Blower assembly including exhaust restriction device

Details Blower assembly including exhaust restriction device Blower assembly including exhaust restriction device

2005-08-16

2005-08-16

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Casing having tangential inlet or outlet

C415S206000, C415S211200, C415S212100

Reexamination Certificate

active

06929448

ABSTRACT:
A blower assembly that includes an exhaust restrictor to aid in operating the blower assembly over a range of operating conditions. The blower assembly includes a blower housing having a housing exhaust opening that receives a flow of exhaust gases created by a rotating impeller. An exhaust transition section extends between the housing exhaust opening to an expanded diameter exhaust outlet sized to receive a flue pipe. The blower housing includes an exhaust restrictor positioned in the exhaust transition section between the housing exhaust opening and the exhaust outlet. The exhaust restrictor is integrally formed with a portion of the blower housing and includes a curved back wall to aid in the transition between the housing exhaust opening and the exhaust outlet.

REFERENCES:
patent: 5314300 (1994-05-01), Gatley, Jr. et al.
patent: 5316439 (1994-05-01), Gatley, Jr. et al.
patent: 5971292 (1999-10-01), Roy et al.
patent: 6468034 (2002-10-01), Garrison et al.
patent: 6530346 (2003-03-01), Coones et al.
patent: 6575696 (2003-06-01), Lyons et al.

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