Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Reexamination Certificate
2011-03-08
2011-03-08
Lazo, Thomas E (Department: 3745)
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
C060S433000
Reexamination Certificate
active
07900445
ABSTRACT:
Disclosed is a hydraulic system for supplying primary and auxiliary pressure medium consumers with different system pressures, which exceed the load pressure by a pre-determined control pressure differential. Primary load pressure is used to produce a first control pressure differential for operating a primary pressure medium consumer. Auxiliary load pressure is converted in an amplifying device to produce a second, higher control pressure differential for operating an auxiliary pressure medium consumer. The amplifying device consists of a pressure reducing valve, which is permanently adjusted to a pre-determined reduced pressure and has a line conducting the system pressure connected to a first pressure inlet, a load reporting line conducting the load pressure of the auxiliary pressure medium consumer connected to a second inlet and a load reporting line subjecting the pressure control valve to increased load pressure connected to an outlet and the control piston is subjected on its one side to the force of a permanently adjusted spring.
REFERENCES:
patent: 5562019 (1996-10-01), Kropp
patent: 6134887 (2000-10-01), Bertotti
patent: 6220027 (2001-04-01), Heusser
patent: 6644025 (2003-11-01), Oberhausser et al.
patent: 6931847 (2005-08-01), Throckmorton et al.
Agco GmbH
Lazo Thomas E
Schneider, Esq. Ryan A.
Troutman Sanders LLP
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