Patents by Inventor Leif B. Johannesson

Leif B. Johannesson 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).

  • Metering apparatus
    Patent number: 4610163
    Abstract: An apparatus which functions as a combined outlet valve and a meter for a fluid. The apparatus comprises a space (2) in which a piston means (3) is reciprocatable and which is in connection with an inlet conduit and an outlet conduit on each side of the piston (3), each of said conduits being provided with a shut-off valve (5a, b; 6a, b). According to the invention the adjustment of the shut-off valves (5a, b, 6a, b) is effected by means (4, 8-14) acting by vacuum and/or atmospheric air.
    Type: Grant
    Filed: July 5, 1984
    Date of Patent: September 9, 1986
    Assignee: Alfa-Laval Agri International AB
    Inventor: Leif B. Johannesson
  • Milk flow meter
    Patent number: D357877
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: May 2, 1995
    Assignee: Alfa Laval Agri AB
    Inventors: Leif B. Johannesson, Per A. Fagerstrom