Patents by Inventor Raine Riutta

Raine Riutta 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).

  • Filtration apparatus with bag-like plenum chamber
    Patent number: 5312465
    Abstract: An air filtering apparatus includes a fan body having an air intake and an air outlet. There is a fan within the body which draws air into the intake and forces it out of the outlet. There is at least one air filter between the intake and the outlet. A plenum chamber is connected to the fan body about the air outlet. The plenum chamber is a flexible bag of a sheet-like material which is inflated by air forced out of the outlet of the fan body. At least a portion of the plenum chamber is an air diffuser for air exiting the apparatus. The diffuser is more permeable than the filter.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: May 17, 1994
    Inventor: Raine Riutta