Transition valving by means of non-return valves

Details Transition valving by means of non-return valves Transition valving by means of non-return valves

2005-05-03

2005-05-03

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

C418S171000, C418S270000

Reexamination Certificate

active

06887054

ABSTRACT:
A rotary fluid pressure device has a first oil passage with relatively high pressure fluid therein surrounding the gear set; a plurality of second oil passageways connecting the first oil passageway to the expanding and contracting oil chambers; and fluid non-return valves in each of the second oil passageways to permit the flow of oil therethrough only in a direction from the oil chambers to the first oil passageway.

REFERENCES:
patent: 3514234 (1970-05-01), Albert et al.
patent: 3775031 (1973-11-01), Hansen et al.
patent: 3778198 (1973-12-01), Giversen
patent: 3865519 (1975-02-01), Lepelletier
patent: 3892503 (1975-07-01), Getman
patent: 3907465 (1975-09-01), Dorff et al.
patent: 4767292 (1988-08-01), Kinder
patent: 412403 (1991-02-01), None
patent: 412403 (1991-02-01), None

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