ZA200407644B - Yieldable prop having a yield section - Google Patents

Yieldable prop having a yield section

Info

Publication number
ZA200407644B
ZA200407644B ZA2004/07644A ZA200407644A ZA200407644B ZA 200407644 B ZA200407644 B ZA 200407644B ZA 2004/07644 A ZA2004/07644 A ZA 2004/07644A ZA 200407644 A ZA200407644 A ZA 200407644A ZA 200407644 B ZA200407644 B ZA 200407644B
Authority
ZA
South Africa
Prior art keywords
yield section
yieldable prop
yieldable
prop
yield
Prior art date
Application number
ZA2004/07644A
Inventor
C Stankus John
G Oldsen John
Original Assignee
Fci Holdings Delaware Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US10/687,960 external-priority patent/US7114888B2/en
Priority claimed from US10/858,621 external-priority patent/US7134810B2/en
Application filed by Fci Holdings Delaware Inc filed Critical Fci Holdings Delaware Inc
Publication of ZA200407644B publication Critical patent/ZA200407644B/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring
    • E21D15/325—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring by a clamping ring
ZA2004/07644A 2003-10-17 2004-09-22 Yieldable prop having a yield section ZA200407644B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/687,960 US7114888B2 (en) 2002-02-22 2003-10-17 Yieldable prop
US10/858,621 US7134810B2 (en) 2002-02-22 2004-06-02 Yieldable prop having a yield section

Publications (1)

Publication Number Publication Date
ZA200407644B true ZA200407644B (en) 2005-09-28

Family

ID=34798978

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA2004/07644A ZA200407644B (en) 2003-10-17 2004-09-22 Yieldable prop having a yield section

Country Status (2)

Country Link
CN (1) CN1624297A (en)
ZA (1) ZA200407644B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102844523B (en) * 2010-02-19 2014-09-24 科学与工业研究会 A device for roof support of underground mine/tunnel
CN103255784B (en) * 2013-04-26 2015-04-08 同济大学 Steel support temperature deforming adjuster

Also Published As

Publication number Publication date
CN1624297A (en) 2005-06-08

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