GB720383A - Improvements in or relating to hydraulic pit props, chocks and like hydraulic miningappliances, hydraulic jacks and the like - Google Patents

Improvements in or relating to hydraulic pit props, chocks and like hydraulic miningappliances, hydraulic jacks and the like

Info

Publication number
GB720383A
GB720383A GB1337552A GB1337552A GB720383A GB 720383 A GB720383 A GB 720383A GB 1337552 A GB1337552 A GB 1337552A GB 1337552 A GB1337552 A GB 1337552A GB 720383 A GB720383 A GB 720383A
Authority
GB
United Kingdom
Prior art keywords
hydraulic
miningappliances
chocks
relating
jacks
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
GB1337552A
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.)
Gullick Ltd
Original Assignee
Gullick 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 Gullick Ltd filed Critical Gullick Ltd
Publication of GB720383A publication Critical patent/GB720383A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/30—Constructional features with positive brakes or locks
    • 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
    • E21D15/48—Chocks or the like
    • E21D15/486—Chocks or the like with essential hydraulic or pneumatic details
    • 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
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/517—Extension elements
    • 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
    • E21D15/52—Extensible units located above or below standard props
    • E21D15/523—Extensible units located above or below standard props with hydraulic or pneumatic control
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/04—Cantilever extension or similar protecting devices for use in longwall working

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Control Of Turbines (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Operation Control Of Excavators (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

720,383. Hydraulic jacks. GULLICK, Ltd., and SEAMAN, T. Feb. 15, 1951 [Nov. 14, 1950], No. 13375/52. Divided out of 720,361. Drawings to Specification. Class 78 (3). [Also in Group X] The subject-matter of this Specification is identical with that described in Specification 720,361 except for the omission of a modification, but the claims differ. Specification 682,671, [Group XXIX], also is referred to.
GB1337552A 1952-11-22 1950-11-14 Improvements in or relating to hydraulic pit props, chocks and like hydraulic miningappliances, hydraulic jacks and the like Expired GB720383A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2956552A GB746178A (en) 1952-11-22 1952-11-22 Improvements in or relating to pit props and the like

Publications (1)

Publication Number Publication Date
GB720383A true GB720383A (en) 1954-12-15

Family

ID=10293532

Family Applications (3)

Application Number Title Priority Date Filing Date
GB395050A Expired GB720361A (en) 1952-11-22 1950-02-16 Improvements in or relating to hydraulic pit props, hydraulic jacks and the like
GB1337552A Expired GB720383A (en) 1952-11-22 1950-11-14 Improvements in or relating to hydraulic pit props, chocks and like hydraulic miningappliances, hydraulic jacks and the like
GB2956552A Expired GB746178A (en) 1951-05-01 1952-11-22 Improvements in or relating to pit props and the like

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB395050A Expired GB720361A (en) 1952-11-22 1950-02-16 Improvements in or relating to hydraulic pit props, hydraulic jacks and the like

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2956552A Expired GB746178A (en) 1951-05-01 1952-11-22 Improvements in or relating to pit props and the like

Country Status (1)

Country Link
GB (3) GB720361A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1127841B (en) * 1955-08-13 1962-04-19 Kronprinz Ag Hydraulic pit ram
DE1023436B (en) * 1955-11-24 1958-01-30 Hermann Schwarz Kommanditgesel Hydraulic pit ram
FR1492817A (en) * 1965-12-22 1967-08-25 Improvements to relief valves and caving devices for hydraulic mine props
US4142449A (en) * 1976-02-03 1979-03-06 Thyssen Industrie Ag Hydraulic mine prop
GB2069048B (en) * 1980-01-21 1984-06-06 Commercial Shearing Longwall jacks
CN103184879B (en) * 2012-01-01 2017-11-17 李立华 A kind of gib erecting by overhang

Also Published As

Publication number Publication date
GB720361A (en) 1954-12-15
GB746178A (en) 1956-03-14

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