Patents by Inventor Mark G. Luehrmann

Mark G. Luehrmann 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: 9464591
    Abstract: A cylinder liner sealing arrangement for an internal combustion engine including a cylinder block having cylinder bores, a cylinder head, a cylinder liner within each cylinder bore and a circumferential cut-out formed in the upper and outer surfaces of the cylinder liner. A circular sealing ring is positioned in the circumferential cut-out with the sealing ring contacting at least the cylinder block and the cylinder liner to form a coolant seal therebetween. The sealing ring includes a seal enhancing configuration formed on at least an outer circumferential surface of the sealing ring with the seal enhancing configuration including at least one of an arcuate portion of a “D” ring seal or a plurality of circumferentially extending ribs.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: October 11, 2016
    Assignee: Cummins Intellectual Properties, Inc.
    Inventors: Joseph Worthington, Terry M. Shaw, David Genter, Dan E. Richardson, Ian McGiffen, Mark G. Luehrmann, Keith Gunter
  • Publication number: 20140090619
    Abstract: A cylinder liner sealing arrangement for an internal combustion engine including a cylinder block having cylinder bores, a cylinder head, a cylinder liner within each cylinder bore and a circumferential cut-out formed in the upper and outer surfaces of the cylinder liner. A circular sealing ring is positioned in the circumferential cut-out with the sealing ring contacting at least the cylinder block and the cylinder liner to form a coolant seal therebetween. The sealing ring includes a seal enhancing configuration formed on at least an outer circumferential surface of the sealing ring with the seal enhancing configuration including at least one of an arcuate portion of a “D” ring seal or a plurality of circumferentially extending ribs.
    Type: Application
    Filed: December 9, 2013
    Publication date: April 3, 2014
    Applicant: CUMMINS INTELLECTUAL PROPERTIES, INC.
    Inventors: Joseph Worthington, Terry M. Shaw, David Genter, Dan E. Richardson, Ian McGiffen, Mark G. Luehrmann, Keith Gunter
  • Patent number: 8601995
    Abstract: A cylinder liner sealing arrangement for an internal combustion engine including a cylinder block having cylinder bores, a cylinder head, a cylinder liner within each cylinder bore and a circumferential cut-out formed in the upper and outer surfaces of the cylinder liner. A circular sealing ring is positioned in the circumferential cut-out with the sealing ring contacting at least the cylinder block and the cylinder liner to form a coolant seal therebetween. The sealing ring includes a seal enhancing configuration formed on at least an outer circumferential surface of the sealing ring with the seal enhancing configuration including at least one of an arcuate portion of a “D” ring seal or a plurality of circumferentially extending ribs.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: December 10, 2013
    Assignee: Cummins Intellectual Property, Inc.
    Inventors: Joseph Worthington, Terry M. Shaw, Dave Genter, Dan E. Richardson, Ian McGiffen, Mark G. Luehrmann, Keith Gunter
  • Publication number: 20130032117
    Abstract: A cylinder liner sealing arrangement for an internal combustion engine including a cylinder block having cylinder bores, a cylinder head, a cylinder liner within each cylinder bore and a circumferential cut-out formed in the upper and outer surfaces of the cylinder liner. A circular sealing ring is positioned in the circumferential cut-out with the sealing ring contacting at least the cylinder block and the cylinder liner to form a coolant seal therebetween. The sealing ring includes a seal enhancing configuration formed on at least an outer circumferential surface of the sealing ring with the seal enhancing configuration including at least one of an arcuate portion of a “D” ring seal or a plurality of circumferentially extending ribs.
    Type: Application
    Filed: August 3, 2011
    Publication date: February 7, 2013
    Applicant: CUMMINS INTELLECTUAL PROPERTIES, INC.
    Inventors: Joseph Worthington, Terry M. Shaw, Dave Genter, Dan E. Richardson, Ian McGiffen, Mark G. Luehrmann, Keith Gunter
  • Patent number: 7240584
    Abstract: An engine cylinder piston connecting rod subassembly, for use in an engine, includes a piston (53), a piston pin (52) and a connecting rod (51). The connecting rod has a piston end portion with a piston pin bore (62). The piston pin is inserted through the piston pin bore and oppositely disposed portions of the piston, for securing the piston and the connecting rod together. Opposite ends of the piston pin bore are machined or profiled with relief portions (60, 61), to allow for piston pin deflection and thereby maximize the load carrying capacity, by providing a greater area of contact. The relief portions can be a curved surface (65) machined as part of the bore, or a plurality of end-to-end angled frustoconical surfaces (66a, 66b, 66c). The relief portions are shaped to correspond to the shape of the corresponding piston pin when under load during normal engine operation.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: July 10, 2007
    Assignee: Cummins Engine Company, Inc.
    Inventors: Mark G. Luehrmann, Mary E. Rupp, Mark D. O'Leary, Ilya L. Piraner, John M. Miller, William D. McNulty, Cheryl Klepser