Patents by Inventor Pasi Karki
Pasi Karki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11340145Abstract: The invention relates to an apparatus (100) for collecting dust samples. The apparatus comprises a piston (102) and a cylinder (110) for holding the piston with a body having a hole (108) extending through the body. The cylinder (110) has a first end (112), which is open, the first end of the cylinder being slanted such that underside (130) of the cylinder extends farther than upper side (132). A mechanism (114) moves the piston between inward and outward positions. The apparatus gathers dust flowing past the piston into the hole of the piston when the piston is in the outward position and moves the gathered dust by moving the piston into the inward position. An input feed (116) is configured to spread fluid through the hole filled with dust to flush the dust to an output feed (118).Type: GrantFiled: May 12, 2021Date of Patent: May 24, 2022Assignee: VALMET AUTOMATION OYInventors: Petri Janhunen, Ilkka Pyykkönen, Pasi Kärki, Timo Sirviö
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Publication number: 20210364396Abstract: The invention relates to an apparatus (100) for collecting dust samples. The apparatus comprises a piston (102) and a cylinder (110) for holding the piston with a body having a hole (108) extending through the body. The cylinder (110) has a first end (112), which is open, the first end of the cylinder being slanted such that underside (130) of the cylinder extends farther than upper side (132). A mechanism (114) moves the piston between inward and outward positions. The apparatus gathers dust flowing past the piston into the hole of the piston when the piston is in the outward position and moves the gathered dust by moving the piston into the inward position. An input feed (116) is configured to spread fluid through the hole filled with dust to flush the dust to an output feed (118).Type: ApplicationFiled: May 12, 2021Publication date: November 25, 2021Applicant: VALMET AUTOMATION OYInventors: Petri JANHUNEN, Ilkka PYYKKÖNEN, Pasi KÄRKI, Timo SIRVIÖ
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Patent number: 10317340Abstract: An apparatus for optically measuring fluidal matter having fluid as medium and particles non-dissolved in the medium wherein the apparatus comprises a measurement chamber, which is configured to contain the fluidal matter, and a nozzle. The nozzle receives flowable matter and emits a jet of the flowable matter towards or fromwards an optical detector which is associated with the measurement chamber and receives optical radiation from the fluidal matter in the measurement chamber.Type: GrantFiled: December 8, 2017Date of Patent: June 11, 2019Assignee: VALMET AUTOMATION OYInventor: Pasi Kärki
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Patent number: 10261015Abstract: A solution for measuring a suspension which contains wood fibres. The consistency of the suspension is changed in a consistency range. Optical radiation is directed at the suspension and the intensity of optical radiation interacted with the suspension is measured at different consistencies in the consistency range. The maximum intensity of the optical radiation is determined within the consistency range. At least one of the following properties of the suspension are determined based on the determined maximum intensity: kappa number, brightness.Type: GrantFiled: November 14, 2017Date of Patent: April 16, 2019Assignee: VALMET AUTOMATION OYInventors: Pasi Kärki, Matti Törmänen
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Publication number: 20180172585Abstract: An apparatus for optically measuring fluidal matter having fluid as medium and particles non-dissolved in the medium wherein the apparatus comprises a measurement chamber, which is configured to contain the fluidal matter, and a nozzle. The nozzle receives flowable matter and emits a jet of the flowable matter towards or fromwards an optical detector which is associated with the measurement chamber and receives optical radiation from the fluidal matter in the measurement chamber.Type: ApplicationFiled: December 8, 2017Publication date: June 21, 2018Applicant: VALMET AUTOMATION OYInventor: Pasi KÄRKI
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Publication number: 20180164212Abstract: A solution for measuring a suspension which contains wood fibres. The consistency of the suspension is changed in a consistency range. Optical radiation is directed at the suspension and the intensity of optical radiation interacted with the suspension is measured at different consistencies in the consistency range. The maximum intensity of the optical radiation is determined within the consistency range. At least one of the following properties of the suspension are determined based on the determined maximum intensity: kappa number, brightness.Type: ApplicationFiled: November 14, 2017Publication date: June 14, 2018Applicant: VALMET AUTOMATION OYInventors: Pasi KÄRKI, Matti TÖRMÄNEN
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Publication number: 20170292911Abstract: An apparatus includes a piston cavity, a piston insertable in the piston cavity, and at least one flow cavity. Each flow cavity is inserted in the piston, alongside the piston cavity such that the flow cavity has a connection with the piston cavity, or between the piston and a wall of the piston cavity by means of one or more differences in cross section between the piston and the piston cavity, and the flow cavity is in contact with a liquid substance being processed. The piston moves back and forth inside the piston cavity and causes with its movement a flow of the liquid substance in each flow cavity in connection with measuring the liquid substance.Type: ApplicationFiled: October 23, 2015Publication date: October 12, 2017Applicant: VALMET AUTOMATION OYInventors: Pasi KÄRKI, Tuomo TOMPERI
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Patent number: 9534988Abstract: A sampler including an ejector and a sample channel extending to the ejector, which are placeable in a mixture of particles of a solid and a medium, the medium being a gas and/or a liquid. The ejector includes at least one inlet and an outlet. The ejector takes a mixture sample by using vacuum via the inlet and discharges it via the outlet so as to make the mixture sample flow from the inlet towards the outlet. The sample channel takes a desired measuring sample from the mixture sample flowing in the ejector, the solid particles and the medium being at least partly separable from one another in the ejector on the basis of the flow and inertia in the mixture sample.Type: GrantFiled: June 28, 2012Date of Patent: January 3, 2017Assignee: VALMET AUTOMATION OYInventor: Pasi Kärki
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Patent number: 9039272Abstract: A measuring device comprising at least one mixer structure to receive a fiber suspension sample from at least one process part. Each mixer structure is provided with a measuring unit, a feeding valve for feeding feed liquid into a sample line for pushing the sample in the sample line towards the measuring unit, a mixing valve structure for feeding dilution liquid into the mixer structure The mixer structure mixes the flowing sample and the dilution liquid with one another in order to reduce the consistency of the sample. The measuring device measures from the first part of the mixed sample one property of the fiber suspension and the measuring device measures from the second part of the mixed sample a further property.Type: GrantFiled: March 31, 2006Date of Patent: May 26, 2015Assignee: METSO AUTOMATION OYInventor: Pasi Kärki
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Publication number: 20140130615Abstract: A sampler including an ejector and a sample channel extending to the ejector, which are placeable in a mixture of particles of a solid and a medium, the medium being a gas and/or a liquid. The ejector includes at least one inlet and an outlet. The ejector takes a mixture sample by using vacuum via the inlet and discharges it via the outlet so as to make the mixture sample flow from the inlet towards the outlet. The sample channel takes a desired measuring sample from the mixture sample flowing in the ejector, the solid particles and the medium being at least partly separable from one another in the ejector on the basis of the flow and inertia in the mixture sample.Type: ApplicationFiled: June 28, 2012Publication date: May 15, 2014Applicant: METSO AUTOMATION OYInventor: Pasi Kärki
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Publication number: 20080250848Abstract: A measuring device comprising at least one mixer structure to receive a fibre suspension sample from at least one process part. Each mixer structure is provided with a measuring unit, a feeding valve for feeding feed liquid into a sample line for pushing the sample in the sample line towards the measuring unit, a mixing valve structure for feeding dilution liquid into the mixer structure The mixer structure mixes the flowing sample and the dilution liquid with one another in order to reduce the consistency of the sample. The measuring device measures from the first part of the mixed sample one property of the fibre suspension and the measuring device measures from the second part of the mixed sample a further property.Type: ApplicationFiled: March 31, 2006Publication date: October 16, 2008Inventor: Pasi Karki
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Patent number: 6703618Abstract: The invention relates to a method and a measurement device for measuring a suspension which contains wood fibers, the method comprising directing optical radiation at pulp and measuring optical radiation emitted by the pulp. The solution comprises measuring at least one of the following two properties; kappa number and brightness. The solution comprises changing the pulp consistency in a desired range of consistency extending from a desired initial consistency to a desired final consistency. The pulp consistency and the strength of a desired wavelength from the optical radiation are measured in the desired consistency range. Measurement points are modeled with a function of the desired type by fitting the parameters of the function according to the measurement points. Finally at least one of the following two properties of the pulp is determined by means of the modeling function; kappa number and brightness.Type: GrantFiled: July 8, 2002Date of Patent: March 9, 2004Assignee: Metso Automation OyInventors: Pasi Kärki, Antti Kemppainen, Arvo Rahikkala
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Publication number: 20030030005Abstract: The invention relates to a method and a measurement device for measuring a suspension which contains wood fibers, the method comprising directing optical radiation at pulp and measuring optical radiation emitted by the pulp. The solution comprises measuring at least one of the following two properties: kappa number and brightness. The solution comprises changing the pulp consistency in a desired range of consistency extending from a desired initial consistency to a desired final consistency. The pulp consistency and the strength of a desired wavelength from the optical radiation are measured in the desired consistency range. Measurement points are modeled with a function of the desired type by fitting the parameters of the function according to the measurement points. Finally at least one of the following two properties of the pulp is determined by means of the modeling function: kappa number and brightness.Type: ApplicationFiled: July 8, 2002Publication date: February 13, 2003Inventors: Pasi Karki, Antti Kemppainen, Arvo Rahikkala