Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
1999-06-24
2001-02-13
Warden, Sr., Robert J. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S028000, C015S097100, C015S328000, C015S344000, C015S387000
Reexamination Certificate
active
06185781
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention pertains to a hand held, wet pickup, powered scrubbing tool having at least two interchangeable scrubbing elements. More particularly, this invention pertains to a compact hand held extractor nozzle having at least two interchangeable powered scrubbing modules, namely, at least a brush module including a pair of vertical axis scrub brushes and a scrub pad module including a single vertical axis scrub pad.
2. Description of the Prior Art
It is known in the prior art to provide hand held extractor nozzles and scrubbers with powered agitators, such as a scrub pad or a brush. Powered hand tools having a single axis scrubbing element, such as a scrub pad or a scrub brush, for cleaning hard surfaces are common in the prior art, as illustrated by U.S. Pat. Nos. 2,967,314 and 5,687,442. U.S. Pat. No. 5,587,442 discloses a water powered, hard surface scrubber having a single vertical axis scrub brush that may be interchanged with a single vertical axis scrub pad.
Scrubbing tools that a have a pair of vertical axis scrub brushes are also common in the art. U.S. Pat. No. 2,220,224 discloses a hard floor scrubber having a pair of vertical axis scrub brushes. An extractor hand tool with a pair of turbine powered vertical axis scrub brushes for cleaning upholstery is disclosed in commonly owned U.S. Pat. No. 5,867,864.
When cleaning carpet or upholstery, it is desirable to use a scrub brush with relatively soft bristles rather than a relatively stiff and abrasive scrub pad. Scrub pads tend to be too abrasive for scrubbing upholstery and are likely to damage the fabric. Whereas, the bristles on a relatively soft scrub brush gently scrub the detergent into the upholstery and loosen embedded soil without damaging the fabric. A pair of vertical axis scrub brushes tends to clean carpet or upholstery more effectively than a single vertical axis or horizontal axis scrub brush. Hard surfaces, on the other hand, are more effectively cleaned with a more aggressive and abrasive scrub pad. There is a need in the art for a powered hand tool that is capable of effectively cleaning both hard surfaces using a scrub pad and carpet or upholstery with a scrub brush.
SUMMARY OF THE INVENTION
An objective of the present invention is to provide a compact hand held, wet extraction suction nozzle having powered scrub brushes.
Another objective of the present invention is to provide a compact hand held suction nozzle having a powered scrub pad.
A further objective of the present invention is to provide a powered hand tool for an extraction type cleaning machine having interchangeable brush and scrub pad scrubbing modules.
A further objective of the present invention is to provide a powered hand tool for an extraction type cleaning machine having a dual or multiple axis scrub brush module that is interchangeable with a single vertical axis scrub pad modules.
A further object of the invention is to provide a compact hand held extractor nozzle having an air turbine powered scrubbing tool.
A further object of the present invention is to provide a hand held extractor nozzle having powered scrub brushes and/or powered scrub pad that are driven by non-electrical means, in order to eliminate the danger of electrical shock when using the nozzle for wet pickup.
The foregoing and other objects of the present invention, that will be readily apparent upon reviewing the following description of a preferred embodiment and the attached drawings, are achieved in a preferred embodiment of the present invention by providing an extractor nozzle having air turbine powered scrub brushes. The turbine has at least one ambient air inlet and an outlet that communicates with a suction tube extending from the extractor or wet pickup suction nozzle. The turbine drives a pair of vertical axis rotary scrub brushes or a single vertical axis scrub pad located adjacent to the extractor nozzle. A compact gear reduction operatively connects the air turbine to the scrub brushes or to the scrub pad. The nozzle is preferably provided with a trigger actuated spray head for selectively applying cleaning liquid to a surface to be cleaned.
In one form of the present invention, an extractor nozzle is provided having an air turbine powered agitator, in which the turbine has at least one ambient air inlet and an outlet that communicates with a suction tube that is fluidly connected to the extractor or wet pickup suction nozzle.
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Dirt Devil Owner Manuel (Scrub Devil) Copyright Royal Appliance Mfg. Co. 1997.
Black & Decker Owners Manual (ScumBuster) Copyright 1996.
Bauman Robert W.
Coates Donald A.
Diehl Arne J.
Essex John D.
Miller Daniel R.
Lowe A. Burgess
Snider Theresa T.
The Hoover Company
Warden, Sr. Robert J.
Watson Bruce P.
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