The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 1993
Filed:
Oct. 11, 1991
Applicant:
Inventors:
Victor L Chun, Holland, PA (US);
Charles E Butz, Aston, PA (US);
Assignee:
Murata Machinery Limited, Aichi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D / ; B26F / ;
U.S. Cl.
CPC ...
83139 ; 83140 ; 83698 ;
Abstract
A punch holder is described having a stripper arrangement composed of an annular array of nested coil springs housed within a series of aligned facing bores in a punch holder tang and punch holder body to generate a high stripping force in a compact space. A threaded removal ring is employed to force a press fitted stripper cap off the end of the punch holder body. A support ring can be employed to support the stripping cap for small sized punches, or a metal reinforcement molded into the stripper cap.