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:
Aug. 31, 1993
Filed:
Jun. 10, 1992
Wolfgang Kauss, Lohr-Wombach, DE;
Rainer Biener, Steinfeld Hausen, DE;
Mannesmann Rexroth GmbH, Lohr/Main, DE;
Abstract
A circuit for limiting a static and/or dynamic pressure load in a hydraulically actuated use device which is controlled in a closed control circuit by means of a directional control valve and a mechanically or hydraulically releasable blocking device. Aa pressure control valve is arranged between the use device and the pressure relief valve and being adapted to discharge a hydraulic fluid from the use device to a tank when a predetermined hydraulic pressure in the use device is exceeded. The output port of the pressure relief valve is connected to a hydraulic control line is adapted to hydraulically connect the pressure relief valve to a control side of the control valve. Thus, the control valve is turnable by the discharging pressure of the pressure relief valve in a switching position in which a feed line leading to the use device is connected with the tank, and said blocking device is turned in a released state so that the hydraulic fluid in the use device is dischargeable to the tank via the blocking device and the control valve.