Rotatable Hammer Spur for Concealed Carry Handguns
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Solution Overview
Problem
Concealed carry handguns with traditional hammer spurs often experience obstructions and safety issues due to the spur contacting clothing, leading to potential inadvertent cocking and snagging, compromising comfort and safety during carry.
Innovation Solution
A rotatable and removable hammer spur design that rotates at least 90 degrees to position the spur perpendicular to its normal firing position, reducing obstructions and incorporating a bias spring mechanism for secure retention in the firing position, allowing for easy insertion and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional hammer spur is used on concealed carry handguns, then the spur can be engaged by the shooter's thumb for cocking, but the spur contacts clothing and causes obstructions and snags during concealed carry
Solution Approach 1:
The spur is made rotatable relative to the hammer body, allowing it to change orientation dynamically. The spur can be rotated to different angular positions (including perpendicular to the hammer axis) to adapt between cocking operations and concealed carry conditions, eliminating continuous clothing contact while preserving thumb engagement capability when needed
2Ease of operation
If the spur protrudes perpendicular to the hammer body for easy thumb engagement, then cocking is facilitated, but inadvertent cocking may occur from clothing contact
Solution Approach 1:
The rotatable spur allows the user to dynamically adjust its orientation. During concealed carry, the spur can be positioned perpendicular to the hammer axis where clothing contact is minimized, reducing the risk of inadvertent cocking. When cocking is intended, the user can rotate the spur back to its functional position for reliable thumb engagement
Solution Approach 2:
The rotation mechanism provides tactile feedback to the user about the spur's position relative to the hammer body. This allows the user to consciously position the spur in a safe orientation during carry and deliberately return it to the cocking position when needed, creating awareness that prevents accidental cocking
3Reliability
If the spur is made rotatable to eliminate clothing contact, then concealed carry safety is improved, but the mechanism complexity increases
Solution Approach 1:
The spur is separated from the hammer body as a distinct, rotatable component rather than being fixed. This segmentation allows independent movement of the spur relative to the hammer, enabling the safety function without requiring complex integration into the overall hammer structure
Solution Approach 2:
A simple rotation mechanism serves as an intermediary between the fixed hammer body and the movable spur. This intermediary element enables the spur to achieve safe orientations while maintaining a direct mechanical connection to the hammer, avoiding the need for completely separate systems
Data Source
AI summary
A rotatable spur for a handgun, rotatable with respect to the hammer body, and rotatable in a direction that is about an axis of rotation approximately parallel with the handgun body and barrel. The mechanism of rotation may be varied provided the spur is capable of changing the direction of its finger grip surface from its normal firing position to a position preferably perpendicular to the normal firing position. A retaining pin, biased for retention within an indentation within a cocking spur pin allows the finger grip surface of the spur to rotate and face at least a side position of the handgun.