Patents by Inventor Alan W. Lafever

Alan W. Lafever 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).

  • Patent number: 4873774
    Abstract: A show sole is provided with one or more chambers therein. A piston-like cleat plate is fitted for vertical movement in each chamber. Cleats are fitted to the cleat plates, and openings are provided in the chamber bottom for permitting the cleats to pass therethrough when extended. The cleat plates are spring-biased to a retracted position. A source of fluid pressure such as a squeeze bulb type air pump is connected for supplying fluid pressure to the chambers to cause the cleat plates to move downwardly to extend the cleats from the sole bottom, to provide gripping traction. An inflatable member can be provided above the cleat plate in each chamber. A pair of soles may be connected via supply lines to a remote pump positionable at a convenient location on the wearer's person.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: October 17, 1989
    Assignee: Universal Plastics Incorporated
    Inventor: Alan W. Lafever