Patents by Inventor Bo A. Andersson

Bo A. Andersson 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).

  • Check valve
    Patent number: 4971093
    Abstract: In a check valve wherein a possible malfunction resides in a thread pipe end being seat too far into the valve housing in a position to make a contact with the movable head or poppet of the valve and thus undesirably close the valve, vanes are provided in certain locations on the head or poppet that will themselves to contact the pipe end under pressure conditions and provide flumes for the fluid to flow through, in spite of the condition stated.
    Type: Grant
    Filed: February 13, 1990
    Date of Patent: November 20, 1990
    Inventor: Bo A. Andersson