Spring

US12631414 - Gun magazine including spring with uneven stack height upon compression

A gun magazine spring and magazine assembly having a novel design. The coils of the spring are configured to nest in certain regions and overlap in others. The result is that—as the spring nears its fully compressed state—the spring has an uneven stack height from left to right. The uneven stack height produces a predictable lateral displacement of the follower. The higher of the two stacked sides of the spring protrudes laterally outward through a lateral relief in the follower. This feature allows the spring and follower to overlap in the vertical direction to a greater extent than would be possible with conventional laterally-even spring nesting. The additional overlap produces additional internal space while also ensuring that the spring and follower assembly behave in a predictable manner.

US12624913 - Gun magazine spring state indication system and method

A novel system and method for determining when a magazine spring has exceeded a compressive set tolerance and needs to be replaced. The spring includes a visual indicator. The visual indicator is positioned so that it is visible beyond the bottom of the magazine tube when the follower and magazine spring are inserted into the tube and the follower is raised to its uppermost position. The visual indicator is not visible beyond the bottom of the magazine when the spring has exceeded its compressive set tolerance.

US12613074 - Archery bow with axial tensile springs and slope-based CAMS

An archery bow includes a riser, a cam module rotatably mounted to a fixed pivot supported by the riser, and an energy storage system comprising at least one axial tensile spring operatively coupled to the cam module via a multi-roller shuttle assembly. The cam module includes a cam track with a variable slope profile that governs the draw force curve during rotation. The multi-roller shuttle assembly engages both the cam track and a guide track surface to constrain the shuttle to a defined path, thereby elongating the axial tensile spring as the bow is drawn. The cam module includes parallel string grooves for engaging a single bowstring without synchronization cables. The axial tensile spring may be folded around a turning element to form two tensile legs and housed within the riser. This configuration enables compact, lightweight bows with customizable draw characteristics and reduced lateral torque.

USD1093538 - Pointed recoil spring guide for pistol