Patent ID: 6516930
Filing Date: 2003-02-11
Classification: F16D

Abstract:
A ratchet mechanism for tools, comprising:a ring member having a polygonal inner periphery and an annular groove defined in an outer periphery of said ring member, first bevel teeth and second bevel teeth respectively defined in said outer periphery of said ring member, said first bevel teeth and said second bevel teeth separated by said groove, an angle defined between each first bevel tooth and a line parallel to an axis passing through a center of said ring member, and the same angle defined between each second bevel tooth and the line parallel to the axis passing through the center of said ring member, and two pawl members connected by a spring and each pawl member having third bevel teeth and fourth bevel teeth, said third bevel teeth and said fourth bevel teeth respectively engaged with said first bevel teeth and said second bevel teeth.