Patents Assigned to Spembly Medical Limited
  • Patent number: 5992158
    Abstract: A cryosurgical instrument comprises a cooling tip operable to be cooled by a flow of a cryogenic fluid within the tip; and a fluid transfer chamber having a fluid inlet for receiving cryogenic fluid, a first fluid outlet communicating with the cooling tip for supplying cryogenic fluid to the cooling tip, and a second fluid outlet communicating with an atmospheric air vent.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: November 30, 1999
    Assignee: Spembly Medical Limited
    Inventors: Robert William Goddard, Leslie John Penny
  • Patent number: 5860970
    Abstract: A cryosurgical instrument comprises a metal cooling tip operable to be cooled by a flow of cryogenic fluid within the tip, at least a boiling region of the tip being coated with a heat-insulating coating. The presence of the heat-insulating coating can promote nucleate boiling of the fluid rather than film boiling. Nucleate boiling within the tip provides a greater cooling efficiency of the tip than film boiling.
    Type: Grant
    Filed: July 7, 1997
    Date of Patent: January 19, 1999
    Assignee: Spembly Medical Limited
    Inventors: Robert William Goddard, Leslie John Penny
  • Patent number: 5759182
    Abstract: A cryosurgical probe comprises a probe head operable to be cooled by the expansion of a refrigerant gas within the probe head; a probe handle having means for precooling the refrigerant gas; and a flexible catheter linking the probe handle and the probe head, the catheter defining a channel for carrying precooled refrigerant gas from the probe handle to the probe head.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: June 2, 1998
    Assignee: Spembly Medical Limited
    Inventors: Kelvin John Varney, Simon Richard Reeves
  • Patent number: 5403309
    Abstract: A cryosurgical probe, insertable into a bodily cavity for performing cryosurgical ablation on the interior of the cavity, comprises a channel for introducing a heat-conducting liquid into the cavity, and a cooling element for cooling the heat-conducting liquid.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: April 4, 1995
    Assignee: Spembly Medical Limited
    Inventors: Richard B. Coleman, Rudiger U. J. Pittrof, Simon R. Reeves
  • Patent number: 5078713
    Abstract: A cryosurgical probe having a probe head which is cooled by Joule-Thomson cooling, and is then used to freeze bodily tissue during a surgical procedure. A steerable catheter is connected between the probe head and a probe handle to enable the probe head to be guided with safety and precision along arteries of the body to the target area.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: January 7, 1992
    Assignee: Spembly Medical Limited
    Inventor: Kelvin J. Varney