Hydrostatically operated continuously variable transmission

Details Hydrostatically operated continuously variable transmission Hydrostatically operated continuously variable transmission

1989-05-09

1990-11-06

Look, Edward K.

Power plants

Pressure fluid source and motor

Input pump and rotary output motor system having...

60487, F16D 3900

Patent

active

049675567

ABSTRACT:
A hydrostatically operated continuously variable transmission includes a cylinder block centrally coupled to a transmission shaft coupled to an engine, a swash-plate-type axial-piston hydraulic pump having a group of pump plungers, a hydraulic motor having a group of motor plungers, and a closed hydraulic circuit by which the hydraulic pump and the hydraulic motor are interconnected. The groups of pump and motor plungers are disposed in annular patterns in the cylinder block, and disposed concentrically such that one of the groups surrounds the other group. The plunger groups are positionally displaced in the circumferential direction of the cylinder block such that a circle inscribed in said one group passes through the other group.

REFERENCES:
patent: Re24317 (1957-05-01), Schott
patent: 1274391 (1918-08-01), Davis
patent: 2706384 (1955-04-01), Schott
patent: 2984070 (1961-05-01), Bauer
patent: 3161023 (1964-12-01), Margolin et al.
patent: 3165892 (1965-01-01), Roberts
patent: 4444093 (1984-04-01), Koga et al.
patent: 4478134 (1984-10-01), Kawahara et al.
patent: 4741251 (1988-05-01), Hayashi et al.
patent: 4745748 (1988-05-01), Hayashi et al.
patent: 4827721 (1989-05-01), Hayashi et al.

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