Betonmischtrommel und Deckel eines Mannlochs

Tambour mélangeur d'une bétonnière et couvercle d'un trou d'homme

Concrete mixer drum and manhole cover


There is disclosed a manhole cover for a rotatable concrete mixer drum, a rotable concrete mixer drum including such a manhole cover, and a concrete mixer including such a rotatable concrete mixer drum. In an embodiment of the invention, a concrete mixer (10) is disclosed having a rotatable concrete mixer drum (12) adapted for receiving concrete, the drum (12) including a drum body, a manhole (16) for access to an interior of the drum body, a manhole cover (18) and a locking mechanism (20) mounted externally of the drum body, the locking mechanism (20) operable to lock the manhole cover (18) with respect to the drum body to selectively releasably close the manhole (16).




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Patent Citations (3)

    Publication numberPublication dateAssigneeTitle
    DE-4333087-A1March 10, 1994Ingenieurkontor Fuer MaschinenTransport mixer for bulk material liquid mixt. - has cylindrical container with horizontal rotation axis and tubular discharge spiral.
    JP-H06144104-AMay 24, 1994Sogo Concrete Service:Kk, 株式会社総合コンクリートサービスコンクリートミキサー車におけるミキサドラム
    US-2002071336-A1June 13, 2002Smith Stephen W., Aamodt Robert A.Concrete mixer with interior coating and method

NO-Patent Citations (1)

    PATENT ABSTRACTS OF JAPAN vol. 018, no. 453 (M - 1662) 24 August 1994 (1994-08-24)

Cited By (0)

    Publication numberPublication dateAssigneeTitle