Controls for hydrostatic systems

Details Controls for hydrostatic systems Controls for hydrostatic systems

1981-11-24

1985-01-29

Garrett, Robert E.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of...

60447, F16D 3300, F16D 3302

Patent

active

044957661

ABSTRACT:
In a control for a hydrostatic drive system with a primary energy source and with an adjustable pump and at least one adjustable consumer of hydrostatic energy and with a pump adjusting piston connected with the adjusting element of the pump and capable of sliding in a pump adjustment cylinder, where the load on the pump adjustment cylinder is regulated by means of a servo control valve, also with a constant pump connected to the drive shaft of the pump, the delivery line of which leads to a restrictor and to which a signal-pressure line is connected in front of the restrictor, where the pressure-signal present in it regulates a relief valve jet, which in turn is located in a control-signal line, the improvement characterized in that an additional restrictor is located in the control-signal line and means are provided for switching the pressure gradient in it to the servo control valve.

REFERENCES:
patent: 2238061 (1941-04-01), Kendrick
patent: 3935707 (1976-02-01), Murphy et al.
patent: 4017218 (1977-04-01), Burk et al.
patent: 4203290 (1980-05-01), Burckardt

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