back draft


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back draft

[′bak ‚draft]
(metallurgy)
A reversed taper given to a casting model or pattern to prevent its withdrawal from the mold.
References in periodicals archive ?
Neither series nor parallel units have sealed panels and the parallel unit has a back draft damper designed to stop leakage of cold air to the plenum when the fan is not running.
However, as he got closer, a back draft of smoke, fire, and extinguishing agent blew back in his face, forcing him to back up.
Localized fume extractor devices include down draft, back draft, and snorkel exhaust vents, which are used in histology/gross dissection and special chemistry.
She was obviously too busy rummaging through rails of skirts, tops and vests to notice the, erm, back draft.
In Minnesota, if designers specify 1,200-cfm hoods, they must provide another opening to create positive pressure to prevent back draft.
Depending on where the fireplace is installed, smoke can back draft into the house," Dischner says, "so the guidelines are good at indicating where the fireplace should be located.
Bruce shot the buck with a Browning Back Draft bow set at 72 pounds.
My favourite book of all time is Confessions Of A Luxury Liner by Timothy Lea and the best movie is Back Draft where they get up close and personal with some of the fiercest fires you'll ever see.
Holes are often elliptical with back draft to prevent sprue hangup.
Solicitation: Extra high effieciency back draft and downdraft table with airflow self contained high performance industrial aircleaner
He was going to go in but if he'd have opened the door, the back draft might have killed them both.