Patent · US Expired

Directional control valve

US3995652A · kind A · utility

27Cited by

5References

4Claims

0Family size

Assignee

ITT Industries · US

Inventors

Juan Belart · Walldorf, DE
Leo Vermeyen · Kontich, BE
Pieter VAN DEN Eynden · Ranst, BE

Key dates

Filing date	Jun 6, 1975
Grant date	Dec 7, 1976
Priority date	—
Expiry date	Jun 6, 1995

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86622
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A solenoid operated 3-way, 2-position directional control valve for use in an antiskid regulation system includes an armature controlled by a solenoid and is firmly connected to a valve spool movable in a bore. The valve spool enables an outlet port to wheel brake cylinders to communicate with a fluid source (master cylinder) or a reservoir. The valve spool is actuated by the pressure at the outlet port in the direction of the solenoid and in opposite direction by the pressure of the fluid source such that the valve spool assumes an intermediate equilibrium position between its two normally open and normally closed positions. In this equilibrium position the outlet port is blocked from both the fluid source and reservoir.

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