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. 23, 2001
Filed:
Sep. 26, 2000
Herbert Robert Coura, Büchen, DE;
Wolfgang Rauen, Weite Welt/Seedorf, DE;
Martin Sauer, Kaisheim, DE;
Werner Schmid, Heidenheim, DE;
Tuchenhagen GmbH, Buchen, DE;
Abstract
The invention relates to a bellows to seal a valve rod passage in a lifting valve, specifically formed as an expansion bellows or corrugated tube, which ensures a reliable, hygienically proper and durable static sealing of the connecting flange of a closing-member unit in the box of the lifting valve under the occurring forces at an adequately long service life. This is achieved by the fact that the connecting flange (,) of the closing-member unit (,), in the region where it is connected to the bellows (,), has a fastening component (,) indirectly supported on the box side to absorb, in a way free from bending moments to a very large extent, the forces resulting from the valve-lift induced deformation of the bellows (,) and/or the respective pressure in the box (,) and is reduced, in the area of its conical sealing surface (,), to a minimal wall thickness meeting the strength-related requirements, in the form of a diaphragm-shaped sealing element (,), and that the diaphragm-shaped sealing element (,), on its side facing away from the conical scaling surface (,) has at least one biased elastic thrust ring (,) which presses the sealing surface (,) onto the complementary annular seating surface (,).