GB802804A - Improvements in or relating to hydraulic pit props - Google Patents

Improvements in or relating to hydraulic pit props

Info

Publication number
GB802804A
GB802804A GB35219/55A GB3521955A GB802804A GB 802804 A GB802804 A GB 802804A GB 35219/55 A GB35219/55 A GB 35219/55A GB 3521955 A GB3521955 A GB 3521955A GB 802804 A GB802804 A GB 802804A
Authority
GB
United Kingdom
Prior art keywords
prop
hydraulic
hydraulic pit
mastabar
high 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
GB35219/55A
Other languages
English (en)
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
Priority to BE553228D priority Critical patent/BE553228A/xx
Application filed by Mastabar Mining Equipment Co Ltd filed Critical Mastabar Mining Equipment Co Ltd
Priority to GB35219/55A priority patent/GB802804A/en
Priority to DEM32499A priority patent/DE1054402B/de
Priority to FR1164647D priority patent/FR1164647A/fr
Publication of GB802804A publication Critical patent/GB802804A/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
    • E21D15/14—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/18—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the effective cross-section of the working surface of the piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/14—Pumps characterised by muscle-power operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Transmissions By Endless Flexible Members (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Actuator (AREA)
  • Details Of Reciprocating Pumps (AREA)
GB35219/55A 1955-12-08 1955-12-08 Improvements in or relating to hydraulic pit props Expired GB802804A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE553228D BE553228A (enrdf_load_stackoverflow) 1955-12-08
GB35219/55A GB802804A (en) 1955-12-08 1955-12-08 Improvements in or relating to hydraulic pit props
DEM32499A DE1054402B (de) 1955-12-08 1956-11-29 Hydraulische Grubenstuetze
FR1164647D FR1164647A (fr) 1955-12-08 1956-12-06 Pompe à deux étages pour étançon hydraulique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB35219/55A GB802804A (en) 1955-12-08 1955-12-08 Improvements in or relating to hydraulic pit props

Publications (1)

Publication Number Publication Date
GB802804A true GB802804A (en) 1958-10-15

Family

ID=10375225

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35219/55A Expired GB802804A (en) 1955-12-08 1955-12-08 Improvements in or relating to hydraulic pit props

Country Status (4)

Country Link
BE (1) BE553228A (enrdf_load_stackoverflow)
DE (1) DE1054402B (enrdf_load_stackoverflow)
FR (1) FR1164647A (enrdf_load_stackoverflow)
GB (1) GB802804A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110307021A (zh) * 2019-07-29 2019-10-08 石家庄博安煤矿机械制造有限公司 一种煤矿用液压支撑装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB962542A (en) * 1959-08-21 1964-07-01 Acrow Eng Ltd Improvements in and relating to hydraulic props

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE526791A (enrdf_load_stackoverflow) * 1953-02-25
NL191038A (enrdf_load_stackoverflow) * 1953-09-24 1900-01-01

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110307021A (zh) * 2019-07-29 2019-10-08 石家庄博安煤矿机械制造有限公司 一种煤矿用液压支撑装置
CN110307021B (zh) * 2019-07-29 2024-01-12 石家庄博安煤矿机械制造有限公司 一种煤矿用液压支撑装置

Also Published As

Publication number Publication date
BE553228A (enrdf_load_stackoverflow)
DE1054402B (de) 1959-04-09
FR1164647A (fr) 1958-10-13

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