Hydraulic machine

Details Hydraulic machine Hydraulic machine

2006-12-08

2010-06-01

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

C418S171000, C418S225000

Reexamination Certificate

active

07726958

ABSTRACT:
A hydraulic machine has a gear wheel (2) with outwardly extending teeth and a gear ring (4) with inwardly extending teeth formed by rollers each of which is supported in a pocket (8) in the gear ring, and pressurized spaces are formed between the gear wheel and the inwardly extending teeth.To keep the wear of the machine small each pocket (8) has at least two different radii (R1, R2, Rn) whereby a radius (R2, Rn) at a smaller displacement from the edge (12) of the pocket is larger than a radius (R1) at a larger displacement from the same edge (12) of the pocket (8).

REFERENCES:
patent: 3915603 (1975-10-01), Swedberg
patent: 3930766 (1976-01-01), Swedberg
patent: 4008015 (1977-02-01), McDermott
patent: 4087215 (1978-05-01), Miller
patent: 1012412 (1977-06-01), None
patent: 2 421 304 (1974-11-01), None
patent: 2732086 (1978-01-01), None

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