Firearm Bolt-Action Spring Biasing for Open Position Stability
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Solution Overview
Problem
Bolt-action firearms often require minimal force to cycle, leading to inadvertent movement of the bolt from the open position, potentially causing accidental loading when the firearm is jostled or tilted, compromising safety during transport or storage.
Innovation Solution
A bolt-action mechanism that includes a means to bias the bolt away from the breech end of the receiver, utilizing a spring under compression or other mechanical devices to maintain the bolt in an open position securely, preventing unintended movement and ensuring safe handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bolt is designed to require minimal force to cycle, then ease of operation is improved, but reliability deteriorates due to inadvertent movement from the open position
Solution Approach 1:
The patent applies a spring mechanism that acts as a counterbalancing force to offset the bolt's weight and prevent inadvertent movement. The spring is configured to engage with the bolt and apply a restraining force that counteracts gravitational pull and external disturbances, thereby maintaining bolt position stability without requiring excessive cycling force.
Solution Approach 2:
The spring mechanism is pre-configured to apply a restraining force on the bolt before any inadvertent movement occurs. This preliminary anti-action prevents the bolt from moving out of position due to jostling or tilting, addressing the reliability issue before it manifests during transport or storage.
2Reliability
If the bolt is held firmly in the open position to prevent inadvertent cycling, then reliability is improved, but ease of operation deteriorates due to increased force required to cycle the bolt
Solution Approach 1:
The spring mechanism is designed with dynamic characteristics that allow it to provide strong restraining force when the bolt is stationary in the open position, yet yield smoothly during intentional cycling. The spring's elastic properties enable it to absorb and release energy dynamically, providing stability at rest while facilitating controlled movement during operation.
Solution Approach 2:
The spring force characteristics are optimized to change based on bolt position and movement state. The spring provides maximum restraining force when the bolt is held stationary to prevent inadvertent cycling, but allows the force to be overcome during deliberate cycling operations, effectively changing the force parameter between operational states.
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
The solution effectively reduces the likelihood of the bolt inadvertently cycling, enhancing the safety and reliability of the firearm by maintaining the bolt in a secure open position, even when the firearm is subjected to jostling or tilting, thereby preventing accidental loading.
Implementation Method 1
A spring under compression is operably engaged with the bolt to bias the bolt away from the breech end of the receiver
Data Source
AI summary
A bolt-action for a firearm includes a receiver that defines a chamber having a longitudinal axis and a breech end of the receiver. A bolt is at least partially inside the chamber and slidingly engaged with the receiver. The bolt has a locked position that prevents movement of the bolt parallel to the longitudinal axis of the chamber and an unlocked position that allows movement of the bolt parallel to the longitudinal axis of the chamber. A spring under compression is operably engaged with the bolt to bias the bolt away from the breech end of the receiver.