Patents by Inventor Hilmar Vidarsson
Hilmar Vidarsson 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).
-
Patent number: 7682558Abstract: A metallurgical composition is provided for making compacted parts, comprising: (a) at least about 80 percent by weight of an iron or iron-based powder; (b) up to about 20 percent by weight of at least one alloying powder; (c) from about 0.05 to about 2 percent by weight of a binding agent comprising a C14-C30 fatty alcohol; and (d) from about 0.001 to about 0.2 percent by weight of a flow agent.Type: GrantFiled: December 20, 2006Date of Patent: March 23, 2010Assignee: Höganäs AB (PUBL)Inventors: Per Knutsson, Per-Olof Larsson, Hilmar Vidarsson
-
Patent number: 7662209Abstract: The invention concerns a powder composition including an iron or iron based powder and a lubricating amount of an alkylalkoxy or polyetheralkoxy silane, wherein the alkyl or polyether group has between 8 and 30 carbon atoms and the alkoxy group includes 1-3 carbon atoms.Type: GrantFiled: June 4, 2007Date of Patent: February 16, 2010Assignee: Höganäs ABInventors: Mikhail Kejzelman, Paul Skoglund, Hilmar Vidarsson, Per Knutsson
-
Patent number: 7585459Abstract: The present invention concerns a process for the preparation of high density green compacts comprising the steps of providing an iron-based powder essentially free from fine particles; optionally mixing said powder with graphite and other additives; uniaxially compacting the powder in a die at a compaction pressure of at least about 800 MPa and ejecting the green body. The invention also concerns the powder used in the method.Type: GrantFiled: October 22, 2003Date of Patent: September 8, 2009Assignee: Höganäs ABInventors: Mikhail Kejzelman, Paul Skoglund, Hilmar Vidarsson
-
Publication number: 20080302209Abstract: A metallurgical composition is provided for making compacted parts, comprising: (a) at least about 80 percent by weight of an iron or iron-based powder; (b) up to about 20 percent by weight of at least one alloying powder; (c) from about 0.05 to about 2 percent by weight of a binding agent comprising a C14-C30 fatty alcohol; and (d) from about 0.001 to about 0.2 percent by weight of a flow agent.Type: ApplicationFiled: December 20, 2006Publication date: December 11, 2008Applicant: HOGANAS AB (PUBL)Inventors: Per Knutsson, Per-Olof Larsson, Hilmar Vidarsson
-
Publication number: 20080134835Abstract: A powder metallurgical composition for making compacted parts is provided. Such composition comprises iron or an iron based powder, and a binder comprising a drying oil and a drying agent. In a preferred embodiment graphite also is present.Type: ApplicationFiled: January 27, 2006Publication date: June 12, 2008Applicant: HOGANAS ABInventors: Bjorn Johansson, Hilmar Vidarsson
-
Publication number: 20080060477Abstract: The present invention concerns a process for the preparation of high density green compacts comprising the steps of providing an iron-based powder essentially free from fine particles; optionally mixing said powder with graphite and other additives; uniaxially compacting the powder in a die at a compaction pressure of at least about 800 MPa and ejecting the green body. The invention also concerns the powder used in the method.Type: ApplicationFiled: October 31, 2007Publication date: March 13, 2008Applicant: HOGANAS ABInventors: Mikhail Kejzelman, Paul Skoglund, Hilmar Vidarsson
-
Publication number: 20080019859Abstract: The invention concerns a powder metallurgical composition containing, preferably a coarse, soft magnetic iron or iron-based powder, wherein the particles are surrounded by an insulating inorganic coating and as lubricant at least one non-drying oil or liquid having a crystalline melting point below 25° C., a viscosity (?) at 40° C. above 15 mPas and wherein said viscosity is temperature dependent according to the following formula: 10 log ?=k/T+C wherein the slope k is above 800 T is in Kelvin and C is a constant in an amount between 0.05 and 0.4% by weight of the composition.Type: ApplicationFiled: June 21, 2005Publication date: January 24, 2008Inventors: Hilmar Vidarsson, Paul Skoglund, Bjorn Skarman
-
Publication number: 20070234850Abstract: The invention concerns a powder composition including an iron or iron based powder and a lubricating amount of an alkylalkoxy or polyetheralkoxy silane, wherein the alkyl or polyether group has between 8 and 30 carbon atoms and the alkoxy group includes 1-3 carbon atoms.Type: ApplicationFiled: June 4, 2007Publication date: October 11, 2007Applicant: HOGANAS ABInventors: Mikhail Kejzelman, Paul Skoglund, Hilmar Vidarsson, Per Knutsson
-
Patent number: 7255724Abstract: The invention concerns an improved segregation-resistant and dust-resistant metallurgical composition for making compacted parts, comprising at least about 80 percent by weight of an iron or iron-based powder; at least one alloying powder; and (c) about 0.05 to about 2 percent by weight of a binding/lubricating combination of polyethylene wax and ethylene bis-stearamide, the polyethylene wax having a weight average molecular weight below about 1000 and a melting point below that of ethylene bis-stearamide, and being present in amount between 10 and 90% by weight of the binding/lubricating combination.Type: GrantFiled: December 16, 2004Date of Patent: August 14, 2007Assignee: Höganäs ABInventors: Mats Larsson, Åsa Ahlin, Maria Ramstedt, Hilmar Vidarsson
-
Patent number: 7238220Abstract: The invention concerns a powder composition including an iron or iron based powder and a lubricating amount of an alkylalkoxy or polyetheralkoxy silane, wherein the alkyl or polyether group has between 8 and 30 carbon atoms and the alkoxi group includes 1-3 carbon atoms.Type: GrantFiled: October 22, 2003Date of Patent: July 3, 2007Assignee: Höganäs ABInventors: Mikhail Kejzelman, Paul Skoglund, Hilmar Vidarsson, Per Knutsson
-
Patent number: 7153594Abstract: The present invention concerns a new ferromagnetic powder composition comprising soft magnetic iron-based core particles wherein the surface of the core particles are surrounded by an insulating inorganic coating, and a lubricating amount of a compound selected from the group consisting of silanes, titanates, aluminates, zirconates, or mixtures thereof. The invention also concerns a process for the preparation of soft magnetic composite materials using the new powder composition.Type: GrantFiled: December 23, 2003Date of Patent: December 26, 2006Assignee: Höganäs ABInventors: Mikhail Kejzelman, Paul Skoglund, Ola Andersson, Per Knutsson, Hilmar Vidarsson, Björn Skårman
-
Publication number: 20050139039Abstract: The invention concerns an improved segregation-resistant and dust-resistant metallurgical composition for making compacted parts, comprising at least about 80 percent by weight of an iron or iron-based powder; at least one alloying powder; and (c) about 0.05 to about 2 percent by weight of a binding/lubricating combination of polyethylene wax and ethylene bis-stearamide, the polyethylene wax having a weight average molecular weight below about 1000 and a melting point below that of ethylene bis-stearamide, and being present in amount between 10 and 90% by weight of the binding/lubricating combination.Type: ApplicationFiled: December 16, 2004Publication date: June 30, 2005Applicant: HOGANAS ABInventors: Mats Larsson, Asa Ahlin, Maria Ramstedt, Hilmar Vidarsson
-
Publication number: 20040191519Abstract: The present invention concerns a new ferromagnetic powder composition comprising soft magnetic iron-based core particles wherein the surface of the core particles are surrounded by an insulating inorganic coating, and a lubricating amount of a compound selected from the group consisting of silanes, titanates, aluminates, zirconates, or mixtures thereof. The invention also concerns a process for the preparation of soft magnetic composite materials using the new powder composition.Type: ApplicationFiled: December 23, 2003Publication date: September 30, 2004Applicant: HOGANAS ABInventors: Mikhail Kejzelman, Paul Skoglund, Ola Andersson, Per Knutsson, Hilmar Vidarsson, Bjorn Skarman
-
Publication number: 20040123697Abstract: The present invention concerns a process for the preparation of high density green compacts comprising the steps of providing an iron-based powder essentially free from fine particles; optionally mixing said powder with graphite and other additives; uniaxially compacting the powder in a die at a compaction pressure of at least about 800 MPa and ejecting the green body. The invention also concerns the powder used in the method.Type: ApplicationFiled: October 22, 2003Publication date: July 1, 2004Inventors: Mikhail Kejzelman, Paul Skoglund, Hilmar Vidarsson
-
Publication number: 20040123696Abstract: The invention concerns a powder composition including an iron or iron based powder and a lubricating amount of an alkylalkoxy or polyetheralkoxy silane, wherein the alkyl or polyether group has between 8 and 30 carbon atoms and the alkoxi group includes 1-3 carbon atoms.Type: ApplicationFiled: October 22, 2003Publication date: July 1, 2004Inventors: Mikhail Kejzelman, Paul Skoglund, Hilmar Vidarsson, Per Knutsson
-
Patent number: 6755885Abstract: A powder composition for warm compaction comprising an iron-based powder and a lubricant powder consisting essentially of an amide described by the following formula D—Cm—B—A—B—Cm—D wherein D is —H, COR, CNHR, wherein R is a straight or branched aliphatic or aromatic group including 2-21 C atoms; C is the group —NH (CH)n CO—; B is amino or carbonyl; A is alkylene having 4-16 C atoms optionally including up to 4 O atoms m is an integer 1-10 and n is an integer 5-11.Type: GrantFiled: July 25, 2002Date of Patent: June 29, 2004Assignee: Hëganäs ABInventors: Hilmar Vidarsson, Per Knutsson
-
Patent number: 6733260Abstract: A powder box, an arrangement for a powder box comprising an insert and a method for filling powder into a cavity formed in a die. Gas is supplied to a powder box, which is movable toward and away from a position just above the cavity. The gas is supplied through a permeable plate, which is arranged on at least one insert and which faces the interior of the powder box, so that particles of the powder in the powder box are movable relative to each other. The fluidisation of the powder shortens the filling time and results in an even particle size distribution in the cavity.Type: GrantFiled: October 8, 2002Date of Patent: May 11, 2004Assignee: Höganäs ABInventors: Paul Skoglund, Sven Allroth, Hilmar Vidarsson
-
Patent number: 6605251Abstract: This invention relates to a lubricant for metallurgical powder compositions. According to the invention, the lubricant contains a polyolefine-based polymer, which has a weight-average molecular weight Mw of 500-10000. The invention further concerns a metal-powder composition containing the lubricant, method for making sintered products by using the lubricant, and use of the same in cold and warm compaction.Type: GrantFiled: February 24, 2000Date of Patent: August 12, 2003Assignee: Höganäs ABInventor: Hilmar Vidarsson
-
Publication number: 20030113222Abstract: A powder box, an arrangement for a powder box comprising an insert and a method for filling powder into a cavity formed in a die. Gas is supplied to a powder box, which is movable toward and away from a position just above the cavity. The gas is supplied through a permeable plate, which is arranged on at least one insert and which faces the interior of the powder box, so that particles of the powder in the powder box are movable relative to each other. The fluidisation of the powder shortens the filling time and results in an even particle size distribution in the cavity.Type: ApplicationFiled: October 8, 2002Publication date: June 19, 2003Inventors: Paul Skoglund, Sven Allroth, Hilmar Vidarsson
-
Patent number: 6573225Abstract: The invention concerns a metal powder composition for warm compaction comprising an iron-based powder and lubricant powder consisting of a polycarboxylic acid amide wax having a melting point peak in the range of 180° to 210° C.Type: GrantFiled: February 19, 2002Date of Patent: June 3, 2003Assignee: Höganäs ABInventors: Hilmar Vidarsson, Sigurd Berg