Patent · US Active

Two-stage valve for controlling fluids

US7954511B2 · kind B2 · utility

2Cited by

7References

12Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Gerold Kohlberger · Märkisch Buchholz, DE
Guenther Schnalzger · Blaichach, DE
Ingo Buchenau · Kempten (Allgäu), DE
Regine Kraft · Charleston, US
Hans-Peter Bartosch · Oberstdorf, DE

Key dates

Filing date	Nov 15, 2006
Grant date	Jun 7, 2011
Priority date	—
Expiry date	Aug 30, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/88038
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

The present invention relates to a two-stage valve for controlling fluids, in particular a hydraulic fluid. The valve includes an actuating element, a pilot stage having a first valve seat and a first closing body, which is connected to the actuating element, and a main stage having a second valve seat and a second closing body. The second closing body is provided with a fastening region and a main region having a passage opening. The first valve seat is arranged at the passage opening. The second closing body is connected to the actuating element via the fastening region. The fastening region is designed elastically in such a way as to open the pilot stage by elastically deforming during actuation of the actuating element.

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