Cutoff for fan or blower

Details Cutoff for fan or blower Cutoff for fan or blower

2006-12-05

2006-12-05

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Scroll or helical type casing with specific exit nozzle

C415S206000, C415S119000, C415S053300

Reexamination Certificate

active

07144219

ABSTRACT:
A cutoff for a blower housing. The cutoff comprises a cutoff having an edge, the edge includes first and second ends and a midsection. The midsection includes an acoustical reduction section. Each end includes an efficiency enhancing portion curving from a first smaller radial dimension to a second greater radial dimension proximal the acoustical reduction section. The acoustical reduction section is located between the first and second ends and has a greater third radial dimension greater than the first or second radial dimensions.

REFERENCES:
patent: 5279515 (1994-01-01), Moore et al.
patent: 5449271 (1995-09-01), Bushnell et al.
patent: 5570996 (1996-11-01), Smiley, III
patent: 5772399 (1998-06-01), Mehta et al.
patent: 5868551 (1999-02-01), Smiley, III et al.
patent: 6200093 (2001-03-01), Lee et al.
patent: 6677564 (2004-01-01), Sohn et al.
Publication: “The Leader”, Title: “New Air Handler Features Better Performance in a Smaller Cabinet”, Spring 2004, p. 6, vol. 13, Issue 1.

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