Patents by Inventor Paulo Jose Da Rocha Mordente

Paulo Jose Da Rocha Mordente 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: 11143302
    Abstract: 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: Grant
    Filed: June 27, 2017
    Date of Patent: October 12, 2021
    Inventors: Juliano Avelar Araujo, Paulo Jose Da Rocha Mordente
  • Patent number: 10995857
    Abstract: 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: Grant
    Filed: October 12, 2019
    Date of Patent: May 4, 2021
    Assignees: MAHLE International GmbH, MAHLE Metal Leve S/A
    Inventors: Juliano Avelar Araujo, Nuno Costa, Paulo José Da Rocha Mordente, José Valentim Lima Sarabanda
  • Patent number: 10724637
    Abstract: A piston ring may include a drawn metal base of constant thickness having an outer peripheral surface. The piston ring may also include a hard coating disposed on the outer peripheral surface. The coating may have a thickness that is greater in a region of two butt ends of the base than a thickness of the coating in another region of the outer peripheral surface. The coating may be defined by a plurality of layers with a nanoscale structure.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: July 28, 2020
    Assignees: Mahle Metal Level S/A, Mahle International GmbH
    Inventor: Paulo Jose Da Rocha Mordente
  • Publication number: 20200049252
    Abstract: A one piece oil control ring for an internal combustion engine may include a plurality of segments having a metal base and being operatively associated with one another. Each segment of the plurality of segments may define a superior portion and an inferior portion which may both be oriented towards an internal surface of a cylinder liner. The superior portion and the inferior portion may each have a first surface substantially parallel to the internal surface of the cylinder liner wherefrom there may extend a substantially inclined second surface. The metal base may have a tempered martensitic matrix having a hardness of 400 HV to 600 HV. A nitrided layer may be disposed upon all surfaces of each of the plurality of segments.
    Type: Application
    Filed: October 5, 2017
    Publication date: February 13, 2020
    Inventors: Gisela Ablas Marques, Paulo Jose Da Rocha Mordente, Paulo Roberto Vieira De Morais
  • Publication number: 20200040996
    Abstract: 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: Application
    Filed: October 12, 2019
    Publication date: February 6, 2020
    Inventors: Juliano Avelar Araujo, Nuno Costa, Paulo José Da Rocha Mordente, José Valentim Lima Sarabanda
  • Patent number: 10436324
    Abstract: 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: Grant
    Filed: April 17, 2016
    Date of Patent: October 8, 2019
    Assignees: Mahle Metal Leve S/A, Mahle International GmbH
    Inventors: Juliano Avelar Araujo, Paulo Jose Da Rocha Mordente, Robert R. Banfield
  • Patent number: 10407764
    Abstract: A piston ring for an internal-combustion engine may include a body having a substantially annular external surface and a physical vapor deposition coating layer disposed on the external surface. The body may include a gap defined between a first end and a second end. The piston ring may also include a first half in a region of the gap and a second half opposite the first half. The coating layer of the first half may have a thickness gradient, and the coating layer may define a greater thickness in a vicinity of the first end and the second end and a reduced thickness in regions further away from the vicinity of the first end and the second end. The coating layer of the second half may have a uniform thickness.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: September 10, 2019
    Assignees: Mahle Metal Leve S/A, Mahle International GmbH
    Inventors: Paulo Jose Da Rocha Mordente, Davi Antonio Da Silva, Nuno Costa
  • Publication number: 20190154153
    Abstract: 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: Application
    Filed: June 27, 2017
    Publication date: May 23, 2019
    Inventors: Juliano Avelar Araujo, Paulo Jose Da Rocha Mordente
  • Patent number: 10294890
    Abstract: A sliding combination for use in an internal combustion engine may include at least one cylinder liner defining an internal sliding surface and a ring having an external lateral sliding surface. The external sliding surface of the ring may slide in relation to the internal sliding surface of the liner. The external sliding surface of the ring may include a first coating of a physical vapor deposited metal nitride in sliding contact with a second coating of a diamond-like carbon (DLC) material disposed on the internal sliding surface of the liner.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: May 21, 2019
    Assignees: Mahle Metal Leve S/A, Mahle International GmbH
    Inventors: Paulo Jose Da Rocha Mordente, Edney Deschauer Rejowski, Robert Richard Banfield, Jose Valentim Lima Sarabanda
  • Publication number: 20190120379
    Abstract: A piston ring may include a drawn metal base of constant thickness having an outer peripheral surface. The piston ring may also include a hard coating disposed on the outer peripheral surface. The coating may have a thickness that is greater in a region of two butt ends of the base than a thickness of the coating in another region of the outer peripheral surface. The coating may be defined by a plurality of layers with a nanoscale structure.
    Type: Application
    Filed: March 29, 2017
    Publication date: April 25, 2019
    Inventor: Paulo Jose Da Rocha Mordente
  • Patent number: 9810323
    Abstract: A piston ring may include a metallic base, an outer slide layer and an intermediate layer disposed between the base and the outer slide layer. The base may extend between at least two end regions. The outer slide layer and the intermediate layer may be disposed on an outer radial face of each end region of the base.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: November 7, 2017
    Assignees: Mahle International GmbH, Mahle Metal Leve S/A
    Inventors: Paulo Jose Da Rocha Mordente, Paulo R. Vieira De Morais, Jose V. Lima Sarabanda
  • Publication number: 20170306469
    Abstract: A piston ring for an internal-combustion engine may include a body having a substantially annular external surface and a physical vapor deposition coating layer disposed on the external surface. The body may include a gap defined between a first end and a second end. The piston ring may also include a first half in a region of the gap and a second half opposite the first half. The coating layer of the first half may have a thickness gradient, and the coating layer may define a greater thickness in a vicinity of the first end and the second end and a reduced thickness in regions further away from the vicinity of the first end and the second end. The coating layer of the second half may have a uniform thickness.
    Type: Application
    Filed: October 7, 2015
    Publication date: October 26, 2017
    Inventors: Paulo Jose Da Rocha Mordente, Davi Antonio Da Silva, Nuno Costa
  • Patent number: 9777239
    Abstract: An element with at least one slide surface with a coating for use on an internal combustion engine may include a base of a metallic alloy and at least one inner surface provided with a hard ceramic coating generated by physical vapor deposition. The element may include a porosity with a rate lower than 2 percent by volume, a Vickers hardness ranging from 1500 to 3000HV, and a compressive inner tension lower than 500 MPa.
    Type: Grant
    Filed: May 28, 2012
    Date of Patent: October 3, 2017
    Assignees: MAHLE Metal Leve S.A., MAHLE International GmbH
    Inventors: Paulo Jose Da Rocha Mordente, Robert R. Banfield, Jose V. Sarabanda
  • Patent number: 9650986
    Abstract: A cylinder for an internal combustion engine may include a metallic cylinder body and an amorphous diamond-like hard carbon film disposed on an internal peripheral surface of the cylinder body. The amorphous diamond-like carbon film may include a roughness ranging from Rz 0.5 ?m to Rz 4.0 ?m.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: May 16, 2017
    Assignees: MAHLE Metal Leve S.A., MAHLE International GmbH
    Inventors: Samantha Uehara, Paulo Jose Da Rocha Mordente, Edney Deschauer Rejowski
  • Publication number: 20160305014
    Abstract: A process for coating a cylinder or a liner of an internal combustion engine may involve a plasma assisted chemical vapour deposition (PACVD) technique. The process may include placing a component to be coated in a PACVD system; forming a negative pressure within the system in an inert atmosphere including argon, hydrogen, or a mixture thereof; activating a surface of the component at a bias voltage of 300 to 550 Vbias; performing an ionization of the component at a bias voltage of 800 to 1200 Vbias; depositing an adhesive layer having a precursor element on the surface of the component; depositing a transition layer having a gradient content of increasing amorphous carbon and decreasing precursor element; and depositing an upper layer composed of an amorphous carbon with the precursor element.
    Type: Application
    Filed: December 1, 2014
    Publication date: October 20, 2016
    Inventors: Paulo Jose Da Rocha Mordente, Edney Deschauer Rejowski, Jose Valentim Lima Sarabanda, Robert Richard Field
  • Publication number: 20160305547
    Abstract: 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: Application
    Filed: April 17, 2016
    Publication date: October 20, 2016
    Inventors: Juliano Avelar Araujo, Paulo Jose Da Rocha Mordente, Robert R. Banfield
  • Publication number: 20160305366
    Abstract: A sliding combination for use in an internal combustion engine may include at least one cylinder liner defining an internal sliding surface and a ring having an external lateral sliding surface. The external sliding surface of the ring may slide in relation to the internal sliding surface of the liner. The external sliding surface of the ring may include a first coating of a physical vapour deposited metal nitride in sliding contact with a second coating of a diamond-like carbon (DLC) material disposed on the internal sliding surface of the liner.
    Type: Application
    Filed: November 21, 2014
    Publication date: October 20, 2016
    Inventors: Paulo Jose Da Rocha Mordente, Edney Deschauer Rejowski, Robert Richard Banfield, Jose Valentim Lima Sarabanda
  • Publication number: 20160084380
    Abstract: A piston ring may include a metallic base, an outer slide layer and an intermediate layer disposed between the base and the outer slide layer. The base may extend between at least two end regions. The outer slide layer and the intermediate layer may be disposed on an outer radial face of each end region of the base.
    Type: Application
    Filed: May 15, 2014
    Publication date: March 24, 2016
    Inventors: Paulo Jose Da Rocha Mordente, Paulo R. Vieira De Morais, Jose V. Lima Sarabanda
  • Patent number: 9181870
    Abstract: The present invention relates to an element (1) that works sliding, of an internal combustion engine and/or a compressor that undergoes friction and receives a coating of chrome nitride having an equiaxial morphology, with low porosity (lower than 1%) and with a crystallographic orientation predominantly (111), maintaining some reticulate in the orientation (200), so as to improve its resistance to wear and its toughness, prolonging the useful life of the element (1) that works sliding.
    Type: Grant
    Filed: May 28, 2012
    Date of Patent: November 10, 2015
    Assignees: MAHLE METAL LEVE S/A, MAHLE INTERNATIONAL GMBH
    Inventors: Paulo Jose Da Rocha Mordente, Robert R. Banfield, Juliano A. Araujo, Jose V. Sarabanda
  • Patent number: 9175634
    Abstract: The present invention has the objective of solving the problems encountered in coating engine components (engine blocks or sleeves, either fixed or movable) having at least one cylindrical cavity and composed mainly by iron or aluminum, providing them with a coating (3) that is subdivided into three different layers, which are deposited onto the metallic substrate (1), which are first sub-layer (21) comprising at least 80% silicon deposited onto the substrate (1) with the function of providing interface with good adhesion between the substrate (1) and the subsequent sub-layers, which contain hydrogenated amorphous carbon, second sub-layer (22) of transition comprising a percentage of silicon and of hydrogenated amorphous carbon (a-C:H:Si) and, finally, on the working surface, third sub-layer (23) having a pure composition of hydrogenated amorphous carbon (a-C:H), wherein such coating (3) is generated by the hollow cathode effect (HCE) by plasma-enhanced chemical vapor deposition (PECVD).
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: November 3, 2015
    Assignees: Mahle International GmbH, Mahle Metal Leve S/A
    Inventor: Paulo Jose Da Rocha Mordente