GB846783A - Improvements in or relating to mine supports - Google Patents

Improvements in or relating to mine supports

Info

Publication number
GB846783A
GB846783A GB38719/57A GB3871957A GB846783A GB 846783 A GB846783 A GB 846783A GB 38719/57 A GB38719/57 A GB 38719/57A GB 3871957 A GB3871957 A GB 3871957A GB 846783 A GB846783 A GB 846783A
Authority
GB
United Kingdom
Prior art keywords
prop
dec
relating
pit
hydraulic
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
GB38719/57A
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.)
EBERHARD VON CAMPENHAUSEN
WILLY EGGEMANN
Original Assignee
EBERHARD VON CAMPENHAUSEN
WILLY EGGEMANN
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 EBERHARD VON CAMPENHAUSEN, WILLY EGGEMANN filed Critical EBERHARD VON CAMPENHAUSEN
Publication of GB846783A publication Critical patent/GB846783A/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)
  • Actuator (AREA)

Abstract

846,783. Hydraulic pit props. EGGEMANN, W., and CAMPENHAUSEN, von E. [trading as SCHWARZ KOMM-GES., H.]. Dec. 13, 1957 [Dec. 27, 1956] No. 38719/57 Class 20(2) In an hydraulic telescopic pit prop the inner piston member 11 of the prop closes the opening to the relief valve 17 which is thus rendered inoperative before the prop is fully collapsed thus leaving a buffer of liquid to prevent the piston engaging the bottom of the cylinder under mine roof pressure and rendering the prop irrecoverable and a manually operated valve 14 is opened to complete the collapse.
GB38719/57A 1956-12-27 1957-12-13 Improvements in or relating to mine supports Expired GB846783A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE846783X 1956-12-27

Publications (1)

Publication Number Publication Date
GB846783A true GB846783A (en) 1960-08-31

Family

ID=6775154

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38719/57A Expired GB846783A (en) 1956-12-27 1957-12-13 Improvements in or relating to mine supports

Country Status (3)

Country Link
BE (1) BE563275A (en)
FR (1) FR1188397A (en)
GB (1) GB846783A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2636791A1 (en) * 1975-09-09 1977-03-17 Voest Ag HYDRAULIC PIT STAMP
CN113006837A (en) * 2021-02-03 2021-06-22 陕西陕煤韩城矿业有限公司 Modular single hydraulic prop

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL251933A (en) * 1959-07-03
DE1156735B (en) * 1960-05-03 1963-11-07 Kloeckner Werke Ag Hydraulic pit ram

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2636791A1 (en) * 1975-09-09 1977-03-17 Voest Ag HYDRAULIC PIT STAMP
CN113006837A (en) * 2021-02-03 2021-06-22 陕西陕煤韩城矿业有限公司 Modular single hydraulic prop

Also Published As

Publication number Publication date
FR1188397A (en) 1959-09-22
BE563275A (en)

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