Ventilation – Vehicle – Pressure regulation
Reexamination Certificate
1999-08-17
2001-06-05
Lu, Jiping (Department: 3749)
Ventilation
Vehicle
Pressure regulation
C454S071000, C454S073000, C454S074000
Reexamination Certificate
active
06241599
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a pressure regulation system for maintaining the air pressure within a defined space at a substantially constant level. The pressure regulation system has particular utility on aircraft.
There are many situations where it is desirable to maintain pressure within a defined space such as a passenger compartment at a substantially constant level. For example, to prevent passenger discomfort, it is desirable to maintain the pressure in an aircraft passenger compartment at a substantially constant level throughout a flight.
Systems for controlling aircraft cabin pressure are known in the art. U.S. Pat. No. 2,669,175 to Fischer discloses one such system. The Fischer system is designed to regulate the pressure within the passenger cabin relative to a preset pressure. The system includes a flexible diaphragm positioned within a housing; however, the diaphragm does not communicate directly with the passenger cabin. The Fischer system suffers from the deficiency that it is unnecessarily complex.
Despite the existence of systems such as Fischer's, there remains a need for pressure regulation systems which are simple in construction, which provide better pressure control, and which have a great deal of versatility.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a pressure regulation system for controlling the pressure within a defined space.
It is a further object of the present invention to provide a pressure regulation system as above which has particular utility in aircraft for controlling the pressure within a passenger compartment.
The foregoing objects are attained by the pressure regulation system of the present invention.
In accordance with one embodiment thereof, the pressure regulation system of the present invention includes a housing and a flexible diaphragm within the housing. The flexible diaphragm divides the housing into first and second chambers with the first chamber containing air at a desired pressure and the second chamber containing air at a pressure within a defined space outside the housing. The pressure regulation system further comprises means for detecting movement of the diaphragm due to a pressure imbalance between the first and second chambers and means, activated by the detecting means, for introducing air into or withdrawing air from the defined space so as to alleviate the pressure imbalance.
Other details of the pressure regulation system of the present invention, as well as other objects and advantages attendant thereto, are set forth in the following written description and the accompanying drawings, wherein like reference numerals depict like elements.
REFERENCES:
patent: 2669175 (1954-02-01), Fischer
patent: 2966109 (1960-12-01), Best
Bachman & LaPointe P.C.
Lu Jiping
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