Patent · US Expired

Hydraulic control valve

US4890647A · kind A · utility

2Cited by

5References

8Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Berthold Pfuhl · Markgröningen, DE
Volkmar Leutner · Friolzheim, DE
Eckard Schuttenberg · Stuttgart, DE

Key dates

Filing date	Sep 30, 1988
Grant date	Jan 2, 1990
Priority date	—
Expiry date	Sep 30, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/8671
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A hydraulic control valve comprises a housing having a slider opening and at least two pressure medium chambers, a control member which is longitudinally movable in the opening so as to at least control a communication between the two pressure medium chambers, the control member having two opposite ends, a rotation preventing element provided on one of the ends of the control member, a coupling part which is arranged on the control member non-rotatably and longitudinally displaceably relative to the latter, and a structural member which is arranged radially to the control member so as to guide the coupling part longitudinally displaceably and non-rotatable relative to the housing.

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