Torque limiting control

Details Torque limiting control Torque limiting control

1977-07-11

1980-03-11

Croyle, Carlton R.

Pumps

Condition responsive control of drive transmission or pump...

Plural pumps with individual or relative control

417222, F04B 4900

Patent

active

RE0302260

ABSTRACT:
A torque limiting control for a pair of variable displacement hydraulic pumps having displacement varying means and servo means including springs urging each of the displacement varying means to a position for maximum pump displacement and fluid operated means acting in opposition to the springs to shift said displacement varying means for reduction in pump displacement, said control including means for summing the fluid pressures generated by both pumps and controlling the servo means for the two pumps to progressively move the displacement varying means for reduction of pump displacement as the sum of the fluid pressures rises above a predetermined value at a certain pump displacement and thereby limit the sum of the torques required by said pumps.

REFERENCES:
patent: 3017750 (1962-01-01), Kempson
patent: 3093081 (1963-06-01), Budzich
patent: 3232238 (1966-02-01), Faisander
patent: 3302585 (1967-02-01), Adams et al.
patent: 3510231 (1970-05-01), Bobst
patent: 3637327 (1972-01-01), Kubiak
patent: 3669570 (1972-06-01), Himmler
patent: 3723026 (1973-03-01), Soyland et al.
patent: 3732036 (1973-05-01), Busbey et al.

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