Patents by Inventor William R. Crothers

William R. Crothers 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: 4350356
    Abstract: In a cart comprising a scoop-shaped fabric body and a tubular frame, the front edge of the bottom of the body is clamped between laterally extending means secured to the forward end of the frame and a substantially rigid clamping member. The clamping member protects the front edge of the body material from damage.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: September 21, 1982
    Inventor: William R. Crothers
  • Patent number: 4343487
    Abstract: In a folding cart comprising a fabric body and a collapsible tubular frame, wheels are located behind and underneath the body, and are prevented from coming into contact with the body by protective fenders which also serve as collapsible braces for locking the frame elements in the open condition.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: August 10, 1982
    Inventor: William R. Crothers
  • Patent number: 4336951
    Abstract: In a cart comprising a fabric body and a tubular frame, wheels are located behind the body, and are prevented from coming into contact with the body by protective fenders which also serve as braces for holding the frame elements in rigid relationship to each other.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: June 29, 1982
    Inventor: William R. Crothers
  • Patent number: 4222585
    Abstract: A folding cart comprising a fabric body and a collapsible tubular frame comprises tubular members extending longitudinally underneath the bottom of the fabric body for supporting the load and preventing the formation of pockets which impede unloading. Wheels are located behind and underneath the body, and are prevented from coming into contact with the body by protective fenders which also serve as collapsible braces for locking the frame elements in the open condition. The front edge of the bottom of the body is protected by a clamping member. The tubular members underneath the body are arranged substantially in an inclined plane in order to insure that the front edge of the body is able to come into contact with the ground despite irregularities therein.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: September 16, 1980
    Inventor: William R. Crothers