Patents by Inventor Lyell J. Woolford

Lyell J. Woolford 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).

  • Prickle chain device and method of production thereof
    Patent number: 4893463
    Abstract: A prickle chain wherein each link has two side portions which are joined at one end by a curved bridge portion, the side portions terminating in respective outwardly projecting ends which cross each other and extend in opposite directions, the projections being the "prickles" of the chain. Each link is formed by engaging opposite ends of a straight rod in respective brackets which are pivoted by hydraulic piston/cylinder assemblies firstly to form the rod to a "U" shape, and then cause the ends to cross each other and project outwardly in opposite directions.
    Type: Grant
    Filed: September 22, 1988
    Date of Patent: January 16, 1990
    Inventor: Lyell J. Woolford