Pumps – Condition responsive control of drive transmission or pump... – Plural pumps with individual or relative control
Patent
1981-06-15
1983-12-13
Look, Edward W.
Pumps
Condition responsive control of drive transmission or pump...
Plural pumps with individual or relative control
417223, 417319, 417364, F04B 4900
Patent
active
044202890
ABSTRACT:
The invention concerns a system for successively producing fluid flows at staggered values. This system includes for example an epicycloidal differential of which a shaft is coupled to an engine, and the other two shafts to two pumps respectively producing the maximum necessary flow and producing the minimum flow; to each pump is connected a brake; when the circuit, for example a jack, fed by this system becomes saturated, the pressure of the fluid sent by the high flow pump increases and reaches a threshold detected by a pressure detector-switch, the latter applies the brake which stops the pump and releases the brake of the other pump. The invention is applicable for example to feeding hydraulic jacks, in particular for turboshaft engines.
REFERENCES:
patent: 906659 (1908-12-01), Richards
patent: 2779291 (1957-01-01), Albright
patent: 2781727 (1957-02-01), Marshall et al.
patent: 2821698 (1958-01-01), Richardson
patent: 2992769 (1961-07-01), Manzanera
patent: 3083570 (1963-04-01), Truman
patent: 3155040 (1964-11-01), Shurts et al.
patent: 3985468 (1976-10-01), Lewis
Look Edward W.
Societe Nationale d'Etude et de Construction de Moteurs d'Aviati
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