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:
Mar. 31, 2015
Filed:
Dec. 16, 2013
Applicant:
Parker Fasteners, Llc, Goodyear, AZ (US);
Inventor:
Robert Parker, Surprise, AZ (US);
Assignee:
Parker Fasteners, LLC, Goodyear, AZ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16B 35/06 (2006.01); F16B 23/00 (2006.01); F16B 41/00 (2006.01);
U.S. Cl.
CPC ...
F16B 23/0046 (2013.01); F16B 23/0007 (2013.01); F16B 41/005 (2013.01);
Abstract
A tamper-resistant fastener includes a non-circular drive recess optionally with a non-circular center post. Preferably the recess and center post are at least partially ellipsoidal cylinders that are concentric and aligned (i.e. they share a common major axis direction). This configuration forms a slot having preferably a substantially uniform width into which an authorized driver is inserted. The length of the major maximum dimension of the post is selected so that a circular arc tangent to the maximum radius of the post will pass closely to or intersect the minimum radial dimension of the recess.