Rotary expansible chamber devices – With plural working fluid inlet or outlet passages
Patent
1982-05-25
1985-05-14
Vrablik, John J.
Rotary expansible chamber devices
With plural working fluid inlet or outlet passages
418102, 418267, 418270, F04C 200, F04C 1502
Patent
active
045169187
ABSTRACT:
An improved pump assembly includes a plurality of pumping elements which rotate with a rotor and engage an inner surface of a cam ring to define pumping chambers which hold liquid and/or air. As the pumping chambers move along an inlet arc, liquid flows through an orifice to the chambers. The orifice restricts the rate of flow of liquid to the pumping chambers to a flow rate which is insufficient to fill the chambers with liquid during high speed rotation of the rotor. As the pumping chambers move along an outlet arc which has a constant slope toward the rotor, the volume of each pumping chamber is decreased. When the fluid pressure in the pumping chamber exceeds a pump discharge pressure, one of a series of a check valves opens and fluid is discharged from the pumping chamber. The check valves are resiliently deflectable spring fingers which are connected with an end plate of the pump assembly and are urged toward the closed position by a fluid pressure force which varies as a function of variations in pump discharge pressure. Bearings for supporting the rotor are lubricated by a flow of liquid from the pumping chambers through passages formed between the rotor and the end plates.
REFERENCES:
patent: 2832199 (1958-04-01), Adams et al.
patent: 2861517 (1958-11-01), Neff
patent: 3368799 (1968-02-01), Sluijters
patent: 3385513 (1968-05-01), Kilgore
patent: 3424094 (1969-01-01), Clark et al.
patent: 3714969 (1973-02-01), Hanning
patent: 3790307 (1974-02-01), Aldinger
patent: 3852003 (1974-12-01), Adalbert et al.
patent: 3900277 (1975-08-01), Newton
patent: 3981641 (1976-09-01), D'Amato
patent: 4080124 (1978-03-01), Drutchas et al.
patent: 4345886 (1982-08-01), Nakayama et al.
patent: 4384828 (1983-05-01), Rembold et al.
patent: 4443169 (1984-04-01), Merz
Literature re ZF Radial Piston Pump.
Drutchas Gilbert H.
Spencer Phillip B.
Olds T.
TRW Inc.
Vrablik John J.
LandOfFree
Pump assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pump assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pump assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-766444