Patents by Inventor David H. Crawford

David H. Crawford 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: 6364412
    Abstract: Disclosed is a hanging chair that is capable of accommodating more than one individual. Also provided is a hanging chair that includes a suspension structure that distributes the increased load that is associated with having more than one person in the chair over a length of the overhead support. By distributing the load, the possibility of the overhead support or the suspension structure failing is, inmost situations, reduced. The present invention further provides a hanging chair that is capable of rotating about a vertical axis without causing binding or twisting of the suspension structure.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: April 2, 2002
    Inventor: David H. Crawford
  • Patent number: 5851053
    Abstract: The present device is directed to a hanging chair that includes a chair and a suspension structure for connecting the chair to an overhead support. The suspension structure includes a longitudinally extending support member that is operatively attached to the chair and located substantially parallel to the longitudinal axis of the chair. Also included in the suspension structure is a device that permits the user to adjust the angle of chair relative to the ground.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: December 22, 1998
    Inventor: David H. Crawford
  • Patent number: 5079776
    Abstract: The present invention provides a glove for use in rock climbing. The glove includes a pad that, in the preferred embodiment, is made from a climbing rubber and adapted to cover the back and lower peripheral palm portioins of the climber's hand.
    Type: Grant
    Filed: December 7, 1989
    Date of Patent: January 14, 1992
    Inventor: David H. Crawford