Power transmission

Details Power transmission Power transmission

1986-12-24

1988-03-08

Croyle, Carlton R.

Pumps

Condition responsive control of pump drive motor

Plural pumps having separate drive motors, supply sources,...

417216, 417271, 417356, 417410, 417426, F04B 4106, F04B 2504

Patent

active

047297174

ABSTRACT:
An electric motor driven inline hydraulic apparatus comprises a common housing, a stationary shaft mounted in said housing and spaced pump cylinder block subassemblies that rotate around and are mounted on said shaft. Each subassembly includes a cylinder block and a plurality of circumferentially spaced pistons. The cylinder block subassemblies are positioned such that the pistons of one subassembly extend toward the other subassembly. A common yoke plate is mounted between the two cylinder blocks and bears the two groups of piston shoes, one on each of its two bearing surfaces. Each cylinder block is driven independent of and in direction opposite to the other by an electric motor integrally mounted such that its hollow rotor houses the block and drives it. All components described above are contained in one housing and operate submerged in hydraulic fluid.

REFERENCES:
patent: 1019521 (1912-03-01), Pratt
patent: 2373723 (1945-04-01), Wahlmark
patent: 3183845 (1965-05-01), Tyler
patent: 3295457 (1967-01-01), Oram
patent: 3306209 (1967-02-01), Tyler
patent: 3627451 (1971-12-01), Kouns

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