GB1070704A - An extension member for hydraulic pit props - Google Patents

An extension member for hydraulic pit props

Info

Publication number
GB1070704A
GB1070704A GB4836665A GB4836665A GB1070704A GB 1070704 A GB1070704 A GB 1070704A GB 4836665 A GB4836665 A GB 4836665A GB 4836665 A GB4836665 A GB 4836665A GB 1070704 A GB1070704 A GB 1070704A
Authority
GB
United Kingdom
Prior art keywords
extension member
pit props
nov
checks
hydraulic 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
GB4836665A
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.)
Kloeckner Werke AG
Original Assignee
Kloeckner Werke AG
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 Kloeckner Werke AG filed Critical Kloeckner Werke AG
Publication of GB1070704A publication Critical patent/GB1070704A/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
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/517—Extension elements
    • 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
    • E21D15/50—Component parts or details of props
    • E21D15/52—Extensible units located above or below standard props
    • E21D15/526—Extensible units located above or below standard props for step-by-step extension of the prop

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)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)
  • Clamps And Clips (AREA)

Abstract

1,070,704. Extension members for pit props. KLOCKNER-WERKE A. G. Nov. 15, 1965 [Nov. 14, 1964], No. 48366/65. Heading E1E. An extension member for a pit prop has a socketted end portion which is longitudinally split and provided adjacent the split d with opposed checks e'. e" welded thereto, the checks being recessed to retain captive nuts threaded to a common turn section, see also Figs. 1 and 3 (not shown).
GB4836665A 1964-11-14 1965-11-15 An extension member for hydraulic pit props Expired GB1070704A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK54531A DE1218381B (en) 1964-11-14 1964-11-14 Extension piece for hydraulic pit rams

Publications (1)

Publication Number Publication Date
GB1070704A true GB1070704A (en) 1967-06-01

Family

ID=7227137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4836665A Expired GB1070704A (en) 1964-11-14 1965-11-15 An extension member for hydraulic pit props

Country Status (4)

Country Link
BE (1) BE672297A (en)
DE (1) DE1218381B (en)
GB (1) GB1070704A (en)
NL (1) NL6514712A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104043950A (en) * 2014-06-23 2014-09-17 河南伟彤科技股份有限公司 Machining process of hydraulic support lifting jack cylinder

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE699242C (en) * 1939-07-26 1940-11-26 Karl Haferlach Extendable pit ram
DE1015403B (en) * 1954-08-17 1957-09-12 Dervaux Ets Extension piece for metallic pit punches
DE1850416U (en) * 1962-02-09 1962-04-26 Bwg Bergwerk Walzwerk FOOT EXTENSION PIECE FOR HYDRAULIC PIT STAMP.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104043950A (en) * 2014-06-23 2014-09-17 河南伟彤科技股份有限公司 Machining process of hydraulic support lifting jack cylinder
CN104043950B (en) * 2014-06-23 2017-01-04 河南伟彤科技股份有限公司 A kind of processing technique of Jack of Hydraulic Powered Supports cylinder barrel

Also Published As

Publication number Publication date
DE1218381B (en) 1966-06-08
NL6514712A (en) 1966-05-16
BE672297A (en) 1966-03-01

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