Patents by Inventor Rolf Hindstrom
Rolf Hindstrom 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: 10814282Abstract: A filter element for a filter apparatus includes at least one filter member and a frame member arranged to support the at least one filter member in such a manner that an internal cavity is formed. The filter member includes a permeable membrane layer which has a first filter surface for receiving a pressure and directed towards an internal cavity arranged in-side the filter element, and a second filter surface for receiving solid particles filtered from a feed. The filter member forms a capillary filter.Type: GrantFiled: November 3, 2015Date of Patent: October 27, 2020Assignee: OUTOTEC (FINLAND) OYInventors: Kari Vänttinen, Ismo Juvonen, Rolf Hindström, Bjarne Ekberg, Mika Illi, Edward Vroman, Laura Simola, Olli Högnabba
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Publication number: 20180326357Abstract: A filter element for a filter apparatus includes at least one filter member and a frame member arranged to support the at least one filter member in such a manner that an internal cavity is formed. The filter member includes a permeable membrane layer which has a first filter surface for receiving a pressure and directed towards an internal cavity arranged in-side the filter element, and a second filter surface for receiving solid particles filtered from a feed. The filter member forms a capillary filter.Type: ApplicationFiled: November 3, 2015Publication date: November 15, 2018Inventors: Kari VÄNTTINEN, Ismo JUVONEN, Rolf HINDSTRÖM, Bjarne EKBERG, Mika ILLI, Edward VROMAN, Laura SIMOLA, Olli HÖGNABBA
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Publication number: 20150343347Abstract: A connector (19) for a filter plate comprises an elbow fitting (20) connectable onto a first plane surface of a filter plate, a counterpart connectable onto a second plane surface of the filter plate, and a bolt (22) for fastening the elbow fitting (20) to the counterpart (21). The elbow fitting (20) comprises an inlet (24) connectable to an internal cavity of the filter plate and an outlet (25) connectable to a drainage line of a disc filter so that the elbow fitting (20) is able to act as a fluid communication channel between the internal cavity and the drainage line.Type: ApplicationFiled: January 9, 2014Publication date: December 3, 2015Applicant: Outotec (Finland) OyInventor: Rolf HINDSTRÖM
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Patent number: 6419835Abstract: The invention relates to a method for producing a solids cake created in filtering performed by a suction drier provided with a fine porous liquid suction surface, in which method there is created, in order to produce said solids cake, a pressure difference in between the filter surface of the fine porous filter medium and the surface opposite to said filter surface. According to the invention, in connection with the filter cake formation, the pressure difference between the filter surface of the fine porous filter medium and the surface opposite to said filter surface is controlled in order to adjust the cake formation speed, and the slurry surface of the suction drier filtering tank is advantageously maintained on a level that enables the use of at least one filter surface cleaning member, essentially throughout the whole filter cake formation process.Type: GrantFiled: June 15, 1999Date of Patent: July 16, 2002Assignee: Outokumpu OyjInventors: Matti Virtanen, Rolf Hindström
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Patent number: 5039347Abstract: The invention relates to a method for cleaning the filter plates of a suction drier, which suction drier (20) comprises a tank (13) for the slurry to be suction dried, in connection to which tank there rotates one or several filter disks formed of the said filter plates (14), on the surface or surfaces of which filter plates (14) there is collected and dried, owing to the suction flow passing through the filter plates (14), a filter cake, which is scraped or otherwise removed from the surface or surfaces of the filter plates. For the cleaning of the porous structure and surfaces of the said filter plates (14), there is arranged, in the tank (13) of the slurry to be filtered, under the liquid surface (11), mainly in the surface water area, an ultrasonic vibrator or vibrators (10), whereto ultrasonic electric power is fed from an ultrasonic generator (22). The cleaning with the ultrasonic vibrator or vibrators (10) is carried out esentially immediately after scraping.Type: GrantFiled: June 20, 1990Date of Patent: August 13, 1991Assignee: Outokumpu OyInventors: Rolf Hindstrom, Jorma Punju
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Patent number: 4981589Abstract: The invention concerns a filter construction in particular for suction driers. The filter construction comprises a first filter material layer (1) of a ceramic material, which is the first layer in relation to the flowing liquid, and a second filter material layer (2) of a ceramic material, connected with said first layer. The first filter material layer (1) acts as the filtering layer proper, and the second filter material layer (2) acts as a layer that supports the construction. The invention also concerns a method for the formation of the filter construction.Type: GrantFiled: October 28, 1988Date of Patent: January 1, 1991Assignee: Valmet Paper Machinery Inc.Inventors: Rolf Hindstrom, Paivi Peltonen
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Patent number: 4956088Abstract: A filtering method in which an object to be filtered and dewatered is brought through a finely porous suction face saturated with liquid, into hydraulic connection with a liquid situated under a negative pressure relative to the object to be dewatered. The filter plate or equivalent and the material to be filtered which adheres to the plate by the liquid suction, are surrounded by a pressure-tight cover. A positive pressure relative to atmospheric pressure is introduced into this cover, by which removal of liquid out of the material to be filtered is intensified. A device for providing such filtration is also provided.Type: GrantFiled: May 8, 1989Date of Patent: September 11, 1990Assignee: Outokumpu OyInventor: Rolf Hindstrom
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Patent number: 4863656Abstract: A method for manufacturing a microporous plate, a filter plate obtained from the method, and suction drier apparatus utilizing such filter plates. According to the method, a casting mix is introduced into the interior of a gypsum mold whereupon water is absorbed from the casting mix into the gypsum so that a crust remains on the inner surface of the mold. The crust is allowed to develop to an appropriate thickness whereupon the remaining casting mix is drained from the mold. The inner surfaces of the crust are allowed to dry whereupon the interior space defined between opposed crust wall portions is filled with a granular material which preferably has the same composition as the crust material. A filter plate comprises a pair of opposed suction walls defining an interior space between them which is filled with a granular material. The suction drier apparatus includes at least one of the filter plates which is mounted to be moved into and out of a basin or the like in which material to be dewatered is present.Type: GrantFiled: June 10, 1988Date of Patent: September 5, 1989Assignee: Valmet OyInventor: Rolf Hindstrom
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Patent number: 4856204Abstract: A method for manufacturing a microporous plate, a filter plate obtained from the method, and suction drier apparatus utilizing such filter plates are disclosed. According to the method, a casting mix is introduced into the interior of a gypsum mold whereupon water is absorbed from the casting mix into the gypsum so that a crust remains on the inner surface of the mold. The crust is allowed to develop to an appropriate thickness whereupon the remaining casting mix is drained from the mold. The inner surfaces of the crust are allowed to dry whereupon the interior space defined between opposed crust wall portions is filled with a granular material which preferably has the same composition as the crust material. A filter plate comprises a pair of opposed suction walls defining an interior space between them which is filled with a granular material.Type: GrantFiled: December 3, 1986Date of Patent: August 15, 1989Assignee: Valmet OyInventor: Rolf Hindstrom