Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Reexamination Certificate
2011-08-16
2011-08-16
Leslie, Michael (Department: 3745)
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
C060S469000
Reexamination Certificate
active
07997073
ABSTRACT:
A hydraulic control system for controlling preferably at least two consumers, has a pump supplying the consumers with a pressure medium and having an adjustable pump capacity, an adjustable metering orifice assigned to each of the consumers, a power-beyond connection to which at least one power-beyond consumer is attachable, an inlet pressure scale connected downstream of the pump and provided in a pressure medium flow path between the pump and at least one of the two consumers, wherein the power-beyond connection branches off in the pressure medium flow path between the pump and the inlet pressure scale, a spring with a force acting upon the inlet pressure scale in a closing direction, an inlet having a pressure acting upon the inlet pressure scale in an opening direction, wherein the inlet pressure scale is configured so that it is actable upon in the closing direction selectively by either a highest load pressure or by a pressure that is greater than the highest load pressure.
REFERENCES:
patent: 5129230 (1992-07-01), Izumi et al.
patent: 5493861 (1996-02-01), Friedrichsen
patent: 6405529 (2002-06-01), Berg et al.
patent: 7870728 (2011-01-01), Keuper et al.
patent: 2009/0007556 (2009-01-01), Djurovic et al.
patent: 10 2006 008 940 (2007-08-01), None
Djurovic Milan
Keuper Gerhard
Loedige Heinrich
Stachnik Peter
Leslie Michael
Robert & Bosch GmbH
Striker Michael J.
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