study of the following portion of the specification, the claims, and the attached drawings.
Detailed description of drawings:
[0036] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate an embodiment of the invention, and, together with the description, explain the principles of the invention.

[0037] FIG. 1 illustrates a schematic view of an adjustable pruning device, in accordance to an exemplary embodiment of the invention.

[0038] FIG. 2 illustrates an exploded view of the adjustable pruning device, in accordance to an exemplary embodiment of the invention.

[0039] FIG. 3 illustrates the schematic view of the adjustable pruning device at initial position, in accordance to an exemplary embodiment of the invention.

[0040] FIGs. 4A-4B illustrate perspective views of the adjustable pruning device while adjusting the position of the primary cutting unit according to the size of a tree branch, in accordance to an exemplary embodiment of the invention.

[0041] FIG. 5 illustrates the perspective view of the adjustable pruning device while securing the tree branch, in accordance to an exemplary embodiment of the invention.

[0042] FIG. 6 illustrates the perspective view of the adjustable pruning device while performing pruning operations of at least one tree with simultaneous reciprocating motion and cutting feed, in accordance to an exemplary embodiment of the invention.

[0043] FIG. 7 illustrates a flowchart of a method for operating the adjustable pruning device, in accordance to an exemplary embodiment of the invention.
Detailed invention disclosure:
[0044] Various embodiments of the present invention will be described in reference to the accompanying drawings. Wherever possible, same or similar reference numerals are used in the drawings and the description to refer to the same or like parts or steps.

[0045] The present disclosure has been made with a view towards solving the problem with the prior art described above, and it is an object of the present invention to provide an adjustable pruning device that allows users to customize the cutting diameter, enabling efficient cutting of tree branches with varying sizes and enhancing versatility for different pruning tasks.

[0046] According to one exemplary embodiment of the invention, FIG. 1 refers to a schematic view of an adjustable pruning device 100. In one embodiment herein, the adjustable pruning device 100 allows users to customize the cutting diameter, enabling efficient cutting of tree branches with varying sizes and enhancing versatility for different pruning tasks. The adjustable pruning device 100 facilitates simultaneous reciprocating and linear motion to a cutting saw, ensuring efficient and clean cutting while minimizing user effort during pruning operations. The adjustable pruning device 100 enhances the user's convenience by offering versatility in branch cutting, allowing the user to extendable handle various sizes without requiring multiple tools. The adjustable pruning device 100 comprises a frame 102, an extendable handle 104, a driving unit 108, a primary cutting unit 112, a secondary cutting unit 146, a distance sensor 147, an activation switch 150, a first switch 152, a second switch 154, a power source 156, a controller 158 and a user interface 160.

[0047] In one embodiment herein, the frame 102 is provided with the extendable handle 104 to bottom portion, thereby enabling the user to hold and operate the adjustable pruning device 100. The driving unit 108 is positioned within the frame 102 at one end. In one embodiment herein, the primary cutting unit 112 is a movable cutting unit. The primary cutting unit 112 is configured to perform the pruning operations of at least one tree with simultaneous reciprocating motion and cutting feed. The primary cutting unit 112 is adapted to move from a first position to a second position based on the rotation of the driving unit 108. The first position is one side of the tree branch. The second position is the other side of the tree branch. The first position is changed according to the size of the tree branch. The secondary cutting unit 146 having a teeth profile 145 is securely affixed to the frame 102. The secondary cutting unit 146 is configured for gripping the at least one branch of the at least one tree during pruning operations.

[0048] In one embodiment herein, the extendable handle 104 is integrated with the activation switch 150, the first switch 152 and the second switch 154 to enable the user to perform the pruning operations using the adjustable pruning device 100. The activation switch 150 is configured to activate the adjustable pruning device 100. The first switch 152 is configured to rotate the driving unit 108 in a clockwise direction. The second switch 154 is configured to rotate the driving unit 108 in a counter clockwise direction.

[0049] In one embodiment herein, the extendable handle 104 is provide with the user interface 160, which is configured to enable the user to provide one or more inputs related to diameter of the at least one branch of the at least one tree. In one embodiment herein, the distance sensor 147 is positioned on the primary cutting unit 112. In one embodiment herein, the extendable handle 104 is configured to extend to a length for facilitating the user to use the adjustable pruning device 100 as a pole pruner.

[0050] The distance sensor 147 is configured to detect whether desired distance between the primary cutting unit 112 and the secondary cutting unit 146 aligns with the size of the tree branch for precise cutting. The power source 156 is configured to supply electrical power for performing the pruning operations. The controller 158 is configured to communicate with the driving unit 108, the distance sensor 147, the activation switch 150, the first switch 152, the second switch 154, the power source 156 and the user interface 160 for controlling the pruning operations.

[0051] According to another exemplary embodiment of the invention, FIG. 2 refers to an exploded view of the adjustable pruning device 100. In one embodiment herein, the frame 102 having U-shaped hallow structure, which is provided with the extendable handle 104. The extendable handle 104 enables the user to hold the adjustable pruning device 100. The driving unit 108 is operatively positioned within the one end of the frame 102. The driving unit 108 is provided with a driving shaft 110. In one embodiment herein, the adjustable pruning device 100 comprises a lead screw shaft 11, which is rotatably positioned within the frame 102. The one end of the lead screw shaft 114 is connected to the driving unit 108 via the driving shaft 110 to rotate at least one direction. The other end of the lead screw shaft 114 is rotatably connected to the frame 102 via bearing unit. The lead screw shaft 114 is provided with screw threading.

[0052] In one embodiment herein, the driving unit 108 is provided with an infrared (IR) sensor 111. The infrared (IR) sensor 111 that monitors the rotations of the driving unit 108, thereby ensuring the number of rotations in the clockwise direction is equal to the counter-clockwise direction. So, the adjustable pruning device 100 is retrieves to its original position upon performing upon performing the pruning operations based on the rotations of the driving unit 108. The infrared (IR) sensor 111 is in communication with the controller 158 to transmit detected data.

[0053] In one embodiment herein, the primary cutting unit 112 is movably affixed to the frame 102. The primary cutting unit 112 is configured to linearly move along the frame 102 through the ball screw bearing 137 that is rotatably positioned over the lead screw shaft 114 upon actuation of the driving unit 108. The primary cutting unit 112 comprises a casing 113, a worm gear 116, a worm shaft 117, stoppers 118, a drive pulley system 120, a roller 128, a supporting plate 130, a connecting pin 132, a holding member 134 and a cutting saw 140.

[0054] In one embodiment herein, the worm gear 116 is slidably coupled with the screw threading of the lead screw shaft 114 to receive a rotatory motion from the driving unit 108. The worm gear 116 having a worm shaft 117, which is rotatably connected between a pair of stoppers 118. The pair of stoppers 118 is slidably disposed within a slot 106 of the frame 102 to secure the linear movement of the worm gear 116 along the lead screw shaft 114 within the frame 102. The lead screw shaft 114 is positioned parallelly to the slot 106 of the frame 102.

[0055] In one embodiment herein, the holding member 134 is mounted over the lead screw shaft 114 via the ball screw bearing 137 to provide linear movement to the primary cutting unit 112 along the frame 102. The cutting saw 140 is movably positioned on the holding member 134. The cutting saw 140 is provided with a T-shaped protrusion member 142 having a groove 144 at a rear portion that is inserted through a first opening 136 of the holding member 134, thereby movably supporting the cutting saw 140.

[0056] In one embodiment herein, the drive pulley system 120 is configured to operatively connect to the worm gear 116 that is rotatably and parallelly positioned over the lead screw shaft 114. The drive pulley system 120 is adapted to rotate the roller 128 provided with the connecting pin 132 upon actuation of the driving unit 108. In one embodiment herein, one end of the connecting pin 132 is positioned into the groove 144 of the T-shaped protrusion member 142, thereby moving along the groove 144, which facilitates conversion of a rotatory motion of the roller 128 into a reciprocation motion of the cutting saw 140.

[0057] In one embodiment herein, the roller 128 is rotatably positioned within the supporting plate 130 via supporting shaft 131 to transmit the rotatory motion to the connecting pin 132 from the worm gear 116 via the drive pulley system 120. The drive pulley system 120 comprises a first pulley 122, a second pulley 124 and a belt drive 126. The first pulley 122 is rotatably positioned to the worm gear 116, which is rotatably positioned on the lead screw shaft 114. The second pulley 124 rotatably positioned at a rear end portion of the roller 128. The second pulley 124 and the first pulley 122 are rotatably connected via the belt drive 126.

[0058] In one embodiment herein, the secondary cutting unit 146 having a teeth profile 145 is securely affixed to the frame 102. The secondary cutting unit 146 is configured for gripping the at least one branch of the at least one tree during pruning operations. The adjustable pruning device 100 having a telescopic shaft 148, which is adjustably connected between the frame 102 and the primary cutting unit 112. The telescopic shaft 144 is configured to be extended and compressed based on the linear movement of the primary cutting unit 112, thereby supporting and enhancing the linear movement of the primary cutting unit 112.

[0059] In one embodiment herein, the extendable handle 104 is integrated with the activation switch 150, the first switch 152 and the second switch 154 to enable the user to perform the pruning operations using the adjustable pruning device 100. The extendable handle 104 is provide with the user interface 160, which is configured to enable the user to provide the one or more inputs related to diameter of the at least one branch of the at least one tree for activating the adjustable pruning device 100 and adjusting the position of the primary cutting unit 112 according to the size of the tree branch. In one embodiment herein, the distance sensor 147 is positioned on the casing 113 of the primary cutting unit 112. The distance sensor 147 is configured to whether the desired distance between the primary cutting unit 112 and the secondary cutting unit 146 aligns with the size of the tree branch for precise cutting.

[0060] In one embodiment herein, the power source 156 is configured to supply electrical power for performing the pruning operations. The controller 158 is configured to communicate with the driving unit 108, the distance sensor 147, the activation switch 150, the first switch 152, the second switch 154, the power source 156 and the user interface 160 for controlling the pruning operations. In one embodiment herein, the controller 158 is configured to receive the one or more inputs related to diameter of the at least one branch of the at least one tree from the user through the user interface 160. The controller 158 is configured to supply electrical power to the driving unit 108 via the power source 156 upon pressing the activation switch 150 by the user.

[0061] In one embodiment herein, the controller 158 is configured to actuate the driving unit 108 to rotate the lead screw shaft 114 in at least one direction for moving the primary cutting unit 112 from the first position to the second position for performing the pruning operations of the at least one tree with simultaneous reciprocating motion and cutting feed. The controller 158 is configured to actuate the driving unit 108 to rotate the lead screw shaft 114 in the at least one direction for moving the primary cutting unit 112 from the second position to the first position upon performing the pruning operations.

[0062] According to another exemplary embodiment of the invention, FIG. 3 refers to the schematic view of the adjustable pruning device 100 at initial position. Initially, the primary cutting unit 112 is at one end of the frame 102. The primary cutting unit 112 is a movable cutting unit. The secondary cutting unit 146 is at the other end of the frame 102. The secondary cutting unit 146 is a fixed cutting unit. The driving unit 108 is provided with an infrared (IR) sensor 111.

[0063] The infrared (IR) sensor 111 that monitors the rotations of the driving unit 108, thereby ensuring the number of rotations in the clockwise direction is equal to the counter-clockwise direction. So, the adjustable pruning device 100 is retrieves to its original position upon performing upon performing the pruning operations based on the rotations of the driving unit 108. The infrared (IR) sensor 111 is in communication with the controller 158 to transmit detected data.

[0064] In one embodiment herein, the holding member 134 of the primary cutting unit 112 is mounted over the lead screw shaft 114 via the ball screw bearing 137 to provide linear movement to the primary cutting unit 112 along the frame 102. The ball screw bearing 137 is rotatably coupled with the screw threading of the lead screw shaft 114 to convert the rotatory motion from the driving unit 108 into the linear motion to the primary cutting unit 112.

[0065] In one embodiment herein, the worm gear 116 is slidably coupled with the screw threading of the lead screw shaft 114 to transmit the rotatory motion to the connecting pin 132 of the roller 128 via the drive pulley system 120 from the driving unit 108. The one end of the connecting pin 132 is positioned into the groove 144 of the T-shaped protrusion member 142, thereby moving along the groove 144, which facilitates conversion of the rotation motion of the roller 128 into the reciprocation motion of the cutting saw 140. So, the primary cutting unit 112 receives both linear and reciprocating motions via the ball screw bearing 137 of the holding member 134 and the worm gear 116, respectively, based on the rotation of the driving unit 108.

[0066] According to another exemplary embodiment of the invention, FIGs. 4A-4B refer to perspective views of the adjustable pruning device 100 while adjusting the position of the primary cutting unit 112 according to the size of the tree branch. Initially the user needs to determine the diameter of the tree branch. In one embodiment herein, the user needs to press the activation switch 150. The controller 158 receive the input from the activation switch 150. The controller 158 activates the adjustable pruning device 100 by supplying the electrical power through the power source 156 based on the input of the activation switch 150.

[0067] In one embodiment herein, the user needs to provide the one or more inputs related to the diameter of the tree branch through the user interface 160. The controller 158 receives the one or more inputs through the user interface 160 for performing the further operations. The user needs press the first switch 152. In one embodiment herein, the controller 158 receives the input from the first switch 152. The controller 158 actuates the driving unit 108 (as shown in FIG 3) to rotate in the clockwise direction. The lead screw shaft 114 is rotatably connected to the driving unit 108 via the driving shaft 110. So, the lead screw shaft 114 is also rotated in the clockwise direction based on the rotation of the driving unit 108, as shown in the FIG. 4A.

[0068] In one embodiment herein, the ball screw bearing 137 is rotatably coupled with the screw threading of the lead screw shaft 114 to convert the rotatory motion from the driving unit 108 into the linear motion to the primary cutting unit 112. So, the controller 158 actuates the driving unit 108 to rotate the lead screw shaft 114 in the clockwise direction upon pressing the first switch 152 by the user, thereby adjusting the position of the primary cutting unit 112 according to the size of the tree branch.

[0069] In one embodiment herein, the distance sensor 147 detects whether the desired distance between the primary cutting unit 112 and the secondary cutting unit 146 aligns with the size of the tree branch for precise cutting. The controller 158 deactivates the driving unit 108 to hold the linear movement of the primary cutting unit 112 upon determining the desired distance between the primary cutting unit 112 and the secondary cutting unit 146 aligns with the size of the tree branch using the distance sensor 147, thereby enabling the user to secure the tree branch within the adjustable pruning device 100.

[0070] In one embodiment herein, the user positions the adjustable pruning device 100 near to the tree branch. The user ensures that the tree branch is disposed between the primary cutting unit 112 and the secondary cutting unit 146. Now the user needs to press the first switch 152. The controller 158 actuates the driving unit 108 to rotate the lead screw shaft 114 in the clockwise direction upon pressing the first switch 152 by the user, thereby moving the primary cutting unit 112 from the first position to the second position to perform the pruning operations of the at least one tree with simultaneous reciprocating motion and cutting feed.

[0071] In one embodiment herein, the worm gear 116 is slidably coupled with the screw threading of the lead screw shaft 114 to receive the rotatory motion from the driving unit 108. The drive pulley system 120 is configured to operatively connect to the worm gear 116 that is rotatably and parallelly positioned over the lead screw shaft 114. The drive pulley system 120 is adapted to rotate the roller 128 provided with the connecting pin 132 upon actuation of the driving unit 108. In one embodiment herein, the one end of the connecting pin 132 is positioned into the groove 144 of the T-shaped protrusion member 142, thereby moving along the groove 144, which facilitates conversion of the rotatory motion of the roller 128 into the reciprocation motion of the cutting saw 140. So, the cutting saw 140 of the primary cutting unit 112 receives both linear and reciprocating motions via the ball screw bearing 137 of the holding member 134 and the worm gear 116, respectively, based on the rotation of the driving unit 108. The cutting saw 140 of the primary cutting unit 112 performs the pruning operations of the at least one tree with simultaneous reciprocating motion and cutting feed.

[0072] In one embodiment herein, the roller 128 is rotatably positioned within the supporting plate 130 to transmit the rotatory motion to the connecting pin 132 from the worm gear 116 via the drive pulley system 120. The worm gear 116 is rotatably connected to the connecting pin 132 through the roller 128 via the drive pulley system 108 to provide the rotatory motion to the connecting pin 132, which is dispose within the groove 144 of the T-shaped protrusion member 142 through the holding member 134, thereby converting the rotatory motion into the reciprocating motion to the cutting saw 140, and providing simultaneous reciprocating motion and cutting feed to perform pruning operations of at least one tree, as shown in the FIG. 4B.

[0073] According to another exemplary embodiment of the invention, FIG. 5 refers to the perspective view of the adjustable pruning device 100 while securing tree branch. In one embodiment herein, the tree branch is positioned between the primary cutting unit 112 and the secondary cutting unit 146. The primary cutting unit 112 moves linearly from the first position to the second position along the lead screw shaft 114. The primary cutting unit 112 provides simultaneous reciprocating motion and cutting feed to perform pruning operations of at least one tree. The secondary cutting unit 146 grips the at least one branch of the at least one tree during pruning operations through the teeth profile 145.

[0074] According to another exemplary embodiment of the invention, FIG. 6 refer to the perspective views of the adjustable pruning device 100 while performing pruning operations of at least one tree with simultaneous reciprocating motion and cutting feed. In one embodiment herein, the controller 158 actuates the driving unit 108 to rotate the lead screw shaft 114 in the clockwise direction for moving the primary cutting unit 112 from the first position to the second position upon activating the first switch 152 for performing the pruning operations of the at least one tree with simultaneous reciprocating motion and cutting feed.

[0075] The infrared (IR) sensor 111 monitors the rotations of the driving unit 108, thereby ensuring the number of rotations in the clockwise direction is equal to the counter-clockwise direction. The controller 158 actuates the driving unit 108 to rotate the lead screw shaft 114 in the at least one direction for moving the primary cutting unit 112 from the second position to the first position based on the detected data of the infrared (IR) sensor 111.

[0076] According to another exemplary embodiment of the invention, FIG 7. refers to a flowchart 700 of a method for operating an adjustable pruning device 100. At step 702, the controller 158 supplies the electrical power to the driving unit 108 via the power source 156 upon pressing the activation switch 150 by the user. At step 704, the controller 158 receives the one or more inputs related to the diameter of at least one branch of at least one tree from the user through the user interface 160. At step 706, the controller 158 actuates the driving unit 108 to rotate the lead screw shaft 114 in at least one direction upon pressing the first switch 152 by the user, thereby adjusting the position of the primary cutting unit 112 according to the size of the tree branch.

[0077] At step 708, the distance sensor 147 detects whether the desired distance between the primary cutting unit 112 and the secondary cutting unit 146 aligns with the size of the tree branch for precise cutting. At step 710, the controller 158 deactivates the driving unit 108 to hold the linear movement of the primary cutting unit 112 upon determining the desired distance between the primary cutting unit 112 and the secondary cutting unit 146 aligns with the size of the tree branch using the distance sensor 147, thereby enabling the user to secure the tree branch within the adjustable pruning device 100 and press the first switch 152.

[0078] At step 712, the controller 158 actuates the driving unit 108 to rotate the lead screw shaft 114 in the at least one direction upon pressing the first switch 152 by the user, thereby moving the primary cutting unit 112 from the first position to the second position to perform the pruning operations of the at least one tree with simultaneous reciprocating motion and cutting feed. At step 714, the controller actuates the driving unit 108 to rotate the lead screw shaft 114 in the at least one direction upon pressing the second switch 154 by the user, thereby moving the primary cutting unit 112 from the second position to the first position based on the detected data of the infrared (IR) sensor 111.

[0079] Numerous advantages of the present disclosure may be apparent from the discussion above. In accordance with the present disclosure an adjustable pruning device 100 for cutting tree branches of variable diameters and method of operation, is disclosed. The proposed invention provides an adjustable pruning device 100 that allows users to customize the cutting diameter, enabling efficient cutting of tree branches with varying sizes and enhancing versatility for different pruning tasks. The adjustable pruning device 100 enhances the user's convenience by offering versatility in branch cutting, allowing the user to extendable handle various sizes without requiring multiple tools.

[0080] The adjustable pruning device 100 significantly reduces physical effort for the users by automating both the reciprocating motion and cutting feed, making the pruning process easier, especially for individuals with limited strength or endurance. The adjustable pruning device 100 quickly adapts to different branch diameters and performs efficient cutting operations, allowing users to complete their pruning tasks more swiftly. The adjustable pruning device 100 promotes environmental sustainability by powering with a rechargeable battery, reducing reliance on gasoline-powered tools and minimizing harmful emissions.

[0081] It will readily be apparent that numerous modifications and alterations can be made to the processes described in the foregoing examples without departing from the principles underlying the invention, and all such modifications and alterations are intended to be embraced by this application.

, Claims:CLAIMS:
I/We Claim:
1. An adjustable pruning device (100) for automatic cutting of tree branches of various sizes, comprising:
a frame (102) having a U-shaped structure;
an extendable handle (104) affixed to the frame (102), wherein the extendable handle (104) is configured to enable a user to hold the adjustable pruning device (100) for performing a cutting operation;
a driving unit (108) operably disposed within the frame (102), wherein the driving unit (108) is configured to rotate a lead screw shaft (114) disposed within the frame (102);
a primary cutting unit (112) movably affixed to the frame (102), wherein the primary cutting unit (112) is configured to linearly move along the frame (102) through a ball screw bearing (137) that is rotatably positioned over the lead screw shaft (114) upon actuation of the driving unit (108),
wherein the primary cutting unit (112) comprises:
a holding member (134) mounted over the lead screw shaft (114) via the ball screw bearing (137) to provide linear movement to the primary cutting unit (112) along the frame (102);
a cutting saw (140) movably positioned on the holding member (134), wherein the cutting saw (140) is provided with a T-shaped protrusion member (142) having a groove (144) at a rear portion that is inserted through a first opening (136) of the holding member (134), thereby movably supporting the cutting saw (140); and
a drive pulley system (120) configured to operatively connect to a worm gear (116) that is rotatably and parallelly positioned over the lead screw shaft (114), wherein the drive pulley system (120) is adapted to rotate a roller (128) provided with a connecting pin (132) upon actuation of the driving unit (108),
wherein one end of the connecting pin (132) is positioned into the groove (144) of the T-shaped protrusion member (142), thereby moving along the groove (144), which facilitates conversion of a rotation motion of the roller (128) into a reciprocation motion of the cutting saw (140);
a secondary cutting unit (146) affixed to the frame (102), wherein the secondary cutting unit (146) is configured to provide support to the tree branch from other side while performing the cutting operation by the primary cutting unit (112) from one side;
a user interface (160) configured to enable the user to provide one or more inputs for activating the adjustable pruning device (100) and adjusting a position of the primary cutting unit (112) according to the size of the tree branch; and
a controller (158) configured to control one or more operations of the adjustable pruning device (100) for controlling the cutting operation.
2. The adjustable pruning device (100) as claimed in claim 1, wherein the frame (102) is provided with a telescopic shaft (148), which is adjustably connected between the frame (102) and the primary cutting unit (112),
wherein the telescopic shaft (144) is configured to be extended and compressed based on the linear movement of the primary cutting unit (112), thereby supporting and enhancing the linear movement of the primary cutting unit (112).
3. The adjustable pruning device (100) as claimed in claim 1, wherein the worm gear (116) is rotatably connected between a pair of stoppers (118) that slide within a slot (106) of the frame (102), allowing for secure and linear movement along the lead screw shaft (114).
4. The adjustable pruning device (100) as claimed in claim 1, wherein the roller (128) is rotatably positioned within a supporting plate (130) via a supporting shaft (131) to transmit the rotatory motion to the connecting pin (132) from the worm gear (116) via the drive pulley system (120).
5. The adjustable pruning device (100) as claimed in claim 1, wherein the drive pulley system (120) comprises:
a first pulley (122) rotatably positioned to the worm gear (116), which is rotatably positioned on the lead screw shaft (114); and
a second pulley (124) rotatably positioned at a rear end portion of the roller (128), wherein the second pulley (124) and the first pulley (122) are rotatably connected via a belt drive (126).
6. The adjustable pruning device (100) as claimed in claim 1, wherein the adjustable pruning device (100) comprises an infrared (IR) sensor (111) that monitors the rotations of the driving unit (108), thereby ensuring the number of rotations in a clockwise direction is equal to a counter-clockwise direction,
wherein the infrared (IR) sensor (111) is in communication with the controller (158) to transmit detected data.
7. The adjustable pruning device (100) as claimed in claim 1, wherein the adjustable pruning device (100) comprises a distance sensor (147), which is configured to whether the desired distance between the primary cutting unit (112) and the secondary cutting unit (146) aligns with the size of the tree branch for precise cutting,
wherein the distance sensor (147) is in communication with the controller (158) to transmit detected data.
8. The adjustable pruning device (100) as claimed in claim 1, wherein the adjustable pruning device (100) comprises an activation switch (150), a first switch (152) and a second switch (154), which are in communication with the controller (158).
9. The adjustable pruning device (100) as claimed in claim 1, wherein the adjustable pruning device (100) comprises a power source (156) is configured to supply electrical power for performing the pruning operations.
10. A method for operating an adjustable pruning device (100), comprising:
supplying, by a controller (158), electrical power to a driving unit (108) via a power source (156) upon pressing an activation switch (150) by the user;
receiving, by the controller (158), one or more inputs related to diameter of at least one branch of at least one tree from a user through a user interface (160);
actuating, by the controller (158), the driving unit (108) to rotate a lead screw shaft (114) in at least one direction upon pressing a first switch (152) by the user, thereby adjusting a position of the primary cutting unit (112) according to the size of the tree branch;
detecting, by a distance sensor (147), whether the desired distance between the primary cutting unit (112) and the secondary cutting unit (146) aligns with the size of the tree branch for precise cutting;
deactivating, by the controller (158), the driving unit (108) to hold the linear movement of the primary cutting unit (112) upon determining the desired distance between the primary cutting unit (112) and the secondary cutting unit (146) aligns with the size of the tree branch using the distance sensor (147), thereby enabling the user to secure the tree branch within the adjustable pruning device (100) and press the first switch (152);
actuating, by the controller (158), the driving unit (108) to rotate the lead screw shaft (114) in the at least one direction upon pressing the first switch (152) by the user, thereby moving the primary cutting unit (112) from a first position to a second position to perform the pruning operations of the at least one tree with simultaneous reciprocating motion and cutting feed; and
actuating, by the controller (158), the driving unit (108) to rotate the lead screw shaft (114) in the at least one direction upon pressing a second switch (154) by the user, thereby moving the primary cutting unit (112) from the second position to the first position based on the detected data of the infrared (IR) sensor (111).

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