Rotary actuator

Details Rotary actuator Rotary actuator

1995-10-25

1997-06-03

Denion, Thomas E.

Expansible chamber devices

Rectilinearly moving working member and coaxial or parallel...

Element extends through working member portion

92 32, 92 5R, 744248B, 74 89, F01B 300

Patent

active

056343906

ABSTRACT:
Disclosed is a rotary actuator utilizing magnetic screws which are stably rotatable at a great torque with little torque variation. The rotary actuator comprising (a) a closed hollow cylinder, a piston sliding within the cylinder, and a rotary shaft which rotates with the sliding of the piston, has (b) a first magnetic screw member which makes a linear motion in synchronism with the sliding of the piston, and is provided with a first spiral magnetized band, and (c) a rotary shaft rotatably supported in relation to the first magnetic screw member, and having a second magnetic screw provided with a second spiral magnetized band. (d) With the sliding of the piston, the second magnetic screw receives the magnetic force from the first magnetic screw to thereby rotate the rotating shaft.

REFERENCES:
patent: 4590816 (1986-05-01), Weyer
patent: 5203222 (1993-04-01), Hirai
patent: 5241895 (1993-09-01), Weyer
patent: 5299489 (1994-04-01), Obrecht et al.
patent: 5456134 (1995-10-01), Bouwer et al.
H 1191 U.S. Statutory Invention Registration Jun. 1993 (Hutchison et al).

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