Pump for pumping fluid without vacuum boiling

Details Pump for pumping fluid without vacuum boiling Pump for pumping fluid without vacuum boiling

1992-11-02

1993-11-23

Gluck, Richard E.

Rotary expansible chamber devices

With plural working fluid inlet or outlet passages

418171, F04C 210, F04C 1502

Patent

active

052638189

ABSTRACT:
A pump comprises an outer rotor and an inner rotor. A plurality of pressure chambers are defined between the outer rotor and the inner rotor to cause fluid to be sucked from a suction port and discharged to a discharge port by the movement of these pressure chambers with changing their volumes. A pressure relief passage is opened between the discharge port and the suction port and communicated directly with a fuel tank provided outside the pump. This causes the pressure in the pressure chamber to be reduced before the pressure chamber is communicated with the suction port. In consequence, it is possible to prevent the fuel of discharge pressure in the pressure chamber from being brought in the suction port, thereby preventing the generation of vapor caused due to vacuum boiling and the reduction of discharge rate.

REFERENCES:
patent: 2948229 (1960-08-01), Brundage
patent: 3237566 (1966-03-01), Roenick
patent: 3242867 (1966-03-01), Mosbacher
patent: 3834842 (1974-09-01), Dorff et al.
patent: 4493620 (1985-01-01), Takei et al.
patent: 4540354 (1985-09-01), Tuckey
patent: 4596519 (1986-06-01), Tuckey
patent: 4697995 (1987-10-01), Tuckey

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