FR731410A - trench prop - Google Patents

trench prop

Info

Publication number
FR731410A
FR731410A FR731410DA FR731410A FR 731410 A FR731410 A FR 731410A FR 731410D A FR731410D A FR 731410DA FR 731410 A FR731410 A FR 731410A
Authority
FR
France
Prior art keywords
prop
trench
trench prop
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samac S A
Original Assignee
Samac S A
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
Application filed by Samac S A filed Critical Samac S A
Application granted granted Critical
Publication of FR731410A publication Critical patent/FR731410A/en
Expired legal-status Critical Current

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
    • E21D15/02—Non-telescopic props
    • E21D15/06—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability
    • E21D15/08—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability with toggle joint connection
    • 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
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/20—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like, spaced apart at intervals

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR731410D 1932-01-13 1932-02-15 trench prop Expired FR731410A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH731410X 1932-01-13

Publications (1)

Publication Number Publication Date
FR731410A true FR731410A (en) 1932-09-02

Family

ID=4532391

Family Applications (1)

Application Number Title Priority Date Filing Date
FR731410D Expired FR731410A (en) 1932-01-13 1932-02-15 trench prop

Country Status (1)

Country Link
FR (1) FR731410A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612463A (en) * 1969-02-06 1971-10-12 Andrew Grant Wedging device for pallet loads
WO2016008205A1 (en) * 2014-07-12 2016-01-21 朱林学 One-way retracting flexible support

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612463A (en) * 1969-02-06 1971-10-12 Andrew Grant Wedging device for pallet loads
WO2016008205A1 (en) * 2014-07-12 2016-01-21 朱林学 One-way retracting flexible support

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