Patents by Inventor Juha Lahtinen
Juha Lahtinen 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: 9518828Abstract: The invention relates to measuring devices to be used in physical measuring, and more particularly, to a method and a device for measuring the progress of a moving person. In the solution according to the invention the quantities describing the progress of the moving person are being calculated based on step cycle-specific acceleration stage characteristic accelerations a+ and step cycle-specific braking stage characteristic acceleration a? obtained from acceleration values measured by means of an acceleration sensor, and on the measured time. The invention aims at providing a solution, better and simpler than prior solutions, for measuring the progress of a moving person, which solution is applicable for use in a multitude of measuring solutions for ways of locomotion of various types.Type: GrantFiled: December 19, 2007Date of Patent: December 13, 2016Assignee: MURATA ELECTRONICS OYInventors: Ulf Meriheinä, Juha Lahtinen
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Publication number: 20080255800Abstract: The invention relates to measuring devices to be used in physical measuring, and more particularly, to a method and a device for measuring the progress of a moving person. In the solution according to the invention the quantities describing the progress of the moving person are being calculated based on step cycle-specific acceleration stage characteristic accelerations a+ and step cycle-specific braking stage characteristic acceleration a? obtained from acceleration values measured by means of an acceleration sensor, and on the measured time. The invention aims at providing a solution, better and simpler than prior solutions, for measuring the progress of a moving person, which solution is applicable for use in a multitude of measuring solutions for ways of locomotion of various types.Type: ApplicationFiled: December 19, 2007Publication date: October 16, 2008Inventors: Ulf Meriheina, Juha Lahtinen
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Patent number: 7022056Abstract: A method for fitting a tubular roll shell (2) of a roll (1) in a paper or board machine. In the method, the roll shell (2) is supported on a stationary roll shaft (3) by means of hydrostatic slide bearing elements (4a, 4b; 4a?, 4b?; 5a, 5b; 5a?, 5b?), acting on the roll shell (2) in radially opposite directions, at least in the direction of a plane co-directional with a first plane or a plane parallel to a primary loading (F) and in a plane substantially lateral to a plane co-directional with the primary loading (F). The slide bearing elements (4a, 4b, 4a?, 4b?, 5a, 5b, 5a?, 5b?) are loaded hydraulically by means of a pressure fluid.Type: GrantFiled: May 31, 2001Date of Patent: April 4, 2006Assignee: Metso Paper, Inc.Inventors: Kari Holopainen, Jori Onnela, Juha Lahtinen, Ari Lehto
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Patent number: 6699164Abstract: The invention relates to a method for providing a roll (1) for a paper machine with sliding bearings, the roll comprising a stationary roll axle (3) and a tubular roll mantle (2) arranged to revolve around it. In the method, the roll mantle (2) is supported on the roll axle (3) by means of hydraulic sliding bearing members (4a, 4b, 5a, 5b; 25, 28; 40a, 40b) which are arranged to accomplish radial fitting with bearings of the roll mantle in the loading direction and in the lateral direction with respect to it, and the axial fitting with bearings of the roll mantle. The sliding bearing members are loaded by means of a hydraulic medium, the feed of which to the sliding bearing members is controlled by means of control valves (6; 30; 40).Type: GrantFiled: January 29, 2002Date of Patent: March 2, 2004Assignee: Metso Paper, Inc.Inventors: Juha Lahtinen, Ari Lehto, Jori Onnela, Esa Lensu, Pekka Kivioja, Aki Mikkola
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Patent number: 6595691Abstract: The invention relates to an arrangement for displacing a roll, which is hydrostatically journalled by its axle (1) on support structures and positionable in its working position by means of a bearing, through a rapid movement of the bearing out of its said working position. The journalling comprises at each end of the roll at least one loading element (2-4) pressurizable with a hydraulic medium and at least one support element (5). The arrangement of the invention comprises a valve control piston (9), delivering a hydraulic medium required for the pressurization of said at least one loading element (2) and positioned in a valve cylinder (8), said control piston (9) being provided with a positioning valve (10) on the face of the control piston (9) pointing towards the loading element (2), the face of the control piston (9) opposite relative to the positioning valve (10) being coupled with a pressure line (LP) of the hydraulic system for focusing a holding pressure on the control piston (9).Type: GrantFiled: March 26, 2001Date of Patent: July 22, 2003Assignee: Metso Paper, Inc.Inventors: Kari Holopainen, Juha Lahtinen, Pekka Kivioja, Juha Ehrola
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Patent number: 6471006Abstract: Oil is pumped from a tank (10) to points of service in the hydraulic roll control system of a papermaking machine, wherein the oil is pumped at least at one low pressure level such as is required for the lubrication of the roll bearings and/or drive gearbox and at least at one high pressure level such as is required for the pressure-loaded zones of a roll. The oil is filtered and if necessary cooled and the return circulation of oil is passed back to the tank (10). The oil is pumped from the tank (10) into a single low-pressure circuit by a pump or pumps (11a, 11b), with a capacity to meet overall demand of fluid flows delivered to the points of service. Supply lines form the circuit to desired points of service are passed through stages to stepwise elevate the line pressure to a desired high-pressure level.Type: GrantFiled: September 25, 2001Date of Patent: October 29, 2002Assignee: Metso Paper, Inc.Inventors: Matti Hulkkonen, Juha Lahtinen, Esa Salavamäki
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Publication number: 20020046905Abstract: Oil is pumped from a tank (10) to points of service in the hydraulic roll control system of a papermaking machine, wherein the oil is pumped at least at one low pressure level such as is required for the lubrication of the roll bearings and/or drive gearbox and at least at one high pressure level such as is required for the pressure-loaded zones of a roll. The oil is filtered and if necessary cooled and the return circulation of oil is passed back to the tank (10). The oil is pumped from the tank (10) into a single low-pressure circuit by a pump or pumps (11a, 11b), with a capacity to meet overall demand of fluid flows delivered to the points of service. Supply lines form the circuit to desired points of service are passed through stages to stepwise elevate the line pressure to a desired high-pressure level.Type: ApplicationFiled: September 25, 2001Publication date: April 25, 2002Inventors: Matti Hulkkonen, Juha Lahtinen, Esa Salavamaki
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Publication number: 20020010062Abstract: A method for fitting a tubular roll shell (2) of a roll (1) in a paper or board machine. In the method, the roll shell (2) is supported on a stationary roll shaft (3) by means of hydrostatic slide bearing elements (4a, 4b; 4a′, 4b′; 5a, 5b; 5a′, 5b′), acting on the roll shell (2) in radially opposite directions, at least in the direction of a plane co-directional with a first plane or a plane parallel to a primary loading (F) and in a plane substantially lateral to a plane co-directional with the primary loading (F). The slide bearing elements (4a, 4b, 4a′, 4b′, 5a, 5b, 5a′, 5b′) are loaded hydraulically by means of a pressure fluid.Type: ApplicationFiled: May 31, 2001Publication date: January 24, 2002Inventors: Kari Holopainen, Jori Onnela, Juha Lahtinen, Ari Lehto
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Patent number: 6109285Abstract: Method and arrangement for automatic monitoring and correction of the regulation pressure of regulation valves in a regulation valve block in a variable-crown roll in a paper machine. The regulation pressure of the regulation valve in each regulation zone in the regulation valve block can be connected alternatingly to a reference pressure detector whose measurement signal is compared with the measurement signal of the actual value of the regulation pressure in the regulation zone concerned. The result of the comparison is stored on the page of monitoring of pressure detectors contained in the central computer system, on which page, in addition to this difference, set values and actual values of the regulation zone pressures as well as the value of the reference measurement are provided.Type: GrantFiled: December 17, 1998Date of Patent: August 29, 2000Assignee: Valmet CorporationInventors: Pekka Kivioja, Juha Lahtinen
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Patent number: 6012386Abstract: A bearing control system for a roll with hydrostatic bearings which is mounted by its axle on a bearing block or other equivalent frame member by hydraulically loaded hydrostatic bearing elements. A principal bearing element acts in a principal loading direction and another bearing element is a backup bearing element which acts in a direction opposite to the principal loading direction. The bearing elements include bearing shoes positioned freely around the axle in order to support the axle so that the roll revolves freely in relation to the bearing block or other frame member. The control system feeds a hydraulic pressure medium to the hydrostatic bearing elements so that the roll is displaceable in the principal loading direction, e.g., in the direction of the nip plane, by displacing the axle via the bearing elements.Type: GrantFiled: October 14, 1998Date of Patent: January 11, 2000Assignee: Valmet CorporationInventors: Juha Lahtinen, Pekka Kivioja, Vesa Nokelainen, Kari Holopainen, Juha Ehrola
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Patent number: 5566451Abstract: A method for providing a tubular roll mantle of a roll for a paper machine or equivalent with glide bearings and a roll including glide-bearings. The roll mantle is supported on a stationary roll axle by hydraulic glide-bearing members acting upon the roll mantle or upon the roll ends. The bearing members are loaded hydraulically by a pressure medium. The roll mantle is supported on the roll axle by at least one pair of glide-bearing members which acting radially and/or axially in opposite directions. When an outside force that shifts or attempts to shift the roll mantle in the direction transverse to the main loading direction and/or in the axial direction is applied to the roll mantle, the pressure in the glide-bearing member placed at the side of the higher loading is adjusted to a level higher than the pressure in the glide-bearing member acting in the opposite direction so that the outside forces are neutralized.Type: GrantFiled: May 9, 1995Date of Patent: October 22, 1996Assignee: Valmet CorporationInventors: Juhani Niskanen, Pekka Kivioja, Juha Lahtinen, Esa Lensu, Esa Salavamaki
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Patent number: 5509883Abstract: A method for providing a tubular roll mantle of a roll for a paper machine or equivalent with glide bearings and a roll including glide-bearings. The roll mantle is supported on a stationary roll axle by hydraulic glide-bearing members acting upon the roll mantle or upon the roll ends. The bearing members are loaded hydraulically by a pressure medium. The roll mantle is supported on the roll axle by at least one pair of glide-bearing members which acting radially and/or axially in opposite directions. When an outside force that shifts or attempts to shift the roll mantle in the direction transverse to the main loading direction and/or in the axial direction is applied to the roll mantle, the pressure in the glide-bearing member placed at the side of the higher loading is adjusted to a level higher than the pressure in the glide-bearing member acting in the opposite direction so that the outside forces are neutralized.Type: GrantFiled: May 2, 1994Date of Patent: April 23, 1996Assignee: Valmet Paper Machinery, Inc.Inventors: Juhani Niskanen, Pekka Kivioja, Juha Lahtinen, Esa Lensu, Esa Salvamaki