Patents by Inventor Per Sjödin
Per Sjödin 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: 9694434Abstract: Disclosed is a method for producing a permanently joined plate heat exchanger comprising a plurality of metal heat exchanger plates having a solidus temperature above 1100° C., provided beside each other and forming a plate package with first plate interspaces for a first medium and second plate interspaces for a second medium, wherein the first and second plate interspaces are provided in an alternating order in the plate package, wherein each heat exchanger plate comprises a heat transfer area and an edge area comprising bent edges which extend around the heat transfer area, wherein a first surface of the plates forms a convex shape and a second surface of the plates forms a concave shape, wherein the heat transfer area comprises a corrugation of elevations and depressions, wherein said corrugation of the plates and the bent edges are provided by pressing the plates. Also disclosed is a plate heat exchanger produced by the method.Type: GrantFiled: March 27, 2013Date of Patent: July 4, 2017Assignee: ALFA LAVAL CORPORATE ABInventors: Per Sjödin, Kristian Walter
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Patent number: 9694435Abstract: Disclosed is a method for producing a permanently joined plate heat exchanger comprising a plurality of metal heat exchanger plates having a solidus temperature above 1100° C., provided beside each other and forming a plate package with first plate interspaces for a first medium and second plate interspaces for a second medium, wherein the first and second plate interspaces are provided in an alternating order in the plate package. Each heat exchanger plate comprises a heat transfer area and an edge area which extend around the heat transfer area. The heat transfer area comprises a corrugation of elevations and depressions, wherein said corrugation of the plates are provided by pressing the plates. Also disclosed is a plate heat exchanger produced by the method.Type: GrantFiled: March 28, 2013Date of Patent: July 4, 2017Assignee: ALFA LAVAL CORPORATE ABInventors: Per Sjödin, Kristian Walter
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Publication number: 20160202005Abstract: The invention relates to a method for producing a permanently joined plate heat exchanger comprising a plurality of metal heat exchanger plates having a solidus temperature above 1000° C., provided beside each other and forming a plate package with first plate interspaces for a first medium and second plate interspaces for a second medium, wherein the first and second plate interspaces are provided in an alternating order in the plate package, wherein each heat exchanger plate comprises a heat transfer area and an edge area comprising bent edges which extend around the heat transfer area, wherein a first surface of the plates forms a convex shape and a second surface of the plates forms a concave shape, wherein the heat transfer area comprises a corrugation of elevations and depressions, wherein said corrugation of the plates and the bent edges are provided by pressing the plates. The invention also relates to a plate heat exchanger produced by the method.Type: ApplicationFiled: September 10, 2014Publication date: July 14, 2016Applicant: ALFA LAVAL CORPORATE ABInventors: Per SJÖDIN, Kristian WALTER
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Publication number: 20160199931Abstract: A method for joining a first metal part with a second metal part, the metal parts having a solidus temperature above 1000° C. The method includes applying a melting depressant composition on a surface of the first metal part, the melting depressant composition including a melting depressant component that includes phosphorus and silicon for decreasing a melting temperature of the first metal part; bringing the second metal part into contact with the melting depressant composition at a contact point on said surface; heating the first and second metal parts to a temperature above 1000° C.; and allowing a melted metal layer of the first metal component to solidify, such that a joint is obtained at the contact point. The melting depressant composition and related products are also described.Type: ApplicationFiled: September 10, 2014Publication date: July 14, 2016Applicant: ALFA LAVAL CORPORATE ABInventors: Per Sjödin, Kristian Walter
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Publication number: 20160184935Abstract: Disclosed is a brazing material comprising an alloy containing essentially: (i) 15 to 30 wt % chromium (Cr); 0.1 to 5.0 wt % manganese (Mn); 9 to 20 wt % nickel (Ni); 0 to 4.0 wt % molybdenum (Mo); 0 to 1.0 wt % nitrogen (N); 1.0 to 7.0 wt % silicon (Si); 0 to 0.2 wt % boron (B); 1.0 to 7.0 wt % phosphorous (P); optionally 0.0 to 2.5 wt % of each of one or more of elements selected from the group consisting of vanadium (V), titanium (Ti), tungsten (W), aluminum (Al), niobium (Nb), hafnium (Hf) and tantalum (Ta); the alloy being balanced with Fe, and small inevitable amounts of contaminating elements; and wherein Si and P are in amounts effective to lower melting temperature. Further disclosed is a method of brazing and a product brazed with the brazing material.Type: ApplicationFiled: March 7, 2016Publication date: June 30, 2016Applicant: ALFA LAVAL CORPORATE ABInventor: Per Sjödin
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Publication number: 20160175990Abstract: The present invention relates to a blend of at least one phosphorous source and at least one silicon source, wherein silicon and phosphorous together are present in the blend in at least 25 wt %, and wherein the blend is a mechanical blend of powders, wherein each particle in the blend is either a phosphorous source particle or a silicon source particle. The present invention relates further to a composition comprising the blend a substrate applied with the blend, a method for providing a brazed product, and uses.Type: ApplicationFiled: September 11, 2014Publication date: June 23, 2016Applicant: ALFA LAVAL CORPORATE ABInventors: Per SJÖDIN, Kristian WALTER, Fredrik FALKENBERG
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Publication number: 20150093188Abstract: The present invention relates to a method for providing a braze alloy layered product comprising the following steps: —applying at least one silicon source and at least one boron source on at least a part of a surface of a substrate, wherein the at least one boron source and the at least one silicon source are oxygen free except for inevitable amounts of contaminating oxygen, and wherein the substrate comprises a parent material having a solidus temperature above 1100° C.; —heating the substrate having the applied boron source and the applied silicon source to a temperature lower than the solidus temperature of the parent material of the substrate; and cooling the substrate having the applied boron source and the applied silicon source, and obtaining the braze alloy layered product. The present invention relates further to a braze alloy layered product, a method for providing a brazed product, a method for providing a coated product, and uses of the braze alloy layered product.Type: ApplicationFiled: March 27, 2013Publication date: April 2, 2015Applicant: ALFA LAVAL CORPORATE ABInventors: Per Sjödin, Kristian Walter
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Publication number: 20150086776Abstract: The present invention relates to a blend of at least one boron source and at least one silicon source, wherein the blend comprises boron and silicon in a weight ratio boron to silicon within a range from about 5:100 to about 2:1, wherein silicon and boron are present in the blend in at least 25 wt %, and wherein the at least one boron source and the at least one silicon source are oxygen free except for inevitable amounts of contaminating oxygen, and wherein the blend is a mechanical blend of powders, and wherein particles in the powders have an average particle size less than 250 ?m. The present invention relates further to a composition comprising the blend a substrate applied with the blend, a method for providing a brazed product, and uses.Type: ApplicationFiled: March 27, 2013Publication date: March 26, 2015Applicant: ALFA LAVAL CORPORATE ABInventors: Per Sjödin, Kristian Walter
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Publication number: 20150060030Abstract: Disclosed is a method for producing a permanently joined plate heat exchanger comprising a plurality of metal heat exchanger plates having a solidus temperature above 1100° C., provided beside each other and forming a plate package with first plate interspaces for a first medium and second plate interspaces for a second medium, wherein the first and second plate interspaces are provided in an alternating order in the plate package, wherein each heat exchanger plate comprises a heat transfer area and an edge area comprising bent edges which extend around the heat transfer area, wherein a first surface of the plates forms a convex shape and a second surface of the plates forms a concave shape, wherein the heat transfer area comprises a corrugation of elevations and depressions, wherein said corrugation of the plates and the bent edges are provided by pressing the plates. Also disclosed is a plate heat exchanger produced by the method.Type: ApplicationFiled: March 27, 2013Publication date: March 5, 2015Inventors: Per Sjödin, Kristian Walter
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Publication number: 20150044507Abstract: The present invention relates to composition comprising a blend of at least one boron source and at least one silicon source, and the composition further comprises particles selected from particles having wear resistance properties, particles having surface enhancing properties, particles having catalytic properties or combinations thereof, wherein the blend comprises boron and silicon in a weight ratio boron to silicon within a range from about 3:100 wt:wt to about 100:3 wt:wt, wherein silicon and boron are present in the blend in at least 25 wt %, and wherein the at least one boron source and the at least one silicon source are oxygen free except for inevitable amounts of contaminating oxygen, and wherein the blend is a mechanical blend of particles in and the particles have an average particle size less than 250 ?m. The present invention relates further to a method for providing a coated product and a coated product obtained by the method.Type: ApplicationFiled: March 27, 2013Publication date: February 12, 2015Applicant: ALFA LAVAL CORPORATE ABInventor: Per Sjödin
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Publication number: 20150044501Abstract: A method for joining a first metal part (11) with a second metal part (12), the metal parts (11,12) having a solidus temperature above 1100 QC. The method comprises: applying a melting depressant composition (14) on a surface (15) of the first metal part (11), the melting depressant composition (14) comprising a melting depressant component that comprises at least 25 wt % boron and silicon for decreasing a melting temperature of the first metal part (11); bringing (202) the second metal part (12) into contact with the melting depressant composition (14) at a contact point (16) on said surface (15); heating the first and second metal parts (11,12) to a temperature above 1100 QC; and allowing a melted metal layer (210) of the first metal component (11) to solidify, such that a joint (25) is obtained at the contact point (16). The melting depressant composition and related products are also described.Type: ApplicationFiled: March 27, 2013Publication date: February 12, 2015Applicant: ALFA LAVAL CORPORATE ABInventors: Per Sjödin, Kristian Walter
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Publication number: 20150034286Abstract: Disclosed is a method for producing a permanently joined plate heat exchanger comprising a plurality of metal heat exchanger plates having a solidus temperature above 1100° C., provided beside each other and forming a plate package with first plate interspaces for a first medium and second plate interspaces for a second medium, wherein the first and second plate interspaces are provided in an alternating order in the plate package. Each heat exchanger plate comprises a heat transfer area and an edge area which extend around the heat transfer area. The heat transfer area comprises a corrugation of elevations and depressions, wherein said corrugation of the plates are provided by pressing the plates. Also disclosed is a plate heat exchanger produced by the method.Type: ApplicationFiled: March 28, 2013Publication date: February 5, 2015Inventors: Per Sjödin, Kristian Walter
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Publication number: 20150030837Abstract: The present invention relates to an intermediate product for joining and coating by brazing comprising a base metal and a blend of boron and silicon, said base metal having a solidus temperature above 1040° C., and the intermediate product has at least partly a surface layer of the blend on the base metal, wherein the boron in the blend is selected from a boron source, and the silicon in the blend is selected from a silicon source, and wherein the blend comprises boron and silicon in a ratio of boron to silicon within a range from about 3:100 wt/wt to about 100:3 wt/wt. The present invention relates also to a stacked intermediate product, to an assembled intermediate product, to a method of brazing, to a brazed product, to a use of an intermediate product, to a pre-brazed product, to a blend and to paint.Type: ApplicationFiled: March 27, 2013Publication date: January 29, 2015Applicant: ALFA LAVAL CORPORATE ABInventors: Per Sjödin, Kristian Walter
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Publication number: 20130084467Abstract: A method is provided for brazing products of stainless steel. The method comprises applying an iron-based brazing material to parts of stainless steel wherein the brazing material comprises an alloy consisting essentially of chromium (Cr); manganese (Mn); nickel (Ni); molybdenum (Mo); copper (Cu); nitrogen (N); silicon (Si); boron (B); phosphorus (P). The alloy is balanced with Fe, wherein Si, B and P are in amounts effective to lower melting temperature. The method comprises a step of optionally assembling these parts. The method comprises a step of heating the parts in a non-oxidizing atmosphere, in a reducing atmosphere, in a vacuum, or in combinations thereof, up to a temperature of at least 900° C., and brazing the parts at the temperature of at least 1070° C. for at least 15 minutes. The method further comprises optionally repeating one or more of these steps.Type: ApplicationFiled: September 11, 2012Publication date: April 4, 2013Applicant: ALFA LAVAL CORPORATE ABInventor: Per SJÖDIN
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Patent number: 8287805Abstract: The present invention relates an iron based brazing material comprising an alloy consisting essentially of: 15 to 30 wt % chromium (Cr); 0 to 5.0 wt % manganese (Mn); 15 to 30 wt % nickel (Ni); 1.0 to 12 wt % molybdenum (Mo); 0 to 4.0 wt % copper (Cu); 0 to 1.0 wt % nitrogen (N); 0 to 20 wt % silicone (Si); 0 to 2.0 wt % boron (B); 0 to 16 wt % phosphorus (P); optionally 0.0 to 2.5 wt % of each of one or more of elements selected from the group consisting of carbon (C), vanadium (V), titanium (Ti), tungsten (W), aluminum (Al), niobium (Nb), hafnium (Hf), and tantalum (Ta); the alloy being balanced with Fe, and small inevitable amounts of contaminating elements; and wherein Si, B and P are in amounts effective to lower melting temperature, and Si, B, and P are contained in amounts according to the following formula: Index=wt % P+1.1×wt % Si+3×wt % B, and the value of the Index is within the range of from about 5 wt % to about 20.Type: GrantFiled: November 14, 2007Date of Patent: October 16, 2012Assignee: Alfa Laval Corporate ABInventor: Per Sjödin
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Publication number: 20100055495Abstract: The present invention relates to a brazing material comprising an alloy containing essentially of: 15 to 30 wt % chromium (Cr); 0.1 to 5.0 wt % manganese (Mn); 9 to 20 wt % nickel (Ni); 0 to 4.0 wt % molybdenum (Mo); 0 to 1.0 wt % nitrogen (N); 1.0 to 7.0 wt % silicone (Si); 0 to 0.2 wt % boron (B); 1.0 to 7.0 wt % phosphorus (P); optionally 0.0 to 2.5 wt % of each of one or more of elements selected from the group consisting of vanadium (V), titanium (Ti), tungsten (W), aluminum (Al), niobium (Nb), hafnium (Hf) and tantalum (Ta); the alloy being balanced with Fe, and small inevitable amounts of contaminating elements; and wherein Si and P are in amounts effective to lower melting temperature. The present invention relates further to a method of brazing, a product brazed with the brazing material.Type: ApplicationFiled: November 14, 2007Publication date: March 4, 2010Applicant: ALFA LAVAL CORPORATE ABInventor: Per Sjödin