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. 31, 1998
Filed:
Aug. 23, 1996
Katja Schienle, Fellbach, DE;
Wolfgang Stephan, Nurtingen, DE;
Hydraulik-Ring Antriebs- und Steuerungstechnik GmbH, Nurtingen, DE;
Abstract
The actuator for a position-adjusting device, wherein the position-adjusting device has a stationary part, a movable part, and at least one coupling element and wherein the at least one coupling element is hydraulically movable by the actuator for coupling and decoupling the stationary part and the movable part relative to one another, has a housing and at least one valve piston arranged within the housing so as to be movable between two end positions defining an open position and a closed position of the actuator. The housing has a work connector, a pressure-relieved tank connector, and a pressure-loaded tank connector. The pressure-loaded tank connector includes a pressure-limiting valve. The pressure-relieved pressure connector during displacement of the valve piston between the two end positions communicates with the work connector until a respective one of the two end positions is almost reached. In the closed position of the actuator the work connector is connected to the pressure-loaded tank connector.