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:
Jun. 07, 1988
Filed:
Nov. 19, 1986
Applicant:
Inventor:
Henry A Sygnator, Arlington Heights, IL (US);
Assignee:
Illinois Tool Works Inc., Chicago, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16B / ; F16B / ;
U.S. Cl.
CPC ...
411188 ; 411311 ; 411399 ; 411412 ;
Abstract
A sheet metal screw is disclosed having an enlargement in the form of a helical ramp on the shank adjacent the head, which ramp extends for only about 180 degrees for providing an interfering fit with a workpiece to obtain an anti-stripping action while permitting the screw to provide an effective clamping action.