Patent · US Active

Valve, especially proportional pressure control valve

US7841360B2 · kind B2 · utility

15Cited by

14References

10Claims

0Family size

Assignee

HYDAC FLUIDTECHNIK GMBH · DE

Inventors

Peter Bruck · Althornbach, DE
Hermann Albert · Lebach, DE

Key dates

Filing date	Jan 25, 2006
Grant date	Nov 30, 2010
Priority date	—
Expiry date	Jan 30, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/87917
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A proportional pressure control valve includes a valve housing (38) with at least three fluid connections (1, 2, 3). The valve can be connected to a hydraulic drive system with a pre-determinable consumer pressure. The valve can perform reliable valve switching functions even for low-viscous fluid media, and can reduce its susceptibility to disturbance variables. A valve piston (56) actively connected to a pilot seat (5) by an energy accumulator (62) can be controlled by a control device (40). The consumer pressure on a fluid connection (1) acts on the valve piston (56) such that, according to the consumer pressure and the actuating force of the control device (40), a fluid can flow between the two other fluid connections (2 and 3) in both directions inside the valve housing (38).

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