Feed-screw unit and electric motor using same

Details Feed-screw unit and electric motor using same Feed-screw unit and electric motor using same

1997-03-13

1999-06-15

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 83, 310 43, 310254, H02K 706

Patent

active

059125209

ABSTRACT:
A feed-screw unit includes a rotor formed with a female screw, and a reciprocating shaft disposed inside the rotor to be moved forward and backward in the axial direction of the rotor in accordance with rotation thereof. The reciprocating shaft includes a male screw with a first portion to be in engagement with the female screw of the rotor and a second portion to be in non-engagement therewith.

REFERENCES:
patent: 3660704 (1972-05-01), Paine et al.
patent: 4136571 (1979-01-01), Frolichsthal
patent: 4751411 (1988-06-01), Fukaya et al.
patent: 5517070 (1996-05-01), Schmidt
patent: 5727307 (1998-03-01), Gstohl et al.

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