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:
Oct. 07, 2003
Filed:
Jan. 11, 2001
Bernhard Duelli, Uebersaxen, AT;
VAT Holding AG, Haag, CH;
Abstract
A vacuum valve comprises a wall with a valve opening and a valve seat, a valve plate which is pressed against the valve seat in the closed state, an elastic sealing ring which is arranged at the valve plate or at the valve seat and, in the closed state of the valve, is pressed by a pressing force against a sealing surface arranged at the valve seat or at the valve plate and seals the valve opening, and a supporting ring which is made of plastic and which is arranged at the valve plate or at the valve seat and, at least in the closed state of the vacuum valve, lies closer to the valve opening than the sealing ring, viewed from the sealing ring, and limits the pressing force acting on the sealing ring in the closed state of the vacuum valve.