Patents by Inventor Don G. Maddock

Don G. Maddock 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).

  • Torque converter
    Patent number: 4180978
    Abstract: A torque converter having an impeller incorporating blades having a negative outlet tip angle in the range of 20.degree. to 30.degree. to reduce the torque absorption capacity of the impeller at engine idle. The stator blades are set at a check angle in the range of 51.degree. to 53.degree. and have a sharp nose displaced circumferentially from the entrance flow of the stator thereby inducing fluid turbulence at the stator inlet during converter stall.
    Type: Grant
    Filed: October 12, 1978
    Date of Patent: January 1, 1980
    Assignee: General Motors Corporation
    Inventor: Don G. Maddock