Hydraulic circuit for longwall supports

Details for Australian Patent Application No. 2004295371 (hide)

Owner Tiefenbach Control Systems GmbH

Inventors Kussel, Willi

Agent Phillips Ormonde Fitzpatrick

Pub. Number AU-B-2004295371

PCT Pub. Number WO2005/054629

Priority 103 56 421.7 29.11.03 DE

Filing date 18 November 2004

Wipo publication date 16 June 2005

Acceptance publication date 16 July 2009

International Classifications

E21D 23/16 (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 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

F15B 11/16 (2006.01) Servomotor systems without provision for follow-up action

F15B 20/00 (2006.01) Safety arrangements for fluid actuator systems

Event Publications

20 July 2006 PCT application entered the National Phase

  PCT publication WO2005/054629 Priority application(s): WO2005/054629

2 July 2009 Amendment Made

  The nature of the amendment is: Amend the invention title to read Hydraulic circuit for longwall supports

16 July 2009 Application Accepted

  Published as AU-B-2004295371

12 November 2009 Standard Patent Sealed

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