Pivot Point Inc., Hustisford, Wis., has invented the SLIC Pin (U.S. patent number 6,872,039, foreign patents pending), a new quick-locking pin that functions as a pin and cotter all in one. The self-locking implanted cotter, or SLIC, pin is secure and self locking through the use of an implanted plunger (locking detent) that effectively functions as a self-contained cotter pin.
It features a solid, spring-loaded, wedge-shaped plunger that combines ease of use with secure fastening. The wedge-shaped plunger easily and automatically retracts when the pin is inserted into a hole. The angled, ramp-like face of the wedge ensures smooth insertion. Once fully inserted, the plunger springs back up, locking the pin into the application. The vertical face at the rear of the plunger prevents the pin from backing out.
The SLIC Pin is intended for use as a semi-permanent, quick-locking pin and can be used in a multitude of applications. Although it is used in the same manner as other labor intensive fastening combinations, such as a clevis pin and cotter pin; a pin and retaining ring; or a nut and bolt, it has a much improved functionality and ease of assembly. According to Pivot Point, the plunger is as strong as a respective cotter pin. The simple, one-piece design means easier, safer, and faster assembly speeds. No tools are needed, there are no sharp ends as with cotter pins, and there are fewer items to purchase and inventory.
According to the company, the SLIC Pin is beneficial in applications with blind holes and/or space constraints. It is quickly and easily inserted from one side, and there is no need to access the other side to secure another fastener like a cotter pin, a nut, or a clip.
The SLIC Pin can be configured to suit individual applications and produced in a Clevis Pin head, grab ring, or other style. Various pin materials and finishes are available.