Pumps – Condition responsive control of drive transmission or pump... – Plural pumps with individual or relative control
Patent
1978-02-23
1980-07-15
Croyle, Carlton R.
Pumps
Condition responsive control of drive transmission or pump...
Plural pumps with individual or relative control
60430, 60486, 417222, F04B 4900
Patent
active
042125960
ABSTRACT:
Variable displacement pumps are each provided with internal biasing means which adjusts displacement in response to spring forces, discharge pressures and net swivel torque forces in order to limit output pressure and to avoid overtaxing the power output capabilities of the motor which drives the pumps. In a system where a plurality of such pumps each supply a separate fluid-operated device but are driven by a single motor, the internal displacement control means of each pump may be arranged to be responsive in part to the discharge pressure of each other pump. The pumps may operate at different power output levels and if one experiences a relatively heavy load, the displacements of the others also reduce if necessary to avoid exceeding the power limitations of the drive motor from a total system overload.
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Caterpillar Tractor Co.
Croyle Carlton R.
Look Edward
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