GB860164A - Improvements relating to hydraulic supporting devices, for example, hydraulic pit-pro - Google Patents

Improvements relating to hydraulic supporting devices, for example, hydraulic pit-pro

Info

Publication number
GB860164A
GB860164A GB580357A GB580357A GB860164A GB 860164 A GB860164 A GB 860164A GB 580357 A GB580357 A GB 580357A GB 580357 A GB580357 A GB 580357A GB 860164 A GB860164 A GB 860164A
Authority
GB
United Kingdom
Prior art keywords
hydraulic
pro
improvements relating
supporting devices
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
GB580357A
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.)
Gutehoffnungshutte Sterkrade AG
Original Assignee
Gutehoffnungshutte Sterkrade 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 Gutehoffnungshutte Sterkrade AG filed Critical Gutehoffnungshutte Sterkrade AG
Publication of GB860164A publication Critical patent/GB860164A/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
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props

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)
  • Forging (AREA)
  • Prostheses (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

860,164. Mine roof supports. GUTEHOFFNUNGSHUTTE STERKRADE A. G. Feb. 20, 1957 [Feb. 20, 1956], No." 5803/57. Class 20(2) A hydraulic pit prop comprises three telescoping tubes. 1, 2, 3 'separated by a base 4 of the intermediate tube 2 into two pressure chambers 5, 6 each of which has a pressure relief valve 9, 10 which responds to pressures inversely proportional to the piston areas of the chamber 5 or 6 so that the part 3 telescopes into the part 2 under the same roof pressure as the parts 3 and 2 telescope into the part 1. The chambers 5 and 6 are supplied with fluid from separate inlets 7, 8.
GB580357A 1956-02-20 1957-02-20 Improvements relating to hydraulic supporting devices, for example, hydraulic pit-pro Expired GB860164A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG19019A DE1063101B (en) 1956-02-20 1956-02-20 Hydraulic pit ram

Publications (1)

Publication Number Publication Date
GB860164A true GB860164A (en) 1961-02-01

Family

ID=7121166

Family Applications (1)

Application Number Title Priority Date Filing Date
GB580357A Expired GB860164A (en) 1956-02-20 1957-02-20 Improvements relating to hydraulic supporting devices, for example, hydraulic pit-pro

Country Status (3)

Country Link
DE (1) DE1063101B (en)
FR (1) FR1166914A (en)
GB (1) GB860164A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252680A (en) * 1962-08-21 1966-05-24 Electro Hydraulics Ltd Roof supports
DE2636791A1 (en) * 1975-09-09 1977-03-17 Voest Ag HYDRAULIC PIT STAMP

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE607500A (en) * 1960-09-02
DE1149678B (en) * 1960-09-15 1963-06-06 Rheinstahl Gmbh Wanheim Multi-stage hydraulic pit ram
DE1153705B (en) * 1960-10-01 1963-09-05 Rheinstahl Gmbh Wanheim Hydraulic pit ram
DE1226972B (en) * 1964-10-20 1966-10-20 Gewerk Eisenhuette Westfalia Hydraulic double telescopic ram

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1639050A (en) * 1921-10-24 1927-08-16 Executrix Olive Eugenie Morgan Mining machine
DE800392C (en) * 1949-04-08 1950-11-02 Gewerk Eisenhuette Westfalia Hydraulic pit ram
GB716022A (en) * 1949-10-01 1954-09-29 Grebe Konrad Improvements in or relating to pit props

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252680A (en) * 1962-08-21 1966-05-24 Electro Hydraulics Ltd Roof supports
DE2636791A1 (en) * 1975-09-09 1977-03-17 Voest Ag HYDRAULIC PIT STAMP

Also Published As

Publication number Publication date
DE1063101B (en) 1959-08-13
FR1166914A (en) 1958-11-17

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