Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
1999-07-14
2001-01-23
Warden, Sr., Robert J. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S413000, C015S327600, C015S323000
Reexamination Certificate
active
06175988
ABSTRACT:
FIELD OF THE INVENTION
The present invention pertains to a tank mounted electric motor driven bypass type vacuum cleaner apparatus adapted for wet/dry cleaning operations.
BACKGROUND
In the art of motor driven vacuum cleaners there have been substantial development efforts directed to providing apparatus driven by electric motors, in general, which are tank mounted, are basically of the bypass type and are adapted for wet/dry cleaning operations. In the further development of this general type of vacuum cleaner there has been a continuing need to provide a compact, easily used apparatus which is economical to manufacture but which is also provided with features which are necessary and desirable. Such features include construction of the apparatus to provide a minimum number of parts which may be easily fabricated, assembled and disassembled. Operational features which are desirable include reduced noise emission and circulation of motor cooling air to and from the apparatus, also at reduced noise emission, and without mixing heated cooling air flowing away from the motor, as well as bypass vacuum exhaust airflow with motor inlet cooling air. Further operational features which have been sought include stability of the apparatus when in use to minimize the chance of debris collection tank upset, portability, and storage for the vacuum cleaner pickup hose and associated tools or nozzles, and the power cord. It is to the above-mentioned ends as well as providing other desiderata in portable tank type vacuum cleaner apparatus that the present invention has been directed.
SUMMARY OF THE INVENTION
The present invention provides an improved vacuum cleaner apparatus which is adapted for both wet and dry cleaning operations.
In accordance with one important aspect of the invention, a motor driven vacuum cleaner apparatus is provided which includes an improved arrangement and combination of a debris collection tank, a tank cover, a motor support base member, a motor cover or housing and a cooling airflow shroud and carrying handle. The aforementioned parts are configured to be easily fabricated and assembled to each other and disassembled from each other. In particular, the cooling airflow shroud is provided with a carrying handle which is also provided with a recess for receiving a portion of a flexible vacuum or debris pickup hose.
In accordance with another aspect of the invention a lightweight, portable, tank-type bypass vacuum cleaner is provided which includes a debris collection tank and motor housing assembly configured to provide for convenient storage of an elongated flexible debris pickup hose. Still further, the debris collection tank is configured to releasably support a conduit member which is connectable to the flexible debris pickup hose, which conduit member may be removed from the debris collection tank and used as an air blower nozzle by connecting the conduit and the flexible hose to the apparatus vacuum air exhaust port. Still further, the debris collection tank is adapted to provide a recess for supporting a vacuum cleaning nozzle or the like.
The vacuum cleaner apparatus of the present invention further provides an improved arrangement of parts for conducting motor cooling airflow to and from an electric motor for driving a vacuum air impeller of the apparatus. An arrangement of a motor housing and cooling air shroud or cover provides for unobstructed cooling airflow while reducing noise emissions and while directing the cooling airflow in such a way as to substantially prevent commingling of heated motor cooling air being discharged from the apparatus with ambient cooling air being drawn into the motor cooling air inlet flowpath.
The present invention still further provides a portable lightweight motor driven vacuum cleaning apparatus which includes a debris collection tank having a configuration which provides improved stability of the apparatus in use to reduce the chance of upset, a convenient carrying handle and hose storage arrangement and an improved power cord storage arrangement.
Those skilled in the art will further appreciate the above-mentioned advantages and superior features of the vacuum cleaner apparatus of the invention together with other important aspects thereof upon reading the detailed description which follows in conjunction with the drawing.
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DeBlasis Thomas J.
Mariano Dino A.
Potts Aaron J.
White James A.
Akin Gump Strauss Hauer & Feld L.L.P.
Overhead Door Corporation
Snider Theresa T.
Warden, Sr. Robert J.
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