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:
Apr. 20, 1993
Filed:
Jan. 14, 1992
Applicant:
Inventor:
John H Grady, Wayland, MA (US);
Assignee:
Phillips Screw Company, Burlington, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21K / ;
U.S. Cl.
CPC ...
470 63 ;
Abstract
A punch is provided for making a screw head with ribs on some of the driver surfaces. The punch includes a slanted groove for providing a rib which is slanted from the screw axis by a small angle between 1.degree. and 10.degree..