Bolt Stop Assembly Pivot Pin Orientation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional bolt stops for bolt action firearms are prone to snagging and difficult to operate, and their perpendicular pivot pin configuration is susceptible to shear forces, which can lead to failure and make it challenging to securely insert or remove the bolt from the receiver.
Innovation Solution
The bolt stop assembly features an actuating bolt stop that rotates about a pivot pin parallel to the receiver's longitudinal axis, allowing forces to be transmitted to the receiver rather than the pin, and is configured to sit flush with the receiver's exterior, preventing accidental activation and snagging. It includes a series of lugs that engage with the bolt to prevent rearward movement and a spring-loaded mechanism to secure the bolt in place, allowing easy insertion and removal by rotating between open and closed positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bolt stop protrudes from the side of the receiver and is attached with a pin perpendicular to the longitudinal axis, then the bolt stop can prevent the bolt from being completely removed, but the pivot pin is susceptible to shear forces leading to failure and the bolt stop easily snags on objects
Solution Approach 1:
The patent inverts the conventional perpendicular pin configuration by using a pin parallel to the longitudinal axis of the receiver. This inversion changes the force distribution so that operational forces are transmitted to the receiver body rather than the pin, eliminating shear forces on the pin and preventing failure while reducing snagging.
2Reliability
If the bolt stop protrudes from the receiver, then it can stop the bolt, but it becomes difficult to operate when inserting or removing the bolt and easily snags on objects
Solution Approach 1:
The patent transitions the bolt stop from a protruding configuration to a flush-mounted configuration where the stop sits within a recess in the receiver. This dimensional change allows the bolt to be inserted and removed along the longitudinal axis without obstruction, eliminating snagging while maintaining the stopping function through the recess geometry.
3Reliability
If the bolt stop protrudes from the receiver, then it can prevent bolt removal, but it creates a larger profile that is prone to accidental activation and snagging
Solution Approach 1:
The patent nests the bolt stop within a recess in the receiver rather than having it protrude outward. This nesting approach maintains the security function by providing a physical barrier within the recess while eliminating the protruding profile that causes snagging and accidental activation, creating a cleaner overall receiver shape.
Data Source
AI summary
A bolt stop assembly is disclosed herein. The bolt stop assembly may include a receiver and a bolt. The receiver may include a plurality of channels extending longitudinally to a firearm barrel. The bolt may include a series of lugs on a distal end of the bolt configured to traverse the plurality of channels. The bolt stop assembly may include an aperture adjacent to the breech end of the receiver, and an actuating bolt stop set within the aperture. The actuating bolt stop actuates around a pivot pin within a pin hole set parallel to a longitudinal axis. The actuating bolt stop may include an interior surface where a biasing member is disposed between the interior surface and the receiver.