Patents by Inventor Ronald J. Sweren

Ronald J. Sweren has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4770171
    Abstract: A cryogenic surgical tool (10) is provided to contact and freeze predetermined areas of tissue. The cryogenic surgical tool (10) consists of a low thermal conductivity handle (12) which is threadedly secured to an applicator member (20). The applicator member (20) includes an internal bore (26) within which is fitted an absorbent member (34) which absorbs a cryogenic liquid. The applicator member (20) includes an applicator first end surface (24) which contacts tissue and draws heat therefrom to extremely low temperatures, thus generally destroying the tissue contacted. The applicator member (20) includes a plurality of housing sidewall through openings (32) which are vent holes and allow for vaporization of the cryogenic liquid from the absorbent member (34) and prevents undue pressures from building up a cavity formed by bore (26) within housing member (20).
    Type: Grant
    Filed: February 12, 1987
    Date of Patent: September 13, 1988
    Inventors: Ronald J. Sweren, Alan Schwartz