Patent ID: 7584686

Claim:
A socket wrench comprising: a driving head including a chamber formed therein, a housing disposed in said chamber of said driving head, and including a compartment formed in said housing, and including a central hole formed therein and communicating with said compartment of said housing, and including an upper portion, and including a curved surface formed in said upper portion of said housing and having at least one protruded portion and at least one recessed portion, a gear rotatably received in said compartment of said housing for being selectively rotated by said housing and said driving head, and including a driving stem extended therefrom, and including a bore formed in said driving stem, and including an orifice formed in said driving stem and communicating with said bore of said gear, a detent slidably received in said orifice of said driving stem and extendible into and out of said driving stem, a shaft slidably and rotatably received in said bore of said gear, and including an actuating end for engaging with said detent and for selectively moving said detent into and out of said driving stem, and including a driven end provided thereon, means for biasing said actuating end of said shaft to engage with said detent, and a follower attached to said shaft and to be rotated relative to said housing by said shaft, and including a curved surface formed in said follower and having at least one protruded portion and at least one recessed portion for engaging with said at least one protruded portion and said at least one recessed portion of said housing respectively, said at least one protruded portion of said follower being engageable with said at least one recessed portion of said housing, and said at least one recessed portion of said follower being engageable with said at least one protruded portion of said housing for allowing said actuating end of said shaft to be biased to engage with said detent and to move said detent out of said driving stem, and said at least one protruded portion of said follower being engageable with said at least one protruded portion of said housing when said follower is rotated relative to said housing by said shaft, for allowing said actuating end of said shaft to be disengaged from said detent and to be selectively moved into said driving stem.