Patents by Inventor Mitchell W. Warth

Mitchell W. Warth 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).

  • Auxiliary propane fuel tank system for vehicles
    Patent number: 6279612
    Abstract: An auxiliary fuel tank system includes a permanent pressure tank for natural gas or propane is mounted on a vehicle such as a fork lift truck. The auxiliary tank is connected through fuel lines to a replaceable portable tank which supplies fuel to the auxiliary tank through check valves and a valve mechanism which may be turned on and off. The auxiliary tank is filled upon initial attachment of the portable tank to the fuel line for the truck. After filling the auxiliary tank, the valve mechanism is closed only to be reopened upon exhaustion of fuel from the portable tank. Fuel lines connect the respective tanks to the engine thereby permitting operation of the engine, even upon exhaustion of fuel from the portable, replaceable tank.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: August 28, 2001
    Assignee: Spare Tank Co., Inc.
    Inventor: Mitchell W. Warth
  • Auxiliary propane fuel tank system for vehicles
    Patent number: 5975574
    Abstract: An auxiliary fuel tank system includes a permanent pressure tank for natural gas or propane is mounted on a vehicle such as a fork lift truck. The auxiliary tank is connected through fuel lines to a replaceable portable tank which supplies fuel to the auxiliary tank through check valves and a valve mechanism which may be turned on and off. The auxiliary tank is filled upon initial attachment of the portable tank to the fuel line for the truck. After filling the auxiliary tank, the valve mechanism is closed only to be reopened upon exhaustion of fuel from the portable tank. Fuel lines connect the respective tanks to the engine thereby permitting operation of the engine, even upon exhaustion of fuel from the portable, replaceable tank.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: November 2, 1999
    Assignee: Spare Tank Co., Inc.
    Inventor: Mitchell W. Warth