F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
237/20, 237/5
F28F 9/22 (2006.01) F24H 9/02 (2006.01) F28F 27/02 (2006.01)
Patent
CA 1101815
ABSTRACT OF THE INVENTION A uni-directional valve arrangement placed in a predetermined location between a habitable enclosure and a heating or cooling system which is exposed to outdoor tempera- tures prevents air of undesirable temperature in the system from passing into the enclosure by gravity flow.
308874
Mamo Anthony C.
Vary Robert F.
Bvm Ltd.
Mcfadden Fincham
LandOfFree
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