Patent ID: 6295899
Filing Date: 2001-10-02
Classification: B25B

Abstract:
A wrench comprising:a drive head including an opening formed therein for defining an inner peripheral portion therein, said opening of said head including a center, said head including a plurality of notches formed in said inner peripheral portion thereof and each defined by an inclined surface, said inclined surfaces each including a first end located closer to said center of said opening of said head and each including a second end located distal to said center of said opening of said head,a barrel rotatably received in said opening of said head, said barrel including a bore formed therein for receiving a fastener to be driven by said drive head and including a plurality of channels formed therein and communicating with said bore of said barrel, said barrel including a first end and a second end,a plurality of drive inserts slidably received in said channels of said barrel respectively, said drive inserts each including a first end extendible inward of said bore of said barrel for engaging with the fastener, said drive inserts each including a second end slidably engaged with said inclined surfaces of said head respectively for determining an engagement of said first ends of said drive inserts into said bore of said barrel, andsecuring means for rotatably securing said barrel to said head, said securing means including a peripheral stop extended radially outward from said first end of said barrel, and including a ring secured to said second end of said barrel, for engaging with said head and for retaining said barrel within said opening of said head, said ring including a hand grip extended outward therefrom for rotating said ring and said barrel relative to said head.