CONCEALED DOOR HINGE APPARATUS FOR COUNTERACTING DOOR IMPACT AND GUIDED CLOSURE

Abstract

The present disclosure discloses a concealed door hinge apparatus comprising a hinge housing encasing a torsion spring assembly to apply counteracting force. A soft-stop buffer pad is positioned adjacently within the hinge housing to absorb door impact. A retractable guide pin intersects the torsion spring assembly to provide guided door closure.

Specification

Description:Field of the Invention


The present disclosure generally relates to door hardware systems. Further, the present disclosure particularly relates to a concealed door hinge apparatus.
Background
The background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
Various concealed door hinge mechanisms have been developed in the past for facilitating the smooth opening and closing of doors. Such mechanisms are typically employed in different types of doors, including residential, commercial, and automotive doors. The general purpose of concealed door hinges is to maintain aesthetic appeal by hiding the hinge structure while providing a durable, reliable, and efficient mechanism for controlling the motion of the door. One well-known approach involves the use of standard hinge assemblies with basic pivot points to allow the door to swing open and closed. However, such basic mechanisms often lack control over the force applied to the door, leading to issues like abrupt door closure and possible damage to the door frame.
In some conventional systems, the incorporation of hydraulic or pneumatic dampers has been used to control the speed of door closure. Such mechanisms utilize fluid resistance to slow down the motion of the door as it approaches a fully closed position. Although hydraulic and pneumatic dampers provide a degree of control, they are prone to leakage over time, which leads to reduced efficiency and eventual failure. Moreover, hydraulic-based systems often require frequent maintenance, which increases the operational costs and inconvenience for users. Additionally, the integration of fluid-based dampers tends to increase the overall complexity and size of the hinge mechanism, limiting the range of applications where such systems can be employed.
Another widely known concealed door hinge system includes the use of mechanical springs to provide resistance against the force applied to the door during opening and closing. Springs offer a low-maintenance alternative to hydraulic systems but are often associated with imprecise control over the force exerted on the door. Conventional spring-based systems can lead to unintended rapid closure of the door, which increases the risk of injury or damage to property. Furthermore, such spring mechanisms tend to generate noise during door operation, which detracts from the overall user experience. The lack of smooth and silent operation in spring-based hinges is a significant drawback, particularly in environments where noise reduction is a priority, such as hospitals, offices, and residential buildings.
In certain prior art systems, additional components like guide pins have been introduced to provide better alignment and guidance during door closure. Such guide mechanisms improve the alignment of the door with the frame but often introduce additional friction, leading to wear and tear of the hinge components over time. Excessive friction within the hinge assembly can also lead to operational inefficiencies, such as increased force requirements for opening and closing the door. Moreover, conventional guide pin systems do not always provide sufficient precision in controlling the alignment, leading to misaligned doors or incomplete closure, which compromises both functionality and aesthetics.
In light of the above discussion, there exists an urgent need for solutions that overcome the problems associated with conventional systems and/or techniques for enabling smooth and reliable door closure, while minimizing noise, wear, and operational inefficiencies.
Summary
The following presents a simplified summary of various aspects of this disclosure in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements nor delineate the scope of such aspects. Its purpose is to present some concepts of this disclosure in a simplified form as a prelude to the more detailed description that is presented later.
The following paragraphs provide additional support for the claims of the subject application.
An objective of the present disclosure is to provide a concealed door hinge apparatus that optimizes door movement, enhances door impact absorption, and enables precise guided closure. The apparatus aims to improve the durability and efficiency of concealed hinges used in various door systems.
In an aspect, the present disclosure provides a concealed door hinge apparatus comprising a hinge housing encasing a torsion spring assembly that applies counteracting force. A soft-stop buffer pad positioned adjacent within the hinge housing absorbs door impact, while a retractable guide pin intersects the torsion spring assembly to enable guided door closure.
Further, the concealed door hinge apparatus incorporates a torsion spring assembly with a variable tension coil that intersects with the retractable guide pin to modulate the counteracting force, enabling adjustable resistance during door movement. The hinge housing further features an integrated alignment slot to maintain precise positioning of the retractable guide pin, improving the accuracy of door closure. Moreover, the retractable guide pin is fitted with a tapered end, facilitating smooth insertion into a receiving channel within the hinge housing to improve operational efficiency.
Moreover, the hinge housing includes a railway-derived damping insert, providing additional vibration reduction during door movement. The concealed door hinge apparatus further includes a cam follower inspired by railway coach mechanisms, intersecting with the torsion spring assembly to guide the retractable guide pin along a precise path. Furthermore, the hinge housing contains a detachable cover plate, allowing access to the torsion spring assembly for maintenance or tension adjustment.
Additionally, the soft-stop buffer pad comprises a multi-layered structure, each layer with varying density, to provide graduated resistance during door closure, enhancing the smoothness of operation. Moreover, the retractable guide pin incorporates a biasing spring to maintain engagement with the hinge housing during operation. Furthermore, the torsion spring assembly is calibrated with a preload setting, aligned with the hinge housing to provide initial tension, improving the responsiveness of door movement and ensuring reliable performance in the long term.

Brief Description of the Drawings


The features and advantages of the present disclosure would be more clearly understood from the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 illustrates a concealed door hinge apparatus (100), in accordance with the embodiments of the present disclosure.
FIG. 2 illustrates the operational sequence of a concealed door hinge apparatus (100), including its key components, in accordance with the embodiments of the present disclosure.
Detailed Description
In the following detailed description of the invention, reference is made to the accompanying drawings that form a part hereof, and in which is shown, by way of illustration, specific embodiments in which the invention may be practiced. In the drawings, like numerals describe substantially similar components throughout the several views. These embodiments are described in sufficient detail to claim those skilled in the art to practice the invention. Other embodiments may be utilized and structural, logical, and electrical changes may be made without departing from the scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined only by the appended claims and equivalents thereof.
The use of the terms "a" and "an" and "the" and "at least one" and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The use of the term "at least one" followed by a list of one or more items (for example, "at least one of A and B") is to be construed to mean one item selected from the listed items (A or B) or any combination of two or more of the listed items (A and B), unless otherwise indicated herein or clearly contradicted by context. The terms "comprising," "having," "including," and "containing" are to be construed as open-ended terms (i.e., meaning "including, but not limited to,") unless otherwise noted. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.
Pursuant to the "Detailed Description" section herein, whenever an element is explicitly associated with a specific numeral for the first time, such association shall be deemed consistent and applicable throughout the entirety of the "Detailed Description" section, unless otherwise expressly stated or contradicted by the context.
As used herein, the term "concealed door hinge apparatus" refers to a mechanical assembly designed to facilitate the seamless operation of a door while being hidden from view. The concealed door hinge apparatus encompasses various elements that enable the door to move smoothly and silently while ensuring structural integrity. The apparatus may be utilized in residential, commercial, or industrial doors where aesthetics and reliability are important. The concealed door hinge apparatus allows the door to be opened or closed without visible mechanical components. Such an apparatus generally includes elements like hinge housing, torsion springs, and guide pins, all working in unison to provide a reliable and unobtrusive door operation mechanism. Additionally, the concealed door hinge apparatus can be used with various types of doors, including wooden, metal, and composite materials, providing versatility across different applications. The concealed nature of the hinge enhances the visual appeal of the door by hiding mechanical parts from the exterior, ensuring a clean and sleek appearance.
As used herein, the term "hinge housing" refers to an enclosure or casing that holds the various mechanical components necessary for the operation of the concealed door hinge apparatus. The hinge housing serves as the primary structure that secures and protects the internal parts such as the torsion spring assembly and the retractable guide pin. The hinge housing is typically manufactured from durable materials such as metals or high-strength polymers to withstand regular wear and tear during door operation. Additionally, the hinge housing is designed to remain hidden within the door frame, providing a concealed mechanism that contributes to the aesthetic appeal of the door assembly. Said hinge housing may vary in size and configuration depending on the specific application, ensuring compatibility with different types of doors and installation environments. Furthermore, the hinge housing ensures that the internal components remain securely enclosed, preventing exposure to external elements, which could affect the longevity and performance of the concealed door hinge apparatus.
As used herein, the term "torsion spring assembly" refers to a mechanical component designed to store and release rotational energy to facilitate the movement of the door. The torsion spring assembly is encased within the hinge housing and works by applying a counteracting force to assist in the opening and closing of the door. The torsion spring assembly typically comprises one or more torsion springs, which are coiled and compressed when the door is opened, and gradually release the stored energy as the door closes, ensuring controlled movement. The torsion spring assembly is crucial for maintaining the balance of the door, preventing sudden slamming and enabling smooth operation. Additionally, the torsion spring assembly is adaptable for use with different door weights and sizes, providing flexibility across various applications. Said torsion spring assembly may be manufactured from high-tensile materials, such as steel, to ensure durability and long-lasting performance in environments that demand frequent door usage.
As used herein, the term "soft-stop buffer pad" refers to a component positioned within the hinge housing adjacent to the door to absorb impact and reduce noise during door operation. The soft-stop buffer pad is typically made from soft, resilient materials such as rubber or foam, which compresses upon contact to mitigate the force exerted when the door closes. The soft-stop buffer pad plays a critical role in ensuring a quiet and smooth closing motion by minimizing the impact between the door and the frame, thus enhancing the overall operation of the concealed door hinge apparatus. Said soft-stop buffer pad can be tailored to accommodate different door weights and materials, ensuring compatibility across a wide range of door applications. Additionally, the soft-stop buffer pad prolongs the lifespan of both the door and the concealed door hinge apparatus by reducing wear and tear caused by repetitive door impacts over time.
As used herein, the term "retractable guide pin" refers to a mechanical pin that intersects with the torsion spring assembly to guide the door's movement and alignment during operation. The retractable guide pin ensures that the door remains properly aligned as it opens and closes, preventing misalignment or jamming. The retractable guide pin is capable of extending or retracting based on the door's position, thereby enabling precise control over the door's motion. Said retractable guide pin may be constructed from durable materials such as stainless steel to withstand repeated use without degradation. Additionally, the retractable guide pin is housed within the concealed door hinge apparatus, contributing to the overall seamless appearance of the door assembly. The retractable guide pin is compatible with a variety of door types and can be adjusted to meet the specific requirements of different installations, ensuring smooth operation and prolonged durability across diverse applications.
FIG. 1 illustrates a concealed door hinge apparatus (100), in accordance with the embodiments of the present disclosure. In an embodiment, a hinge housing (102) is provided to encase various mechanical components of the concealed door hinge apparatus (100). Said hinge housing (102) may be constructed from metal, plastic, or other durable materials capable of withstanding the mechanical stresses associated with repeated door movement. The hinge housing (102) acts as a protective enclosure for the internal components, including a torsion spring assembly (104), preventing exposure to external elements such as dust, moisture, or accidental damage. The dimensions and structure of the hinge housing (102) may be adjusted depending on the size and weight of the door to which the hinge apparatus (100) is applied. Said hinge housing (102) may further be designed to be concealed within the door or door frame, contributing to the aesthetic appeal of the door assembly. Additionally, the hinge housing (102) provides mounting points for attachment to the door and the frame, ensuring that the door operates smoothly without visible hardware.
In an embodiment, a torsion spring assembly (104) is encased within the hinge housing (102) and serves to apply counteracting force during door operation. The torsion spring assembly (104) generally comprises one or more coiled springs that store mechanical energy when the door is opened and release such stored energy when the door is closed. Said torsion spring assembly (104) assists in controlling the speed and motion of the door by providing resistance, thereby preventing the door from closing abruptly or slamming. The torsion spring assembly (104) may be designed to accommodate various door weights, ensuring compatibility with different door types. The torsion spring assembly (104) is positioned and mounted in such a manner that allows it to interact with other components, including a retractable guide pin (108) and a soft-stop buffer pad (106). Materials for the torsion spring assembly (104) may include high-tensile steel or other durable materials capable of withstanding repeated compression and decompression cycles.
In an embodiment, a soft-stop buffer pad (106) is positioned adjacently within the hinge housing (102) to absorb impact when the door reaches its closed position. Said soft-stop buffer pad (106) is made from resilient materials such as rubber, silicone, or foam that can compress upon contact with the door, thereby reducing the force of the impact and minimizing noise. The soft-stop buffer pad (106) is strategically placed to ensure that it effectively cushions the door and prevents any damage to the door or the surrounding frame. Additionally, the soft-stop buffer pad (106) prolongs the lifespan of the concealed door hinge apparatus (100) by mitigating the wear and tear that can result from repetitive door impacts. The thickness and material composition of the soft-stop buffer pad (106) may vary based on the weight of the door and the specific requirements of the application. Said soft-stop buffer pad (106) provides a critical cushioning element within the hinge housing (102).
In an embodiment, a retractable guide pin (108) intersects the torsion spring assembly (104) and provides guided movement for the door during operation. The retractable guide pin (108) operates by extending or retracting depending on the position of the door, maintaining proper alignment and preventing the door from shifting or becoming misaligned. Said retractable guide pin (108) is typically made from strong materials such as stainless steel or high-strength alloys, ensuring durability and long-term use. The retractable guide pin (108) interacts with the torsion spring assembly (104) to control the door's movement, ensuring a smooth and controlled closing action. Furthermore, the retractable guide pin (108) is housed within the hinge housing (102), maintaining the concealed nature of the entire apparatus while ensuring efficient door operation. Said retractable guide pin (108) is adaptable to various door types and can be adjusted to accommodate different installation conditions, ensuring proper functionality across a range of door systems.
In an embodiment, the torsion spring assembly (104) comprises a variable tension coil, which interacts with the retractable guide pin (108) to modulate the counteracting force applied during door operation. The variable tension coil allows for adjustable resistance, depending on the position of the door and the amount of force needed to open or close the door smoothly. Such a coil may be wound from high-tensile materials, such as steel or alloy, and is capable of storing varying amounts of mechanical energy based on the force exerted by the user. The interaction between the variable tension coil and the retractable guide pin (108) allows the torsion spring assembly (104) to provide a more customizable level of resistance, accommodating different door weights and sizes. The coil may feature a graded design, with tighter windings at certain points to increase resistance and looser windings at other points to reduce resistance. This setup enables smoother door operation and provides flexibility in adjusting the counteracting force applied by the torsion spring assembly (104).
In an embodiment, the hinge housing (102) features an integrated alignment slot, designed to maintain the precise positioning of the retractable guide pin (108) during door movement. The alignment slot is a narrow groove or channel within the hinge housing (102) that guides the retractable guide pin (108) along a specific path, preventing any lateral movement or misalignment that could affect door operation. The slot may be designed with high precision to ensure that the retractable guide pin (108) moves smoothly within it, minimizing friction and wear over time. The alignment slot ensures that the retractable guide pin (108) remains securely in place while allowing the pin to extend or retract as needed during door opening and closing. Materials used for the alignment slot may include hardened steel or other durable materials, chosen for their ability to resist wear and maintain structural integrity during prolonged use. The integrated alignment slot contributes to the overall stability of the concealed door hinge apparatus (100).
In an embodiment, the retractable guide pin (108) is fitted with a tapered end to facilitate smooth insertion into a receiving channel within the hinge housing (102). The tapered end of the retractable guide pin (108) features a gradually narrowing tip, which allows the pin to easily engage with the receiving channel, reducing friction and resistance during door movement. The receiving channel is positioned within the hinge housing (102) and is designed to securely hold the retractable guide pin (108) in place during door operation. The tapering of the guide pin's end enables a seamless interaction between the pin and the receiving channel, ensuring smooth engagement and disengagement as the door opens and closes. The retractable guide pin (108) may be constructed from hardened steel or similar durable materials to ensure that the tapered end maintains its shape and function over prolonged use. The combination of the tapered end and the receiving channel enhances the precision of the concealed door hinge apparatus (100).
In an embodiment, the concealed door hinge apparatus (100) further comprises a railway-derived damping insert (110) positioned within the hinge housing (102) to provide additional vibration reduction during door movement. The damping insert (110) is inspired by vibration-dampening technologies used in railway applications, where consistent and effective vibration control is essential. Said damping insert (110) may be constructed from rubber, silicone, or other elastic materials that are capable of absorbing vibrations and preventing the transfer of shock to other components of the door assembly. The damping insert (110) is strategically placed within the hinge housing (102) to reduce vibrations that occur during the opening and closing of the door, thereby prolonging the lifespan of the mechanical components and enhancing the smoothness of door operation. The material and dimensions of the damping insert (110) may vary depending on the specific requirements of the door system, ensuring flexibility in various applications of the concealed door hinge apparatus (100).
In an embodiment, the concealed door hinge apparatus (100) includes a cam follower, inspired by mechanisms used in railway coaches, which intersects with the torsion spring assembly (104) to guide the retractable guide pin (108) along a precise path during door movement. The cam follower is a mechanical element that interacts with a specially shaped track or cam surface to direct the motion of the retractable guide pin (108). The cam follower ensures that the guide pin moves smoothly along its predetermined path, preventing any deviation that could lead to misalignment or mechanical failure. The cam follower may be constructed from high-strength materials, such as steel or alloy, chosen for their ability to withstand repeated mechanical stress. The shape and positioning of the cam follower within the hinge housing (102) are designed to optimize the interaction between the torsion spring assembly (104) and the retractable guide pin (108), ensuring a controlled and reliable door movement.
In an embodiment, the hinge housing (102) is equipped with a detachable cover plate, allowing access to the torsion spring assembly (104) for maintenance or tension adjustment. The detachable cover plate is securely fastened to the hinge housing (102) using screws, clips, or other fastening mechanisms, providing an easily removable section of the hinge housing for accessing internal components. The cover plate is designed to protect the torsion spring assembly (104) from external elements while still offering convenient access when needed. Such a cover plate is made from durable materials, such as metal or high-strength plastic, to ensure long-term reliability. The ability to remove the cover plate allows for periodic inspections, maintenance, or adjustments to the tension of the torsion spring assembly (104), enabling the hinge apparatus (100) to be customized for different door applications. The detachable nature of the cover plate also simplifies repairs or replacements of internal components when necessary.
In an embodiment, the soft-stop buffer pad (106) comprises a multi-layered structure, with each layer featuring varying density to provide graduated resistance during door closure. The multi-layered buffer pad is designed to absorb the impact of the closing door in stages, with softer layers compressing first, followed by denser layers that provide greater resistance. This graduated resistance ensures that the door closes smoothly and quietly, reducing the force of impact and preventing damage to the door or frame. The soft-stop buffer pad (106) is made from materials such as rubber, foam, or silicone, with each layer carefully selected to optimize the cushioning effect. The number of layers and their specific densities may be adjusted based on the weight and size of the door, ensuring compatibility with a wide range of door systems. The multi-layered design enhances the performance of the soft-stop buffer pad (106) by providing more effective cushioning compared to a single-layer pad.
In an embodiment, the retractable guide pin (108) incorporates a biasing spring to maintain engagement with the hinge housing (102) during door movement. The biasing spring applies a constant force to the guide pin, ensuring that the pin remains in contact with the hinge housing (102) and follows its designated path without deviation. The biasing spring may be made from materials such as steel or alloy, chosen for their elasticity and durability, ensuring that the spring can withstand repeated compression and extension during door operation. The force applied by the biasing spring may be calibrated to suit the specific requirements of the door system, providing the necessary tension to keep the retractable guide pin (108) properly engaged with the hinge housing (102) at all times. The inclusion of the biasing spring ensures consistent performance of the concealed door hinge apparatus (100), reducing the risk of misalignment or mechanical failure over time.
In an embodiment, the torsion spring assembly (104) is calibrated with a preload setting, aligned with the hinge housing (102) to provide initial tension and improve the responsiveness of door movement. The preload setting refers to the pre-compression of the torsion spring assembly (104) before the door is installed or operated, ensuring that the spring is already under a certain amount of tension from the outset. This preload helps the torsion spring assembly (104) respond more quickly to the force applied during door operation, enabling smoother and more controlled movement. The preload setting may be adjusted based on the specific weight and size of the door, allowing for a customized level of tension that optimizes the performance of the concealed door hinge apparatus (100). The torsion spring assembly (104) is securely positioned within the hinge housing (102) to maintain the preload setting and ensure consistent operation over time, even under repeated use.
FIG. 2 illustrates the operational sequence of a concealed door hinge apparatus (100), including its key components, in accordance with the embodiments of the present disclosure. When the user initiates door opening, the door rotates, causing interaction with the hinge housing (102). The hinge housing (102) engages the torsion spring assembly (104), which applies a counteracting force to assist in controlling the door's movement. As the door approaches its closed position, it interacts with the soft-stop buffer pad (106), positioned adjacent to the torsion spring assembly (104) within the hinge housing (102). The soft-stop buffer pad (106) absorbs the door's impact, minimizing noise and wear. Simultaneously, the door aligns with the retractable guide pin (108), which intersects with the torsion spring assembly (104) to maintain precise door alignment. Finally, the retractable guide pin (108) ensures guided door closure, promoting smooth and controlled operation of the door within the system.
In an embodiment, the concealed door hinge apparatus (100) features a hinge housing (102) encasing a torsion spring assembly (104), providing the necessary counteracting force to assist in door movement. The torsion spring assembly (104) works by storing energy when the door is opened and releasing that energy to control the door's closure. This counteracting force helps prevent abrupt or uncontrolled door closure, ensuring smoother and safer operation. Additionally, a soft-stop buffer pad (106) is positioned adjacent to the torsion spring assembly (104) within the hinge housing (102). The soft-stop buffer pad (106) absorbs the impact of the door when it reaches its closed position, thereby reducing noise and wear on the door. The retractable guide pin (108), intersecting the torsion spring assembly (104), provides guided closure by maintaining alignment during door operation. The combination of these elements within the hinge housing (102) contributes to reliable door functionality while minimizing stress on individual components.
In an embodiment, the torsion spring assembly (104) incorporates a variable tension coil, interacting with the retractable guide pin (108) to modulate the counteracting force applied during door movement. The variable tension coil adjusts its resistance based on the position of the door, allowing for more tailored control over the door's motion. When the door is opened or closed, the tension in the coil can vary, accommodating different door weights or user preferences. This adjustable resistance reduces the likelihood of slamming or overly rapid door closure, enhancing safety and durability. The interaction with the retractable guide pin (108) enables a consistent modulation of tension, ensuring the door maintains its guided path without excessive friction or misalignment. The variable tension coil thus allows for improved performance in a wide range of door sizes and applications, offering flexibility in door operation by fine-tuning the resistance exerted by the torsion spring assembly (104).
In an embodiment, the hinge housing (102) includes an integrated alignment slot, which serves to maintain the precise positioning of the retractable guide pin (108). The alignment slot is engineered as a channel within the hinge housing (102) that guides the retractable guide pin (108) along a defined path, ensuring that the door remains properly aligned throughout its movement. The slot minimizes lateral shifting or play in the guide pin, preventing the door from becoming misaligned during repeated use. This feature contributes to smoother door operation by reducing friction between the components and ensuring consistent interaction between the retractable guide pin (108) and the torsion spring assembly (104). The presence of the alignment slot also reduces wear on the mechanical components, as it prevents erratic movement that could cause uneven stress or damage over time. By maintaining precision in the positioning of the retractable guide pin (108), the hinge housing (102) provides enhanced durability and stability for the entire concealed door hinge apparatus (100).
In an embodiment, the retractable guide pin (108) is designed with a tapered end to facilitate smooth insertion into a receiving channel within the hinge housing (102). The tapered end allows for gradual engagement between the retractable guide pin (108) and the receiving channel, minimizing resistance and ensuring a more fluid interaction. This design reduces the potential for jamming or misalignment, particularly during repeated door operation. The gradual taper of the guide pin's end also distributes the force more evenly as the pin engages with the receiving channel, contributing to the longevity of both components by reducing localized stress. Additionally, the tapered end improves the overall stability of the door's movement by maintaining continuous, controlled engagement with the hinge housing (102). This feature enhances the overall reliability of the concealed door hinge apparatus (100), promoting smoother and more consistent door closure while minimizing mechanical wear over time.
In an embodiment, a railway-derived damping insert (110) is positioned within the hinge housing (102), offering additional vibration reduction during door movement. The damping insert (110) draws inspiration from railway technology, where controlling vibration is critical for maintaining structural integrity. This insert is designed to absorb and dissipate vibrations that occur during door opening and closing, preventing them from being transferred to the surrounding frame or other mechanical components. The damping insert (110) is constructed from materials such as rubber or elastomer, known for their excellent shock-absorbing properties. By reducing the amplitude and frequency of vibrations, the damping insert (110) minimizes wear on the hinge housing (102) and other internal components, prolonging the life of the concealed door hinge apparatus (100). The additional vibration reduction also contributes to quieter door operation, which is particularly beneficial in environments where noise control is a priority.
In an embodiment, the concealed door hinge apparatus (100) includes a cam follower, inspired by mechanisms found in railway coaches, to guide the retractable guide pin (108) along a precise path. The cam follower interacts with the torsion spring assembly (104), ensuring that the retractable guide pin (108) moves in a controlled and predictable manner. This precise path helps maintain alignment between the door and the frame, preventing unwanted lateral movement or misalignment that could affect door functionality. The cam follower operates by engaging with a shaped track, controlling the movement of the retractable guide pin (108) as the door is opened or closed. The use of a cam follower enhances the smoothness of the door's motion by providing consistent resistance and eliminating erratic movement. The incorporation of this feature adds an additional layer of control, promoting accurate and stable door operation across a variety of applications.
In an embodiment, the hinge housing (102) is equipped with a detachable cover plate, allowing for easy access to the torsion spring assembly (104) for maintenance or tension adjustments. The cover plate can be removed by loosening screws or disengaging clips, depending on the design, enabling quick and straightforward inspection of the internal components. This feature is particularly useful for environments where regular maintenance is required to ensure optimal performance of the door system. The ability to adjust the tension in the torsion spring assembly (104) allows for customization of the door's resistance based on specific operational requirements. Additionally, the cover plate shields the internal components from external contaminants, such as dust or moisture, when closed, preserving the integrity of the concealed door hinge apparatus (100). The detachable nature of the cover plate simplifies the maintenance process while ensuring that the torsion spring assembly (104) remains protected when not being serviced.
In an embodiment, the soft-stop buffer pad (106) features a multi-layered structure, with each layer varying in density to provide graduated resistance during door closure. The outermost layer, which is typically softer, absorbs initial impact, while progressively denser inner layers provide increasing resistance as the door reaches its fully closed position. This graduated resistance minimizes the force exerted on the door and the frame, preventing damage while also reducing noise during closure. The multi-layered construction allows for a more controlled deceleration of the door, contributing to smoother and quieter operation. Additionally, the varying densities of the layers ensure that the buffer pad (106) can handle different door weights and speeds without sacrificing performance. This layered structure also distributes the impact more evenly, extending the lifespan of both the soft-stop buffer pad (106) and the concealed door hinge apparatus (100) by reducing localized stress points.
In an embodiment, the retractable guide pin (108) incorporates a biasing spring to maintain consistent engagement with the hinge housing (102) during door movement. The biasing spring applies a constant force to the retractable guide pin (108), ensuring that it remains properly aligned and engaged with the housing as the door opens and closes. This continuous engagement prevents the guide pin from becoming dislodged or misaligned, even after extended use. The biasing spring is calibrated to provide the optimal level of tension, keeping the guide pin in position without exerting excessive force that could cause unnecessary wear. The inclusion of the biasing spring improves the overall reliability of the concealed door hinge apparatus (100), as it helps maintain the integrity of the mechanical connections over time. By ensuring consistent engagement, the biasing spring contributes to smooth, controlled door operation.
In an embodiment, the torsion spring assembly (104) is calibrated with a preload setting, aligned with the hinge housing (102) to provide initial tension that improves the responsiveness of door movement. The preload setting refers to the pre-application of tension to the torsion spring assembly (104) before the door begins to move, allowing for immediate resistance when the door is opened or closed. This initial tension helps control the speed and force of the door's motion, preventing abrupt movements that could lead to wear or damage. The preload setting can be adjusted based on the weight and size of the door, ensuring that the torsion spring assembly (104) provides the appropr












I/We Claims


A concealed door hinge apparatus (100), comprising:
a hinge housing (102) encasing a torsion spring assembly (104) for applying counteracting force;
a soft-stop buffer pad (106) positioned adjacently within said hinge housing (102) to absorb door impact;
and a retractable guide pin (108) intersecting the torsion spring assembly (104) for guided door closure.
The concealed door hinge apparatus (100) of claim 1, wherein the torsion spring assembly (104) comprises a variable tension coil, intersecting with the retractable guide pin (108) to modulate the counteracting force, allowing for adjustable resistance during door movement.
The concealed door hinge apparatus (100) of claim 1, wherein the hinge housing (102) features an integrated alignment slot to maintain precise positioning of the retractable guide pin (108).
The concealed door hinge apparatus (100) of claim 1, wherein the retractable guide pin (108) is fitted with a tapered end to facilitate smooth insertion into a receiving channel within the hinge housing (102).
The concealed door hinge apparatus (100) of claim 1, further comprising a railway-derived damping insert (110) positioned within the hinge housing (102), said damping insert provides additional vibration reduction during door movement.
The concealed door hinge apparatus (100) of claim 1, further including a cam follower inspired by railway coach mechanisms, intersecting with the torsion spring assembly (104) to guide the retractable guide pin (108) in a precise path.
The concealed door hinge apparatus (100) of claim 1, wherein the hinge housing (102) is equipped with a detachable cover plate, allowing access to the torsion spring assembly (104) for maintenance or tension adjustment.
The concealed door hinge apparatus (100) of claim 1, wherein the soft-stop buffer pad (106) comprises a multi-layered structure, each layer with varying density, to provide graduated resistance during door closure.
The concealed door hinge apparatus (100) of claim 1, wherein the retractable guide pin (108) incorporates a biasing spring to maintain the engagement with the hinge housing (102).
The concealed door hinge apparatus (100) of claim 1, wherein the torsion spring assembly (104) is calibrated with a preload setting, aligned with the hinge housing (102) to provide initial tension, improving the responsiveness of door movement and ensuring reliable operation.




The present disclosure discloses a concealed door hinge apparatus comprising a hinge housing encasing a torsion spring assembly to apply counteracting force. A soft-stop buffer pad is positioned adjacently within the hinge housing to absorb door impact. A retractable guide pin intersects the torsion spring assembly to provide guided door closure.

, Claims:I/We Claims


A concealed door hinge apparatus (100), comprising:
a hinge housing (102) encasing a torsion spring assembly (104) for applying counteracting force;
a soft-stop buffer pad (106) positioned adjacently within said hinge housing (102) to absorb door impact;
and a retractable guide pin (108) intersecting the torsion spring assembly (104) for guided door closure.
The concealed door hinge apparatus (100) of claim 1, wherein the torsion spring assembly (104) comprises a variable tension coil, intersecting with the retractable guide pin (108) to modulate the counteracting force, allowing for adjustable resistance during door movement.
The concealed door hinge apparatus (100) of claim 1, wherein the hinge housing (102) features an integrated alignment slot to maintain precise positioning of the retractable guide pin (108).
The concealed door hinge apparatus (100) of claim 1, wherein the retractable guide pin (108) is fitted with a tapered end to facilitate smooth insertion into a receiving channel within the hinge housing (102).
The concealed door hinge apparatus (100) of claim 1, further comprising a railway-derived damping insert (110) positioned within the hinge housing (102), said damping insert provides additional vibration reduction during door movement.
The concealed door hinge apparatus (100) of claim 1, further including a cam follower inspired by railway coach mechanisms, intersecting with the torsion spring assembly (104) to guide the retractable guide pin (108) in a precise path.
The concealed door hinge apparatus (100) of claim 1, wherein the hinge housing (102) is equipped with a detachable cover plate, allowing access to the torsion spring assembly (104) for maintenance or tension adjustment.
The concealed door hinge apparatus (100) of claim 1, wherein the soft-stop buffer pad (106) comprises a multi-layered structure, each layer with varying density, to provide graduated resistance during door closure.
The concealed door hinge apparatus (100) of claim 1, wherein the retractable guide pin (108) incorporates a biasing spring to maintain the engagement with the hinge housing (102).
The concealed door hinge apparatus (100) of claim 1, wherein the torsion spring assembly (104) is calibrated with a preload setting, aligned with the hinge housing (102) to provide initial tension, improving the responsiveness of door movement and ensuring reliable operation.

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