Patents by Inventor Edward H. D. Carson

Edward H. D. Carson 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: 4046418
    Abstract: A wheelchair is disclosed which is convertible into a wheeled stretcher, wherein the chair seat will assume a comfortable angle with respect to the horizontal when the chair is in the seating position and will assume a horizontal position coplanar with the back of the chair when the chair is in the stretcher position. The chair seat and back may be locked into any relative position between a fully erect seated position and a fully reclined stretcher position. Leg support members which are connected to the chair may assume any angular position with respect to the horizontal without regard for the relative positions of the seat and back of the chair. The leg support members may have their lengths independently adjusted.
    Type: Grant
    Filed: July 21, 1976
    Date of Patent: September 6, 1977
    Inventors: Royal Smith, Edward H. D. Carson
  • Patent number: RE30954
    Abstract: A wheelchair is disclosed which is convertible into a wheeled stretcher, wherein the chair seat will assume a comfortable angle with respect to the horizontal when the chair is in the seating position and will assume a horizontal position coplanar with the back of the chair when the chair is in the stretcher position. The chair seat and back may be locked into any relative position between a fully erect seated position and a fully reclined stretcher position. Leg support members which are connected to the chair may assume any angular position with respect to the horizontal without regard for the relative positions of the seat and back of the chair. The leg support members may have their lengths independently adjusted.
    Type: Grant
    Filed: September 5, 1979
    Date of Patent: June 1, 1982
    Inventors: Royal Smith, Edward H. D. Carson