Method and apparatus for measuring powder flow rate

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5454271
SERIAL NO

08277212

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A powder flow rate is measured based on a simple construction so as to provide method and apparatus for measuring the powder flow rate for example of a powder coating material, requiring less maintenance cost and facilitating change of color of the coating material. In the method for measuring powder flow rate: a density .rho.1 of the powder within a tank is measured; the powder is drawn out from the tank into a conveying tube; a detecting fluid is blown at a flow rate Qf into the conveying tube a density .rho.2 of the powder in the conveying tube is measured; and a powder flow rate Fm is measured based on an equation of Fm=Qf.multidot..rho.1.multidot..rho.2/(.rho.1-.rho.2). The density .rho.1 of the powder in the tank may be measured by providing a pair of pressure measuring devices at different heights within the tank. The density .rho.2 of the powder in the conveying tube may be measured through a measurement of electrostatic capacity, light transmittance or ultrasonic wave transmittance in the conveying tube.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NIHON PARKERIZING CO., LTD.TOKYO38

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishikawa, Yutaka Tokyo, JP 61 487
Yamamoto, Masahiro Tokyo, JP 316 3452
Yanagida, Kenzo Tokyo, JP 7 62

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Ransburg-Gema AG (1)
* 4941778 Method and apparatus for measuring and regulating the flow rate of powder in a powder spraying device 16 1988
 
RID CORPORATION (1)
* 4480947 Powder flow rate measuring apparatus 26 1982
 
SAMES S.A. (1)
* 5351520 Fluidized powder flowrate measurement method and device 6 1992
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (4)
* 2005/0158,366 Method and apparatus for producing uniform small portions of fine powders and articles thereof 1 2005
* 2009/0232,886 ORAL DOSAGE COMBINATION PHARMACEUTICAL PACKAGING 12 2009
* 2010/0037,818 METHOD AND APPARATUS FOR PRODUCING UNIFORM SMALL PORTIONS OF FINE POWDERS AND ARTICLES THEREOF 0 2009
9630197 Dynamic powder dispersing system 0 2016
 
NIHON PARKERIZING CO., LTD. (1)
* 5929343 Device for measuring powder flow rate and apparatus and method for supplying powder 5 1996
 
NORDSON CORPORATION (2)
8767214 Powder flow detection 2 2011
9372108 Powder flow detection 0 2014
 
CNH INDUSTRIAL CANADA, LTD. (2)
8869629 System and method for monitoring agricultural product delivery 0 2012
* 2013/0233,088 SYSTEM AND METHOD FOR MONITORING AGRICULTURAL PRODUCT DELIVERY 2 2012
 
MICRODOSE THERAPEUTX, INC. (13)
* 5699649 Metering and packaging device for dry powders 37 1996
* 5960609 Metering and packaging method and device for pharmaceuticals and drugs 30 1998
6923979 Method for depositing particles onto a substrate using an alternating electric field 27 1999
6428809 Metering and packaging of controlled release medication 16 1999
6702683 Metering and packaging of controlled release medication 9 2002
7404968 Metering and packaging of controlled release medication 75 2004
* 2007/0087,048 Oral dosage combination pharmaceutical packaging 24 2006
7632533 Method and apparatus for producing uniform small portions of fine powders and articles thereof 6 2007
* 2009/0087,483 ORAL DOSAGE COMBINATION PHARMACEUTICAL PACKAGING 59 2007
8439033 Inhalation device 3 2008
8991390 Inhalation device and method 0 2011
9132246 Inhalation device 0 2013
9539400 Inhalation device 0 2015
 
IFP (1)
* 5639667 Process and device for monitoring by periodic excitation a flow of particles in a pipe 26 1995
* Cited By Examiner