[특허]Air flow reversal prevention door assembly

[미국특허] Air flow reversal prevention door assembly 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F24F-013/08
출원번호	US-0016063 (1998-01-30)
발명자 / 주소	Ucciardi Frank J.
출원인 / 주소	Consol, Inc.
대리인 / 주소	Paul A. Beck & Associates
인용정보	피인용 횟수 : 12 인용 특허 : 7

초록 ▼

An air flow reversal prevention door is mounted to a discharge opening of a ventilation fan. The door includes a frame member with a void in it to permit air flow to pass through the frame and is attached fixedly to a shaft which supports the door and is located between the door and a discharge opening of the ventilation fan. While the door is held open by air from the ventilation fan, the frame member is moved from the edge of the discharge opening toward the door and back and this enables the shaft to rotate because it is fixedly attached to the frame member and it causes the shaft to rotate with movement of the frame member. This causes the shaft to rotate through the entire range of motion of the door between its open position and its collapsed position. This tests the operation of the door without turning off the fan. Whenever the fan fails or is turned off the air flow ceases and the door collapses by gravity toward the discharge opening to prevent air reversal flow.

대표청구항 ▼

[ I claim:] [1.] An air flow reversal prevention door mounted to a discharge opening of a ventilation fan that permits testing of movement of the door and operation of a seal with the door while the ventilation fan is in operation the improvement comprising:a. a first means at a top of the discharge opening pivotally supporting the door in a vertical position adjacent to the discharge opening and enabling the door to pivot away from the discharge opening as an air flow from the fan pushes on the door;b. a frame member which acts as the seal when the door is closed adjacent to the discharge opening upon cessation of air flow and having a void to permit the air flow to pass through the frame; andc. a second means supporting the frame member in a vertical position between the discharge opening and the door and fixedly attached to the first means causing the first means to rotate with the frame member and cause movement of the first means when the frame member is moved relative to the door.

이 특허에 인용된 특허 (7)

Osowski Frank (R.R. #2 ; Box 150 Oslo MN 56744), Automatic culvert directional flow control device.
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Urschel ; John N. ; Urschel ; Robert P. ; Urschel ; Fred P., Back draft for exhaust fans and hoods.
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Cover Theodore L. (6161 Clovergreen Pl. St. Louis MO 63129), Combustion air vent with automatic lock.
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Tamame Antonio N. (1910 Georgia Deer Park TX 77536), Debris and weather protector for air conditional compressor cabinets.
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Sheu Muh-Chuan (No. 642 ; Chung-Cheng Road I-Chia Village ; Jen-Teh Hsiang ; Tainan Hsien TWX), Fan casing with cover.
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Toth Mick E. (Morgantown WV) McGill Robert R. (Rivesville WV), Mine ventilation tubing system and method of installation.
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Fast Ronald W. (Batavia IL), Relief device for a vacuum vessel.
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이 특허를 인용한 특허 (12)

Hertel, Peter H., Air handling system duct closure and heat trap.
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S?derlund, Per Thomas, Check valve, fan unit, and forced air cooling system.
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Christopher L. Anthony ; Adrian M. Anthony, Crawl space ventilator fan.
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Labrecque, Robert, Extraction fan assembly including a damper that closes firmly when the fan is not running and reduces the pressure drop when the fan is running at full speed.
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Labrecque, Robert, Extraction fan assembly including a damper that closes firmly when the fan is not running and reduces the pressure drop when the fan is running at full speed.
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Huët, Laurent, Flap with enhanced articulation means for an air extractor of a motor vehicle.
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Erni, Thomas W., Insulated housing apparatus for use with an attic fan.
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Labrecque, Robert, Method for controlling air flow of an extraction fan.
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Bueno Lopez Jose,ESX, Safety valve especially for pneumatic circuits.
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Regimbal, Laurent A.; Hamand, Karl Isaac; Kyle, Lawrence, Spring-loaded doors to prevent air recirculation without need for additional space.
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Huang, Jing; Luo, Jianqun; Gui, Xinchun; Tang, Aihua; Yin, Jianguo; Dong, Zhen, Tilting disc check valve.
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Chamness, Ronald Hugh, Vent cover with biased door.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Air flow reversal prevention door assembly 원문보기