Pumps

Details Pumps Pumps

1979-08-15

1982-08-31

Croyle, Carlton R.

Pumps

Successive stages

Condition responsive control of fluid

60486, 74688, 417286, 417310, 417440, 418 9, 418200, F04B 4900

Patent

active

043470440

ABSTRACT:
A fluid system, especially for a transmission having a hydrodynamic torque converter and a mechanical change speed gear box downstream therefrom. For supplying pressurized fluid to the working chamber of the torque converter, the clutches and brakes of the torque converter and the servomotors which control the gear steps of the downstream mechanical change speed gear box, there is provided a pressure system having first and second low pressure pumps and preferably an auxiliary high pressure pump. The first low pressure pump delivers fluid continuously for delivery to the working chamber of the torque converter and to the servomotors. The second low pressure pump can deliver pressurized fluid through a one way valve to the discharge side of the first low pressure pump or alternatively its output can be bypassed directly to the input of the second low pressure pump. The second low pressure pump provides fluid to the inlet side of the high pressure pump and the high pressure pump delivers high pressure fluid to the servo motors as needed. The three pumps and the passages connecting the same may all be located in a common housing which may be formed as a part of the transmission.

REFERENCES:
patent: 1843246 (1932-02-01), Sloane
patent: 3021790 (1962-02-01), Brunson
patent: 3381891 (1968-05-01), Bellmer
patent: 3412685 (1968-11-01), Connelly
patent: 3431856 (1969-03-01), Whitmore et al.
patent: 3526468 (1970-09-01), Moon et al.
patent: 3850549 (1974-11-01), Hansen
patent: 3985472 (1976-10-01), Virtue et al.
patent: 4056019 (1977-11-01), Ahlen
patent: 4061271 (1977-12-01), Kimbrough
patent: 4184330 (1980-01-01), Polzer et al.
patent: 4199303 (1980-04-01), Gusmer et al.
patent: 4259045 (1981-03-01), Tenyama

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