Patents by Inventor Derek R. Hutchins

Derek R. Hutchins 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).

  • Hinge bolt set
    Patent number: 4640052
    Abstract: A hinge bolt set is disclosed for improving security of hinged doors and the like, comprising a circular metal rod (1) adapted to be located in an edge face of a door (D) adajcent to but spaced from a hinge (H) and a synthetic resinous keep (7) adapted to be located in a opposing face of a door jamb (J), the keep having a tapered cavity (9) therein to receive a projecting end of the rod (1), which cavity terminates in an arcuate surface 13 to receive the bolt (1). The rod may be held in place by a knurled portion (3) and the keep with screws (17).
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: February 3, 1987
    Assignee: Nouveaux Security Products Limited
    Inventors: Alan R. Zebedee, Derek R. Hutchins