Patents by Inventor Herbert J. Johnson

Herbert J. Johnson 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).

  • Hydraulic trailer lift
    Patent number: 4148499
    Abstract: A hydraulic device for the lifting and lowering of a mobile home or trailer on a towing truck containing a hitching ball is provided. The hitching bar is permanently affixed to a vertical steel casing in which is contained and affixed a hydraulic cylinder. A piston is contained within said cylinder and is affixed to a piston rod which is permanently connected to a plate made integral with the towing vehicle. Hydraulic fluid is injected into the chamber of the cylinder above the piston for raising of the hitching ball and is injected in the bottom chamber of the cylinder for lowering of the hitching ball. The piston and rod do not move. The cylinder and casing and hitching ball move with injection of the hydraulic fluid.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: April 10, 1979
    Inventor: Herbert J. Johnson
  • Fuel vaporizer and control system
    Patent number: 3931801
    Abstract: Exhaust gases in an internal combustion engine are circulated into a chamber containing liquid fuel, the exhaust gases bubbling through the fuel to heat and vaporize the fuel prior to passing the fuel for mixing with air at the entrance to the intake manifold.
    Type: Grant
    Filed: February 21, 1974
    Date of Patent: January 13, 1976
    Inventors: William L. Rose, Herbert J. Johnson