Pumps – Condition responsive control of drive transmission or pump... – Plural pumps with individual or relative control
Patent
1976-02-09
1976-12-28
Freeh, William L.
Pumps
Condition responsive control of drive transmission or pump...
Plural pumps with individual or relative control
60428, 60451, 60452, 60486, F04B 4908, F16D 3102
Patent
active
039998924
ABSTRACT:
A pump assembly having at least two variable displacement pumps each having a separate pump control assembly are interconnected for control in response one to the other. Each pump control assembly has first and second biasing means acting on a respective swash plate. The first and second biasing means have interconnecting fluid pathways formed through a pump control housing. Means are provided within the housings for modifying the discharge pressures of the separate pumps to provide a resultant pressure signal for controlling the second biasing means.
REFERENCES:
patent: 3767327 (1973-10-01), Wagenseil
patent: 3797245 (1974-03-01), Hein
patent: 3891354 (1975-06-01), Bosch
patent: 3941514 (1976-03-01), Louis et al.
Caterpillar Tractor Co.
Freeh William L.
Hart Frank L.
La Pointe G. P.
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