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Title:
PRESSURE LIMITING VALVE AND CLOSED HYDRAULIC CIRCUIT HAVING A PRESSURE LIMITING VALVE
Document Type and Number:
WIPO Patent Application WO/2013/087156
Kind Code:
A3
Abstract:
Disclosed is a pressure limiting valve arrangement having a pressure limiting valve, preferably a low-pressure limiting valve, having a valve body, onto the first control surface of which a system pressure to be limited is applied in the opening direction, e.g. via a first control line or via a first control connection. In addition, the pressure limiting valve has a spring via which the valve body is pressurised in the closing direction. According to the invention, the valve body has a second control surface onto which system pressure can be applied via a second control line or a second control connection. The system pressure can also act on the second control surface to a reduced or throttled extent. A closed hydraulic circuit with two working lines, into which a feed pump can convey a substitute pressurising agent to make up a shortfall via a supply line, is also disclosed. The supply line can be relieved with various response pressures via a pressure limiting valve arrangement of the type described above.

Inventors:
CAMURDAN HAKAN (DE)
WANNER ROBERT (DE)
GINTER JUERGEN (DE)
VAN AALST DIRK (DE)
GEPRAEGS MARKUS (DE)
Application Number:
EP2012/004996
Publication Date:
August 08, 2013
Filing Date:
December 04, 2012
Export Citation:
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Assignee:
BOSCH GMBH ROBERT (DE)
International Classes:
F15B13/02
Foreign References:
EP2241764A12010-10-20
EP2375083A22011-10-12
DE19640545A11998-04-02
Attorney, Agent or Firm:
THÜRER, Andreas (Zum Eisengießer 1, Lohr am Main, DE)
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