Patent · US Active

Proportional pressure control valve

US8662109B2 · kind B2 · utility

9Cited by

10References

18Claims

0Family size

Assignee

HYDAC FLUIDTECHNIK GMBH · DE

Inventors

Markus Bill · Eppelborn, DE
Peter Bruck · Althornbach, DE
Gerd Schneider · Dillingen/Saar, DE

Key dates

Filing date	Nov 4, 2009
Grant date	Mar 4, 2014
Priority date	—
Expiry date	Dec 15, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86702
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A proportional pressure control valve includes a valve box (10) having a pump (P), user (A) and reservoir (T) connections. Control piston (18) is guided in a longitudinally displaceably inside the valve box (10) for optionally connecting the pump connection (P) to the user connection (A) and the user connection (A) to the reservoir connection (T). A fluid-carrying connection is established between the pump connection (P) and a pilot chamber (20) of a pilot valve (22). The pilot valve (22) is controlled by a magnet system, especially a proportional magnet system (28). The proportional pressure control valve, for the fluid-carrying connection to the pilot chamber (20), has a bore (27) extending axially inside the wall of the valve box (10) and from a radial bore (9) of the housing (10) forming the pump connection (P).

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