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1. (WO2002028259) APPARATUS FOR CONDUCTING AIR INTO BAGS OF VACUUM CLEANERS

Pub. No.:    WO/2002/028259    International Application No.:    PCT/US2001/025202
Publication Date: Apr 11, 2002 International Filing Date: Aug 10, 2001
IPC: A47L 5/28
A47L 9/14
A47L 9/24
Applicants: ORECK HOLDINGS, LLC
Inventors: PATERSON, Chris, M.
LAMB, Dennis
Title: APPARATUS FOR CONDUCTING AIR INTO BAGS OF VACUUM CLEANERS
Abstract:
Contoured exhaust ducts (112) for transmitting a particulate-laden airstream from a conduit (110) into a bag (30) of an upright vacuum cleaner (102) are disclosed. In one embodiment, the airstream is turned by a transitional section (196) of the exhaust by about 90 degrees. The interior of the exhaust duct (112) is smoothly contoured through such transition for avoiding the generation of excessive noise and turbulence. The contoured surface (198) of the transitional section (196) prevents heavy objects entrained in the airstream from rebounding back in a direction against the airflow. The cross-sectional area of the exhaust duct (112) may be maintained constant despite a change in cross-sectional shape from the inlet to the outlet thereof.