Method for selective filtering of a fluid using porous piezoelectric material

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4904394
SERIAL NO

07010888

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A filter which is particularly useful with biological material is formed of porous piezoelectric material such as PZT or Polyvinylidene fluoride. By an application of a voltage to the piezoelectric material, the filter body is caused to vibrate so as to inhibit fouling. In a modification, the piezoelectric material is not itself porous but is bonded to a filter membrane such that vibrations of the piezoelectric material are transmitted to the membrane. Through suitable control of the vibration, the selectivity of the filter can be controlled. In other modifications the vibratory movement of the filter membrane can be produced in other ways such as electro-mechanically.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
PUBLIC HEALTH LABORATORY SERVICE BOARDEUGENE, OR0

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Blake-Coleman, Barrie C Salisbury, GB2 2 73
Clarke, David J Salisbury, GB2 34 615

Cited Art Landscape

Patent Info (Count) # Cites Year
 
T5 LABS LTD. (1)
8203568 Sharing a graphical processing unit between a plurality of programs 26 2011
 
Fiber Resin Corp. (1)
* 4352570 Vibratory treatment apparatus and method 22 1980
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (4)
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* 2006/0164,912 Method and device for making a dispersion or an emulsion 2 2003
 
SEIKO EPSON CORPORATION (1)
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Uchida; Yasunari (1)
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Kubo Technical Office (1)
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PALL CORPORATION (1)
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RICOH COMPANY, LTD. (3)
* 9033481 Liquid droplet ejection head, image forming apparatus, and manufacturing method of liquid droplet ejection head 0 2012
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* 9120320 Liquid ejection head and image forming device 1 2014
 
Yugenkaisha Kubo Technical Office (1)
* 5569388 Method of controlling the growth of microorganism in a liquid with tourmaline crystals 4 1995
 
Rosedale Products, Inc. (1)
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DRAGERWERK AG (1)
* 2007/0095,349 Respiratory mask 23 2004
 
GEORG FRITZMEIER GMBH & CO. KG (2)
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OUTOKUMPU MINTEC OY (1)
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ITO, YASUHIRO (2)
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BROTHER KOGYO KABUSHIKI KAISHA (2)
* 8172389 Filter, liquid jetting apparatus, and liquid transporting apparatus 4 2008
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TRELLEBORG AB (1)
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NV BEKAERT SA (1)
* 2004/0129,651 Metal fiber filter element 1 2003
* Cited By Examiner