Window-cleaning apparatus
    1.
    发明授权
    Window-cleaning apparatus 失效
    WINDOW-CLEANING装置

    公开(公告)号:US3629893A

    公开(公告)日:1971-12-28

    申请号:US3629893D

    申请日:1969-04-01

    Applicant: THOMAS BROWN

    Inventor: BROWN THOMAS

    CPC classification number: A47L1/05

    Abstract: A portable device is provided with a pad, sponge or the like adapted to contact a window for cleaning which is connected via a linkage to an electrically operated vibrator. As the device is moved over the surface of the window to be cleaned by an operator the vibrating motion causes the pad to clean the surface.

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