Vacuum cleaner attachment for the wet cleaning of surfaces

Details Vacuum cleaner attachment for the wet cleaning of surfaces Vacuum cleaner attachment for the wet cleaning of surfaces

1997-10-20

2000-02-08

Graham, Gary K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15401, 15367, 401273, A47L 528, A47L 700

Patent

active

060215453

DESCRIPTION:

BRIEF SUMMARY
FIELD AND BACKGROUND OF THE INVENTION

The invention relates to a vacuum cleaner attachment for the wet cleaning of surfaces, in particular of vertical surfaces, having a liquid applicator, a suction channel having a mouth and a cleaning element.
In addition to the usual air vacuum cleaners, appliances are also known which can apply liquid, in particular cleaning liquid, and suck it back up in one operation. However, these are suitable only for the cleaning of hard floors. Such wet cleaning, which is performed in one operation, is not known for the cleaning of hard surfaces such as window panes, for example. In order to clean surfaces of this type, appliances are offered which have separate fresh water and dirty water tanks. Cleaning, including drying, takes place in this case in several steps. Firstly, by means of a pump and a spray nozzle, a cleaning solution is sprayed onto the hard surface, such as a window pane, in a first operation. This cleaning solution is distributed using a special sponge in a second step. This is followed, in a further final operation, by sucking up the dirty mixture using a suction nozzle, which is connected by means of a suction hose to a blower. What is disadvantageous in this arrangement is that continuous operation is not made possible. This is associated with disadvantages, in particular with regard to the improvement of walls.


SUMMARY OF THE INVENTION

An object of the present invention is to configure a vacuum cleaner attachment of the type in question for the wet cleaning of surfaces in an improved manner in such a way that, even if the appliance is used on vertical surfaces or, furthermore, even on surfaces whose surface normal vectors have a non-vanishing component in the direction opposite to the gravitation vector, such as sloping skylights or ceilings, the cleaning of the surface and the sucking up the cleaning liquid is performed in one operation.
On the basis of the arrangement in accordance with the invention, a vacuum cleaner attachment is provided which enables continuous working on surfaces, in particular vertical surfaces. This is achieved in that for the purposes of continuous working the liquid applicator is arranged for the continuous supply of liquid and the mouth of the suction channel is located downstream of the liquid applicator, relative to an application direction, the cleaning element being disposed in the region of the liquid applicator or between the liquid applicator and the suction channel. By this means, even vertical surfaces, in particular hard surfaces, such as window surfaces, can be cleaned in one operation in an advantageous manner. As a result of the fact that the liquid applicator is arranged for the continuous supply of liquid, the appliance according to the invention can be employed irrespective of any inclination of the surface to be cleaned and thus even in the case of vertical surfaces. Furthermore, working overhead is also made possible hereby. While working on the surface, liquid is continuously transferred to the surface by means of the liquid applicator, a cleaning of the surface being first effected by means of the cleaning element and a sucking up of the dirty mixture in the region of the suction channel being effected directly subsequently in the course of one movement of the appliance in one processing direction.
In this case, a configuration is preferred in which the liquid applicator is supplied with the liquid by means of capillary action. As a result of this configuration, active components for the application of the cleaning liquid can be dispensed with. Active components are known in the form of pumps and spray nozzles, these constructions having the disadvantage that, as the result of spraying the cleaning solution on, only a non-uniform moistening of the surface to be cleaned is effected. Furthermore, in this case, other regions, including, for example, the window frames in the case of cleaning windows, are concomitantly and inadvertently also sprayed. Furthermore, in the case of the known prior art, it has tran

REFERENCES:
patent: 1028011 (1912-05-01), Ferenczy
patent: 2101415 (1937-12-01), Stuart
patent: 2885713 (1959-05-01), Morrill
patent: 3195166 (1965-07-01), Wisner
patent: 3195167 (1965-07-01), Wayne
patent: 3203025 (1965-08-01), Schreur
patent: 4335486 (1982-06-01), Kochte
patent: 5060342 (1991-10-01), Brazier

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