Firearm Bolt Action With Conical Seating And Horizontal Recoil Lugs
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Solution Overview
Problem
Existing bolt actions for firearms face issues with maintaining precise concentricity of the bolt and firing pin, leading to inaccurate firing due to rear bolt lift and vibrations, which are exacerbated by angled sear engagements and inadequate recoil energy absorption.
Innovation Solution
The bolt action employs forward and rear conical seating surfaces for precise positioning, a cocking piece design that prevents rear bolt lift, angularly spaced action screws for a stronger bond with the stock, and horizontally aligned recoil lug surfaces to absorb recoil energy effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If angled sear engagements are used in the trigger system, then the cocking piece can be actuated, but rear bolt lift occurs causing loss of bolt concentricity
Solution Approach 1:
The patent inverts the traditional sear engagement geometry by using a horizontal sear face instead of an angled face. This reversal prevents the cocking piece from riding up during actuation, eliminating rear bolt lift while maintaining operational functionality. The horizontal engagement surface allows the cocking piece to be actuated without generating upward force on the bolt.
2Strength
If conventional action screws are used to secure the receiver body, then the receiver can be attached to the stock, but undesirable vibrations occur during firing
Solution Approach 1:
The patent transitions from conventional vertical action screws to angularly spaced action screws that extend at an angle relative to the receiver body's longitudinal axis. This dimensional change in screw orientation creates a more distributed and rigid attachment pattern, strengthening the receiver-stock bond while dampening vibration harmonics through the angular distribution of fastening points.
3Force
If recoil lugs are positioned at the bottom of the receiver body, then recoil energy can be absorbed, but accuracy is reduced due to improper energy transfer
Solution Approach 1:
The patent changes the positional parameter of the recoil lugs from the bottom of the receiver body to the rear portion of the receiver, horizontally aligned with the barrel's centerline. This parameter change optimizes the recoil energy transfer path to be collinear with the bore axis, improving firing accuracy while maintaining effective recoil absorption through the receiver's mass.
4Power
If the bolt mechanism is designed for high-powered rifles, then powerful firing capability is achieved, but enormous stress is subjected to the bolt mechanism
Solution Approach 1:
The patent employs conical seating surfaces with precise angles (approximately 60 degrees) at both the forward and rear portions of the receiver body. These curved conical surfaces distribute the enormous firing stress evenly across the bolt locking lugs and receiver interfaces, preventing stress concentration and enhancing the durability of the bolt mechanism under high-powered firing conditions.
Data Source
AI summary
A bolt action for a firearm includes a receiver body having forward and rear apertures connected by a central bore therethrough, and having a plurality of forward and rear conical seat surfaces proximate the forward and rear apertures. The bolt action further includes a generally cylindrical bolt body having forward and rear ends, a plurality of locking lugs disposed on a forward end thereof for engaging the forward conical surfaces of the receiver body and a floating bolt handle for engaging the rear conical surfaces of the receiver body when the bolt handle is rotated.