Two-stage gear pump with improved spur gear mounting

Details Two-stage gear pump with improved spur gear mounting Two-stage gear pump with improved spur gear mounting

1989-09-27

1990-09-25

Vrablik, John J.

Rotary expansible chamber devices

Moving cylinder

Rotating

403354, 403356, F04C 210, F16B 300

Patent

active

049589970

ABSTRACT:
A two-stage gear pump with two gear sets each having a spur gear telescoped onto a slotted drive shaft with a press fit and also positively keyed to the shaft. An annular groove is formed around the shaft adjacent the closed end of the slot in the shaft and enables the slot to be relatively short in axial length so as to reduce manufacturing problems and to enhance the press fit between the shaft and the first stage spur gear.

REFERENCES:
patent: 4171939 (1979-10-01), Harwath
patent: 4685871 (1987-08-01), Harwath
patent: 4728271 (1988-03-01), Harwath

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