Drive device of variable transmission ratio, particularly for op

Details Drive device of variable transmission ratio, particularly for op Drive device of variable transmission ratio, particularly for op

1985-07-02

1987-06-09

Herrmann, Allan D.

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74774, 192 61, F16H 344, F16D 3104

Patent

active

046711376

ABSTRACT:
The drive device consists of a rotating casing containing a fluid and carrying internally in an idle manner a sun gear and a pair of respective planet gears which mesh with the sun gear and define a gear pump therewith; the fluid is contained in an inner reservoir of the casing, and this latter is provided, in correspondence with the meshing zones between the planet gears and sun gear, with respective intake chambers connected to the reservoir and with delivery chambers closed by automatic valves which are kept closed by the preloading of a spring against a ball and arranged to open at a predetermined pressure in order to connect the delivery chambers to the reservoir. A pneumatic device also controls a respective shut-off valve in order to connect the delivery chambers to the reservoir independently of the opening of the automatic valves.

REFERENCES:
patent: 908365 (1908-12-01), Ward
patent: 2454694 (1948-11-01), Grebb
patent: 2652911 (1953-09-01), Somers
patent: 2921483 (1960-01-01), Colmerauer
patent: 3025877 (1962-03-01), Buckay
patent: 3099926 (1963-08-01), Thorpe
patent: 3380320 (1968-04-01), Zierick
patent: 3404584 (1968-10-01), Trautmann
patent: 3625322 (1971-12-01), Nagamatsu
patent: 3741040 (1973-06-01), Shaw
patent: 4322988 (1982-04-01), Hill

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