Door closer hold-open apparatus
    32.
    发明申请
    Door closer hold-open apparatus 失效
    闭门器闭门器

    公开(公告)号:US20040168284A1

    公开(公告)日:2004-09-02

    申请号:US10376189

    申请日:2003-02-27

    Inventor: Tom W. Duffy

    Abstract: The present invention relates to a hold-open apparatus for controlling the position of a door, preferably a screen door or storm door. The apparatus is used in conjunction with a piston assembly and can maintain a door in a predetermined open position, such as about 45null to about 100null in relation to a closed position. In a preferred embodiment, the apparatus can automatically lock and/or unlock when the door reaches predetermined positions. The apparatus advantageously can be retrofitted to existing door assemblies.

    Abstract translation: 本发明涉及一种用于控制门,优选屏门或风门的位置的保持开启装置。 该装置与活塞组件一起使用,并且可以将门保持在预定的打开位置,例如相对于关闭位置为大约45°至大约100°。 在优选实施例中,当门到达预定位置时,该装置可以自动地锁定和/或解锁。 该装置有利地可以被改装到现有的门组件。

    COUNTERBALANCE SYSTEM FOR AN OVERHEAD DOOR
    38.
    发明公开

    公开(公告)号:US20230272650A1

    公开(公告)日:2023-08-31

    申请号:US17681165

    申请日:2022-02-25

    Applicant: Zhide FENG

    Inventor: Zhide FENG

    Abstract: A counterbalance system for balancing an overhead door installed against a structure of a vehicle or a house, the door having at least one door panel, the system has a longitude pipe with non-circular section cut; a pair of U-brackets having two side walls with one center hole on each side; a pair of torsion spring assemblies received within the pipe, and the inboard end of the assembly being slidingly engaged within the pipe; a pair of connecting shaft, with inboard side connected with the outboard end of each of the spring assemblies; the shaft passing through the center holes of the U-bracket; the outboard end of each shaft being fixed with the side wall on the outboard end of each of the U-brackets; a pair of drums each having a center hole received by the shaft, and each of the drums located between two side walls of the U-bracket.

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