A random, nondestructive and dynamic testing apparatus and method of the stressed state of a roof bolt

Details for Australian Patent Application No. 2006345338 (hide)

Owner China University of Mining and Technology

Inventors Mao, Xianbiao; Xu, Jinhai; Li, Qingfeng; Qin, Hao; Miao, Xiexing

Agent Pizzeys

Pub. Number AU-B-2006345338

PCT Pub. Number WO2007/137466

Priority 200610040779.5 01.06.06 CN

Filing date 22 December 2006

Wipo publication date 6 December 2007

Acceptance publication date 17 June 2010

International Classifications

E21D 21/00 (2006.01) Anchoring-bolts for roof, floor, or shaft-lining protection

F16B 31/02 (2006.01) Screwed connections specially modified in view of tensile load

G01L 1/10 (2006.01) Measuring force or stress, in general - by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings

Event Publications

23 October 2008 PCT application entered the National Phase

  PCT publication WO2007/137466 Priority application(s): WO2007/137466

27 November 2008 Amendment Made

  The nature of the amendment is: Amend the invention title to read from A random, nondestructiv and dynamic testing apparatus and method of the stressed state of a roof bolt to A random, nondestructive and dynamic testing apparatus and method of the stressed state of a roof bolt

17 June 2010 Application Accepted

  Published as AU-B-2006345338

14 October 2010 Standard Patent Sealed

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