Air outlet unit for a large blower assembly

Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Pump outlet or casing portion expands in downstream direction

Reexamination Certificate

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Details

C415S220000

Reexamination Certificate

active

07029234

ABSTRACT:
An air outlet unit (101) for a large blower assembly comprising an outlet tube member (103) with an upstream inner end in flow communication with the pressure side of an impeller of the blower asembly and a downstream outer end for connection with a duct and a mainly cylindrical inner tube member (105) arranged coaxially to the outlet tube member (103) and having an inner end substantially aligned with the inner end of the outlet tube member (103) and a downstream outer end, the inner tube member (105) being closed by a closing means (106). The inner tube member (105) has an open downstream end (8114) projecting in the downstream direction beyoud the downstream outer end of the outlet tube member (103) to thereby achieve a reduced pressure loss and a more uniform velocity profile.

REFERENCES:
patent: 2552118 (1951-05-01), Sawyer
patent: 2637487 (1953-05-01), Sawyer
patent: 2814433 (1957-11-01), Brinen
patent: 3471080 (1969-10-01), Gray
patent: 3566606 (1971-03-01), Mortlock
patent: 3860359 (1975-01-01), De Feo
patent: 3927521 (1975-12-01), Hugoson et al.
patent: WO 0198668 (2001-12-01), None

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