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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Liddell; Sarah Helen
Address:
Malmesbury, GB
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
7921962 Silencing arrangement April 12, 2011
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










 
 
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