Patents by Inventor Mervin W. Howenstine

Mervin W. Howenstine 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).

  • Windmill apparatus
    Patent number: 6911745
    Abstract: A windmill apparatus utilizing a base having a partition forming a chamber. Vanes are also included and possess means for pivoting the same. Each vane has a portion that moves along an arcuate path within the chamber. The base rotates around a central pivot by wind that enters the chamber and impinges on the vanes.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: June 28, 2005
    Inventors: Mervin W. Howenstine, Allan E. Schrum
  • Methods and devices for energy conservation in refrigerated chambers
    Patent number: 5797276
    Abstract: Methods and devices for energy conservation to be retrofitted to refrigerated chambers or boxes of the type comprising an insulated chamber and an associated compression-type refrigeration system. The energy conservation devices disclosed are adapted to be mounted within the refrigerated chamber, on or within the evaporator, and connected to the thermostatic switch and the evaporator fans located within the refrigerated chamber.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: August 25, 1998
    Inventors: Mervin W. Howenstine, Allan E. Schrum
  • Methods and devices for energy conservation in refrigerated chambers
    Patent number: 5488835
    Abstract: Methods and devices for energy conservation to be retrofitted to refrigerated chambers or boxes of the type comprising an insulated chamber and an associated compression-type refrigeration system. The energy conservation devices disclosed are adapted to be mounted within the refrigerated chamber, on or within the evaporator, and connected to the thermostatic switch and the evaporator fans located within the refrigerated chamber.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: February 6, 1996
    Inventors: Mervin W. Howenstine, Allan E. Schrum