piston rings from several pieces

Patents Grantslast 30 patents

  • Information Patent Grant

    Compression piston ring for an internal combustion engine

    • Patent number 10,113,643
    • Issue date Oct 30, 2018
    • Ford Global Technologies, LLC
    • Rickey L. Williams
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Reduced compression height piston and piston assembly therewith and...

    • Patent number 10,065,276
    • Issue date Sep 4, 2018
    • Federal-Mogul LLC
    • Miguel Azevedo
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Process for manufacturing a piston ring

    • Patent number 4,499,643
    • Issue date Feb 19, 1985
    • Nippon Piston Ring Co., Ltd.
    • Hiroshi Ikutake
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Process for manufacturing a piston ring

    • Patent number 4,497,102
    • Issue date Feb 5, 1985
    • Nippon Piston Ring Co., Ltd.
    • Hiroshi Ikutake
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Method of manufacturing piston rings

    • Patent number 4,463,487
    • Issue date Aug 7, 1984
    • Associated Engineering Italy S.p.A.
    • Lodovico Raggi
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Piston ring with a Cr-C-Fe inlaid ring in its outer surface, and a...

    • Patent number 4,323,257
    • Issue date Apr 6, 1982
    • Toyota Jidosha Kogyo Kabushiki Kaisha
    • Katsumi Kondo
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Piston ring and method of making same

    • Patent number 4,299,401
    • Issue date Nov 10, 1981
    • Ramsey Corporation
    • Harold E. McCormick
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Method of making improved spring seal

    • Patent number 4,261,192
    • Issue date Apr 14, 1981
    • Robert Janian
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Method of manufacturing a piston ring

    • Patent number 4,247,972
    • Issue date Feb 3, 1981
    • Sealed Power Corporation
    • John L. Hendrixon
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Rolled metal piston ring

    • Patent number 4,214,762
    • Issue date Jul 29, 1980
    • Ramsey Corporation
    • Harold E. McCormick
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Method for manufacturing fully sealed piston ring

    • Patent number 4,192,051
    • Issue date Mar 11, 1980
    • Alfred Bergeron
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Method of making a spacer-expander spring for a piston ring assembly

    • Patent number 4,182,014
    • Issue date Jan 8, 1980
    • Dana Corporation
    • George J. Anderson
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Sealing ring assemblies for pistons

    • Patent number 4,111,438
    • Issue date Sep 5, 1978
    • Wellworthy Limited
    • Gerald Longfoot
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Process for production of oil control rings

    • Patent number 4,106,977
    • Issue date Aug 15, 1978
    • Audi NSU Auto Union Aktiengesellschaft
    • Heck Klaus
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Method for coating parts

    • Patent number 4,032,672
    • Issue date Jun 28, 1977
    • Ramsey Corporation
    • Harold E. McCormick
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Coupled piston ring method of manufacture

    • Patent number 3,991,455
    • Issue date Nov 16, 1976
    • Alfred Bergeron
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Composite metal seals for use in rotary internal engines

    • Patent number 3,947,161
    • Issue date Mar 30, 1976
    • Olin Corporation
    • Charles D. McLain
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Method of making composite metal seals for use in rotary internal c...

    • Patent number 3,933,293
    • Issue date Jan 20, 1976
    • Olin Corporation
    • Charles D. McLain
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3762010

    • Patent number 3,762,010
    • Issue date Oct 2, 1973
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3749559

    • Patent number 3,749,559
    • Issue date Jul 31, 1973
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3698054

    • Patent number 3,698,054
    • Issue date Oct 17, 1972
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3683477

    • Patent number 3,683,477
    • Issue date Aug 15, 1972
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3671047

    • Patent number 3,671,047
    • Issue date Jun 20, 1972
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3661402

    • Patent number 3,661,402
    • Issue date May 9, 1972
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3617349

    • Patent number 3,617,349
    • Issue date Nov 2, 1971
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3615099

    • Patent number 3,615,099
    • Issue date Oct 26, 1971
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3545775

    • Patent number 3,545,775
    • Issue date Dec 8, 1970
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3435502

    • Patent number 3,435,502
    • Issue date Apr 1, 1969
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3421198

    • Patent number 3,421,198
    • Issue date Jan 14, 1969
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3337938

    • Patent number 3,337,938
    • Issue date Aug 29, 1967
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents