Patents by Inventor Ulf Engstrom
Ulf Engstrom 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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Publication number: 20230250519Abstract: A diffusion-bonded powder having an iron powder having 1-5%, preferably 1.5-4% and most preferably 1.5-3.5% by weight of copper particles diffusion bonded to the surfaces of the iron powder particles. The diffusion bonded powder is suitable for producing components having high sintered density and minimum variation in copper content. The iron powder may be produced by providing an atomized iron powder with an oxygen content of 0.3-1.2% by weight and with a carbon content of 0.1-0.5% by weight, and subjecting the atomized iron powder and a copper containing powder to a reduction annealing process in a reducing atmosphere to obtain the iron based powder.Type: ApplicationFiled: April 14, 2023Publication date: August 10, 2023Applicant: HÖGANÄS AB (PUBL)Inventors: Caroline Larsson, Ulf Engström, Christophe Szabo
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Patent number: 11685979Abstract: Disclosed is a new diffusion-bonded powder consisting of an iron powder having 1-5%, preferably 1.5-4% and most preferably 1.5-3.5% by weight of copper particles diffusion bonded to the surfaces of the iron powder particles. The new diffusion bonded powder is suitable for producing components having high sintered density and minimum variation in copper content.Type: GrantFiled: March 15, 2017Date of Patent: June 27, 2023Assignee: HÖGANÄS AB (PUBL)Inventors: Caroline Larsson, Ulf Engström, Christophe Szabo
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Publication number: 20210046543Abstract: Disclosed is a new diffusion-bonded powder consisting of an iron powder having 1-5%, preferably 1.5-4% and most preferabiy 1.5-3.5% by weight of copper particles diffusion bonded to the surfaces of the iron powder particles. The new diffusion bonded powder is suitable for producing components having high sintered density and minimum variation in copper content.Type: ApplicationFiled: March 15, 2017Publication date: February 18, 2021Applicant: HÖGANÄS AB (PUBL)Inventors: Caroline Larsson, Ulf Engström, Christophe Szabo
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Publication number: 20160114392Abstract: A water-atomized iron-based powder is provided that is pre-alloyed with 0.75-1.1% by weight of Ni, 0.75-1.1% by weight of Mo and up to 0.45% by weight of Mn, and further including 0.5-3.0%, preferably 0.5-2.5% and most preferably 0.5-2.0% by weight of Cu, and inevitable impurities, the balance being Fe.Type: ApplicationFiled: January 4, 2016Publication date: April 28, 2016Applicant: HÖGANÄS AB (PUBL)Inventors: Sigurd BERG, Ulf ENGSTRÖM, Caroline LARSSON
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Publication number: 20130136646Abstract: The present invention concerns a method of producing sintered components, and sintered components by the method. The method provides a cost effective production of sintered steel parts with wear resistance properties comparable to those of components made from chilled cast iron.Type: ApplicationFiled: May 24, 2011Publication date: May 30, 2013Applicant: HOGANAS AB (PUBL)Inventors: Sigurd Berg, Senad Dizdar, Ulf Engstrom, Ola Litstrom, Eckart Schneider
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Publication number: 20100154588Abstract: A water-atomized iron-based powder is provided that is pre-alloyed with 0.75-1.1% by weight of Ni, 0.75-1.1% by weight of Mo and up to 0.45% by weight of Mn, and further including 0.5-3.0%, preferably 0.5-2.5% and most preferably 0.5-2.0% by weight of Cu, and inevitable impurities, the balance being Fe.Type: ApplicationFiled: June 12, 2008Publication date: June 24, 2010Inventors: Sigurd Berg, Ulf Engström, Caroline Larsson
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Patent number: 7341689Abstract: The invention concerns a new pre alloyed steel powder comprising in addition to iron and inevitable impurities, by wt %, 1.3-1.7% by weight of Cr, 0.15-0.3% by weight of Mo, 0.09-0.3% by weight of Mn, not larger than 0.01 by weight of C, not larger than 0.25% of O.Type: GrantFiled: December 27, 2005Date of Patent: March 11, 2008Assignee: Höganäs ABInventors: Ulf Engström, Sigurd Berg
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Publication number: 20060099105Abstract: The invention concerns a new pre alloyed steel powder comprising in addition to iron and inevitable impurities, by wt %, 1.3-1.7% by weight of Cr, 0.15-0.3% by weight of Mo, 0.09-0.3% by weight of Mn, not larger than 0.01 by weight of C, not larger than 0.25% of O.Type: ApplicationFiled: December 27, 2005Publication date: May 11, 2006Applicant: Hoganas ABInventors: Ulf Engstrom, Sigurd Berg
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Publication number: 20030233911Abstract: The invention concerns a new pre alloyed steel powder comprising in addition to iron and inevitable impurities, by wt %, 1.3-1.7% by weight of Cr, 0.15-0.3% by weight of Mo, 0.09-0.3% by weight of Mn, not larger than 0.01 by weight of C, not larger than 0.25% of O.Type: ApplicationFiled: August 1, 2002Publication date: December 25, 2003Inventors: Ulf Engstrom, Sigurd Berg
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Patent number: 6485677Abstract: This invention relates to a metal powder composition for warm compaction. According to the invention, the invention comprises metal powder, graphite, optional binding agent, optional alloying elements and a lubricant essentially consisting of ethylene-bis-stearamide, whereby the mixture before warm compaction has been subjected to treatment with an organic solvent. The invention further relates to a method for making sintered products, whereby an organic solvent is added during the mixing of the metal powder composition and is evaporated before warm compaction.Type: GrantFiled: December 16, 1999Date of Patent: November 26, 2002Assignee: Höganäs ABInventors: Björn Johansson, Ulf Engström
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Patent number: 5926686Abstract: The present invention concerns low allow PM materials which after single pressing and sintering utilizing traditional powder metallurgy processes and equipment combine high mechanical strength and high density with maintained precision of tolerance. As base material is used an iron powder having at least one alloying element diffusion-bonded to the outer surfaces of unalloyed iron particle is provided.Type: GrantFiled: November 13, 1997Date of Patent: July 20, 1999Assignee: Hoganas ABInventors: Ulf Engstrom, Bjorn Johansson
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Patent number: 4964909Abstract: A heat-insulating component consists of a porous body obtained by moulding and sintering an iron-base powder having an admixture of 2-10% by weight of silicon, preferably 4-8% by weight. A method of making the heat-insulating component includes the steps of preparing an iron-base powder mixture with an admixture of 2-10% by weight of silicon, preferably 4-8% by weight; optionally supplying the powder with further admixtures in the form of 3-12% by weight of maganese, preferably 5-10% by weight, up to 25% by weight of chromium, up to 15% by weight of nickel, up to 2.5 % by weight of molybdenum and up to 2% by weight of carbon, moulding the powder mixture into a body of desired shape, and sintering the body for obtaining a porous component having a coefficient of thermal conductivity below about 12 W/m.degree.K, preferably below 7 W/m.degree.K.Type: GrantFiled: January 4, 1989Date of Patent: October 23, 1990Assignee: Hoganas ABInventors: Ulf Engstrom, Olavi Mustonen
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Patent number: 4751164Abstract: A novel carrier material useful in conjunction with a toner for preparing a two-component developer for electrophotographic processes is provided. The carrier comprises a spherical magnetite particulate material having a reduced metallic iron outer layer which is coated with an outermost resinous layer for conditioning the copying properties of the carrier.Type: GrantFiled: May 13, 1987Date of Patent: June 14, 1988Assignees: Kanto Denka Kogyo Co., Ltd., Hoganas ABInventors: Mitsuhiro Katayama, Kenkichi Hara, Kazuyoshi Oka, Ulf Engstrom, Svenn E. Larssen
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Patent number: 4732835Abstract: A novel carrier material useful in conjunction with a toner for preparing a two-component developer for electrophotographic processes is provided. The carrier comprises a spherical magnetite particulate material having a reduced metallic iron outer layer which is coated with an outermost resinous layer for conditioning the copying properties of the carrier.Type: GrantFiled: June 9, 1986Date of Patent: March 22, 1988Assignees: Kanto Denka Kogyo Co., Ltd., Hoganas ABInventors: Mitsuhiro Katayama, Kenkichi Hara, Kazuyoshi Oka, Ulf Engstrom, Svenn E. Larrssen
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Patent number: 4663262Abstract: A noval carrier powder for electrophotographic developers is provided. The carrier powder comprises spherical magnetite particles having a wustite (FeO) content of less than 10% by weight, a particle diameter of 30-200 .mu.m and a surface porosity of less than 20%.Type: GrantFiled: December 26, 1985Date of Patent: May 5, 1987Assignees: Kanto Denka Kogyo Co., Ltd., Hoganas ABInventors: Kazuyoshi Oka, Mitsuhiro Katayama, Toshihiko Kohno, Ulf Engstrom, Svenn-Erik Larssen