Mechanical punch driver
AssigneeEx-Cell-O Corporation
InventorLarry G. Adleman
Life of this patent
Estimating the term…
Abstract
A mechanical knock-out punch driver has a torque housing that has a recirculating ball screw unit rotatably supported therein. A driver collar is connected to a rotatable handle to direct a rotary input force to a nut portion of the ball screw unit so as to drive the screw portion of the ball unit and a draw stud connected thereto axially and linearly without rotation. A draw punch is pulled by the non-rotating draw stud to cut a slug of material from a sheet material panel to produce a clearance hole for the passage of electrical conduit, tubing, piping or the like.
Claims6
A mechanical operator for driving a punch through sheet material to remove a slug therefrom so as to form a clearance hole in the sheet material comprising a thrust housing, a recirculating ball screw unit having a screw and a rotatable nut, means for supporting said rotatable nut within said thrust housing for rotation with respect thereto, input drive means including a pair of relatively rotatable operating handles for producing a rotative input force on said rotatable nut to cause non-rotative axially linear movement of said screw, a draw stud secured to said screw and conjointly moveable therewith, said draw stud having a threaded end receiving the punch to pull the punch through the sheet material while eliminating frictional thread drag between the punch and the draw stud.
A mechanical operator for driving a punch through sheet material to remove a slug therefrom so as to form a clearance hole in the sheet material comprising a thrust housing, a recirculating ball screw unit having a screw and a rotatable nut, means for supporting said rotatable nut within said thrust housing for rotation with respect thereto, input drive means including a pair of relatively rotatable operating handles for producing a rotative input force on said rotatable nut to cause non-rotative axially linear movement of said screw, a draw stud secured to said screw and conjointly moveable therewith, said draw stud having means thereon connectable to the punch to pull the punch through the sheet material without relative movement between the punch and draw stud thereby to eliminate frictional drag between the punch and the draw stud.
Dependencies are inferred from the claim text.