A vacuum cleaning head

A - Human Necessities – 47 – L

Patent

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Details

A47L 9/04 (2006.01)

Patent

CA 2581181

A vacuum cleaning head (1) comprises a housing (2) having an agitator in the form of a brush bar (4) rotatably arranged in a chamber (3) having an air inlet (6) and an air outlet (22). An air turbine (7) for driving the brush bar 4 is provided. The air turbine (7) has its own air inlet (9) for admitting clean air to drive the turbine. A restricting member (25) is arranged in the outlet of the chamber so as to restrict the cross-section of the outlet when the head is pressed against a surface to be cleaned. The restricting member (25) serves to restrict the flow of air from the brush bar chamber (3). The restricting member (25) is designed to distribute incoming air between the main inlet (6) and the turbine inlet (9) in a satisfactory ratio. Thus, more air flows through the turbine (7), enabling it to drive the brush bar (4) at high rotational speed.

Tête d'aspirateur (1) comprenant un carter (2) qui comporte un agitateur sous forme d'une barre-brosse (4) disposée de façon à pouvoir tourner dans une chambre (3) ayant une entrée d'air (6) et une sortie d'air (22). On y trouve une turbine à air (7) pour entraîner la barre-brosse (4). La turbine à air (7) a sa propre entrée d'air (9) pour laisser entrer de l'air propre afin d'entraîner la turbine. Un élément limiteur (25) est disposé dans la sortie de la chambre afin de réduire la section transversale de la sortie quand on appuie la tête contre la surface à nettoyer. L'élément limiteur (25) sert à limiter le flux d'air en provenance de la chambre (3) de la barre-brosse. L'élément limiteur (25) est conçu pour répartir l'air entrant entre l'entrée principale (6) et l'entrée de la turbine (9) dans une proportion satisfaisante. Ainsi, on a un débit d'air plus important à travers la turbine (7), ce qui lui permet d'entraîner la barre-brosse (4) à une vitesse de rotation élevée.

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