Patents by Inventor Raymond L. Mitchell

Raymond L. Mitchell 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).

  • Publication number: 20120133161
    Abstract: A hand shovel having a handgrip shaft and shovel blade wherein the handgrip can rotate relative to the longitudinal axis of the shaft. The shaft may be non-round in order to provide the user with a better grip on the shaft while rotating the shaft and blade relative to the handgrip.
    Type: Application
    Filed: November 23, 2011
    Publication date: May 31, 2012
    Inventor: Raymond L. Mitchell
  • Patent number: 6634663
    Abstract: A manual propulsion kit for a wheelchair when the wheelchair includes a frame with two large wheels on either side of the frame journaled to axles on the frame, each of the large wheels mounting a circular handrail. The kit including a pair of manual propulsion assemblies wherein each assembly includes a lever adapted to be journaled to one of the axles for rotational movement within a predetermined angular sector determined by a substantially vertical neutral position and a position forward of the frame. A crank handle having a crank web member is pivoted for rotation, at the end of the lever arm adjacent the handrail when the lever arm is mounted to the axle, such that the crank web member moves between a neutral position disengaged from the handrail and a forward position engaged with the handrail. A crank handle grip is mounted to the crank web member.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: October 21, 2003
    Inventor: Raymond L. Mitchell