GB706982A - Improvements in or relating to hydraulic props and jacks, especially pit props - Google Patents

Improvements in or relating to hydraulic props and jacks, especially pit props

Info

Publication number
GB706982A
GB706982A GB199851A GB199851A GB706982A GB 706982 A GB706982 A GB 706982A GB 199851 A GB199851 A GB 199851A GB 199851 A GB199851 A GB 199851A GB 706982 A GB706982 A GB 706982A
Authority
GB
United Kingdom
Prior art keywords
props
jacks
relating
hydraulic
packing
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
GB199851A
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.)
RICHARD GEORGE CABLE
Original Assignee
RICHARD GEORGE CABLE
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 RICHARD GEORGE CABLE filed Critical RICHARD GEORGE CABLE
Priority to GB199851A priority Critical patent/GB706982A/en
Publication of GB706982A publication Critical patent/GB706982A/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
    • E21D15/54—Details of the ends of props
    • 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
    • E21D15/512—Arrangement of valves

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)
  • Reinforcement Elements For Buildings (AREA)

Abstract

706,982. Piston packing. CABLE, R. G. Aug. 16, 1951 [Jan. 26, 1951], No. 1998/51. Class 122(1) [Also in Groups X and XXX] In an hydraulic pit prop the ram head 7 has a packing comprising a partly divided packing ring 23 expanded against the wall of the cylinder 1 by a wedge ring 24 held in place by a clamping plate 25 fixed by screws to the ram head.
GB199851A 1951-01-26 1951-01-26 Improvements in or relating to hydraulic props and jacks, especially pit props Expired GB706982A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB199851A GB706982A (en) 1951-01-26 1951-01-26 Improvements in or relating to hydraulic props and jacks, especially pit props

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB199851A GB706982A (en) 1951-01-26 1951-01-26 Improvements in or relating to hydraulic props and jacks, especially pit props

Publications (1)

Publication Number Publication Date
GB706982A true GB706982A (en) 1954-04-07

Family

ID=9731812

Family Applications (1)

Application Number Title Priority Date Filing Date
GB199851A Expired GB706982A (en) 1951-01-26 1951-01-26 Improvements in or relating to hydraulic props and jacks, especially pit props

Country Status (1)

Country Link
GB (1) GB706982A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1148511B (en) * 1960-05-02 1963-05-16 Ewald Wiemann Maschf Valve for hydraulic support devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1148511B (en) * 1960-05-02 1963-05-16 Ewald Wiemann Maschf Valve for hydraulic support devices

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