Patents by Inventor Juliano Avelar Araujo
Juliano Avelar Araujo 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: 20240110287Abstract: A sliding member may include a metallic base, at least one intermediate bonding layer disposed on the metallic base, and a multilayer protective coating disposed on the intermediate bonding layer. The at least one intermediate bonding layer may be composed of at least one metal. The multilayer protective coating may include a plurality of CrAlN layers and a plurality of Cr(Al)N layers arranged in an alternating manner. The multilayer protective coating may include a plurality of periodicity layer groups, each of which may be defined by a CrAlN layer and an adjacent Cr(Al)N layer. The plurality of CrAlN layers may have a higher Al content than the plurality of Cr(Al)N layers. A thickness ratio of the CrAlN layer to the Cr(Al)N layer in each periodicity layer group may be from 1 to 10. The multilayer protective coating may have a total Al content of 15 to 40 atom-%.Type: ApplicationFiled: October 3, 2023Publication date: April 4, 2024Inventors: Juliano Avelar Araújo, Rafael Rabello
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Patent number: 11143302Abstract: A sliding element may include a base material having an annular external surface upon which a bonding layer and a sliding layer are sequentially deposited. The sliding layer may be composed of hard amorphous carbon of a combined matrix with sp3/sp2 bonds. The sliding layer may include a plurality of nanoparticles of graphite incorporated within the combined matrix of sp3/sp2.Type: GrantFiled: June 27, 2017Date of Patent: October 12, 2021Inventors: Juliano Avelar Araujo, Paulo Jose Da Rocha Mordente
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Patent number: 10995857Abstract: A piston ring for internal combustion engines provided with a ferrous alloy base includes an annular outer surface on which a coating including at least one outer layer is applied deposited on an adhesive layer, the outer layer being provided with a variable thickness, in such a way that the thickness of the outer layer gradually increases from 90° and 270° towards 0° and 360° respectively, with the thickness attaining its maximum value in the region of 10° and 350° and slightly decreasing towards 0° and 360° so as to ensure an optimal working condition, minimizing the contact pressure and consequently the accelerated wear in the vicinities of the ends of the ring, in addition to preventing and/or impeding the detachment of the outer layer of the coating.Type: GrantFiled: October 12, 2019Date of Patent: May 4, 2021Assignees: MAHLE International GmbH, MAHLE Metal Leve S/AInventors: Juliano Avelar Araujo, Nuno Costa, Paulo José Da Rocha Mordente, José Valentim Lima Sarabanda
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Publication number: 20200040996Abstract: A piston ring for internal combustion engines provided with a ferrous alloy base includes an annular outer surface on which a coating including at least one outer layer is applied deposited on an adhesive layer, the outer layer being provided with a variable thickness, in such a way that the thickness of the outer layer gradually increases from 90° and 270° towards 0° and 360° respectively, with the thickness attaining its maximum value in the region of 10° and 350° and slightly decreasing towards 0° and 360° so as to ensure an optimal working condition, minimizing the contact pressure and consequently the accelerated wear in the vicinities of the ends of the ring, in addition to preventing and/or impeding the detachment of the outer layer of the coating.Type: ApplicationFiled: October 12, 2019Publication date: February 6, 2020Inventors: Juliano Avelar Araujo, Nuno Costa, Paulo José Da Rocha Mordente, José Valentim Lima Sarabanda
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Patent number: 10487730Abstract: A sliding element, for example a piston ring for an internal combustion engine, may include a sliding face, an adhesive layer disposed on the sliding face, and a coating disposed over the adhesive layer. The coating may be composed of an amorphous carbon material. The coating may have a ratio between sp3 bonds and sp2 bonds that indicates a predominance of sp2 bonds. The coating may have a roughness profile including a value of Rpk of ?0.15 ?m and a value of Rz of 0.7?Rz?1.5 ?m.Type: GrantFiled: December 20, 2016Date of Patent: November 26, 2019Assignees: Mahle Metal Leve S/A, Mahle International GmbHInventors: Juliano Avelar Araujo, Eliel Dos Santos Paes
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Patent number: 10436324Abstract: A piston ring for an internal combustion engine may include a substantially annular base of a ferrous alloy upon which is applied a coating. The coating may have a first bonding layer and at least a first external layer or a second external layer deposited upon the first bonding layer up to a maximum of 100 micrometers in thickness of a plurality of sequentially deposited first and second external layers. The first external layer may include a nitride of a doped metal chemical element, a doping element being aluminum. The second external layer may include a nitride of the metal chemical element. The first external layer may have a thickness greater than at least once a thickness of the second external layer and less than ten times the thickness of the second external layer.Type: GrantFiled: April 17, 2016Date of Patent: October 8, 2019Assignees: Mahle Metal Leve S/A, Mahle International GmbHInventors: Juliano Avelar Araujo, Paulo Jose Da Rocha Mordente, Robert R. Banfield
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Patent number: 10400895Abstract: A sliding element for internal combustion engines may include a sliding face upon which are deposited, from the sliding face outwards, an adhesive layer and a coating of hard amorphous carbon. The coating may present a proportion of sp3 to sp2 ranging from 0.42 to 2.33 and at least one of an Rmr (0.2-0.5) profile greater than at least 25% and/or an Rmr (0.3-0.5) profile greater than at least 50%.Type: GrantFiled: October 7, 2016Date of Patent: September 3, 2019Assignees: Mahle Metal Leve S/A, Mahle International GmbHInventors: Robert Richard Banfield, Juliano Avelar Araujo
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Publication number: 20190154153Abstract: A sliding element may include a base material having an annular external surface upon which a bonding layer and a sliding layer are sequentially deposited. The sliding layer may be composed of hard amorphous carbon of a combined matrix with sp3/sp2 bonds. The sliding layer may include a plurality of nanoparticles of graphite incorporated within the combined matrix of sp3/sp2.Type: ApplicationFiled: June 27, 2017Publication date: May 23, 2019Inventors: Juliano Avelar Araujo, Paulo Jose Da Rocha Mordente
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Patent number: 10246767Abstract: A sliding element for internal combustion engines may include a ferrous base provided with a film applied upon a sliding surface. The film may have, sequentially, a metal connecting layer, a transitional layer, and a contact layer. The transitional layer may include a carbide containing a metal element. The contact layer may contain DLC (diamond-like carbon) doped with the metal element of the transitional layer, the DLC containing a maximum of 2% hydrogen by weight. An atomic ratio between metal and carbon in the contact layer in terms of a ratio Me/C is equal to or less than 0.1.Type: GrantFiled: April 1, 2015Date of Patent: April 2, 2019Assignees: Mahle Metal Leve S/A, Mahle International GmbHInventors: Juliano Avelar Araujo, Robert R. Banfield
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Patent number: 10174841Abstract: The present invention refers to a piston ring for internal combustion engine, having an outer surface of a coating of Chromium Nitride (CrN and Cr2N) and Niobium Nitride (NbN and Nb4N3), capable of offering greater resistance to peeling of the coating, also maintaining an excellent level of resistance to wear and tear and scratches to the layer of Chromium Nitride deposited.Type: GrantFiled: June 10, 2016Date of Patent: January 8, 2019Assignee: MAHLE Metal Leve S/AInventor: Juliano Avelar Araujo
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Publication number: 20170175622Abstract: A sliding element, for example a piston ring for an internal combustion engine, may include a sliding face, an adhesive layer disposed on the sliding face, and a coating disposed over the adhesive layer. The coating may be composed of an amorphous carbon material. The coating may have a ratio between sp3 bonds and sp2 bonds that indicates a predominance of sp2 bonds. The coating may have a roughness profile including a value of Rpk of ?0.15 ?m and a value of Rz of 0.7?Rz?1.5 ?m.Type: ApplicationFiled: December 20, 2016Publication date: June 22, 2017Inventors: Juliano Avelar Araujo, Eliel Dos Santos Paes
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Publication number: 20170121810Abstract: A sliding element for internal combustion engines may include a ferrous base provided with a film applied upon a sliding surface. The film may have, sequentially, a metal connecting layer, a transitional layer, and a contact layer. The transitional layer may include a carbide containing a metal element. The contact layer may contain DLC (diamond-like carbon) doped with the metal element of the transitional layer, the DLC containing a maximum of 2% hydrogen by weight. An atomic ratio between metal and carbon in the contact layer in terms of a ratio Me/C is equal to or less than 0.1.Type: ApplicationFiled: April 1, 2015Publication date: May 4, 2017Applicants: Mahle Metal Leve S/A, Mahle International GmbH, Mahle International GmbHInventors: Juliano Avelar Araujo, Robert R. Banfield
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Publication number: 20170102071Abstract: A sliding element for internal combustion engines may include a sliding face upon which are deposited, from the sliding face outwards, an adhesive layer and a coating of hard amorphous carbon. The coating may present a proportion of sp3 to sp2 ranging from 0.42 to 2.33 and at least one of an Rmr (0.2-0.5) profile greater than at least 25% and/or an Rmr (0.3-0.5) profile greater than at least 50%.Type: ApplicationFiled: October 7, 2016Publication date: April 13, 2017Inventors: Robert Richard Banfield, Juliano Avelar Araujo
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Patent number: 9550953Abstract: A sliding component for an internal combustion engine may include a ferrous base having a peripheral sliding surface covered with a protective layer including at least one of a nitride applied via physical vapor deposition and a nitrided layer. The base may include a coating of carbon of a diamond-like carbon type. The coating may include at least one of (i) a transition layer including a composition of WC1-X and (ii) a layer of metallic chromium of crystalline structure disposed between the ferrous base and an outer layer of amorphous carbon. The coating may also include an intermediate layer of a nanocrystalline phase of carbides in a multilayer structure having a first sub-layer including a composition different than a second sub-layer disposed under the outer layer.Type: GrantFiled: December 7, 2012Date of Patent: January 24, 2017Assignees: Mahle Metal Leve S/A, Mahle International GmbHInventors: Juliano Avelar Araujo, Nuno Costa
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Publication number: 20160305547Abstract: A piston ring for an internal combustion engine may include a substantially annular base of a ferrous alloy upon which is applied a coating. The coating may have a first bonding layer and at least a first external layer or a second external layer deposited upon the first bonding layer up to a maximum of 100 micrometers in thickness of a plurality of sequentially deposited first and second external layers. The first external layer may include a nitride of a doped metal chemical element, a doping element being aluminum. The second external layer may include a nitride of the metal chemical element. The first external layer may have a thickness greater than at least once a thickness of the second external layer and less than ten times the thickness of the second external layer.Type: ApplicationFiled: April 17, 2016Publication date: October 20, 2016Inventors: Juliano Avelar Araujo, Paulo Jose Da Rocha Mordente, Robert R. Banfield
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Publication number: 20160281849Abstract: The present invention refers to a piston ring for internal combustion engine, having an outer surface of a coating of Chromium Nitride (CrN and Cr2N) and Niobium Nitride (NbN and Nb4N3), capable of offering greater resistance to peeling of the coating, also maintaining an excellent level of resistance to wear and tear and scratches to the layer of Chromium Nitride deposited.Type: ApplicationFiled: June 10, 2016Publication date: September 29, 2016Inventor: Juliano Avelar Araujo
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Patent number: 9388486Abstract: The present invention refers to a piston ring for internal combustion engine, having an outer surface of a coating of Chromium Nitride (CrN and Cr2N) and Niobium Nitride (NbN and Nb4N3), capable of offering greater resistance to peeling of the coating, also maintaining an excellent level of resistance to wear and tear and scratches to the layer of Chromium Nitride deposited.Type: GrantFiled: June 26, 2009Date of Patent: July 12, 2016Assignee: MAHLE Metal Leve S/AInventor: Juliano Avelar Araujo
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Publication number: 20150345003Abstract: A metallic member for a mobile system of an internal combustion engine may include a body defining a crystallographic structure. The crystallographic structure may include an outer layer, a substrate and a saturated zone between the outer layer and the substrate. An external element may be dispersed at least partially through the crystallographic structure of the body. The body may be subjected to a superficial hardening treatment from infiltrating the external element into the crystallographic structure of the body via a laser beam penetrating at least one portion of an outer surface of the outer layer of the body.Type: ApplicationFiled: September 11, 2013Publication date: December 3, 2015Inventors: Denys Flores, Juliano Avelar Araujo
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Publication number: 20140323368Abstract: The present invention relates to a sliding component for use in internal combustion engines, provided with a ferrous base (10) coated with a protective surface layer (11) composed of at least one nitride and applied by physical vapor deposition (PVD) or a nitrided layer to the sliding peripheral surface (2) of which a diamond-like carbon (DLC) coating (12) is applied, the coating (12) comprising at least one transition layer (122) composed of WC1-x and/or of at least one layer (121) of chromium metal with a crystalline structure (bcc—body cubic center) located between the ferrous base (10) and an external layer of amorphous carbon (124).Type: ApplicationFiled: December 7, 2012Publication date: October 30, 2014Inventors: Juliano Avelar Araujo, Nuno Costa
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Publication number: 20140220380Abstract: A slide component, used in internal combustion engines, provided with a metal-based substrate material and a protective liner (R), with the slide component having at least two main elements, the first one composed by an element with high resistance to corrosion, and the second element providing increase of the resistance to wear and/or presenting lower friction than the substrate material, both of them covering at least one of the surfaces of the slide component.Type: ApplicationFiled: March 29, 2012Publication date: August 7, 2014Applicants: MAHLE METAL LEVE S/A, MAHLE INTERNATIONAL GMBHInventors: José Valentim Lima Sarabanda, Edmo Soares, Juliano Avelar Araujo