FR1162002A - Adjustable release device for hydraulic props - Google Patents

Adjustable release device for hydraulic props

Info

Publication number
FR1162002A
FR1162002A FR1162002DA FR1162002A FR 1162002 A FR1162002 A FR 1162002A FR 1162002D A FR1162002D A FR 1162002DA FR 1162002 A FR1162002 A FR 1162002A
Authority
FR
France
Prior art keywords
release device
hydraulic props
adjustable release
adjustable
props
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
Other languages
French (fr)
Inventor
Bernard Tebb
Clarence Herbert Perry
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.)
Mastabar Mining Equipment Co Ltd
Original Assignee
Mastabar Mining Equipment Co Ltd
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 Mastabar Mining Equipment Co Ltd filed Critical Mastabar Mining Equipment Co Ltd
Application granted granted Critical
Publication of FR1162002A publication Critical patent/FR1162002A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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 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 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 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)
  • Emergency Lowering Means (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Safety Valves (AREA)
  • Control Of Presses (AREA)
  • Actuator (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
FR1162002D 1955-06-10 1956-12-06 Adjustable release device for hydraulic props Expired FR1162002A (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
FR1162002A true FR1162002A (en) 1958-09-08

Family

ID=10084401

Family Applications (2)

Application Number Title Priority Date Filing Date
FR1151305D Expired FR1151305A (en) 1955-06-10 1956-06-08 prop, especially for use in coal mines
FR1162002D Expired FR1162002A (en) 1955-06-10 1956-12-06 Adjustable release device for hydraulic props

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR1151305D Expired FR1151305A (en) 1955-06-10 1956-06-08 prop, especially for use in coal mines

Country Status (5)

Country Link
US (1) US2895454A (en)
BE (2) BE553227A (en)
DE (2) DE1063554B (en)
FR (2) FR1151305A (en)
GB (2) GB793803A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012164222A1 (en) 2011-05-30 2012-12-06 Prestige Solaire Motorized rotational drive system for a solar collector tracker support system

Families Citing this family (7)

* 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
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
BE486663A (en) * 1948-01-12
GB636568A (en) * 1953-07-20 1950-05-03 George Herbert Dowty Improvements in pit props and other telescopic struts
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012164222A1 (en) 2011-05-30 2012-12-06 Prestige Solaire Motorized rotational drive system for a solar collector tracker support system

Also Published As

Publication number Publication date
BE553227A (en)
BE548513A (en)
GB802803A (en) 1958-10-15
DE1064907B (en) 1959-09-10
FR1151305A (en) 1958-01-29
GB793803A (en) 1958-04-23
US2895454A (en) 1959-07-21
DE1063554B (en) 1959-08-20

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