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    Plastic fan wheel for fume extraction-or - oil burner-fan
    11.
    发明专利
    Plastic fan wheel for fume extraction-or - oil burner-fan 未知

    公开(公告)号：DE1957988A1

    公开(公告)日：1971-06-03

    申请号：DE1957988

    申请日：1969-11-18

    Applicant: GRONBACH WILHELM

    Inventor： GRONBACH WILHELM

    IPC: F04D29/02 ,  F04D29/28

    Abstract: The wheel is extruded in two parts from a plastic, preferably acetal copolymer or polyamide. Each part has a circular disc as a central flange and blades connected both with the circumferential surfaces and a plane surface of the associated circular disc. One wheel part has the wheel hub, and both parts are centred and joined together by a hole and pin connection. One disc of the central flange has three slits while the other disc has self-locking bayonet closure-like hooks.

    12.
    发明专利
    未知

    公开(公告)号：DE1989271U

    公开(公告)日：1968-07-11

    申请号：DEG0039171

    申请日：1968-03-15

    Applicant: GRONBACH WILHELM

    Inventor： GRONBACH WILHELM

    Hinge with spring for compensating the weight of wings
    15.
    发明专利
    Hinge with spring for compensating the weight of wings 未知

    公开(公告)号：DE3442267A1

    公开(公告)日：1986-06-05

    申请号：DE3442267

    申请日：1984-11-19

    Applicant: GRONBACH WILHELM

    Inventor： GRONBACH WILHELM

    IPC: E05F1/12

    Abstract: The invention relates to a hinge with spring for weight compensation, in which the spring is supported at one end in the stationary hinge part and engages at its other end on the second hinge part attached to the wing. For the purpose of simplifying known hinges of this type, the spring is designed as a bar spring and is supported in a rotatable bolt arranged in the hinge part fastened to the wing.

    A hinge with weight compensation means
    16.
    发明专利
    A hinge with weight compensation means 未知

    公开(公告)号：GB2167804A

    公开(公告)日：1986-06-04

    申请号：GB8528216

    申请日：1985-11-15

    Applicant: GRONBACH WILHELM

    Inventor： GRONBACH WILHELM

    IPC: E05F1/12

    Abstract: A hinge is provided for a leaf member pivotable about a substantially horizontal axis such as a lid, flap or door or a chest-type freezer, which hinge has a spring (3) for compensation for the weight of the leaf member, when fitted thereto, particularly over the upper part of the opening movement of the leaf member, which spring (3) is supported at or adjacent one end thereof in a stationary portion (2) of the hinge and engaged at or adjacent its other end in, on or with a second hinge portion (1, 12) which is fixedly attachable to the movable leaf member, wherein the spring (3) is in the form of a bar spring and is supported in or on a pin (4) rotatably mounted in the second hinge portion (1), or in or on two opposing spaced apart projecting portions (14, 14') in or on the second hinge portion (12).

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