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. 14, 1989
Filed:
Mar. 18, 1988
Applicant:
Inventors:
Frank Piacenti, Campbellsville, KY (US);
Pat Ferrante, Campbellsville, KY (US);
Assignee:
Emhart Industries, Inc., Farmington, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16B / ;
U.S. Cl.
CPC ...
411188 ; 411161 ; 411959 ;
Abstract
A threaded fastener is provided having a head for accommodating a tool for rotating the fastener. A plurality of ribs culminating in teeth are provided under the head for engaging the material into which the fastener is inserted, each rib and tooth having a ramp surface and a brake surface, the ribs being oriented for inhibiting either clockwise rotation or counter-clockwise rotation of the fastener by torque created through contact of the brake surfaces with the material. The ribs are formed on the fastener during the heading process by means of a matched die set.