NL299412A - - Google Patents

Info

Publication number
NL299412A
NL299412A NL299412DA NL299412A NL 299412 A NL299412 A NL 299412A NL 299412D A NL299412D A NL 299412DA NL 299412 A NL299412 A NL 299412A
Authority
NL
Netherlands
Application number
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.)
Publication of NL299412A publication Critical patent/NL299412A/xx

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
    • E21D15/28—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
    • 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
    • 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
    • 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
    • E21D15/55—Details of the ends of props of prop heads or feet

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)
  • Holders For Apparel And Elements Relating To Apparel (AREA)
  • Earth Drilling (AREA)
NL299412D 1962-10-19 NL299412A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB39568/62A GB1034334A (en) 1962-10-19 1962-10-19 Telescopic pit prop

Publications (1)

Publication Number Publication Date
NL299412A true NL299412A (fr)

Family

ID=10410251

Family Applications (1)

Application Number Title Priority Date Filing Date
NL299412D NL299412A (fr) 1962-10-19

Country Status (5)

Country Link
US (1) US3220686A (fr)
BE (1) BE638885A (fr)
GB (1) GB1034334A (fr)
LU (1) LU44628A1 (fr)
NL (1) NL299412A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112064724A (zh) * 2020-09-05 2020-12-11 马海平 一种消防栓的收缩隐蔽及自伸展喷射装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB742118A (en) * 1953-01-24 1955-12-21 Dowty Hydraulic Units Ltd Improvements in hydraulic pit props
BE553227A (fr) * 1955-06-10
DE1023436B (de) * 1955-11-24 1958-01-30 Hermann Schwarz Kommanditgesel Hydraulischer Grubenstempel
GB815577A (en) * 1956-05-01 1959-07-01 Dowty Mining Equipment Ltd Improvements in manual controls for hydraulic pit props
GB851766A (en) * 1957-05-02 1960-10-19 Gerlach Karl An improved hydraulic pit prop
FR1208498A (fr) * 1957-06-15 1960-02-24 Serrure pour étançons de mine en plusieurs parties
BE635504A (fr) * 1958-02-17
GB901168A (en) * 1959-02-23 1962-07-18 Dowty Mining Equipment Ltd Improvements in hydraulic props or struts
GB904795A (en) * 1959-09-08 1962-08-29 Dowty Mining Equipment Ltd Improvements relating to hydraulic pit props

Also Published As

Publication number Publication date
US3220686A (en) 1965-11-30
GB1034334A (en) 1966-06-29
BE638885A (fr)
LU44628A1 (fr) 1963-12-16

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