Gear pump with improved shaft seal

Details Gear pump with improved shaft seal Gear pump with improved shaft seal

1979-08-01

1981-10-06

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

418149, 418206, 277 27, 308 363, F04C 218, F04C 1500, F16J 1546, F16C 3374

Patent

active

042932912

ABSTRACT:
A gear pump for pumping hydraulic fluid includes housing, a pair of gears mounted for rotation within the housing, and a drive shaft affixed to one of the gears for transmitting a rotational input force to that gear. The drive shaft includes a portion extending outwardly beyond the housing. A bushing is provided surrounding the drive shaft and secured to the housing so that the drive shaft is free to rotate within the bushing. The bushing is positioned along the drive shaft between the driven gear and the portion of the drive shaft that extends beyond the housing. The bushing includes an end surface facing the driven gear and an annular recess in the end surface adjacent the drive shaft. A dynamic sealing member is positioned within the annular recess for minimizing the amount of leakage of the pumped fluid along the drive shaft.

REFERENCES:
patent: 2246805 (1941-06-01), Marshall
patent: 2391577 (1945-12-01), Larson
patent: 2660958 (1953-12-01), Lauck
patent: 2772928 (1956-12-01), Schulz et al.
patent: 2798005 (1957-07-01), Love
patent: 2857213 (1958-10-01), Meier
patent: 3104616 (1963-09-01), Peet
patent: 3350985 (1967-11-01), Ackley
patent: 3472170 (1969-10-01), Eckerle
patent: 3494677 (1970-02-01), Arnis
patent: 3663076 (1972-05-01), Valente
patent: 3776611 (1973-12-01), Jentsch
patent: 3827837 (1974-08-01), Pattas et al.
patent: 3945779 (1976-03-01), Vlemmings et al.

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