Variable hydraulic pumping apparatus

Details Variable hydraulic pumping apparatus Variable hydraulic pumping apparatus

1974-04-16

1976-02-03

Freeh, William L.

Expansible chamber devices

Displacement control of plural cylinders arranged in...

Parallel cylinders

91504, F01B 300

Patent

active

039357961

ABSTRACT:
A hydraulic pumping apparatus including a cylindrical housing member having an open upper end closed by a cover held in place by a snap ring. A rotor is rotatably supported in the housing and in turn supports a plurality of pistons which are parallel to the axis of rotation of the rotor. The novelty resides in the swash plate assembly which includes an off-the-shelf bearing comprising two parallel plates with all bearings sandwiched therebetween with one of the plates engaging the pistons. An integral plastic ring member is disposed within the annular opening of the upper thrust plate of the bearing assembly and includes trunnions extending laterally in opposite directions for disposition in grooves in the cover member for changing the angle of inclination of the bearing assembly. An adjustment member extends through the cover for engaging the upper thrust plate of the bearing assembly to change the angle of the inclination thereof.

REFERENCES:
patent: 2345446 (1944-03-01), Baker
patent: 2842068 (1958-07-01), Sundin
patent: 3266434 (1966-08-01), McAlvay
patent: 3739691 (1973-06-01), Bobier
patent: 3803987 (1974-04-01), Knapp

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