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:
Dec. 31, 2019
Filed:
Aug. 14, 2014
Hydac Fluidtechnik Gmbh, Sulzbach/Saar, DE;
Gerd Schneider, Dillingen, DE;
Markus Bill, Heusweiler, DE;
HYDAC FLUIDTECHNIK GMBH, Sulzbach/Saar, DE;
Abstract
A pressure retaining valve () has a main control piston () guided longitudinally displaceably in a single-piece or multiple-piece valve housing () and a non-return piston (). In a pressure retaining position, a fluid-conducting connection between connection points () is shut off by the two pistons (). Connection point () serves to feed media. Connection point () discharges media. Connection point () leads to a hydraulic consumer. In a load-raising position, the two pistons () move relative to one another into a release position, in which the connection between the medium feed () and the consumer is established. In a load-reducing position, the two pistons () assume a spacing from one another such that the connection between the medium discharge () and the consumer is established. A monitoring device () determines the individual switching positions of the pistons () to ensure reliable functioning of the pressure retaining valve ().