Patents by Inventor Kenneth E. Ryan

Kenneth E. Ryan 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).

  • Lift truck lowering system
    Patent number: 4762203
    Abstract: A hydraulic relief valve terminates release of fluid to lower a lift truck load carriage if the load carriage becomes supported by external structure during one stage of lowering, and an electrical switch terminates release of fluid, and may disable truck travel, if the load carriage becomes so supported during a different stage of lowering.
    Type: Grant
    Filed: June 25, 1987
    Date of Patent: August 9, 1988
    Assignee: The Raymond Corporation
    Inventor: Kenneth E. Ryan