GB904034A - Improvements in and relating to pit props - Google Patents

Improvements in and relating to pit props

Info

Publication number
GB904034A
GB904034A GB4201458A GB4201458A GB904034A GB 904034 A GB904034 A GB 904034A GB 4201458 A GB4201458 A GB 4201458A GB 4201458 A GB4201458 A GB 4201458A GB 904034 A GB904034 A GB 904034A
Authority
GB
United Kingdom
Prior art keywords
cylinder
piston
prop
clamping
pressure
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
GB4201458A
Other languages
English (en)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB904034A publication Critical patent/GB904034A/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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
    • E21D15/588—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded the lock also being activated
    • 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
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/30—Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber
    • E21D15/306—Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber by means of a liquid

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)
  • Press Drives And Press Lines (AREA)
  • Clamps And Clips (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
GB4201458A 1957-12-30 1958-12-30 Improvements in and relating to pit props Expired GB904034A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG23637A DE1143172B (de) 1957-12-30 1957-12-30 Hydraulisch zu setzender und zu verspannender Grubenstempel

Publications (1)

Publication Number Publication Date
GB904034A true GB904034A (en) 1962-08-22

Family

ID=7122237

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4201458A Expired GB904034A (en) 1957-12-30 1958-12-30 Improvements in and relating to pit props

Country Status (3)

Country Link
BE (1) BE574256A (de)
DE (1) DE1143172B (de)
GB (1) GB904034A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1215635B (de) * 1963-11-29 1966-05-05 Rheinstahl Gmbh Wanheim Reibungsstempel mit hydraulischer Setz- und Spannvorrichtung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE525116A (de) *
DE810863C (de) * 1947-05-28 1951-08-13 Eduard Koster Schloss fuer eiserne Grubenstempel
DE811107C (de) * 1950-01-17 1951-08-16 Beschlagfabrik Benninghoven Grubenstempel, bestehend aus zwei ineinanderschiebbaren Rohren
DE1009139B (de) * 1955-12-30 1957-05-29 Hermann Schwarz Kommanditgesel Zweiteiliger metallischer Grubenstempel mit einer durch Reibungsschluss unter elastischer Verformung erfolgenden Verspannung der Stempelteile und Verfahren zum Setzen

Also Published As

Publication number Publication date
DE1143172B (de) 1963-02-07
BE574256A (fr) 1959-04-16

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