Fluid handling – Systems – Programmer or timer
Reexamination Certificate
2003-01-29
2004-08-31
Lee, Kevin (Department: 3753)
Fluid handling
Systems
Programmer or timer
C137S862000, C137S870000, C137S876000, C137S887000
Reexamination Certificate
active
06782919
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a revolving valve for an oxygen machine, and more particularly, to a revolving valve to provide a constant fresh air supply.
BACKGROUND OF THE INVENTION
There are various oxygen machines used by hospitals for medical purposes. The principle of the oxygen machine is to suck air through a filter to obtain oxygen and output through the machine.
Most of the machines use electromagnetic valves to control air inlet and to expel other gas and output oxygen. These electromagnetic valves are controlled by a circuit system, which are complicated and require frequent maintenance. That is not cost effectiveness.
SUMMARY OF THE INVENTION
It is the primary object of the present invention to provide a revolving valve for an oxygen machine, which maintains a constant oxygen output.
It is another object of the present invention to provide a revolving valve for an oxygen machine, which design is simple and is cost effectiveness.
It is a further object of the present invention to provide a revolving valve for an oxygen machine, which is easy to maintain and is more reliable.
REFERENCES:
patent: 2367319 (1945-01-01), Wahlberg
patent: 3092073 (1963-06-01), Conde
patent: 4190082 (1980-02-01), Crespo
patent: 4787417 (1988-11-01), Windsor
patent: 5353838 (1994-10-01), Grant
patent: 5368072 (1994-11-01), Cote
Lee Kevin
Rosenberg , Klein & Lee
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