Gear pump or motor

Details Gear pump or motor Gear pump or motor

2006-12-19

2006-12-19

Nguyen, Hoang (Department: 3748)

Rotary expansible chamber devices

Interengaging rotating members

Like rotary members

C418S206400, C418S134000

Reexamination Certificate

active

07150612

ABSTRACT:
A gear•rear shaft containing main body of a bottomed type is penetrated with a bearing hole and a rear face of the gear•rear shaft containing main body is coupled with a closing plate to form an airtight seal from an outside environment. Shafts extended from two gears to a side of the rear face are set to be shorter than a length of the bearing hole in an axis core direction. Bushes are also set to a length that is the same as that of the shafts. The gear•rear shaft containing main body is formed with a recess portion at the rear face and the bearing hole is penetrated to open to the recess portion. The gear•rear shaft containing main body is bored to penetrate with a low pressure port communicating with a low pressure region in an axis core direction.

REFERENCES:
patent: 3076413 (1963-02-01), Hoffer
patent: 3113524 (1963-12-01), Fulton
patent: 4940394 (1990-07-01), Gibbons
patent: 5052905 (1991-10-01), Rustige
patent: 5496163 (1996-03-01), Griese et al.
patent: 5692888 (1997-12-01), Truninger
patent: 6991442 (2006-01-01), Meguro
patent: A-8-121351 (1996-05-01), None

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