Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Reexamination Certificate
2004-09-09
2008-10-14
Lazo, Thomas E (Department: 3745)
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
C060S484000, C091S517000
Reexamination Certificate
active
07434393
ABSTRACT:
Disclosed are a control arrangement and a method for the pressure medium supply of at least two hydraulic consumers that are supplied with pressure medium through the intermediary of a variable displacement pump. In the pressure medium flow path between the consumers and the variable displacement pump a respective meter-in orifice is provided. An adjustment of the variable displacement pump and of the meter-in orifices takes place electronically through the intermediary of a control means in dependence on the target values input by an operator. In accordance with the invention, the meter-in orifice associated with the consumer having the highest load pressure is controlled to open completely, so that the pressure loss across this meter-in orifice is minimum.
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Hans Esders, “Olhydraulik und Pneumatik”, vol. 38, No. 8, pp. 473-480, 1994.
Bosch Rexroth AG
Lazo Thomas E
Oliff & Berridg,e PLC
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