Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2000-04-19
2001-07-03
Moore, Chris K. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S324000
Reexamination Certificate
active
06253414
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention pertains to a carpet cleaning machine, commonly referred to as a carpet extractor, having headlights for illuminating the floor in front of the machine. More particularly, this application pertains to a carpet extractor having headlights, a transparent suction nozzle for observation of soiled liquid being picked up by the machine and rotating scrub brushes located behind the transparent nozzle for observation of the brushes through the transparent nozzle. Even more specifically, the present invention pertains to such a carpet extractor that has a main frame having transparent portions and in which a portion of the light emitted by the headlights is transmitted through the transparent portions of the main frame into the nozzle for illuminating liquid in the nozzle and into the brush cavity for illuminating the brushes.
2. Background Information
Carpet extractors clean carpets by distributing a cleaning liquid onto a carpet and then extracting the soiled cleaning liquid from the carpet using a suction nozzle. The soiled cleaning liquid is separated from the working air and recovered in a tank for disposal. Carpet extractors frequently employ rotating scrub brushes for distributing the cleaning liquid on the carpet, scrubbing the cleaning liquid into the carpet and loosening embedded soil for extraction with the cleaning liquid using a suction nozzle. It is desirable to enhance the visibility of the soiled cleaning liquid traveling through the nozzle and of the scrub brushes, so that the machines cleaning ability will be readily apparent to a consumer or an operator.
The suction nozzles on carpet extractors typically have a transparent outer wall and are typically located in view of the operator, whereby the operator may view the soiled cleaning liquid being sucked in through the nozzle while operating the cleaner. Such a carpet extractor is disclosed in commonly owned U.S. Pat. No. 5,500,977. It is also known in the prior art to provide a headlight on a carpet extractor nozzle for illuminating the floor in front of the nozzle, such as disclosed in U.S. Pat. No. 3,848,291. It is also known to provide an upright, dry only vacuum cleaner with a transparent window in the suction nozzle that provides visual observation of the agitator located inside the suction nozzle cavity.
SUMMARY OF THE INVENTION
An objective of the present invention is to provide a carpet extractor having enhanced visibility of the rotating scrub brush(es). More particularly, it is an object of the present invention to provide visibility of a powered scrub brush located behind the suction nozzle from the front of the machine, i.e. through the suction nozzle, and from the sides of the machine.
A further objective of the present invention is to provide a carpet extractor with improved visibility of the soiled cleaning solution traveling through the suction nozzle.
Yet another objective of the present invention is to provide a carpet extractor with at least one headlight for illuminating the floor in front of the machine, adjacent to the suction nozzle. More specifically, an objective of the invention is to provide an extractor with at least one headlight, in which a portion of the light emitted by the headlight shines onto the scrub brush, thereby enhancing visibility of the scrub brush. A further object of the invention is to utilize a portion of the light emitted by the headlight to illuminate the soiled cleaning liquid traveling through the suction nozzle.
These and other objectives, that will be readily apparent to one of skill in the art upon reading the following description and reviewing the accompanying drawings, are obtained by the present invention.
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Bradd Sidney H.
Essex John D.
Lowe A. Burgess
Moore Chris K.
The Hoover Company
Watson Bruce P.
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