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:
Nov. 05, 2024
Filed:
Jan. 11, 2021
Zf Cv Systems Europe Bv, Brussels, BE;
ZF CV Systems Europe BV, Brussels, BE;
Abstract
A valve device (), of a pneumatically actuatable friction clutch engageable by spring force, includes at least one inlet valve () connected on the input side to a pressurized supply line and on the output side to an actuating cylinder of the friction clutch. A pressure-sustaining valve () is upstream or downstream of the inlet valve and is designed as a check valve closing in the backflow direction. The pressure-sustaining valve is a springless check valve and includes a housing ring () having a retaining basket (), a closing element (), and a valve seat (). The closing element, in the depressurized state and with a positive pressure gradient is held in the retaining basket () of the housing ring () and, with a negative pressure gradient is pressed out of the retaining basket () and against the valve seat ().