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:
Sep. 01, 1992
Filed:
Dec. 13, 1990
Applicant:
Inventor:
Rico Plangger, Turgi, CH;
Assignee:
Asea Brown Boveri Ltd., Baden, CH;
Primary Examiner:
Int. Cl.
CPC ...
F15B / ; F16K / ;
U.S. Cl.
CPC ...
137557 ; 73168 ; 251 29 ; 251 3001 ;
Abstract
A drive for a feed valve having an actuating line and a device for controlling the pressure in the actuating line. The device comprises three valves connected to one another to form a hydraulic auctioneering circuit. The drive is suitable for a comparatively high oil pressure, and the drive is provided with a test system which monitors the operativeness of the drive. The test system is pressurized by the device, and a pressure drop can be sensed in the test system by a sensor.