Patent · US Active

Valve device of a pneumatically actuatable friction clutch

US12135091B2 · kind B2 · utility

0Cited by

6References

20Claims

0Family size

Assignee

ZF CV SYSTEMS EUROPE BV · BE

Inventors

Lars Didwiszus · Hannover, DE
Hauke Karstens · Hamburg, DE
Michael Günther · Koblenzer Straße, DE

Key dates

Filing date	Jan 11, 2021
Grant date	Nov 5, 2024
Priority date	—
Expiry date	Aug 1, 2041

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16D2500/1027
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A valve device (2), of a pneumatically actuatable friction clutch engageable by spring force, includes at least one inlet valve (16, 18) 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 (20, 28) 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 (22, 30) having a retaining basket (36), a closing element (24, 32), and a valve seat (26, 34). The closing element, in the depressurized state and with a positive pressure gradient is held in the retaining basket (36) of the housing ring (22, 30) and, with a negative pressure gradient is pressed out of the retaining basket (36) and against the valve seat (26, 34).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.