Two piece punch with pilot hole locator
AssigneeGreenlee Textron Inc.
InventorWilliam F. Nordlin
Life of this patent
Estimating the term…
Abstract
A two piece punch is provided for use in a punch assembly. The punch includes a generally disc shaped cutter and a cylindrically shaped nut. The punch is assembled by passing a portion of the nut through an aperture in the cutter. The punch is mounted to the remainder of the punch assembly by fastening the nut to the draw stud. As the punch becomes worn, use of the nut continues while the cutter is removed and replaced.
Claims20
A punch adapted to be mounted on a draw stud and for cutting a hole in a workpiece, said punch comprising:
- a cutter including a distal surface, a proximal surface, an aperture through said cutter extending from said distal surface to said proximal surface, said proximal surface being used to form a hole in a workpiece and having a forwardmost end defined thereby;
- a nut removably mounted to said cutter, said nut including a first portion, a second portion and means for engaging a draw stud with said nut, a perimeter of said first portion is larger than a perimeter of said second portion;
- and
- said cutter is assembled with said nut by passing said second portion of said nut through said aperture in said cutter, an end portion of said second portion of said nut extending beyond said forwardmost end of said cutter when said cutter is assembled with said nut.
A punch adapted to be mounted on a draw stud and for cutting a hole in a workpiece, said punch comprising:
- a cutter including an aperture therethrough, and a surface which is used to form a hole in a workpiece, said surface having a forwardmost end;
- and
- a nut removably engaged with said cutter by passing said nut through said aperture, a portion of said nut extending beyond said forwardmost end of said cutter when said nut is engaged with said cutter, said nut including means for engaging a draw stud.
Dependencies are inferred from the claim text.