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. 18, 2014
Filed:
Nov. 18, 2008
Jens Folkmar Andersen, Fredericia, DK;
Karsten Schack Madsen, Odense C, DK;
Kenneth Rehhoff, Odense C, DK;
Jens Folkmar Andersen, Fredericia, DK;
Karsten Schack Madsen, Odense C, DK;
Kenneth Rehhoff, Odense C, DK;
Alfa Laval Kolding A/S, Kolding, DK;
Abstract
In order to improve a drive arrangement () for valve devices () comprising a closing member (), comprising a movable drive element () for making an operative connection with the closing member (), pre-tensioning means for exerting a pre-tensioning force on the drive element () in order to hold the closing member () in a base position, preferably closed position, against the working forces acting on the closing member (), and driving means () to move the drive element () from the base position against the pre-tensioning force in the direction of the working forces, with a view to the disadvantages of the known drive arrangements, in particular in order to reduce the weight, it is proposed that the pre-tensioning means comprises a compressible fluid, preferably compressed air (), enclosed in a pre-tensioning container (), with a static pressure for producing the pre-tensioning force.