| 摘要 |
A system for venting exhaust fumes from vehicle engines being operated in enclosed spaces, such as in residential garages. The system provides for conveying the gases from the vehicle exhaust pipe through an opening formed in the garage door or the like. The equipment includes a door port mounted in the garage door opening and which defines a passage with a cylindrical interior surface extending through the door. An exterior closure plate is pivotally mounted on the outside of the door port to swing between a closed vertical position covering the passage and an upward, horizontal, open position. The interior surface of the sleeve has an inwardly projecting radial rib that defines an arcuate portion of an internal helical thread. The exhaust fumes are conveyed from the exhaust pipe to the door passage by flexible tubing formed with helical corrugations that define an external helical thread. One end of the tubing has a cylindrical outer surface extending beyond the helical corrugations and adapted to slide through the door port passage to engage and lift the closure plate. When the tubing is then rotated about its axis, the external thread engages the internal helical portion to retain the tubing against axial movement that could cause disconnection.
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