ELEVATOR CEILING VENTILATION CAVITY

WIPO Patent Application WO2006011914

A3

An elevator cab ceiling includes an upper ceiling panel and a lower ceiling panel that are vertically spaced apart from each other with an intermediate ceiling cavity between them. An inlet duct is associated with the upper ceiling panel and an outlet duct is associated with the lower ceiling panel. The inlet and outlet ducts are horizontally spaced apart from each other and are fluidly connected to each other through the intermediate ceiling cavity to form a ventilation path. This separation of inlet and outlet ducts by an intermediate ceiling cavity reduces airborne noise transmissions that enter an elevator cab through the ventilation path. In one example, at least one baffle is installed within the intermediate ceiling cavity between the inlet and outlet ducts to interrupt a flow between the inlet and outlet to further reduce any transmitted noise.

JPH1148117	METHOD FOR REFORMING SURFACE OF OPTICAL MATERIAL
JPS5815266	[Title of the Invention] Polish tool
JP3791722	PLANOGRAPHY BLOCK SUPPORT AND METHOD OF PRODUCING THE PLANOGRAPHY BLOCK SUPPORT

OPOKU DANIEL (US)
BONILHA MURILO W (US)
LI WENLONG (US)
ALVES GOLDINO (US)
JAYACHANDRAN VIJAY (US)

PCT/US2005/006615

July 27, 2006

March 02, 2005

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OTIS ELEVATOR CO (US)
OPOKU DANIEL (US)
BONILHA MURILO W (US)
LI WENLONG (US)
ALVES GOLDINO (US)
JAYACHANDRAN VIJAY (US)

B24D13/00; F24F7/00; B60H1/00; B60H1/24; B60H1/26; B61D27/00; B66B11/02

US2265623A	1941-12-09
US5080003A	1992-01-14
US5306208A	1994-04-26

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