Patent · US Active

Valve device

US9115730B2 · kind B2 · utility

3Cited by

5References

23Claims

0Family size

Assignee

HYDAC FLUIDTECHNIK GMBH · DE

Inventors

Frank Schulz · Blieskastel, DE
Peter Bruck · Althornbach, DE
Markus Bill · Eppelborn, DE

Key dates

Filing date	Jan 15, 2011
Grant date	Aug 25, 2015
Priority date	—
Expiry date	Nov 25, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86614
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A valve device includes a valve housing (2) and a valve piston (4) axially displaceably in a housing bore (3). By valve piston movement, load connections (A, B) can alternately be connected to a pressure connection (P) and to a tank connection (T1, T2) by solenoid magnets (5, 6). Pilot control chambers (8, 10) pressurize piston back sides (9, 11). The control chambers (8, 10) are connectable via fluid-conducting connections (12, 13) to the pressure connection (P). Pilot control pistons (14, 15) release or close fluid-conducting connections (16, 17) between control chambers (8, 10) and the tank connection (T1, T2). One pilot control piston (14, 15) includes a ring channel (19) controlling a fluid-conducting connection (16, 17) between a pilot control chamber (8, 10) and a tank connection (T1, T2).

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