Brushing – scrubbing – and general cleaning – Implements
Reexamination Certificate
1999-08-04
2001-07-24
Till, Terrence R. (Department: 1744)
Brushing, scrubbing, and general cleaning
Implements
C015S104066
Reexamination Certificate
active
06263535
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a cleaning apparatus. In particular, it relates to a cleaning apparatus used to clean caking adhered on the inner wall of a pipe.
2. Description of Prior Art
In fab, the arrangement of various pipes for transmitting waste gases is extensive and complex. Waste gas mixed with particles and toxic gases exhausted from etching and deposition processes are transmitted to a waste gas treatment device by pipes. These particles are gradually adhered onto the inner wall of the pipe and accumulate into caking over time. The toxic gases remained in these pipes are harmful to human being and environment. However, because of the complex arrangement of the pipes, it is difficult to dismantle the desired pipes for cleaning.
SUMMARY OF THE INVENTION
To solve the above problem, the primary object of this invention is to provide a scrubbing device retractably moved into the pipes to effectively separate the caking from the pipe. The scrubber comprises metal brush wheels formed with helical teeth or is provided with bristles. The scrubber is moved into the pipes by a flexible rod, and that rod can be retractably and automatically received in a chamber by a winding machine therein.
The present invention is characterized in that each of the brush wheels is formed with a plurality of helical teeth located on the circumference thereof. The caking adhered on the inner wall of the pipe can be scrubbed away by the teeth and then it is expelled out off the pipes by the suction of a vacuum cleaner.
REFERENCES:
patent: 615427 (1898-12-01), Casaday
patent: 1145626 (1915-07-01), Stover
patent: 2157493 (1939-05-01), Miller et al.
patent: 4964921 (1990-10-01), Lloyd
patent: 5045289 (1991-09-01), Bengel et al.
patent: 5966767 (1999-10-01), Lu et al.
patent: 565182 (1932-11-01), None
patent: 1524324 (1968-05-01), None
patent: 27777 (1897-11-01), None
Ladas & Parry
Till Terrence R.
Winbond Electronics Corp.
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