Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Thermal applicators
Patent
1994-01-31
1994-12-20
Grieb, William H.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Thermal applicators
A61F 700
Patent
active
053742842
ABSTRACT:
A power control unit for a thermotherapy applicator adapted to direct toward a localized skin area of a patient overlying a problem region, a stream of hot air whose temperature cyclically alternates between a base level above ambient to a peak level above base to produce a pulsatory heat wave which promotes the transfer of heat to the problem region to raise it to an elevated temperature. The applicator includes a fan driven by a d-c motor that blows air through an a-c powered heater coil to produce an air stream whose temperature depends on the velocity of air blown through the coil; the higher the velocity, the lower this temperature. The velocity is a function of the level of d-c voltage applied to the motor by a rectifier connected to a voltage-divider tap on the coil. The power control unit applies a-c power to the heater coil and acts to cyclically alternate the level of d-c voltage applied to the motor from a level corresponding to its rated voltage to a reduced level whereby the resultant air velocity of the air stream alternates from a high velocity to a low velocity to produce the pulsatory heat wave.
REFERENCES:
patent: 3207159 (1965-09-01), Tateisi
patent: 4585002 (1986-04-01), Kissin
patent: 5107832 (1992-04-01), Guibert et al.
Guibert Bettina
Guibert Raul
Ebert Michael
Grieb William H.
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