Patents by Inventor Roger C. Dodge

Roger C. Dodge 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 and apparatus for leak test
    Patent number: 4575807
    Abstract: To measure the leak rate in a transmission partially filled with a transmission fluid but having an air space of unknown volume, air is supplied to the transmission to pressurize the cavity to a preset value. The flow rate of air to the transmission is measured and that rate is integrated in a computer to determine the mass air flow which is proportional to the volume of the air space in the transmission. The decline of pressure in the air space as a result of fluid leakage from the transmission is monitored by the computer and the leak rate is determined on the basis of that rate and the derived volume of the air space.
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: March 11, 1986
    Assignee: General Motors Corporation
    Inventor: Roger C. Dodge