Silencing arrangement

Details Silencing arrangement Silencing arrangement

2011-04-12

2011-04-12

Phillips, Forrest M (Department: 2832)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S214000, C181S212000, C415S119000

Reexamination Certificate

active

07921962

ABSTRACT:
In an appliance, such as a cyclonic vacuum cleaner, a motor is arranged to drive an impeller fan located in a motor and fan unit. The rotation of the impeller may cause nuisance tones to be generated. A silencing arrangement is provided to control such noise and includes a plurality of discrete passive silencers in the form of tube silencers arranged in a first set and a second set. The tube silencers have open end portions arranged to face the fan and the silencers of the first set are spaced from the silencers of the second set in both axial and radial directions. This combination gives the same effect as an array of closely spaced tube silencers—however, by spacing the silencers in two directions, fluid is allowed to flow freely.

REFERENCES:
patent: 4786231 (1988-11-01), Kelley
patent: 5159738 (1992-11-01), Sunagawa et al.
patent: 5326317 (1994-07-01), Ishizu et al.
patent: 6158082 (2000-12-01), Beckey et al.
patent: 2005/0044654 (2005-03-01), Ni
patent: 2006/0153674 (2006-07-01), Kamoshita et al.
patent: 2008/0256744 (2008-10-01), Rowntreer et al.
patent: 1 510 166 (2005-03-01), None
patent: 23994 (1913-05-01), None
patent: 2007-282766 (2007-11-01), None
patent: WO 02/052109 (2002-07-01), None
patent: WO 02/052110 (2002-07-01), None
GB Search Report directed at application No. GB0903411.7 dated May 25, 2009.
International Search Report and Written Opinion mailed Jun. 18, 2010 directed to PCT/GB2010/050244; 9 pages.

Affiliated with

Also associated with

Rating

Silencing arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Silencing arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silencing arrangement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2712762