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, 2021
Filed:
Jun. 12, 2020
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Florian Langenbacher, Kressbronn, DE;
Tobias Schmidt, Potsdam, DE;
Hans-Joachim Martin, Kressbronn, DE;
Rainer Novak, Bregenz, AT;
ZF FRIEDRICHSHAFEN AG, Friedrichshafen, DE;
Abstract
A pressure back-up valve () includes a release piston () movable between first and second stop positions and a closing body () movable to a closing position in which this separates first and second connection pressure chambers () when the release piston () is in a first stop position. The release piston () moves the closing body (), in the second stop position, into an opening position. The release piston () is pressurizable on a first pressure surface (A) from a first side via a third connection pressure chamber () and on a second pressure surface (A) from a second side via a second connection pressure chamber (). The closing body () is pressurized, in the closing position, from a first side via the second connection pressure chamber () on a first pressure surface (A) and from a second side via the first connection pressure chamber () on a second pressure surface (A) of the closing body ().