Patent ID: 6085400
Filing Date: 2000-07-11
Classification: B21J,Y10T

Abstract:
A riveting pliers comprising:a casing, said casing comprising a bottom sliding hole and a hollow guide fixedly provided at said bottom sliding hole;a sleeve vertically mounted in said casing in vertical alignment with said bottom sliding hole, said sleeve having a tapered front end;a plurality of jaw plates mounted in the tapered front end of said sleeve;an annular block mounted in said sleeve and supported on said jaw plates;an annular screw threaded into said sleeve;a compression spring mounted in said sleeve and retained between said annular block and said annular screw;a handle having a front end pivoted to said casing;a pressure bar driven by said handle to lift said sleeve in said casing; andat least one link coupled between said handle and said pressure bar;wherein said pressure bar has a middle part pivoted to the inside of said casing by a pivot, a forked front end clamped on two recessed portions at the periphery of said sleeve at two opposite sides, a forked rear end mounted with a transverse pivot and a roller on said transverse pivot; said handle has a downward sloping flange stopped at the roller at said pressure bar; and at least one link each has a top end pivoted to said handle in front of said downward sloping flange and a bottom end pivoted to the forked rear end of said pressure bar in front of the transverse pivot at said pressure bar.