Electro-hydraulically controlled roof coal caving method and hydraulic support therefor

Details for Australian Patent Application No. 2005242116 (hide)

Owner Yanzhou Coal Mining Company Limited

Inventors Lai, Cunliang; Jin, Tai; Yang, Deyu

Agent Spruson & Ferguson

Pub. Number AU-B-2005242116

Priority 2004100364767 10.12.04 CN

Filing date 6 December 2005

Wipo publication date 29 June 2006

Acceptance publication date 31 July 2008

International Classifications

E21D 23/26 (2006.01) Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyers, mining machines, or guides therefor

E21D 15/59 (2006.01) Working-face supports

Event Publications

22 December 2005 Complete Application Filed

  Priority application(s): 2004100364767 10.12.04 CN

29 June 2006 Application Open to Public Inspection

  Published as AU-B-2005242116

31 July 2008 Amendment Made

  The nature of the amendment is: Amend the invention title to read Electro-hydraulically controlled roof coal caving method and hydraulic support therefor

31 July 2008 Application Accepted

  Published as AU-B-2005242116

27 November 2008 Standard Patent Sealed

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