Patent · US Active

Valve assembly

US8973609B2 · kind B2 · utility

2Cited by

4References

8Claims

0Family size

Assignee

HYDAC FLUIDTECHNIK GMBH · DE

Inventors

Philipp Hilzendegen · Weiskirchen, DE
Peter Bruck · Althornbach, DE
Hermann Albert · Lebach, DE

Key dates

Filing date	Oct 14, 2010
Grant date	Mar 10, 2015
Priority date	—
Expiry date	Sep 25, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/87193
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A valve assembly for regulating the pressure of a pressure medium (2) of a pressure medium pump (3) to at least one first consumer (4) includes a pilot-controlled pressure control valve (5) with a main piston (6) acted on by the pressure medium (2) and a pilot piston (7). A pressure chamber (8) between a piston back side (9) of the main piston (6) and the pilot piston (7) can be relieved. A relief valve (10) is connected in a fluid-conducting manner to the pressure chamber (8), opens when pressure at the load sensor (LS) represents an out-of-operation mode of the consumer (4), and recirculates pressure medium (2) having a low pressure to a pressure medium reservoir (11) or to the pressure medium pump (3). The relief valve (10) closes when the pressure at the load sensor (LS) represents an in-operation mode of the consumer (4).

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