Patents by Inventor Nigel G. Stevens

Nigel G. Stevens 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).

  • Electroviscous fluid-actuated devices
    Patent number: 4782927
    Abstract: An electroviscous fluid actuated device, such as a clutch, comprises relatively rotatable electrode plates (10,11) defining a gap (12) therebetween of 2 mm to 5 mm width. An electroviscous fluid in the gap (12) becomes "solid" when a pulsating d.c. is applied to the plates. Slippage can be controlled by controlling the peak value of the pulsating d.c.The electroviscous fluid comprises a suspension of starch in silicone oil, having a ratio by weight of at least 1:1.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: November 8, 1988
    Assignee: National Research Development Corporation
    Inventors: John L. Sproston, Nigel G. Stevens, Ian M. Page