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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0665425 (1976-03-10) |
발명자 / 주소 |
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출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 21 인용 특허 : 0 |
A train tunnel is ventilated by closing an exit end of the tunnel as a train approaches the entrance end, so that during passage through the tunnel the train acts as a loose piston moving through a long closed cylinder, to cause a rapid airflow rearwardly around the train.
A method for ventilating a train tunnel that has entrance and exit ends, comprising: closing said tunnel against the free flow of air from the exit end thereof and maintaining said tunnel closed, while driving said train through said tunnel toward the exit end thereof; and opening the exit end of sa
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