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. 21, 2014
Filed:
Sep. 23, 2008
Torbjörn Lövgren, Kode, SE;
Pontus Louis Claesson, Helsingborg, SE;
Torbjörn Lövgren, Kode, SE;
Pontus Louis Claesson, Helsingborg, SE;
Aktiebolaget SKF, Gothenburg, SE;
Abstract
The invention concerns a valve actuator () comprising a housing () and a nut and screw arrangement. A first portion () of the nut and screw arrangement is operated by an electric motor (), which is fixed to the housing (). A means () is in contact with a second portion () of the nut and screw arrangement, and a resilient means () is acting between the means () and the housing (). A relative rotation between the threaded nut () and the threaded screw () leads to a translation of the means () and an energizing or de-energizing of the resilient means (). A locking means () locks the resilient means () in an energized state by locking the relative rotation of the nut and screw arrangement. When the locking means () are released, the resilient means (), when de-energizing, acts on the means (), leading to a translation of the means ().