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. 10, 1998
Filed:
Jun. 12, 1996
Hugo Frei, Werdenberg, CH;
Peter Keller, Sevelen, CH;
Balzers Aktiengesellschaft, Balzers, LI;
Abstract
A vacuum valve is used in vacuum systems having connectors including an internally threaded system component with connector seal, a KF-thread flange with connector seal, and a nut collar with clamping rings and pipe. The valve includes one valve case with an interior and at least two spaced apart openings communicating with the interior. The case defines a valve seat and has a valve member movable in the interior and into positions against the valve seat and away from the valve seat to close and open the valve. A driver is connected to the valve case for moving the valve member. A separate externally threaded nipple is provided around each opening and special sealing surfaces are on each nipple for connection to each of the vacuum system connectors in a vacuum-tight manner.