公开(公告)号：US4494450A

公开(公告)日：1985-01-22

申请号：US332104

申请日：1981-12-18

Applicant: Pierre Avril

Inventor： Pierre Avril

IPC: A62C3/00 ,  F04D29/58 ,  F24F7/007 ,  F24F7/02

CPC classification number: A62C3/14 ,  F24F7/025 ,  F24F2011/0097

Abstract: A protective cover for an exhaust fan motor or the like actuable to withdraw the same by normally restrained positive pressure from the motor upon the monitoring of hot fumes representing a fire, thereby to expose the motor to a cooling environment little different from or substantially the same as that of its normal operation.

Abstract translation: 一种用于排气风扇电动机等的保护盖，其能够在监视表示火灾的热烟雾时通过正常约束的来自电动机的正压将其抽回，从而将电动机暴露于几乎不同于或基本相同的冷却环境 作为其正常运行。