Patents by Inventor Charles C. Harrett, Jr.

Charles C. Harrett, Jr. 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).

  • Ratcheting wheelchair hub
    Patent number: 5301971
    Abstract: A wheelchair (10) for forwardly transporting a person in a sitting position includes a frame (12), a seat (14) and an axle (16). A pair of drive wheels (18) are rotatably supported on the axle (16) and rollably support the wheelchair (10) above a travel surface. A ratchet assembly (22) engages the drive wheels (18) directly with the axle (16) to permit free rotation of the drive wheels (18) forwardly but prevent rearward rotation thereof.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: April 12, 1994
    Inventors: H. Arthur Brereton, Charles C. Harrett, Jr.
  • Insulated folding door
    Patent number: 4961454
    Abstract: A folding door for industrial use utilizes a curtain having a series of spaced-apart panel sections which are insulated, and one or more folding hinge sections spanning adjacent panel sections. The hinge sections are generally made of flexible sheet material thinner than the insulated panel sections. Such a curtain is suspended from a doorway, and is opened and closed by folding and unfolding the curtain around the hinge sections. The folding door of the invention is particularly advantageous for use in large industrial refrigerators and freezers.
    Type: Grant
    Filed: June 11, 1986
    Date of Patent: October 9, 1990
    Inventors: Paul J. Reilly, Jr., Charles C. Harrett, Jr.