The Alliance Manufacturing Company, Inc.

Cook Vascular Incorporated

James R Zewe

Louis B Goode

William L Johnson

John M Fruhwald

Barry E Norlander

James B Russell

Carl A Cook

Donald J Bowser

A medical device ( ) such as a radio frequency dilator sheath for separating an encapsulated elongated structure ( ) such as an electrical cardiac lead implanted in biological tissue ( ) such as a vessel leading to or from a patient's heart. The radio frequency dilator sheath includes inner and outer coaxial dilator sheaths ( and ) with respective beveled distal ends ( and ) for mechanically loosening and separating encapsulating tissue from an implanted electric cardiac lead. The beveled distal end of the inner sheath is truncated to form a transverse face or surface ( ) that is approximately perpendicular to the longitudinal axis of the sheath. Electrical conductors ( and ) are positioned about the distal end ( ) and passage ( ) of the inner dilator sheath. When energized, the electrical conductor emits an electrical arc which electrically separates encapsulating biological tissue from the elongated electrical structure implanted therein and placed in the passage of the inner elongated dilator sheath.

Radio frequency dilator sheath

A receiver and decoder is disclosed wherein the receiver may be used as a remote control receiver in conjunction with a transmitter transmitting a carrier modulated with an encoded data train of first and second modulation frequencies for first and second modulation patterns. A third modulation pattern may be established by providing successive portions of the first modulation signal and then the second modulation signal during a given time. If the receiver is on the same carrier frequency and is set to receive the same modulation pattern sequence as in the encoded data train from the transmitter, then the receiver has an output which may be used to control some remote load. This may be a garage door operator to open a garage door, for example. The decoder in the receiver is responsive to the modulation signals and a signal discriminator discriminates among the three different modulation patterns or logic conditions of bits. A data comparator is connected to receive the logic conditions of the bits and a programmable switch provides a programmable bit input to the data comparator which compares sequentially bit by bit the information from the encoded data train with the information from the programmable switch to determine if they are the same or different. When a group of bits compares favorably then an output signal is given from the decoder to control the remote load. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Receiver and decoder

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Pittsburgh, PA, United States of America

James R Zewe