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US 5,641,423 AGranted
Radio frequency heating apparatus for rendering medical materials
AssigneeStericycle, Inc.
InventorsJack E. Bridges, Guggilam C. Sresty, Jeffery S. Held, James W. Sharp, Thomas J. Bajzek
Life of this patent
Estimating the term…
Abstract
Infectious medical materials is rendered innocuous by heating heterogeneous medical materials having wet and dry portions with a radio frequency electric field. The medical materials are exposed to the radio frequency electric field in order to heat the medical waste. The medical waste may include sorted medical or veterinary waste which after heat treatment may be shredded and recycled.
Claims3
An apparatus for rendering infectious medical waste innocuous comprising:
- a radio frequency treatment unit for accepting an infectious medical waste to be treated;
- a container with a cover closing said container, wherein said infectious medical waste is present within said closed container;
- means for transporting said closed container with said infectious medical waste through the radio frequency treatment unit;
- and
- means for energizing the radio frequency treatment unit with a time-varying electric field having a frequency below the frequency of microwaves, and
- means for injecting inert gas into the radio frequency treatment unit to sweep oxygen therefrom to avoid oxidized heated medical waste and to cause a flow of gas from a relatively cool portion of the radio frequency treatment unit to a relatively warm portion to prevent any vapor which might have escaped from the medical waste from condensing on cooler medical waste entering the radio frequency treatment unit.
3 more elements
Dependencies are inferred from the claim text.