Power plants – Pressure fluid source and motor – Having condition responsive control in a system of...
Reexamination Certificate
2007-03-12
2010-02-23
Leslie, Michael (Department: 3745)
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of...
C060S429000, C060S484000, C060S486000
Reexamination Certificate
active
07665299
ABSTRACT:
A machine having a hydraulic power management system. The machine includes an internal combustion engine driving first and second fixed displacement pumps to produce a combined flow of pressurized fluid. Main and auxiliary implements are operable in response to a flow of pressurized fluid, and a control valve selectively directs the combined flow to the main and auxiliary implements. A power management system is operable to stop the flow of pressurized fluid to the main implement from the second pump when the pressure of the combined flow exceeds a pressure indicative of the impending engine stall. A means for providing the combined flow to the auxiliary implement without regard to the pressure of the combined flow is also provided, and may take the form of a power management override or bypass mechanism.
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Search Report and Written Opinion dated Jul. 10, 2008 for International application No. PCT/US2008/003161, filed Mar. 11, 2008.
Schuh Scott N.
St. Aubin Joseph A.
Clark Equipment Company
Leslie Michael
Veldhuis-Kroeze John D.
Westman Champlin & Kelly P.A.
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