Pull handle assembly and door cover
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Solution Overview
Problem
Existing flush pull door handles are limited as they are physically molded into doors, making them difficult to remove or replace without dismantling the door, and require concurrent manufacturing with the door, which poses safety concerns by allowing doors to be improperly secured with chains or other means.
Innovation Solution
A door pull assembly with an external mounting brace that can be affixed to a fully fabricated door, featuring a cavity with fastener mating elements, allowing for secure installation and removal without internal door modifications, and including a pull assembly with a handle that fits within the mounting assembly for easy access and secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flush pull handles are physically molded into doors, then the handles provide safety by preventing chain entrapment, but the handles cannot be removed or replaced without dismantling the door
Solution Approach 1:
The door handle system is divided into separate components: a mounting plate that attaches to the door and a handle assembly that mounts to the mounting plate. This segmentation allows the handle to be removed and replaced independently from the door structure, while the mounting plate remains fixed to maintain safety functionality.
Solution Approach 2:
The handle assembly is extracted as a separate removable component from the door structure. The mounting plate remains affixed to the door to maintain the safety function, while the handle itself can be easily removed and replaced without affecting the door or the mounting mechanism.
2Stability of the object's composition
If flush pull handles are molded into doors during manufacturing, then the handles are securely integrated, but the door and handle must be manufactured concurrently, reducing flexibility
Solution Approach 1:
The system separates the permanent mounting component from the replaceable handle component, allowing the mounting plate to be installed during door manufacturing while the handle can be added, removed, or replaced at any time independently.
Solution Approach 2:
The handle assembly is designed to be dynamically replaceable while the mounting plate remains statically fixed to the door. This allows the system to adapt to different handle styles or repairs without requiring door replacement or complex reinstallation.
3Ease of operation
If outwardly extending door handles are used, then the handles are easy to grasp and operate, but they provide hooking mechanisms that allow chains to prevent doors from being opened
Solution Approach 1:
The design converts the potential harm of protruding handles being used for chain entrapment into a benefit by creating a flush-mounted handle that eliminates the protrusion. The handle still provides adequate grip surface area while the flush mounting prevents chains from being hooked onto it, thus converting the structural constraint into a safety feature.
Solution Approach 2:
Instead of having the handle extend outward from the door surface, the handle is inverted to be mounted flush with the door surface. This inversion maintains the handle's operational functionality while eliminating the geometric feature that allows chain entrapment.
4Reliability
If existing doors are modified to install flush pull handles, then safety is improved, but the door structure must be altered, increasing complexity
Solution Approach 1:
The mounting plate is designed as a self-contained component that attaches to the door using standard drilling and fastening procedures, separate from the handle assembly. This segmentation allows installers to mount the plate first, then attach the handle, simplifying the overall installation process while maintaining safety functionality.
Solution Approach 2:
The mounting plate serves as an intermediary component between the door and the handle assembly. It provides a standardized interface that simplifies installation by decoupling the door modification requirements from the handle installation, allowing the handle to be mounted without complex door alterations.
Data Source
AI summary
The present invention provides a door pull assembly including an external mounting brace, a securing means to affix the brace to a door, a mounting assembly mounted with the brace, and a pull assembly mountable within the mounting assembly. The external mounting brace includes a front face and a rear wall, the rear wall securable against an interior portion of the door and a plurality of interior walls defining an enclosed cavity. The mounting assembly affixable within the enclosed cavity and including at least one fastener engaging with the fastener mating element within the external mounting brace. The pull assembly mountable in an interior space of the mounting assembly.