Surgery – Truss – Perineal
Patent
1981-04-24
1985-04-23
Howell, Kyle L.
Surgery
Truss
Perineal
310 23, A61H 100
Patent
active
045123390
ABSTRACT:
A percussor apparatus employing a reciprocal motor with improved performance characteristics is disclosed. The reciprocal motor is comprised of an armature, a solenoid or coil, a magnetic frame encompassing the armature and solenoid, and means for resiliently holding the armature in a position partially outside a magnetic field produced by the solenoid when an appropriate electrical signal is applied to the solenoid. Resilient bumpers which limit the travel of the armature as it reciprocates are disposed in a manner which enable the magnetic frame to form a substantially complete magnetic circuit for the magnetic field.
Additionally, a bearing surface formed at the solenoid armature interface is adapted to allow the armature to reciprocate, and substantially eliminate any rotation of the armature about its longitudinal axis. Power supply means utilizing solid state technology is mounted within the housing containing the reciprocal motor. Thermal protection means comprising a flashing warning light and a shut off switch are also provided.
REFERENCES:
patent: 608175 (1898-08-01), Casler
patent: 1837197 (1931-12-01), Berman
patent: 3096758 (1963-07-01), Savage
patent: 3517360 (1970-06-01), Gray
patent: 3643117 (1972-02-01), Alger
patent: 4069816 (1978-01-01), Yamamura
patent: 4280161 (1981-07-01), Kuhn et al.
patent: 4325222 (1982-04-01), Nakamura et al.
Howell Kyle L.
Jaworski Francis J.
McShirley Products, Inc.
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