Brushing – scrubbing – and general cleaning – Machines – Brushing
Reexamination Certificate
1999-05-13
2001-01-09
Spisich, Mark (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
Brushing
C015S052100, C015S302000, C015S103000
Reexamination Certificate
active
06170109
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field of the Invention
The present invention relates to an automatic cleaning machine for outer wall of high-rise buildings which can vertically move during cleaning action and easy to operate.
2. Description of the Prior Art
At present, cleaning high-rise surfaces such as glass windows, outer wall of high-rise buildings and advertising boards are unavoidable. Yet, there is not any efficient machine for such purpose. Manual cleaning using personnels to be carried with the platform is generally used which is laborious, dangerous, time-consuming and very costly, yet the outcome is not satisfactory since there are many blind spots on the large area which limit the range of manual cleaning. Hazard can also happen by abnormal air turbulance between high-rise buildings. Besides, sun-burning or wind-chilling atmosphere makes it even more difficult to find labors for such work with the very high risk.
There have been prior inventions; U.S. Pat. No. 5,465,446 of Chang KK and U.S. Pat. No. 5,715,557, which can work automatically. However, their machines can do the cleaning action only when the machines are held in fixed position on the wall by mean of vacuum suction cups which require very smooth surface to do so. On a normal slightly rough surface like the outer surface of a concrete wall, it is thus impossible to use their machines since there will always be small empty spaces for air to continuously flow through and therefore vacuum can not be achieved.
The present invention, however, can clean both thoroughly smooth surfaces like glass windows and slightly rough surfaces like cement walls outside high-rise buildings with highest efficiency. This machine can move at the same time while it is cleaning the surfaces and thereby cleaning can be performed continuously and save lots of time and efforts.
SUMMARY OF THE INVENTION
A machine for cleaning outer wall of a high-rise building using a pneumatic system consists of a case divided into at least 3 chambers vertically arranged having an opened-anterior side where the edge of each of the three chambers having rubber plates or brushes mounted all along its rim.
In each upper and lower chamber there mounted a roller having its surface align with edge of said rubber plate. At the back of each of two chambers, there is a hollow tube mounted thereto with one end inside and the other end outside each chamber. Within each hollow tube at its external part outside the machine case, there is a right-angled tube installed with its one end inside the hollow tube pointed away from the case and its other end outside the hollow tube connected to an air pump in a manner that when the pump is turned on, there creates forces resulting in pressing the machine against a wall to be cleaned. Machine can move vertically by mean of pulling or releasing a cable tied at the top of the case.
In the middle chamber of the machine, there is a drum-brush whose hair sticking out over the level of said rubber plate edge, where at the back of middle chamber there is tubing(s) to eject water and/or detergent solution to the drum-brush, and where the drum-brush is motor-driven in cleaning the wall. This machine is pressed against a wall to be cleaned by using a pneumatic system or a vacuum system, and is able to move along the wall while cleaning.
REFERENCES:
patent: 3497902 (1970-03-01), Hartigan
patent: 3604049 (1971-09-01), Hetman
patent: 3641607 (1972-02-01), Lemelson
patent: 4025984 (1977-05-01), Hoener, Jr.
patent: 4112535 (1978-09-01), Wild et al.
patent: 4136419 (1979-01-01), Hetman et al.
patent: 4198724 (1980-04-01), Fisher et al.
patent: 4257138 (1981-03-01), Clements et al.
patent: 4797969 (1989-01-01), Caduff
patent: 4800607 (1989-01-01), Fukutomi
patent: 5465446 (1995-11-01), Chang
patent: 5655247 (1997-08-01), Allen et al.
patent: 5715557 (1998-02-01), Hsu
patent: 5890250 (1999-04-01), Lange et al.
patent: 53-139359 (1978-12-01), None
patent: 1-163517 (1989-06-01), None
patent: 5-49554 (1993-03-01), None
patent: 6-90885 (1994-04-01), None
Jesadanont Apijade
Jesadanont Mongkol
Jesadanont Sukanya N.
LandOfFree
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