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David Chelchowski

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  • Adelaide, AU
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Patents Grantslast 30 patents

  • Information Patent Grant

    Stepped down grip ring for use in pipe couplings and pipe coupling...
    • Patent number 8,764,069
    • Issue date Jul 1, 2014
    • Philmac Pty Ltd
    • Peter Newall
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Method of manufacture of a nut and tail assembly
    • Patent number 7,846,365
    • Issue date Dec 7, 2010
    • Philmac Pty Ltd
    • David Chelchowski
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Collet for pipe coupling
    • Patent number 7,455,328
    • Issue date Nov 25, 2008
    • David Chelchowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    O-ring
    • Patent number D558037
    • Issue date Dec 25, 2007
    • Philmac Pty Ltd
    • David Chelchowski
    • D08 - Tools and hardware
  • Information Patent Grant

    Pipe coupling
    • Patent number 7,270,351
    • Issue date Sep 18, 2007
    • David Chelchowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Nut and tail assembly
    • Patent number 7,178,838
    • Issue date Feb 20, 2007
    • Philmac Pty Ltd
    • David Chelchowski
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Pipe coupling
    • Patent number 6,974,162
    • Issue date Dec 13, 2005
    • David Chelchowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Coupling device for polymeric pipes
    • Patent number 6,702,336
    • Issue date Mar 9, 2004
    • David Chelchowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Ball valve
    • Patent number 6,471,183
    • Issue date Oct 29, 2002
    • Bogdan Roszkowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    STEPPED DOWN GRIP RING FOR USE IN PIPE COUPLINGS AND PIPE COUPLING...
    • Publication number 20120175874
    • Publication date Jul 12, 2012
    • PHILMAC PTY LTD
    • Peter Newall
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    METHOD OF MANUFACTURE OF A NUT AND TAIL ASSEMBLY
    • Publication number 20090250837
    • Publication date Oct 8, 2009
    • PHILMAC PTY LTD
    • David Chelchowski
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Pipe Coupling Adapted for Sealing the End of a Pipe
    • Publication number 20090127803
    • Publication date May 21, 2009
    • PHILMAC PTY LTD
    • David Chelchowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Method of manufacture of a nut and tail assembly
    • Publication number 20060214328
    • Publication date Sep 28, 2006
    • PHILMAC PTY LTD
    • David Chelchowski
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Pipe coupling
    • Publication number 20050285391
    • Publication date Dec 29, 2005
    • David Chelchowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Collet for pipe coupling
    • Publication number 20050084327
    • Publication date Apr 21, 2005
    • David Chelchowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Nut and tail assembly and method for the production thereof said ta...
    • Publication number 20040251687
    • Publication date Dec 16, 2004
    • David Chelchowski
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Coupling device for polymeric pipes
    • Publication number 20040169370
    • Publication date Sep 2, 2004
    • David Chelchowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    COUPLING DEVICE FOR POLYMERIC PIPES
    • Publication number 20040041399
    • Publication date Mar 4, 2004
    • David Chelchowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Pipe coupling
    • Publication number 20030197380
    • Publication date Oct 23, 2003
    • David Chelchowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Ball valve
    • Publication number 20010008277
    • Publication date Jul 19, 2001
    • Bogdan Roszkowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...