F - Mech Eng,Light,Heat,Weapons – 24 – F
Patent
F - Mech Eng,Light,Heat,Weapons
24
F
F24F 7/013 (2006.01) F04D 29/52 (2006.01) F24F 13/20 (2006.01) H05K 5/00 (2006.01)
Patent
CA 2328261
An electric exhaust fan has generally conventional components and is normally mounted in a window pane in known manner. The fan has a door, consisting of two rotatably mounted shells 14 and 15, that closes off a front face 11 of the fan. The door is opened and closed by a motor 24 that has a drive gear 23. The drive gear 23 engages gearing 14A and 15A formed on respective side walls of the shells. Opposite side walls of the shells have gearing 14B and 15B that mesh with one another. The door provided by the shells 14 and 15 is more aesthetic pleasing that slatted doors of the prior art. Also, the door remains open, once it has been fully opened, without requiring to supply power to the motor 24 to keep the door open.
Dennison Associates
Yip Chung Lun
LandOfFree
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