Patents by Inventor Hendrikus J. Schijf

Hendrikus J. Schijf 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: 5622012
    Abstract: A panel for so-called sectional doors, in which a number of panels are hinged together by means of hinge parts which form part of the panel. Each panel consists of an elongated body part, which is formed by two side plates lying a distance apart and along the long narrow sides contains the hinge parts for forming the hinged connection. One hinge part contains an arc-shaped nose, the arc-shaped outside wall of which connects virtually directly to one side wall of the body part, and the inside wall running concentrically herewith merges through an acute angle into the other side wall of the body part. The other hinge part has a supporting part lying near one side wall of the body part and bearing an essentially cylindrical thickened part, and a concentric wall running at a distance therefrom which with the thickened part leaves a space free for the accommodation of the nose of the other hinge part of an adjacent panel.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: April 22, 1997
    Inventor: Hendrikus J. Schijf
  • Patent number: 4644725
    Abstract: A double walled panel (1) comprising on its small longitudinal sides (2a, 2b) a profiling formed in cross-section by a curved nose (7) which faces a wide side surface (10) the base of which is located at a distance from the same wide side surface (10). A free-standing thickened portion (6) is disposed at the other small side (2a) and supported near the same wide side surface (10) fitting into an adjacent panel recess (5) enclosed by its curved nose (7).
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: February 24, 1987
    Assignee: Contractual Services (Jersey) Ltd.
    Inventor: Hendrikus J. Schijf
  • Patent number: 4644724
    Abstract: End strips for longitudinal edges of a sandwich panel to be used in facade cladding or in garage or entrance doors, the strips being provided with lugs which extend along the length of webs and each of which is arranged to engage with a lug of complementary shape on the other strip. Each lug is disposed on one side edge of the web with an adjoining flange which is disposed at least in part at an acute angle relative to the web, to co-operate with the adjoining cover plate of the sandwich panel.
    Type: Grant
    Filed: April 4, 1985
    Date of Patent: February 24, 1987
    Assignee: Contractual Services (Jersey) Ltd.
    Inventor: Hendrikus J. Schijf
  • Patent number: 4315345
    Abstract: A profiled hinge joint having joint wings designed in the form of profiled frame members, one joint wing being provided with a bead member extending longitudinally with the frame member, the other joint wing having a partially open, cap-shaped flange engaging the bead member and likewise extending longitudinally with the frame member.
    Type: Grant
    Filed: January 3, 1980
    Date of Patent: February 16, 1982
    Inventor: Hendrikus J. Schijf