Patents by Inventor Risto T. Yli-Kovero

Risto T. Yli-Kovero 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).

  • Method of heating a sauna and a sauna stove
    Patent number: 5136734
    Abstract: A method of heating a sauna and a sauna stove. In order that the energy consumption would be low, the stones in a stone space (11) of the stove are first heated to a desired temperature by circulating air within the stove by means of a fan (15) as a closed force circulation merely through the stone space (11). After the desired temperature has been achieved, the air is begun to be circulated by means of the fan (5) as an open forced circulation through the stone space (11) and the sauna room.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: August 11, 1992
    Inventor: Risto T. Yli-Kovero