The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 1977
Filed:
Feb. 06, 1976
Max Schneiderman, Clifton, NJ (US);
IPCO Hospital Supply Corporation, Whaledent International Division, New York, NY (US);
Abstract
An electrosurgical unit for use in tissue cutting or coagulation procedur A vacuum tube oscillator operating in push-pull relationship generates RF oscillations which are extracted across a balanced coil transformer, the secondary of which is ungrounded. Forceps are provided to be connected across the output of the transformer for producing an isolated voltage for use in sealing off bleeding blood vessels. A handpiece is also provided for connection across the transformer output for selectively producing a cutting voltage or a coagulation voltage. An intensity control circuit is capable of connection in the power supply to control the output voltage. A pulse modulation unit is capable of being connected at the input of the oscillator to control the 'on' time of the oscillator. A switching circuit operates to interconnect the intensity control to the power supply when the cutting probe is being utilized for cutting procedures, and connects the pulse modulation unit to the oscillator when the coagulation signal is being provided across either the forceps or the handpiece. An indifferent plate, also known as a dispersion electrode, is utilized together with the handpiece for cutting procedures. The indifferent plate is completely isolated from ground to prevent shocks and burns occurring on the patient at inadvertent ground points.