Firearm Takedown Bar Sear Rotation Mechanism
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Solution Overview
Problem
Striker fired pistols require trigger pull for disassembly, posing a safety risk if a loaded chamber is inadvertently left, as it engages the striker, potentially leading to accidental discharge.
Innovation Solution
A takedown mechanism that allows disassembly without pulling the trigger by using a takedown bar to rotate the sear out of the striker's path, ensuring the slide can be removed without engaging the striker, and includes a spring and pin system to bias the takedown bar, enabling safe disassembly by aligning the slide with a disassembly notch and removing the slide stop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the trigger is pulled to release the striker from the sear for disassembly, then the striker is released from the sear, but the risk of accidental discharge increases if a loaded chamber is inadvertently left
Solution Approach 1:
The invention divides the disassembly process into two separate actions: (1) moving the slide rearward to dissipate striker energy and check the chamber, and (2) using a dedicated takedown safety lever to rotate the sear out of the striker's path. This segmentation eliminates the need to pull the trigger during disassembly, thereby resolving the contradiction between ease of operation and safety.
Solution Approach 2:
The takedown safety lever acts as an intermediary mechanism between the user's intent to disassemble and the actual release of the striker. By using this intermediate component to rotate the sear rather than directly pulling the trigger, the system achieves disassembly without triggering the firing mechanism, thus eliminating accidental discharge risk.
2Reliability
If a takedown mechanism is added to eliminate trigger pull requirement, then safety is improved, but device complexity increases
Solution Approach 1:
The takedown safety lever serves multiple functions: it rotates the sear to release the striker for disassembly, and it can be integrated with existing safety mechanisms in the pistol. By making this single component perform multiple roles, the invention improves safety without proportionally increasing overall device complexity.
Solution Approach 2:
The invention merges the takedown function with the existing sear and striker mechanism. The takedown safety lever works in conjunction with the slide stop and existing safety features rather than requiring a completely separate system. This integration approach improves safety while minimizing the increase in device complexity.
3Reliability
If the slide is moved rearward to dissipate striker energy, then the striker energy is dissipated and chamber can be checked, but the disassembly process becomes more complex
Solution Approach 1:
The invention requires the slide to be moved rearward as a preliminary action before final disassembly. This preliminary movement dissipates striker energy and allows chamber inspection, ensuring safety is established before the actual disengagement of components. While this adds a step, it integrates with the natural cycling motion of the pistol.
Solution Approach 2:
Instead of releasing the striker first and then moving the slide, the invention inverts the sequence by moving the slide rearward first to dissipate energy and check the chamber, then releasing the striker. This inverted approach prioritizes safety actions before disengagement, resolving the contradiction between safety and process complexity.
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
Enables safe and trigger-free disassembly of striker fired pistols by dissipating striker energy, allowing chamber inspection for loaded rounds without the risk of accidental discharge, enhancing user safety and ease of maintenance.
Implementation Method 1
The takedown release including a spring and a pin is disposed in the frame adjacent to the rear end of the frame. The spring biases the pin towards the barrel end of the frame
Implementation Method 2
the sear contact surface on the takedown bar to contact the second leg of the sear to cause the sear to rotate away from the tab of the striker
Data Source
AI summary
A takedown mechanism for disassembly of a striker-fired pistol, including a takedown release comprising a spring and a pin disposed in the pistol frame adjacent its rear end, the spring to bias the pin towards the barrel end of the frame and disposed against a hard stop on the frame; a takedown bar having a sear contact surface and movable along the longitudinal axis of the frame from a first position to a second position, wherein the takedown release biases the takedown bar towards the barrel end of the frame, wherein, in the first position, the takedown bar is disposed between the takedown release and the slide stop, wherein longitudinal movement of the takedown bar towards the barrel end is limited by the slide stop, wherein, in the second position, the takedown bar is disposed in a forward position toward the barrel end of the frame to cause the sear contact surface on the takedown bar to contact the second leg of the sear to cause the sear to rotate away from the tab of the pistol striker such that the first leg of the sear no longer contacts the tab of the striker.