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. 11, 1986
Filed:
Feb. 01, 1985
Waldemar H Greiner, Hamilton, CA;
Ductlok, Inc., Hamilton, CA;
Abstract
A mechanical connection for connecting together a juxtaposed first and second layer of malleable sheet material includes the use of a third layer of malleable sheet material overlying the first and second layers, with the second layer sandwiched between the first and third layers. The first layer has a first displaced pocket projecting away from the second layer, and the second layer has a second displaced pocket nesting within the first displaced pocket. The third layer has an aperture in registry with both pockets, the aperture resulting from the punching out of a disc or slug which is nested within the second displaced pocket. In a preferred embodiment, a length of duct with at least one flat wall has an intermediate lateral stiffener which includes a base leg defined by two juxtaposed layers of sheet metal, the base leg being connected with the flat wall against which it is juxtaposed by the mechanical connection described above.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile