Patents by Inventor P. Ray Powell

P. Ray Powell 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).

  • Anti-jackknifing method and apparatus
    Patent number: 4223767
    Abstract: An anti-jackknifing method and apparatus for preventing uncontrolled skidding or jackknifing of a trailer towed by a tow vehicle. The method includes the step of continuously disabling one of the rear trailer brakes throughout a period when slippery road conditions are encountered so that the associated wheel is allowed to rotate freely. The apparatus for disabling the particular brake is actuable by the driver whenever slippery road conditions are anticipated, and are deactuated by the driver when such conditions no longer prevail.
    Type: Grant
    Filed: January 22, 1979
    Date of Patent: September 23, 1980
    Inventor: P. Ray Powell