Patents by Inventor Henry R. Gilchrist

Henry R. Gilchrist 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).

  • Magnetic door hardware
    Patent number: 4434524
    Abstract: Magnetic door hardware for closing swinging doors. Two magnets are axially aligned with the door post, and the magnetic fields of the magnets are aligned so as to produce a radial torque when the door is swung open. One magnet is attached to the door post, and the other magnet is attached to the door frame so that the radial torque produced by the magnets causes the door to rotate to the closed position.
    Type: Grant
    Filed: April 20, 1982
    Date of Patent: March 6, 1984
    Assignee: Eckel Industries, Inc.
    Inventor: Henry R. Gilchrist
  • Yieldable door body
    Patent number: 3979872
    Abstract: A door body formed largely of yieldable material has two panels spaced apart with a hollow separator between them that is rectangular in cross section and has two pairs of oppositely disposed sides and two dividers therein at right angles to each other that thereby provide four enclosed openings. This construction holds the paneled portion of the door body firm, especially at the outer edges, yet is flexible enough to permit some distortion when the door is forcibly opened as by striking it vigorously with a moving truck.
    Type: Grant
    Filed: March 2, 1972
    Date of Patent: September 14, 1976
    Assignee: Eckel Industries, Inc.
    Inventors: Henry R. Gilchrist, Hollis M. Berry