Patents by Inventor Olof Engwall

Olof Engwall 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 and means for air purification during spray-painting
    Patent number: 3981694
    Abstract: A spray-painting chamber comprises a vertical wall containing an upper opening and a lower opening. Means are provided to supply water to the top of said wall so as to produce a film of water running down the wall. Means are provided for sucking the paint mist from the spray-painting chamber through said openings. When passing through said openings the paint mist mixes with the water, resulting in the paint drops being absorbed by the water. Of the total water quantity 30-60% is drawn in by the paint mist through the upper opening. A tank is provided below said wall to receive the water-paint mixture. The paint separates from the water in said tank. The water is re-used by being pumped to the top of said wall.
    Type: Grant
    Filed: September 4, 1974
    Date of Patent: September 21, 1976
    Assignee: Thermospray AG
    Inventors: Lars Evert Hultgren, Olof Engwall
  • Combined masking tape dispenser and lock
    Patent number: D298839
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: December 6, 1988
    Assignee: Sprayway Maskin AB
    Inventors: Hans Soderberg, Olof Engwall