Patents by Inventor David S. Hoyle

David S. Hoyle 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).

  • Drive arm for a spreader
    Patent number: 5180112
    Abstract: A substantially elongate drive arm for a vehicular spreader is provided to transmit drive from a ground wheel of the spreader to a drive shaft of the spreader connected with a conveyor belt or the like. A drive wheel is mounted on the drive arm and the drive arm and drive wheel pivot relative to the drive shaft to enable the drive wheel to engage with the ground wheel, the arrangement being such that in use a torque reaction occurs whereby forces of engagement urging contact between the drive wheel and the ground wheel increase as the load in the drive shaft increases.
    Type: Grant
    Filed: November 6, 1990
    Date of Patent: January 19, 1993
    Inventor: David S. Hoyle