Torque control device for an adjustable hydropump

Details Torque control device for an adjustable hydropump Torque control device for an adjustable hydropump

1984-12-14

1987-05-26

Croyle, Carlton R.

Pumps

Condition responsive control of drive transmission or pump...

Having condition responsive pumped fluid control

417218, 417222, F04B 4900, F04B 126

Patent

active

046681710

ABSTRACT:
A torque control device for an adjustable hydropump is described which is based on an output control device in which the output control is determined as a function of the output pressure of the hydropump and a pressure in a working pressure control line. For this purpose a torque valve is provided whose closure power is determined by a measuring spring or set of springs connected with the pump control member and pretensioned depending on the output setting. The torque valve connects the working pressure control line with the pressureless outlet depending on the pressure in the working pressure control line and the pretension of the measuring spring. The torque valve can be fixed on to the hydropump as a separate unit and the control characteristic can be changed from outside by adjustment of the measuring spring.

REFERENCES:
patent: 3635021 (1972-01-01), McMillen et al.
patent: 3669570 (1972-06-01), Himmler
patent: 3768928 (1973-10-01), Miller et al.
patent: 3935707 (1976-02-01), Murphy et al.
patent: 4132506 (1979-01-01), Dantlgraber
patent: 4348159 (1982-09-01), Acheson

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