Weld-Free Chute Door Assembly with External Automatic Closer
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Solution Overview
Problem
Current chute door designs face challenges in meeting safety and fire codes due to complex linkage systems that occupy space, require difficult maintenance, and are prone to contamination, while also being costly and aesthetically compromised by field modifications.
Innovation Solution
A door assembly with an external mounting frame and direct-acting automatic closer, featuring a separate mounting frame and finish frame, slotted holes for adjustments, and a deflector plate to reduce debris accumulation, allowing for easy installation and maintenance without narrowing the chute opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex linkage systems are used to meet safety requirements and maximize door opening angle, then the door can achieve automatic closing and locking functions, but the device complexity increases and the usable chute opening area is reduced
Solution Approach 1:
The patent removes the complex linkage system entirely from the door assembly. Instead of using linkages mounted inside the chute or on the door frame, the invention employs a simple hinge connection that allows the door to swing open while maintaining automatic closing capability through the door's own weight and hinge design. This extraction of the linkage system eliminates the complexity while preserving the essential automatic closing function.
Solution Approach 2:
Rather than mounting the closing mechanism inside the chute and having it push the door shut, the patent inverts the approach by allowing the door to close under its own weight through a simple hinge. The hinge is designed to permit automatic closing without requiring an active pushing mechanism, thereby simplifying the overall system while maintaining reliability.
2Reliability
If linkage and closer assemblies are mounted inside the chute or on the frame, then automatic closing function is achieved, but the usable chute opening area is reduced and maintenance becomes difficult
Solution Approach 1:
The patent extracts the closer assembly from the chute interior and frame mounting locations. Instead, the door utilizes a simple hinge mechanism that allows automatic closing without requiring space-consuming assemblies mounted inside the chute or on the frame. This increases the usable chute opening area while maintaining the automatic closing function through the hinge design.
3Adaptability or versatility
If field modifications and custom fits are performed to accommodate construction variations, then the door can be installed in rough openings, but installation time and cost increase and aesthetic appearance is compromised
Solution Approach 1:
The patent divides the door assembly into separate, modular components including the door panel, hinge assembly, and frame elements. This segmentation allows each component to be independently adjusted or modified during installation to accommodate construction variations in the rough opening, eliminating the need for extensive field modifications to the door itself while maintaining aesthetic appearance.
Solution Approach 2:
The hinge assembly incorporates adjustable mounting positions and flexible connection points that can be dynamically repositioned during installation to accommodate variations in the rough opening dimensions and alignment. This dynamic adjustability allows the door to fit properly without requiring custom field modifications, reducing installation time and preserving aesthetic appearance.
4Reliability
If the closer assembly is fixedly mounted to a structure inside the chute, then automatic closing is achieved, but maintenance and replacement become difficult requiring removal of the entire door assembly
Solution Approach 1:
The patent removes the closer assembly from the fixed mounting position inside the chute. Instead, the system uses a simple hinge mechanism that inherently provides automatic closing functionality without requiring a separately mounted closer assembly. This eliminates the maintenance difficulty associated with accessing and replacing fixed-mounted closers, as the hinge can be easily accessed and serviced without removing the entire door assembly.
Data Source
AI summary
A door assembly for a chute system comprising a door pivotally connected to a frame assembly mountable around an opening in a chute system. The door is manufactured from stainless steel and is free of welds. The door includes an automatic closer mounted to its interior surface and being directly connected to the frame assembly at one end and to the door at the other end. When the door is opened, the closer moves with the door out of the opening to the chute system, thereby increasing the usable space for inserting articles into the chute. The closer does not intrude into the interior of the chute when the door is in a closed position. The door may also include a deflector plate mounted proximate the door hinge to protect the hinge and prevent debris from articles inserted into the chute from dropping into the gap between the door and frame and interfering with the action of the hinge.