Patents by Inventor Delano Schweiger

Delano Schweiger 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 cleaning heat exchangers
    Patent number: 5076856
    Abstract: Apparatus and method for cleaning heat exchangers when overhauling transmissions or the like wherein the inlet and outlet of a heat exchanger is disconnected from the transmission and connected to a source of solvent, oil and air. Solvent is first injected into the heat exchanger in a direction reverse to the normal flow of oil through the heat exchanger. This injection of solvent is stopped, then started again after a predetermined delay time. This injection and delay cycle may be repeated.Air is now injected under pressure into the heat exchanger in a direction reverse to the flow of oil therethrough, i.e. in the same direction as the solvent injection.Thirdly, oil is injected into the heat exchanger in the normal direction of flow of oil therethrough for a predetermined time. This injection of oil is stopped for a predetermined period of time. The injection and delay cycle for oil injection may also be repeated.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: December 31, 1991
    Inventor: Delano Schweiger
  • Apparatus and method for cleaning heat exchangers
    Patent number: 4991608
    Abstract: Apparatus and method for cleaning heat exchangers when overhauling transmissions or the like wherein the inlet and outlet of a heat exchanger is disconnected from the transmission and connected to a source of solvent, oil and air. Solvent is first injected into the heat exchanger in a direction reverse to the normal flow of oil through the heat exchanger. This injection of solvent is stopped, then started again after a predetermined delay time. This injection and delay cycle may be repeated.Air is now injected under pressure into the heat exchanger in a direction reverse to the flow of oil therethrough, i.e. in the same direction as the solvent injection.Thirdly, oil is injected into the heat exchanger in the normal direction of flow of oil therethrough for a predetermined time. This injection of oil is stopped for a predetermined period of time. The injection and delay cycle for oil injection may also be repeated.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: February 12, 1991
    Inventor: Delano Schweiger