Patents by Inventor Dwight Leaphart

Dwight Leaphart 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).

  • Patent number: 7422021
    Abstract: A method for cleaning an oil strainer in an oil pan of an internal combustion engine from which substantially all lubricant has been drained, the method comprising connecting a first conduit to said oil pan; introducing a cleaning fluid into said oil pan; connecting a second conduit to an opening on said engine; creating a circuit by a pressure pump wherein said cleaning fluid moves from said oil pan, through said opening, through said oil strainer and back into said oil pan; and evacuating the cleaning fluid from the engine.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: September 9, 2008
    Inventor: Dwight Leaphart
  • Publication number: 20070062562
    Abstract: A method for cleaning an oil strainer in an oil pan of an internal combustion engine from which substantially all lubricant has been drained, the method comprising connecting a first conduit to said oil pan; introducing a cleaning fluid into said oil pan; connecting a second conduit to an opening on said engine; creating a circuit by a pressure pump wherein said cleaning fluid moves from said oil pan, through said opening, through said oil strainer and back into said oil pan; and evacuating the cleaning fluid from the engine.
    Type: Application
    Filed: September 16, 2005
    Publication date: March 22, 2007
    Inventor: Dwight Leaphart
  • Patent number: 5816272
    Abstract: An apparatus for cleaning an oil strainer and pan in an internal combustion engine from which essentially all lubricant has been drained. The apparatus comprises a tank for holding the solvent, a conduit extending between the tank and the oil pan, a pump for moving solvent through the conduit toward the oil pan, an agitator for the solvent in the oil pan, and a collector for used solvent in the oil pan. Both pumping the solvent through the conduit and agitation of the solvent may be accomplished by a single air pump. The solvent may be heated.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: October 6, 1998
    Inventor: Dwight Leaphart
  • Patent number: 5665171
    Abstract: An apparatus and method for cleaning an oil strainer and pan in an internal combustion engine from which essentially all lubricant has been drained. A solvent is pumped into the oil pan. The solvent is agitated and cooled. The solvent is then drained.
    Type: Grant
    Filed: December 11, 1995
    Date of Patent: September 9, 1997
    Inventor: Dwight Leaphart