| 摘要 |
<p>A closure cover consisting of an inner cover member having a substantially cup-shape capable of engaging with the aperture to be closed, the cover member including a sealing flange adapted to co-operate with the edge of the opening, an overlapping outer cap member rotatably mounted on the circumference of the edge, which cap member has a centrally located, firmly seated hollow support member for a cylinder lock, the lock being rotatably mounted therein, the cap member being axially supported by a radially displaceable bolt, movement of said bolt being effected by an eccentric, whereby the cover is coupled to the inner cover component, and provided with a sleeve-shaped surrounding component with base closure at the bottom for sealing against the exterior, for a freely rotatably outer cap secured by a key when the inner cover component is firmly tightened on the socket opening wherein an inner cover member has a first cup-shaped member having a radially directed edge flange including a revertive free end portion and has further a cup-shaped member including a base portion mounted therein, said further cup-shaped member having a radially outwardly directed edge flange locatable between the two portions of the flange of the first cup member, whereby the two cup members are firmly interconnected, are rotatable within the outer cap and are sealed to the exterior, and a cylinder lock centrally rotatably mounted within the outer cap which is key-actuated, the cylinder lock including radially displaceable coupling bolt which engages between ribs distributed at equally spaced intervals around the wall surface of the further cup-shaped component, which ribs project in a direction perpendicular to the axis of the component adapted to the size and shape of the bolt.</p> |
