Hydrostatic transmission pump

Power plants – Pressure fluid source and motor – Cyclically operable reciprocating or oscillating motor or...

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Details

60444, 60456, 60464, 91196, F15B 904, F15B 2104

Patent

active

039396568

ABSTRACT:
An improved hydraulic drive system for a doubleacting hydraulic cylinder which drives or rocks the walking beam of an oil well pump. A closed circuit hydrostatic drive system is used to operate the double-acting hydraulic power cylinder unit and includes a variable displacement reversing swashplate pump driven at a predetermined constant speed by a prime mover such as an electric motor. Suitable automatic control means are provided for synchronizing the reversing movement of the swashplate with the rocking movement of the walking beam.

REFERENCES:
patent: 2286358 (1942-06-01), Geiger
patent: 2961829 (1960-11-01), Weisenbach
patent: 2984985 (1961-05-01), MacMillin
patent: 3236049 (1966-02-01), Reinke
patent: 3369490 (1968-02-01), Hawk
patent: 3528243 (1970-09-01), Cryder et al.
patent: 3559533 (1971-02-01), Maasshoff
patent: 3580138 (1971-05-01), Maasshoff

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