Patent ID: 6158308
Filing Date: 2000-12-12
Classification: B25B

Abstract:
An allen wrench comprising:a handle;a ring integrated with one end of the handle and including an inner flange extending inward from a middle inner periphery of the ring to define a central bore thereinbetween and a first ratchet formed around underside of the inner flange;a first tip head having a hollow interior rectangular body engageable into the central bore of the ring, a first outer flange extending outward from a middle outer wall of the body and engageable into the ring above the inner flange with a compression spring disposed therebetween, and a thru hole formed in a lateral wall of the body above the first outer flange;a second tip head having a solid rectangular body including a narrow upper portion inserted into the hollow interior rectangular body of the first tip head from the underside of the ring, said narrow upper portion having a first transverse cavity for receiving a first steel ball biased by a first spring means which is engaged into the thru hole when the narrow upper portion is inserted in place into the hollow interior body of the first tip head, a thick lower portion, a second outer flange extending outward from an outer wall between the upper and lower portions and engageable into the ring from underside of the ring, a second ratchet formed around top of the second outer flange and engaged with the first ratchet of the inner flange of the ring and a second transverse cavity formed in a lateral side of the thick lower portion for receiving a second steel ball which is biased by a second spring means;whereby, said first tip head fastens a screw counterclockwise and said second tip head fastens a screw clockwise.