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. 20, 1990
Filed:
Sep. 15, 1988
Applicant:
Inventor:
Gerhard Bogel, Balgach, CH;
Assignee:
SFS Stadler AG, Heerbrugg, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16B / ;
U.S. Cl.
CPC ...
411531 ; 411533 ; 411544 ; 405259 ;
Abstract
In a washer, a central opening is provided for receiving a screw. This large surface-area washer comprises a flat edge area extending so as to be closed with a convexly curved portion adjoining the latter. The central opening is defined by a wall which is conically shaped or comprises one or more steps. The washer serves to fasten parts to an underlying structure, particularly to fasten single-layer or multiple-layer roofing with insulating material on a fixed underlying structure.