Patents by Inventor Erick M. Spiess

Erick M. Spiess 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: 4460190
    Abstract: A three wheeled wheelchair wherein two of the wheels are leading wheels with the single wheel being a trailing wheel. The wheelchair is propelled through the use of a chain drive assembly which is to be manually operated through the use of a handle assembly. Adjacent the handle assembly is a seat which is to support the occupant of the wheelchair. The seat is cushionly supported by a shock absorber assembly. The handle assembly is attached to a steering mechanism which, through lateral movement of the handle assembly, causes the leading wheels to be turned in respect to the frame of the wheelchair. A separate turning wheel assembly is to be manually movable to an extended position to cause the trailing wheel to be spaced from the supportive surface thereby permitting three hundred and sixty degree turning of the wheelchair about a single point.
    Type: Grant
    Filed: July 2, 1982
    Date of Patent: July 17, 1984
    Inventor: Erick M. Spiess