Power plants – Pressure fluid source and motor – Methods of operation
Patent
1997-11-04
1999-06-29
Ryznic, John E.
Power plants
Pressure fluid source and motor
Methods of operation
60443, 60453, F16H 3902
Patent
active
059161388
ABSTRACT:
A hydrostatic transmission with a closed hydraulic circuit includes a consumer which is connected through work lines to a reversible hydraulic pump and is pressurized on both sides by an external pressure source. The hydraulic circuit includes a first continuous rinsing and feeding circuit which depends on the leakage flow of the hydraulic pump and possibly a second discontinuous rinsing circuit separate from the first circuit and connected to the external pressure source. The hydrostatic transmission further includes an adjustable regulating device which determines through a valve the adjustment of the hydraulic pump. The regulating device, which may be arranged outside of the immediate vicinity of the hydrostatic transmission, interacts with a control device which is directly assigned to the hydrostatic transmission and includes a valve constructed as a servo valve, wherein, for adjusting the arrangement, the servo valve can be switched to manual control. A manually operable lock valve is provided between the servo valve and the hydraulic pump adjustment. The throttles used for pressurization are adjustable as well as lockable and the work lines are equipped with pick-ups for the actual pressure value.
REFERENCES:
patent: 4368798 (1983-01-01), Meyerle et al.
patent: 4528813 (1985-07-01), Izumi et al.
patent: 5211015 (1993-05-01), Schroeder
patent: 5493860 (1996-02-01), Bjerke et al.
Hild Berthold
Stotzel Helmut
Kueffner Friedrich
Ryznic John E.
SMS Schloemann--Siemag Aktiengesellschaft
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