Laser diffraction-type particle size distribution measuring method and apparatus

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United States of America Patent

PATENT NO 5428443
SERIAL NO

08134116

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Abstract

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A particle-size distribution measuring apparatus and method is provided for suspending a sample containing particles in a fluid and introducing the suspended particles into a sample cell. The sample cell is illuminated with light from a laser source and the diffracted light from the particles is measured by an optical detector array. A computer circuit is capable of computing a plurality of graphs of particle-size distribution in repetitive measurement over a predetermined time period. A video display discloses the plurality of graphs in a juxtapositioned arrangement or stacked arrangement to enable the observer to distinguish between any variations in adjacent graphs.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
HORIBA, LTD.KYOTO249

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kitamura, Hiroyuki Miyanohigashi, JP 30 213
Togawa, Yoshiaki Miyanohigashi, JP 34 313
Ukon, Juichiro Miyanohigashi, JP 22 133

Cited Art Landscape

Patent Info (Count) # Cites Year
 
TOA MEDICAL ELECTRONICS CO., LTD. (1)
* 5059395 Particle analyzing apparatus 16 1988
 
OTSUKA ELECTRONICS CO., LTD. (1)
* 5015094 Particle size measuring system 11 1989
 
HORIBA, LTD. (1)
* 5305072 Laser scattering particle-size distribution analyzer with improved sample container discharge 15 1992
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (2)
8634072 Methods and apparatus for determining characteristics of particles 11 2010
* 2010/0225,913 METHODS AND APPARATUS FOR DETERMINING CHARACTERISTICS OF PARTICLES 19 2010
 
Malvern Instruments, Ltd. (2)
* 6778271 Measurement of particle size distribution 8 1999
6800251 Sample handling system 4 2001
 
THROMBODYNE, INC. (1)
* 6043871 System and method for measuring blood platelet function 27 1998
 
MERCK MILLIPORE LIMITED (2)
* 6643018 Optical scattering monitor 2 2001
* 2002/0027,656 Optical scattering monitor 0 2001
 
HONEYWELL INTERNATIONAL INC. (2)
* 7843563 Light scattering and imaging optical system 3 2005
* 2007/0041,013 A LIGHT SCATTERING AND IMAGING OPTICAL SYSTEM 18 2005
 
INFICON, INC. (2)
6906799 Signal processing method for in-situ, scanned-beam particle monitoring 2 2002
* 2003/0076,494 Signal processing method for in-situ, scanned-beam particle monitoring 5 2002
 
HORIBA, LTD. (4)
* 6864979 Particle size distribution measuring apparatus 2 2001
* 2002/0071,119 Particle size distribution measuring apparatus 0 2001
* 9297736 Particle size distribution measuring device 0 2011
* 2011/0213,581 PARTICLE SIZE DISTRIBUTION MEASURING DEVICE 1 2011
 
AGGREDYNE, INC. (2)
8289514 Systems for measuring properties of a physiological fluid suspension 0 2009
8559007 Systems for measuring properties of a physiological fluid suspension 0 2012
* Cited By Examiner