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:
Dec. 09, 2014
Filed:
Dec. 04, 2012
Applicant:
Greenlee Textron Inc., Rockford, IL (US);
Inventor:
William F. Nordlin, Poplar Grove, IL (US);
Assignee:
Textron Innovations Inc., Providence, RI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B26D 3/00 (2006.01); B23D 35/00 (2006.01); B26F 1/38 (2006.01); B26F 1/14 (2006.01); B23P 11/00 (2006.01); B21D 28/34 (2006.01); B26F 1/44 (2006.01);
U.S. Cl.
CPC ...
B23D 35/004 (2013.01); B26F 1/386 (2013.01); B26F 1/14 (2013.01); B23P 11/00 (2013.01); B21D 28/343 (2013.01); B26F 1/44 (2013.01);
Abstract
A punch assembly includes a punch, a sleeve, a draw stud and a die. The sleeve adds rigidity to the draw stud, thereby reducing elastic deflection of the draw stud, reducing bending moment on the draw stud, reducing punching force, and extending the punch, draw stud and die fatigue life. The sleeve also aids in axial alignment of the punch, die and workpiece with a pilot hole drilled through a workpiece.