Integrated electric motor driven inline hydraulic apparatus

Details Integrated electric motor driven inline hydraulic apparatus Integrated electric motor driven inline hydraulic apparatus

1992-06-17

1993-06-15

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

417271, H02K 510, F04B 100

Patent

active

052202259

ABSTRACT:
An integrated electric motor driven inline hydraulic apparatus comprising a housing, an electric motor having a stator fixed to the housing and a rotor surrounded by the stator. A positive displacement hydraulic pump comprises a cylinder block supported on bearings in the housing and includes a plurality of circumferentially spaced through bores in the cylinder block. A pair of opposing pistons reciprocate in each cylinder bore, the pistons extending from the cylinder block to cooperate with inclined surfaces which induce reciprocation of the pistons with cylinder block rotation. A valve is adapted to alternately connect the chambers between the opposing sets of pistons with a fluid inlet and a fluid outlet during cylinder block rotation. The housing has a hydraulic fluid inlet adjacent one end thereof such that hydraulic fluid from the inlet flows over the stator, air gap between the stator and rotor and over the rotor. The pump has an inlet such that hydraulic fluid therefor flows to the inlet of the pump and an outlet of hydraulic fluid from the pump to the hydraulic system supplied by the pump.

REFERENCES:
patent: 1019521 (1912-03-01), Pratt
patent: 3672793 (1972-06-01), Yowell
patent: 4575315 (1986-03-01), Galais et al.
patent: 4729717 (1988-03-01), Gupta
patent: 4850812 (1989-07-01), Voight
patent: 5073091 (1991-12-01), Burgess et al.

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