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. 24, 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 ...
411387 ; 411533 ;
Abstract
A threaded fastener unit comprising a preassembled fastener for use in association with thin metal panels having a head with a clamping surface thereunder, a shank and a drill point, said shank having an upper unthreaded shank portion, a lower threaded shank portion with an annular shoulder therebetween and a washer, said threaded shank portion having a plurality of helical thread convolutions for forming complementary threads and extruding a portion of a panel, and said shoulder being adapted to deform the extruded panel portion for gripping the screw and resisting retrograde rotation of the screw.