Grip for tools which have four tangential grooves

摘要

The grip is used to hold tools, with cylindrical shafts, which have four tangential grooves (23,24,25,26) which are equi-spaced around the circumference of the tool shaft. The grip has two fixed edges (28,29) which engage with two of the grooves in the tool and two edges (27,30) which are located on pivoting levers (5,7). The pivoting levers consist of short upper arms (6,8), which are loaded apart by a spring (14), and longer lower arms. Rollers (19,20) are mounted on the ends of the longer arms. the rollers make it easier to push the grip over the cylindrical tool shaft