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:
Jul. 03, 2001
Filed:
Jun. 04, 1999
Erich Palm, Au, CH;
SFS Industrie Holding AG, Heerbrugg, CH;
Abstract
In a screw (,) for mutual fastening of two components (,and,) there is provided a shank (,) with a thread (,), an unthreaded shank portion (,) and a screw head (,). The end region (,) of the thread (,) adjacent to the unthreaded shank portion (,) tapers with constant thread pitch (S), and so the tapering end region (,) of the thread (,) forms a kind of frustoconical envelope surface (,) upon rotation of the screw (,). During setting of the screw (,) and during over-torquing thereof, the end region (,) of the thread (,) acts as a kind of milling cutter and makes a frustoconical opening (,) in the component (,). The thread flights in the tapering end region (,) can then be braced against the wall of this opening (,), so that mutual contact pressure between the components (,and,) is possible despite over-torquing of the screw (,).