From Plastics Engineering® Magazine ©
A Quick Way to Avoid Bumps and Scrapes
The Fendergrip® helps prevent boat damage through faster, more effective fender deployment. Made of Dupont® Delrin® acetal resins, the device eliminates the time required to tie and retie lines. Its push button feature allows boaters to set fenders instantly at just the right height to cushion bumps against the dock or other boats. When the push button is released, the device provides a positive lock to hold the fender line in place.
The Fendergrip® consists of four injection molded parts; a two piece housing, a push button, and a cam plus four screws and a spring [all] made of stainless steel. Line threaded throught the unit is locked between integral teeth in the interior of the housing and the cam. Actuation of the push button disengages the cam and allows raising r lowering of the fender. Molded in ridges on the casing and push button allow a sure grip, even for wet hands.
The housing parts are molded from a white UV stabilized Delrin®. The push button and cam are molded from a black 25% glass reinforced [version of the] resin. Its reinforcemnt provides the added strength to withstand actuation and locking forces.
The manufacturer of the Fendergrip®, New World Marine, Inc., of Pompano Beach, Florida, specified Delrin® because of its strength, toughness, low wear and low friction; its resistance to attack by salt air, salt water, common marine chemical and sunlight; its suitability for precision molding; and its high molding productivity.
The Fendergrip® can be used with lines from 3/8 to 1/2 inch on cleats, grab handles, and rails of any size and shape....