Patents by Inventor Tom Orvar Bjorn Karlsson

Tom Orvar Bjorn Karlsson 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 for liquid level control
    Patent number: 4030521
    Abstract: A method for use in surface treatment systems for maintaining a desired fluid level in the process and rinse tanks. The invention uses a dryrunning-safe pump, inserted in the tank. An overflow for the tank serves as an intake leading to the suction side of this pump. The pressure side of the pump is connected to an outlet outside the tank.
    Type: Grant
    Filed: May 14, 1975
    Date of Patent: June 21, 1977
    Assignee: Nordnero AB
    Inventor: Tom Orvar Bjorn Karlsson