Scissor-Style Bolt Action for Firearm Accuracy
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Solution Overview
Problem
Conventional rifle designs, such as the Ruger 10/22, do not allow the bolt to remain stationary upon firing, requiring user movement to actuate the toggle handle for cartridge ejection and reloading, which can be inconvenient and affect accuracy and muzzle velocity.
Innovation Solution
An improved bolt assembly with a stud, front and rear levers, a toggle handle, and a top rail with channel guides is introduced, allowing the bolt to remain stationary until manually actuated, enabling efficient ejection and reloading through a scissor-style bolt action mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional rifle design is used, then the bolt moves automatically after firing, but the user must manually actuate the toggle handle which requires substantial user movement and affects accuracy
Solution Approach 1:
The bolt action mechanism transitions from a static post-firing state to a dynamic scissor-style lever system that enables controlled movement. The front lever and rear lever form a scissor mechanism that converts small user inputs into controlled bolt movement, allowing the bolt to remain stationary during firing then move precisely when actuated by the toggle handle.
Solution Approach 2:
The bolt action is divided into separate functional components: the front lever connected to the bolt, the rear lever connected to the toggle handle, and the top rail with channel guides. This segmentation allows each component to perform its specific function independently, with the bolt remaining stationary until the scissor mechanism is actuated to eject the cartridge and load the next one.
2Measurement precision
If the bolt remains stationary after firing, then accuracy and muzzle velocity are improved, but the mechanism becomes more complex requiring additional levers and guides
Solution Approach 1:
The scissor-style lever mechanism serves multiple functions: it controls bolt movement, ejects spent cartridges, and prepares the bolt for the next firing cycle. The top rail with channel guides simultaneously constrains bolt movement and provides attachment points for the levers, reducing the need for separate components and minimizing overall complexity despite the added functionality.
3Measurement precision
If manual actuation of toggle handle is required, then bolt position is maintained during firing, but the operation becomes more time-consuming
Solution Approach 1:
The scissor-style lever mechanism converts small, quick user movements into rapid and controlled bolt action sequences. When the user actuates the toggle handle, the scissor mechanism amplifies this input motion to quickly eject the cartridge and load the next one, minimizing the time required for these operations while maintaining bolt stability during firing.
Data Source
AI summary
The disclosed apparatus is a scissor-style action to be mounted to a firearm. In one embodiment the firearm is a semi-automatic firearm prior to removal of the stock action and attachment of the disclosed action. In one particular embodiment, the firearm is a rifle sold by the Ruger® company under the model name 10/22.