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:
Feb. 24, 2015
Filed:
Dec. 09, 2009
Jens Christian Folkmar Andersen, Fredericia, DK;
Karsten Schack Madsen, Odense C, DK;
Kenneth Rehhoff, Odense C, DK;
Louise Wichmann Agner, Kolding, DK;
Jens Christian Folkmar Andersen, Fredericia, DK;
Karsten Schack Madsen, Odense C, DK;
Kenneth Rehhoff, Odense C, DK;
Louise Wichmann Agner, Kolding, DK;
Alfa Laval Corporate AB, Lund, SE;
Abstract
Actuator for a seat valve or a butterfly valve which is of the type that is normally closed (NC) or normally open (NO), and also has a cylinder and a piston being held in the normal position by a spring. The spring includes a closed space with a pressurized fluid, and the actuator further has at least a top unit, with two or more connections for a pressurized fluid. The actuator is with one of the connections in the top unit that is connected to the inside of the cylinder through one or more openings at one end of the cylinder and another connection is connected to the inside of the cylinder through one or more openings at the other end of the cylinder. The top unit is designed to allow the connections to be interchanged by changing the position of the top unit, e.g. by turning the top unit 180 degrees around an axis corresponding to or parallel to the axis of the piston and cylinder.