Radial plunger pump driven by a motor having seal members for pr

Details Radial plunger pump driven by a motor having seal members for pr Radial plunger pump driven by a motor having seal members for pr

1987-08-03

1988-10-11

Croyle, Carlton R.

Pumps

Three or more cylinders arranged in parallel, radial, or...

Motor driven

417273, 92 58, 277 59, 277 68, 277186, 277189, F04B 104, F16J 1500

Patent

active

047767685

ABSTRACT:
A radial plunger pump is provided which includes a motor housing having a motor mounted therein. A pump housing is further provided and has a pump portion defined therein. A shaft is mounted between the motor and the pump portion so that the pump portion operates when rotation of the motor is transmitted to the pump portion by rotation of the shaft. A constant pressure chamber is defined between a first seal member and a second seal member both of which are fixed to the pump housing. The leakage of oil from the pump housing toward the motor housing is prevented by the first and second seal members and the constant pressure chamber. Further, a plate is provided within the constant pressure chamber which rotates with the shaft and prevents the entry of foreign objects into the constant pressure chamber through a constant pressure port which communicates to the ambient atmosphere.

REFERENCES:
patent: 2303232 (1942-11-01), Rupp
patent: 3639085 (1972-02-01), Bertsch et al.
patent: 3874271 (1975-04-01), Eickmann
patent: 4026563 (1977-05-01), Bainard
patent: 4201521 (1980-05-01), Carlson
patent: 4244279 (1981-01-01), Stewart et al.
patent: 4494761 (1985-01-01), Surace et al.
patent: 4555223 (1985-11-01), Budecker et al.
patent: 4627793 (1986-12-01), Kuroyanagi et al.
patent: 4643652 (1987-02-01), Eberhardt
patent: 4652215 (1987-03-01), Kuroyanagi et al.
patent: 4681023 (1987-07-01), Eickmann

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