Fluid pump

Details Fluid pump Fluid pump

1979-04-25

1980-11-11

Freeh, William L.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Cylinders parallel to rotation axis

F01B 1304

Patent

active

042325870

ABSTRACT:
A hydraulic pump or motor device comprises a rotatable barrel containing a plurality of coaxially aligned pistons operably connected to an adjustably inclinable swash plate. The barrel is connected to a drive shaft through a concentrically disposed torque tube having two pairs of splined couplings which each incorporate a spherically profiled male spline element. In operation, the swash plate, barrel and drive shaft are subjected to unbalanced reaction forces concentrated in the semicircle of barrel rotation corresponding to the pumping strokes of the pistons. These unbalanced forces cause bowing or radial deflection of the drive shaft which is compensated by the motion freedom of the spherically splined couplings.

REFERENCES:
patent: 2642810 (1953-06-01), Robinson
patent: 2925046 (1960-02-01), Budzich
patent: 3046906 (1962-07-01), Budzich
patent: 3126835 (1964-03-01), Kline
patent: 3160109 (1964-12-01), Kline
patent: 3285193 (1966-11-01), Jeannin
patent: 3861276 (1975-01-01), Lucien et al.

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