Patents Assigned to CT Investments Ltd.
  • Patent number: 8170685
    Abstract: A radiant therapeutic heating apparatus may include a radiant heat generating layer having a plane surface including an infrared radiator adapted to radiate heat evenly from its surface, a pair of flexible electrically insulating and radiation-permeable layers located adjacent and covering opposite sides of the layer, a thermal insulation layer disposed against and covering one of the electrically insulating layers, and a sealed radiation permeable envelope enclosing the heating apparatus. The flexible heat generating layer may include a fiberglass material impregnated with a resistive material, which material may provide a surface temperature, when current is conducted therethrough, of no greater than about 54 degrees Celsius. Current limiting thermostats may be provided to prevent energy and temperature spikes. A stiffening element may help protect the components, and may orient portions of a user's body (such as, e.g., but not limited to, the wrist for repetitive strain injuries) in a therapeutic position.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: May 1, 2012
    Assignee: CT Investments Ltd.
    Inventors: Francis G. Docherty, Wendy Docherty, John Crerar
  • Patent number: 7783361
    Abstract: A therapeutic heating pad which is not hot to the touch provides substantial infrared radiation to a user. Accordingly it can be used for extended periods without feeling uncomfortable to the skin, while imparting deep therapeutic heat to the user. The heating pad is comprised of a radiant heat generating layer having a plane surface comprising means for radiating heat evenly from its surface, a pair of flexible electrically insulating and radiation permeable layers located adjacent and covering opposite sides of the layer, a thermal insulation layer disposed against and covering one of the electrically insulating layers, and a sealed radiation permeable envelope enclosing the entire heater. Preferably the flexible heat generating layer is comprised of a fiberglass material impregnated with a resistive material, which material provides a surface temperature, when current is conducted therethrough, which is no greater than about 54 degrees Celsius.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: August 24, 2010
    Assignee: CT Investments Ltd.
    Inventors: Francis G. Docherty, Wendy Docherty, John W. Crerar
  • Patent number: 7693580
    Abstract: A radiant therapeutic wrist heating pad, which is not hot to the touch, provides substantial infrared radiation to a user's wrist to alleviate symptoms of carpal tunnel syndrome. It can be used for extended periods without feeling uncomfortable to the skin, while imparting deep therapeutic heat to the user's wrist. The heating pad is comprised of a radiant heat generating layer having a plane surface comprising means for radiating heat evenly from its surface, a pair of flexible electrically insulating and radiation permeable layers located adjacent and covering opposite sides of the layer, a thermal insulation layer disposed against and covering one of the electrically insulating layers, and a sealed radiation permeable envelope enclosing the entire heater.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: April 6, 2010
    Assignee: CT Investments Ltd.
    Inventors: Francis G. Docherty, Wendy Docherty, John W Crerar