Apparatus for conducting air into bags of vacuum cleaners

Details Apparatus for conducting air into bags of vacuum cleaners Apparatus for conducting air into bags of vacuum cleaners

A - Human Necessities

47

L

A47L 9/00 (2006.01) A47L 5/28 (2006.01)

Patent

CA 2423648

Contoured exhaust ducts (112) for transmitting a particulate-laden airstream from a conduit (110) into a bag (30) of an upright vacuum cleaner (102) are disclosed. In one embodiment, the airstream is turned by a transitional section (196) of the exhaust by about 90 degrees. The interior of the exhaust duct (112) is smoothly contoured through such transition for avoiding the generation of excessive noise and turbulence. The contoured surface (198) of the transitional section (196) prevents heavy objects entrained in the airstream from rebounding back in a direction against the airflow. The cross- sectional area of the exhaust duct (112) may be maintained constant despite a change in cross-sectional shape from the inlet to the outlet thereof.

L'invention concerne des tuyaux d'évacuation (112) profilés permettant de transférer un courant d'air chargé en particules depuis un conduit (110) jusque dans un sac (30) d'un aspirateur (102) vertical. Dans un mode de réalisation, le courant d'air est renversé par une section intermédiaire (196) de l'évacuation d'environ 90 degrés. L'intérieur du tuyau d'évacuation (112) est profilé de manière régulière tout le long de la section intermédiaire afin d'éviter le bruit et la turbulence. La surface profilée (198) de la section intermédiaire (196) permet d'empêcher que des objets lourds entraînés par le courant d'air ne remontent à contre-courant du courant d'air. La section transversale du tuyau d'évacuation (112) doit rester constante même lorsque la forme de la section transversale se modifie depuis l'entrée vers la sortie.

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