Patents by Inventor Craig James Dittmar

Craig James Dittmar 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).

  • Apparatus and improved method for changing automatic transmission fluid in motor vehicles
    Patent number: 6253805
    Abstract: An apparatus for replacing transmission fluid in an automatic transmission. The apparatus comprises a tank separated into a pair of compartments by a bladder or diaphragm. At least one pressure regulator communicates with the tank. A vent valve assembly also communicates with the tank. A process for cleaning an automatic transmission and for replacing after cleaning used automatic transmission fluid in the automatic transmission with fresh automatic transmission fluid. The process includes flowing fresh ATF into a first compartment of a tank and into a pliable tub or bladder member in communication with the first compartment until the pliable tub or bladder member and the first compartment are filled with a volume of fresh ATF. A chemical cleaning compound is disposed in the used ATF of the automatic transmission and is circulated through the automatic transmission and its associated components to clean the same and produce contaminated used ATF.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: July 3, 2001
    Assignee: BG Products, Inc.
    Inventors: Harold Edward Erwin, Michael Jason Erwin, Craig James Dittmar
  • Apparatus and improved method for changing automatic transmission fluid in motor vehicles
    Patent number: 6179018
    Abstract: An apparatus for replacing transmission fluid in an automatic transmission. The apparatus comprises a tank separated into a pair of compartments by a bladder or diaphragm. At least one pressure regulator communicates with the tank. A vent valve assembly also communicates with the tank. A process for cleaning an automatic transmission and for replacing after cleaning used automatic transmission fluid in the automatic transmission with fresh automatic transmission fluid. The process includes flowing fresh ATF into a first compartment of a tank and into a pliable tub or bladder member in communication with the first compartment until the pliable tub or bladder member and the first compartment are filled with a volume of fresh ATF. A chemical cleaning compound is disposed in the used ATF of the automatic transmission and is circulated through the automatic transmission and its associated components to clean the same and produce contaminated used ATF.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: January 30, 2001
    Assignee: BG Products, Inc.
    Inventors: Harold Edward Erwin, Michael Jason Erwin, Craig James Dittmar