Upwardly acting door structure
    1.
    发明授权
    Upwardly acting door structure 失效
    最后执行门结构

    公开(公告)号:US3457983A

    公开(公告)日:1969-07-29

    申请号:US3457983D

    申请日:1967-12-21

    Abstract: 1,217,928. Up-and-over door structure. OVERHEAD DOOR CORP. 9 Dec., 1968 [21 Dec., 1967], No. 58324/68. Headings E2F and E1J. An up-and-over door is made of horizontal panels, each mounted on a frame whereby they are hinged together. The frame of the lower of the two members has a rail 23A formed with a horizontal wall 24A. A flange 29A extending downwardly from the wall has an upper, preferably arced, portion 33A and a lower flat portion 34A which is attached to the rear flange 36A of the end of the panel. A support flange 37A extends inwardly from the lower edge of the arced portion and has a hollow semi-cylindrical portion 38A at its end. The frame of the upper of the two members has a rail 22 with a horizontal wall 42. A flange 52 extends downwards from this wall and has attached to it a flange 56 which extends backwards and preferably carries a cylindrical portion 57 on its end which is disposed within the hollow cylindrical part of the other member. Flange 56 has a ridge 59. A channel shaped bearing member 63 of selflubricating material is disposed between the two hinge members, fitting between the two cylindrical portions. The front edge 65 of this bearing member is preferably curved to engage, with the curved flange 33A.

Patent Agency Ranking