Patents by Inventor Graham M. Leeder

Graham M. Leeder 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).

  • Dynamo electric machine brush assembly
    Patent number: 4354128
    Abstract: A brush assembly comprising an electrically insulating plate having therein an aperture with which communicate first and second slots. The slots each slidably receive a brush and a compression spring acts between the closed end of each of the slots and the respective brush to urge the brush slidably towards the aperture. The brushes and at least one wall of each of the slots are provided with mating surfaces whereby the brush may be latched in a retracted position relative to its respective slot against the action of its respective compression spring.
    Type: Grant
    Filed: July 25, 1980
    Date of Patent: October 12, 1982
    Assignee: Lucas Industries Limited
    Inventors: Anthony J. Chew, Graham M. Leeder, Thomas W. Pickford