[특허]Air flow control apparatus

Air flow control apparatus 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F24F-013/10
출원번호	US-0758463 (1991-09-06)
발명자 / 주소	Curran John R. (180 Ebenezer Rd. Osterville MA 02655)
인용정보	피인용 횟수 : 34 인용 특허 : 0

초록 ▼

A flow control apparatus for controlling the flow of a low pressure air stream in an air duct of an air ventilation system includes a conduit section having spaced upstream and downstream ports in upstream and downstream portions thereof, a redirecting member in the conduit section for redirecting air in the upstream portion thereof so that it passes outwardly through the upstream port, and a loose flexible membrane operable for redirecting air passing outwardly through the upstream port so that it passes back inwardly through the downstream port. The apparatus further includes an outer housing defining an enclosed chamber around the outer side of the membrane and a controller for controlling the air pressure in the membrane in order to selectively collapse the membrane around the ports in the conduit section. The controller is operative for controlling the air pressure in the chamber by selectively connecting the upstream end of the conduit section to the chamber and selectively bleeding air off therefrom.

대표청구항 ▼

A flow control apparatus for controlling the flow of a low pressure air stream in an air duct of an air ventilation system comprising: a. conduit means including an upstream conduit section for receiving said airstream therein at an upstream pressure level and a downstream conduit section for discharging said airstream outwardly therefrom at a lower downstream pressure level, said upstream conduit section having at least one upstream port therein for passing air outwardly therethrough, said downstream conduit section having at least one downstream port therein for receiving air inwardly therethrough; b. valve means operable in open and closed positions and including a loose flexible membrane on said conduit means, said membrane being operable in an open position for directing air passing outwardly through said at least one upstream port so that it thereafter passes inwardly through said at least one downstream port, said membrane being operable in an at least partially inwardly collapsed closed position for obstructing the passage of air from said at least one upstream port through said at least one downstream port, said membrane being constructed so that it is movable between the open and closed positions thereof without being elastically deformed, and being configured to be normally retained in the open position thereof by the pressure of the air passing from said at least one upstream port to said at least one downstream port, said membrane being spaced outwardly from said at least one upstream port and said at least one downstream port by a sufficient amount to permit air to flow substantially unrestricted from said at least one upstream port to said at least one downstream port when said membrane is in the open position thereof; c. pressure reducing means for reducing the pressure of air passing from said upstream conduit section to said downstream conduit section from said upstream level to said downstream level, said pressure reducing means including said at least one upstream port, said at least one downstream port and redirecting means redirecting air passing through said upstream conduit section so that it passes outwardly through said at least one upstream port; d. chamber means defining an enclosed chamber around the outer side of said membrane; and e. control means selectively connecting said pressure chamber to said upstream conduit section for receiving air therefrom in said pressure chamber at said upstream pressure level in order to move said membrane to the closed position thereof and selectively bleeding air off from said pressure chamber to move said membrane to the open position thereof.

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