Upper Receiver Bolt Biasing Member for Recoil Reduction
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Solution Overview
Problem
Conventional AR-15 type firearms experience recoil due to the bolt carrier transitioning from a forward to a backward position after firing, which can be uncomfortable for users.
Innovation Solution
Incorporating a displaceable biasing member and a locking wedge in the upper receiver to control the transition of the bolt between forward and backward states, utilizing a buffer and buffer spring to manage recoil forces, and a buffer actuator to facilitate manual operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bolt carrier transitions from forward to backward position after firing, then the cartridge casing can be ejected, but the user experiences recoil which is uncomfortable
Solution Approach 1:
The patent introduces a biasing member (spring) that is pre-loaded to provide a cushioning force during the bolt carrier's rearward transition. The biasing member is positioned to engage with the bolt carrier and gradually apply opposing force as the bolt moves backward, cushioning the recoil impulse before it reaches the user's shoulder or hand.
Solution Approach 2:
The biasing member acts as an intermediary element between the bolt carrier and the user. Instead of the bolt carrier directly transmitting recoil force to the user, the biasing member intervenes to modify and soften the force transmission, converting the sharp recoil impulse into a more gradual force application.
2Force
If a displaceable biasing member and locking wedge are incorporated to control bolt transition, then recoil is reduced, but the device complexity increases
Solution Approach 1:
The patent combines the biasing member and locking wedge into an integrated assembly within the upper receiver. The locking wedge works in conjunction with the biasing member to control the bolt carrier's movement, merging multiple functions (biasing, locking, and controlled displacement) into a unified mechanism that reduces overall system complexity despite adding components.
Solution Approach 2:
The biasing member is designed as a displaceable element that dynamically adjusts its position and force application based on the bolt carrier's movement. The locking wedge provides a controlled displacement mechanism that allows the biasing member to move progressively, creating a dynamic recoil management system rather than a static one.
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
Reduces recoil by managing the bolt's transition with controlled force application, enhancing user comfort and operational efficiency.
Implementation Method 1
The at least one displaceable biasing member is configured to bias the bolt in a forward state when the at least one biasing member is in an initial state
Implementation Method 2
the firearm can include a buffer spring, wherein the buffer spring bias the buffer in a forward position when the buffer spring is in a non-compressed state
Data Source
AI summary
A firearm is disclosed. The firearm can include an upper receiver that includes a bolt. The bolt can include at least one displaceable biasing member that is configured to bias the bolt in a forward state when the at least one biasing member is in an initial state. The bolt can also include a locking wedge that is configured to bias the at least one displaceable biasing member in the initial state. The at least one displaceable biasing member is configured to be displaced from the initial state to a displaced state when a sufficient amount of force is exerted on the at least one displaceable biasing member from the bolt so that the bolt can transition from the forward state to a backward state.