Ultrasonic transducer probe assembly

Details Ultrasonic transducer probe assembly Ultrasonic transducer probe assembly

1988-10-24

1990-04-03

Jaworski, Francis

Surgery

Truss

Pad

73634, A61B 800

Patent

active

049131559

ABSTRACT:
A transducer is pivoted by a linear motor having an electrical coil as the reciprocally moving member. The coil is in a plane orthogonal to the lines of magnetic flux between opposed permanent magnets of opposite polarity affixed to the probe case, providing efficiency. A mechanical linkage between the linear motor electrical coil moving member and the transducer which is forced in pivoting motion transmits only axial force, and not torque, by employing a ball and socket joint at one end of a crankshaft. Electrical connections to the electrical coil are facilitated through springs which additionally mechanically bias the reciprocal movement of the coil. Electrical connections to the pivoting transducer are facilitated through a helical coil wrapping the pivot shaft. These electrical connections accomodate mechanical motions within the probe. A bellows-fold cylindrical air bladder is positioned within the fluid chamber of the probe to allow for thermally-induced changes in fluid volume.

REFERENCES:
patent: 3955561 (1976-05-01), Eggleton
patent: 4092867 (1978-06-01), Matzuk
patent: 4282879 (1981-08-01), Kunin et al.
patent: 4421118 (1983-12-01), Dow et al.
patent: 4545117 (1985-10-01), Okamoto
patent: 4785819 (1988-11-01), Pearce

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