Patent · US Active

Valve for locking and releasing a hydraulically actuated shifting element

US10253873B2 · kind B2 · utility

0Cited by

3References

14Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Josef Haupt · Tettnang, DE
Martin Brehmer · Tettnang, DE
Stefan Brom · Friedrichshafen, DE

Key dates

Filing date	Aug 21, 2015
Grant date	Apr 9, 2019
Priority date	—
Expiry date	Jun 17, 2037

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16K31/524
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A stop valve assembly is provided for the locking and unlocking of at least one hydraulic chamber of a shift element that is applied with operating pressure and is coaxially arranged at a shaft in a transmission housing of an automatic transmission of a motor vehicle. At least one first stop valve for lowering the operating pressure of the shift element and at least one second stop valve for raising the operating pressure of the shift element are provided.

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