Patents by Inventor Wilfred J. Weir

Wilfred J. Weir 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).

  • Expansible chainwheel variable ratio mechanical drive
    Patent number: 4759739
    Abstract: A variable ratio transmission includes an input and an output, having an expansible chainwheel. A first drive path is provided to rotate the chainwheel and a second drive path is provided to increase the diameter of the chainwheel upon application of a first input torque and to decrease the diameter of the chainwheel upon application of a second input torque of opposite sense to the first input torque. The first and second drive paths are connected to the input so that the second drive path has a mechanical advantage over the first to provide an increase in diameter of the chainwheel prior to its rotation.
    Type: Grant
    Filed: October 24, 1984
    Date of Patent: July 26, 1988
    Inventor: Wilfred J. Weir