Patent · US Active

Valve, in particular pilot-operated proportional pressure control valve

US9915276B2 · kind B2 · utility

6Cited by

11References

16Claims

0Family size

Assignee

HYDAC FLUIDTECHNIK GMBH · DE

Inventors

Peter Bruck · Althornbach, DE
Philipp Hilzendegen · Weiskirchen, DE
Gerd Schneider · Dillingen/Saar, DE

Key dates

Filing date	Mar 5, 2013
Grant date	Mar 13, 2018
Priority date	—
Expiry date	Jun 25, 2033

Classification

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

Abstract

A valve, in particular a pilot-operated proportional pressure control valve, has a valve housing (5) with a pressure supply port (7), a working port (9), and a drain port (11). In the valve housing (5), a main valve piston (15) can be moved by a pilot stage (13) for control of the fluid flow between the pressure supply port (7) and the working port (9). The pilot stage (13) has a valve closing element (43) for a pilot chamber (41). The valve closing element (43) is movable from an open position (OS) into a closed position (SS) by an actuating apparatus (45). The valve closing element (43) can actuate a leakage reduction stage (53).

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