Straight-Pull Repeating Rifle with Switchable Pump Operation
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Solution Overview
Problem
Existing repeating rifles with bolt handles and thumbhole stocks are ergonomically cumbersome and time-consuming for rapid follow-up shots, while pump action repeaters require lifting the weapon for repetition, and semi-automatic rifles are unreliable and limited by ammunition dependence.
Innovation Solution
A repeating rifle with a toolless switching mechanism between operation via the forestock and bolt handle, using an actuating handle for versatile and ergonomic use, allowing fast and intuitive mode switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bolt handle with manual rotary motion is used for repeating, then the breechblock can be securely locked and cartridges can be fed, but the operation becomes time-consuming and too slow for rapid follow-up shots
Solution Approach 1:
The patent inverts the traditional rotary motion of the bolt handle into linear reciprocating motion. The bolt handle moves back and forth in a straight line along the longitudinal axis of the firearm, pushing and pulling the breechblock directly, rather than rotating to engage lugs. This inversion maintains secure locking through the locking lugs engaging with the locking surface during linear motion, while dramatically increasing the speed of operation for rapid follow-up shots.
2Ease of operation
If a thumbhole stock is used for relaxed firing position, then ergonomics are improved, but the removal and insertion of the thumb becomes cumbersome for rapid repeating
Solution Approach 1:
The patent eliminates the need to remove the thumb from the thumbhole by inverting the repeating mechanism from rotary to linear. The shooter can keep their thumb inserted in the thumbhole for support and ergonomics while the bolt handle, operated by the index finger or other fingers, moves linearly to cycle the action. This resolves the conflict between maintaining a relaxed firing position with thumbhole stock and achieving rapid repeating speed.
3Productivity
If pump action repeater is used for rapid consecutive shots, then both hands can remain on the firearm, but the weapon must be lifted for repetition when shooting from stand or prone position
Solution Approach 1:
The patent creates a universal repeating mechanism that combines the advantages of both bolt action and pump action. The linear reciprocating motion of the bolt handle can be operated from the front (like pump action) allowing both hands on the firearm for rapid consecutive shots, or from the rear (like bolt action) maintaining firing position stability when shooting from stand or prone position. This multi-functional design allows the shooter to adapt the operation mode to the specific hunting or shooting situation.
4Productivity
If semi-automatic rifle is used for rapid repeating, then automatic cycling is achieved, but reliability is reduced and ammunition dependence increases
Solution Approach 1:
The patent creates a manually-operated self-service repeating mechanism that does not depend on ammunition energy or complex automatic cycling systems. The linear reciprocating motion of the bolt handle directly cycles the breechblock, extractor, and feeder mechanisms without requiring gas systems, recoil operations, or spring-loaded automatic cycling. This simple, direct mechanical connection provides reliability comparable to bolt action while achieving pump-action-like speed, and eliminates dependence on specific ammunition types or conditions.
Data Source
AI summary
The invention relates to a repeating firearm, in particular a repeating rifle, which is configured as a straight-pull bolt action rifle, comprising a forestock and a bolt handle. The repeating firearm is selectively operable either with the forestock or with the bolt handle.