Removable fastening system for handle of tool has knob, capable of being twisted through ninety degrees, connected to catch engaging in undercut groove

摘要

The mouth of the undercut groove (331) is parallel-sided leading into a cylindrical portion (332). The knob (21) has a blade-shaped grip and the catch (22) is a cylinder with two diametrically opposed flats. The catch may be retained in the groove or may be turned so that the flats slide through the mouth of the groove. The groove is formed in a plug (32) on the base of the tool (30), which fits into a socket (12) in the end of the handle (10). Projections in the floor of the socket fit into additional sockets in the base of the tool.