GB323608A - A telescopic steel pit prop - Google Patents

A telescopic steel pit prop

Info

Publication number
GB323608A
GB323608A GB2966828A GB2966828A GB323608A GB 323608 A GB323608 A GB 323608A GB 2966828 A GB2966828 A GB 2966828A GB 2966828 A GB2966828 A GB 2966828A GB 323608 A GB323608 A GB 323608A
Authority
GB
United Kingdom
Prior art keywords
inner member
telescopic steel
hollow
pit prop
steel pit
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
GB2966828A
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.)
BUTTERLEY CO Ltd
Original Assignee
BUTTERLEY CO Ltd
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 BUTTERLEY CO Ltd filed Critical BUTTERLEY CO Ltd
Priority to GB2966828A priority Critical patent/GB323608A/en
Publication of GB323608A publication Critical patent/GB323608A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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
    • E21D15/18—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure

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)
  • Reciprocating Pumps (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

323,608. Butterley Co., Ltd., and Abbott, G. O. Feb. 15, 1929. Mine props.-A telescopic prop of the type in which the piston-like end of an inner member rests upon loose material contained within an outer tubular member, has a space provided between the tubular members and the end of the inner member slopes backwardly at d from its outer end to provide an enlarged space into which the material may flow without choking. The inner member end-portion is hollow and provided with an inwardly sloping surface e to rest on the material, a cylindrical part f, and then an upper outwardly sloping portion g which allows free flow of the material into the hollow inner member.
GB2966828A 1929-02-15 1929-02-15 A telescopic steel pit prop Expired GB323608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2966828A GB323608A (en) 1929-02-15 1929-02-15 A telescopic steel pit prop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2966828A GB323608A (en) 1929-02-15 1929-02-15 A telescopic steel pit prop

Publications (1)

Publication Number Publication Date
GB323608A true GB323608A (en) 1930-01-16

Family

ID=10295188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2966828A Expired GB323608A (en) 1929-02-15 1929-02-15 A telescopic steel pit prop

Country Status (1)

Country Link
GB (1) GB323608A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902365C (en) * 1936-07-30 1954-01-21 Rudolf Spolders Hiking pillar
US3830468A (en) * 1973-06-11 1974-08-20 I Willis Trailer jack

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902365C (en) * 1936-07-30 1954-01-21 Rudolf Spolders Hiking pillar
US3830468A (en) * 1973-06-11 1974-08-20 I Willis Trailer jack

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