Adjustable Door Stop Using Interlocking Hinge Pin Caps
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Solution Overview
Problem
Existing door stop systems often damage hollow core doors and adjacent walls due to continuous pressure, and they may not be easily adaptable to various hinge mounted doors without modifying the hinges.
Innovation Solution
An adjustable door stop system featuring a hinge pin with a cylindrical barrel and a mechanism using interlocking teeth on caps to prevent axial movement, allowing the door to be stopped at a selected position without touching the door or wall, thus preventing damage. The system includes a hinge pin cap and control cap with teeth that engage to arrest door movement, and a radially enlarged bottom end for secure installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a padded post is used to stop door movement, then the door movement is controlled, but continuous pressure damages the hollow core door
Solution Approach 1:
The patent introduces an intermediary mechanism consisting of a hinge pin cap with teeth and a control cap with corresponding teeth. This intermediary system engages with the hinge pin to control door movement without requiring continuous pressure against the door itself, thereby preventing damage to the hollow core door while maintaining ease of operation.
Solution Approach 2:
The patent replaces the traditional mechanical system of a padded post applying continuous pressure with a toothed cap mechanism that uses engagement and disengagement of teeth to control door movement. This substitution eliminates the need for continuous pressure application, thereby preventing damage to the door while maintaining control functionality.
2Ease of operation
If a hinge pin with caps is used to control door movement, then the door can be stopped at a selected position, but the system becomes more complex
Solution Approach 1:
The patent segments the hinge mechanism into distinct functional components: a hinge pin with a cylindrical barrel, a hinge pin cap with teeth, and a control cap with teeth. This segmentation allows each component to perform its specific function independently, making the overall system easier to manufacture, assemble, and adjust while maintaining precise door position control capability.
3Ease of operation
If a door stop system is added to existing doors, then door movement is controlled, but the system may not be adaptable to various hinge mounted doors
Solution Approach 1:
The patent designs the hinge pin cap and control cap with universal features that allow the system to be adapted to various hinge mounted doors. The cylindrical barrel of the hinge pin and the toothed cap mechanism can be configured to work with different door types and hinge arrangements, providing both door movement control and adaptability to existing door installations.
Data Source
AI summary
An adjustable door stop system. The system includes a hinge pin having an axis about which the hinge leaves rotate, a top end, and an opposed bottom end. In one embodiment, a hinge pin cap has a first portion extending radially from the top end of the hinge pin and a second cylindrical portion extending from the first portion parallel to the access of the hinge pin. A control cap has an opening to receive the hinge pin therethrough, the control cap having a radially extending first portion and a cylindrical second portion substantially parallel to the axis of the hinge pin. A mechanism is provided to prevent movement of the hinge pin cap with respect to the control cap including a plurality of teeth on the control cap second cylindrical portion and a plurality of teeth of the control cap cylindrical portion which mate with each other.