Ambidextrous Bolt Release Mechanism With Cam-Actuated Plunger
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Solution Overview
Problem
Existing bolt catches in auto-loading firearms lack ambidextrous operation, which complicates reloading and can hinder ergonomic and reliable operation, especially for shooters with a non-dominant hand.
Innovation Solution
An ambidextrous bolt release mechanism featuring a bolt catch lever and a spring-biased actuator plunger, allowing operation from either side of the firearm, with a camming surface and ramp interface for ergonomic and efficient reloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional single-side bolt catch lever is used, then the mechanism is mechanically simple, but it lacks ambidextrous operation capability
Solution Approach 1:
The bolt catch mechanism is segmented into two separate components: a bolt catch lever for one-handed operation and a plunger for ambidextrous operation. This segmentation allows each component to be optimized for its specific function while together they provide both simplicity and ambidextrous capability.
Solution Approach 2:
The plunger acts as an intermediary component that transfers force from the opposite side of the firearm to the bolt catch lever. This intermediary mechanism enables ambidextrous operation without requiring a complete redesign of the entire bolt catch system.
2Ease of operation
If a bolt catch lever is positioned on one side only, then the structure is simple, but it hinders ergonomic operation for non-dominant hand shooters
Solution Approach 1:
The ambidextrous capability is achieved by adding operation from another dimension - the plunger provides operation from the opposite side of the firearm, perpendicular to the bolt catch lever's side. This dimensional addition enables non-dominant hand shooters to operate the bolt catch ergonomically without complicating the overall structure.
3Reliability
If the plunger is spring-biased, then automatic return to safe position is achieved, but additional components increase complexity
Solution Approach 1:
The spring-biased plunger is self-service in that it automatically returns to its safe position after being actuated, without requiring manual intervention or additional control mechanisms. This self-returning capability enhances reliability while adding only a single spring component.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy and efficient reloading from either side, enhancing operational reliability and usability for both left- and right-handed shooters, particularly in competitive shooting scenarios.
Implementation Method 1
a spring-biased actuator plunger accessible from the opposite side of the firearm
Implementation Method 2
the bolt catch lever in one embodiment includes an inclined camming ramp which forms an operating surface that is in turn acted upon by a complementary angled inclined camming surface defined by a working end of the actuator plunger
Implementation Method 3
the inclined camming surface of the actuator plunger acts as a wedge that pries and rotates the bolt catch lever out of engagement with the bolt
Data Source
AI summary
A firearm with ambidextrous bolt release mechanism includes a barrel and a bolt slideably mounted in the receiver for axial movement between forward closed breech position in battery with the barrel and a rearward open breech position. A recoil spring biases the bolt forward. A side-mounted bolt catch lever is configured and operable to selectively hold the bolt in the open breech position, and disengage the bolt to reclose the breech when manually actuated. A transversely movable actuator plunger allows a user to release the bolt from the side of the firearm opposite the bolt catch lever side. The plunger comprises an inclined camming surface which slideably engages a mating inclined camming ramp on the lever. Wedging action applied to the bolt catch lever by the plunger rotates the lever about its pivot axis to disengage and release the bolt.