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:
Nov. 04, 1980
Filed:
Mar. 20, 1978
Jerome A Gross, St. Louis, MO (US);
Other;
Abstract
For securing such materials as insulation to sheet metal, a nailable fastener has at one end of its metal shank three or more lobes which interpenetrate the sheet metal and bend radially outward to become firmly embedded in the sheet. Each lobe of the fastener, as manufactured, has an inner camming surface which slopes outward to the rounded outer surface, which is a continuation of the generally cylindrical shank. The intersection of these two surfaces forms a semi-elliptical cutting edge terminating in a tip. The tip and the cutting edge progressively slit and raise a pocket in the sheet for each lobe, as its inner camming surface bends the lobe outward. The resulting radial interpenetration secures and stabilizes the fastener.