Patent ID: 7197964
Filing Date: 2007-04-03
Classification: B25B

Abstract:
1. A wrench comprising a head portion defining a circular aperture, a split ring sprung into said aperture and having spaced-apart end portions and a handle pivotally coupled to said head portion for moving said end portions together, said split ring having an abutment portion and a camming portion, said abutment portion being adapted to cooperate with a complementary abutment portion formed in said head portion to limit the available rotation of the split ring within the aperture, and said camming portion being adapted to cooperate with a complementary part on said pivotal lever for moving the spaced-apart end portions of the split ring together when said abutment portion of the split ring is abutting the complementary abutment portion on the head portion, and spring means biasing said handle in a sense to close said spaced apart end portions of the split pin together with a force greater than the spring force developed by the split ring itself.