BE553227A - - Google Patents

Info

Publication number
BE553227A
BE553227A BE553227DA BE553227A BE 553227 A BE553227 A BE 553227A BE 553227D A BE553227D A BE 553227DA BE 553227 A BE553227 A BE 553227A
Authority
BE
Belgium
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 BE553227A publication Critical patent/BE553227A/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
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/22—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with member, pin, cross- piece, or the like, ruptured, sheared through, or permanently deformed upon excessive pressure
    • 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
    • E21D15/44—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
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
  • Emergency Lowering Means (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Actuator (AREA)
  • Control Of Presses (AREA)
  • Safety Valves (AREA)
BE553227D 1955-06-10 BE553227A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB16827/55A GB793803A (en) 1955-06-10 1955-06-10 Improvements in or relating to props, especially for use in coal mines

Publications (1)

Publication Number Publication Date
BE553227A true BE553227A (en)

Family

ID=10084401

Family Applications (2)

Application Number Title Priority Date Filing Date
BE553227D BE553227A (en) 1955-06-10
BE548513D BE548513A (en) 1955-06-10

Family Applications After (1)

Application Number Title Priority Date Filing Date
BE548513D BE548513A (en) 1955-06-10

Country Status (5)

Country Link
US (1) US2895454A (en)
BE (2) BE548513A (en)
DE (2) DE1063554B (en)
FR (2) FR1151305A (en)
GB (2) GB793803A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB894292A (en) * 1957-07-30 1962-04-18 Mastabar Mining Equip Co Ltd Improvements in or relating to hydraulic props, particularly pit props
GB898987A (en) * 1960-04-19 1962-06-20 Mastabar Mining Equip Co Ltd Improvements in or relating to hydraulic supports
US3112705A (en) * 1961-10-05 1963-12-03 Jane Wallen Two-speed hydraulic pumps
NL299412A (en) * 1962-10-19
US3394634A (en) * 1966-10-21 1968-07-30 George M. Pfundt Internal relief valve for hydrauli cally actuated pole pullers
US3476019A (en) * 1967-09-08 1969-11-04 Berg Mfg & Sales Co Air-assisted emergency spring brake assembly
FR2976058B1 (en) 2011-05-30 2013-07-05 Prestige Solaire MOTORIZED ROTATION DRIVE SYSTEM FOR FOLLOWING SUPPORT SYSTEM FOR SOLAR SENSOR
CN111594235B (en) * 2020-04-22 2021-06-18 山东科技大学 Buffer type mining supporting equipment and supporting method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2618122A (en) * 1946-04-18 1952-11-18 Gratzmuller Jean Louis Telescopic hydraulic jack
GB636568A (en) * 1953-07-20 1950-05-03 George Herbert Dowty Improvements in pit props and other telescopic struts
BE486663A (en) * 1948-01-12
GB640414A (en) * 1948-03-06 1950-07-19 Mavor & Coulson Ltd Improvements in props
DE928945C (en) * 1951-06-09 1955-06-16 Eisenwerk Wanheim G M B H Adjustable hydraulic pit ram
GB700790A (en) * 1951-07-19 1953-12-09 Dowty Auto Units Ltd Improvements relating to valves
DE950183C (en) * 1953-02-26 1956-10-04 August Bilstein G M B H Hydraulic lifting device, in particular for setting pit punches
BE532039A (en) * 1953-09-24 1900-01-01

Also Published As

Publication number Publication date
DE1063554B (en) 1959-08-20
US2895454A (en) 1959-07-21
DE1064907B (en) 1959-09-10
FR1162002A (en) 1958-09-08
BE548513A (en)
GB802803A (en) 1958-10-15
GB793803A (en) 1958-04-23
FR1151305A (en) 1958-01-29

Similar Documents

Publication Publication Date Title
AT198143B (en)
AT198671B (en)
AT195882B (en)
AT195787B (en)
AT194860B (en)
AT197696B (en)
AT195202B (en)
AT198478B (en)
AT197742B (en)
AT195857B (en)
AT197645B (en)
AT195570B (en)
AT195858B (en)
AT196487B (en)
AT195705B (en)
AT196488B (en)
AT196599B (en)
AT196671B (en)
AT196795B (en)
AT197113B (en)
AT195450B (en)
AT198439B (en)
AT198360B (en)
AT198283B (en)
AT198281B (en)