Abstract: Apparatus for treating neoplasms in humans and animals comprising a hollow toroidal applicator which resonates at a specific radiofrequency, and which possess electrically conductive walls on which radial radiofrequency currents flow and generate a high density of uninterrupted magnetic flux within the hollow body. A rotatable antenna connected to a source of radiofrequency power is mounted inside the applicator body to couple with the electromagnetic field of the applicator. The body part to be treated is interposed through side apertures or through the space created by removing a segment of the toroid which can have orifices of predetermined cross sectional areas across which a tubular zone of high magnetic flux travels through the interposed tumor and normal tissue to induce more heat in the interposed tumor tissue than in the interposed normal tissue.
June 1, 1989
Date of Patent:
March 31, 1992
Harry H. LeVeen
Cafiero Franconi, Carlo A. Tiberio, Harry H. LeVeen
Abstract: Automatic impedance matching apparatus in which a matching unit is connected between a radio frequency source and a load and which comprises variable capacitors and inductor, the capacitors being varied by stepping motors to match the impedance presented to the source to the impedance of the source. The stepping motors are controlled by a circuit which generates trains of pulses corresponding to the forward wave voltage and the reflected wave voltage on a line between the source and the matching unit and provides a train of pulses corresponding to the ratio of the voltages. The pulse rates of trains of pulses corresponding to the ratio, before and after a capacitor is varied, are compared, and the sign of the difference between the pulse rates is used to select a motor and step it in the direction which will cause the variable capacitor connected thereto to change its reactance in a direction which will increase the ratio between the forward and reflected wave voltages.
Abstract: An electrostatic shield for an induction coil of a short-wave diathermy unit in the form of radial conductors arranged in a plane with a common point at their center which is grounded. The shield is positioned perpendicularly to the axis of the induction coil between the patient and coil.
Abstract: An intraocular lens and method for implanting the same in the posterior chamber of an eye having a posterior capsule. The lens has a lens support system including anterior supports which allows it to be placed in the anterior chamber of the eye against the iris and posterior supports which extend down into the posterior chamber and capsule for capsular fixation. After capsular fixation has occurred the pupil and iris of the eye is dilated, so that the anterior supports do not engage the iris. Upon reconstriction of the pupil the iris rides back over the anterior supports and over the face of the lens, positioning the lens in the posterior chamber with the lens being mounted in the chamber by the support system.
May 14, 1979
Date of Patent:
August 25, 1981
Harry H. LeVeen
Kurt A. Morcher, Leo H. Loones, Cornelius D. Binkhorst
Abstract: A method for inducing local hyperthermia in treatment of a tumor by short wave diathermy which involves moving an induction coil over the portion of the body containing the tumor such that the axis of the coil constantly transects different portions of the tumor.