Patents by Inventor Alwin Perras

Alwin Perras 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).

  • Injection valve comprising an optimized surface geometry between a nozzle body and a retaining nut
    Patent number: 6938880
    Abstract: The injection valve has a housing, a nozzle body and a clamping nut connected to the housing that contacts the nozzle body with first contact surface (9) acting on a second contact surface (10), whereby the clamping nut clamps the nozzle body against the housing. The first or second contact surface has a curvature (24) towards the second or first contact surface and the both contact surfaces are in contact in the area of the curvature.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: September 6, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventors: Olaf Enke, Günter Lewentz, Alwin Perras, Andreas Voigt, Hakan Yalcin
  • Device for fixing injectors on a cylinder head
    Patent number: 6886539
    Abstract: The invention concerns a fixing device for fixing an injector on a cylinder head. Said injector comprises several axially successive modules pressed against one another by means of a prestressing element. A fixing force for fixing the injector is applied on the prestressing element to counter the influence of opposite forces applied on the injector modules.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: May 3, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventor: Alwin Perras
  • Injection valve comprising an optimized surface geometry between a nozzle body and a retaining nut
    Publication number: 20040217321
    Abstract: The injection valve has a housing, a nozzle body and a clamping nut connected to the housing that contacts the nozzle body with first contact surface (9) acting on a second contact surface (10), whereby the clamping nut clamps the nozzle body against the housing. The first or second contact surface has a curvature (24) towards the second or first contact surface and the both contact surfaces are in contact in the area of the curvature.
    Type: Application
    Filed: May 27, 2004
    Publication date: November 4, 2004
    Inventors: Olaf Enke, Gunter Lewentz, Alwin Perras, Andreas Voigt, Hakan Yalcin
  • Injection valve comprising an optimized surface geometry between a nozzle body and a retaining nut
    Patent number: 6799748
    Abstract: The injection valve has a housing, a nozzle body and a clamping nut connected to the housing that contacts the nozzle body with first contact surface (9) acting on a second contact surface (10), whereby the clamping nut clamps the nozzle body against the housing. The first or second contact surface has a curvature (24) towards the second or first contact surface and the both contact surfaces are in contact in the area of the curvature.
    Type: Grant
    Filed: October 14, 2002
    Date of Patent: October 5, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventors: Olaf Enke, Günter Lewentz, Alwin Perras, Andreas Voigt, Hakan Yalcin
  • Device for fixing injectors on a cylinder head
    Publication number: 20040173186
    Abstract: The invention concerns a fixing device for fixing an injector on a cylinder head. Said injector comprises several axially successive modules pressed against one another by means of a prestressing element. A fixing force for fixing the injector is applied on the prestressing element to counter the influence of opposite forces applied on the injector modules.
    Type: Application
    Filed: March 16, 2004
    Publication date: September 9, 2004
    Inventor: Alwin Perras
  • Injection needle with flexible needle tip
    Publication number: 20030213459
    Abstract: An injection needle comprising a needle tip, elastically connected to a needle shaft by means of a connector piece. A damping of the force with which the needle tip hits the corresponding sealing seat is possible by means of the elastic connection. The load on the sealing seat is thus reduced.
    Type: Application
    Filed: May 2, 2003
    Publication date: November 20, 2003
    Inventors: Thomas Hofmann, Alwin Perras, Hakan Yalcin
  • Injection valve comprising an optimized surface geometry between a nozzle body and a retaining nut
    Publication number: 20030085304
    Abstract: The injection valve has a housing, a nozzle body and a clamping nut connected to the housing that contacts the nozzle body with first contact surface (9) acting on a second contact surface (10), whereby the clamping nut clamps the nozzle body against the housing. The first or second contact surface has a curvature (24) towards the second or first contact surface and the both contact surfaces are in contact in the area of the curvature.
    Type: Application
    Filed: October 14, 2002
    Publication date: May 8, 2003
    Inventors: Olaf Enke, Gunter Lewentz, Alwin Perras, Andreas Voigt, Hakan Yalcin