Patent ID: 6427515
Filing Date: 2002-08-06
Classification: B23D,B25B

Abstract:
Apparatus for the mechanical treatment of workpieces, said apparatus comprising:a first tong member having a working end and a driving end; a moveable second tong member pivotally attached to the first tong member and having a working end and a driving end, wherein tools can be removably attached to the working ends of both tong members; a tong handle fixed to the first tong member; a restoring spring attached between the tong members to urge the working ends open; a ram and piston assembly disposed at the driving end of the first tong member, the ram having a ram stroke path; a spacer pivotally attached to the moveable second tong member and disposed to engage the driving end of the first tong member when pivoted into alignment with the ram stroke path, wherein such engagement spaces the driving ends to partially close the working ends; an actuator element pivotally attached to the handle, said element having a projection and an actuator arm which engages and pivots the spacer toward alignment with the ram stroke path when the actuator is pivoted toward the handle; a tension spring urging the actuator element away from the handle; and a switch disposed proximate the actuator element, wherein full pivoting of the actuator element toward the handle engages the projection against the switch to trigger the ram to act against the spacer to further space the driving ends to further close the working ends.