Ultrasonic scanning apparatus

Details Ultrasonic scanning apparatus Ultrasonic scanning apparatus

1984-11-29

1986-05-13

Howell, Kyle L.

Surgery

Truss

Pad

73633, 73634, 310 36, A61B 1000

Patent

active

045879710

ABSTRACT:
An ultrasonic scanning apparatus includes a rotor, first and second electromagnetic stators, and an ultrasonic transducer mounted on the rotor. Each electromagnetic stator has two curved pole faces arranged opposite pole faces on the rotor. The electromagnetic stators are arranged on opposite sides of the axis of rotation of the rotor. The stator pole faces are tapered such that on rotation of the rotor in one direction, the gaps between the rotor and a first stator decrease while the gaps between the rotor and the other stator increase. On rotation of the rotor in the opposite direction, the gaps between the rotor and the first stator increase and the gaps between the rotor and the second stator decrease. Means are provided for alternately energizing the first and second electromagnetic stators to cause the rotor to oscillate about the axis of rotation.

REFERENCES:
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patent: 3956678 (1976-05-01), Byrne et al.
patent: 3959672 (1976-05-01), Walker et al.
patent: 4013911 (1977-03-01), Fujiwara et al.
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patent: 4164722 (1979-08-01), Garvey
patent: 4257272 (1981-03-01), Sloman
patent: 4398425 (1983-08-01), Matzuk
patent: 4399703 (1983-08-01), Matzuk
patent: 4433691 (1984-02-01), Bickman
patent: 4479388 (1984-10-01), Matzuk
patent: 4515017 (1985-05-01), McConaghy

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