Pumps – Condition responsive control of drive transmission or pump... – Plural pumps with individual or relative control
Patent
1977-01-24
1978-09-19
Croyle, Carlton R.
Pumps
Condition responsive control of drive transmission or pump...
Plural pumps with individual or relative control
60428, 60447, F04B 4900
Patent
active
041150333
ABSTRACT:
A hydraulic system having at least two pumps including a variable-displacement pump and a constant-displacement pump, both driven from a common prime mover, includes a control-pressure pump operated by the shaft of the prime mover and operating with its input a valve which controls the pressure of a control piston acting upon a spring which bears upon the control member in a direction opposite to its setting piston. A cylinder of the setting piston is connected to the output of the adjustable-displacement pump.
REFERENCES:
patent: 3625637 (1971-12-01), Kiwalle et al.
patent: 3841795 (1974-10-01), Ferre et al.
patent: 3935706 (1976-02-01), Stevens
patent: 3963378 (1976-06-01), McMillan
Ahrens Gerd
Kleineisel Gustav
Kuchenbecker Dietrich
Croyle Carlton R.
Linde Aktiengesellschaft
Look Edward
Ross Karl F.
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