In-line centrifugal fan

Rotary kinetic fluid motors or pumps – With sound or vibratory wave absorbing or preventing means...

Reexamination Certificate

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Details

C415S206000, C415S209300, C415S209400, C415S211200, C415S218100, C415S219100, C415S229000, C416S18600A, C416S188000, C416S22300B, C416SDIG004

Reexamination Certificate

active

07048499

ABSTRACT:
An inline centrifugal mixed flow fan (20) includes an axially extending intake conduit (22). An inlet cone (28) is disposed at an intake end (24). An impeller (30) is disposed downstream of the inlet cone and includes a centrally disposed wheel-back (32) rotated by an electric motor (44), plural fan blades (34) extending radially outwardly from the wheel-back and a wheel cone fixedly (36) attached to and circumscribing the wheel blades. A driver chamber (48) downstream of the impeller includes plural radially extending straight vanes (50) to direct air to an outlet end (26). The fan is configured to achieve reduced sound level and increased efficiency.

REFERENCES:
patent: 2856118 (1958-10-01), Smith
patent: 3069071 (1962-12-01), Carlson
patent: 3102679 (1963-09-01), Rudy
patent: 3312386 (1967-04-01), Hull et al.
patent: 3584968 (1971-06-01), Keith
patent: 3650633 (1972-03-01), Benoit
patent: 4218190 (1980-08-01), Nishikawa et al.
patent: 4647271 (1987-03-01), Nagai et al.
patent: 4828456 (1989-05-01), Bodzian
patent: 5336050 (1994-08-01), Guida et al.
patent: 5810557 (1998-09-01), Akinkuotu et al.
patent: 6042335 (2000-03-01), Amr
patent: 4023724 (1991-04-01), None
patent: 1224941 (1960-06-01), None
patent: 1030055 (1966-05-01), None
Loren Cook, CV—Inline and Vertical Upblast Fans, www.lorencook.com.

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