GB835142A - Improvements relating to roof supports for mine workings - Google Patents

Improvements relating to roof supports for mine workings

Info

Publication number
GB835142A
GB835142A GB1215157A GB1215157A GB835142A GB 835142 A GB835142 A GB 835142A GB 1215157 A GB1215157 A GB 1215157A GB 1215157 A GB1215157 A GB 1215157A GB 835142 A GB835142 A GB 835142A
Authority
GB
United Kingdom
Prior art keywords
support
liquid
valve
roof supports
april
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
GB1215157A
Other languages
English (en)
Inventor
Angus Wellesley Duncan
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.)
Mining Engineering Co Ltd MECO
Original Assignee
Mining Engineering Co Ltd MECO
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 Mining Engineering Co Ltd MECO filed Critical Mining Engineering Co Ltd MECO
Priority to GB1215157A priority Critical patent/GB835142A/en
Priority to GB1712058A priority patent/GB900309A/en
Priority to FR1196543D priority patent/FR1196543A/fr
Priority to DEM37861A priority patent/DE1150639B/de
Priority to BE568355A priority patent/BE568355A/xx
Priority to NL228461A priority patent/NL112444C/xx
Priority to US740813A priority patent/US2985419A/en
Publication of GB835142A publication Critical patent/GB835142A/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
    • 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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
    • E21D15/587—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded by means of power accumulators to be pre-charged by rock pressure

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)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
GB1215157A 1957-04-13 1957-04-13 Improvements relating to roof supports for mine workings Expired GB835142A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB1215157A GB835142A (en) 1957-04-13 1957-04-13 Improvements relating to roof supports for mine workings
GB1712058A GB900309A (en) 1957-04-13 1958-05-29 Roof-support for mine workings and the like
FR1196543D FR1196543A (fr) 1957-04-13 1958-06-02 Dispositif de soutènement du toit pour exploitations minières
DEM37861A DE1150639B (de) 1957-04-13 1958-06-04 Nachgiebige Tragvorrichtung fuer den Bergbau
BE568355A BE568355A (enrdf_load_html_response) 1957-04-13 1958-06-05
NL228461A NL112444C (enrdf_load_html_response) 1957-04-13 1958-06-05
US740813A US2985419A (en) 1957-04-13 1958-06-09 Roof supports for mine workings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1215157A GB835142A (en) 1957-04-13 1957-04-13 Improvements relating to roof supports for mine workings

Publications (1)

Publication Number Publication Date
GB835142A true GB835142A (en) 1960-05-18

Family

ID=9999281

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1215157A Expired GB835142A (en) 1957-04-13 1957-04-13 Improvements relating to roof supports for mine workings

Country Status (4)

Country Link
BE (1) BE568355A (enrdf_load_html_response)
FR (1) FR1196543A (enrdf_load_html_response)
GB (1) GB835142A (enrdf_load_html_response)
NL (1) NL112444C (enrdf_load_html_response)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202061A (en) * 1962-07-09 1965-08-24 Lowell B Johnston Fluid actuated displacement and positioning system
US4572579A (en) * 1983-12-19 1986-02-25 Ken Saito Dump apparatus
US5446938A (en) * 1993-10-04 1995-09-05 Kelley Company Inc. Bag construction for a dockleveler
US5450643A (en) * 1993-10-04 1995-09-19 Kelley Company Inc. Edge-of-dock leveler
US5471693A (en) * 1993-10-04 1995-12-05 Kelley Company Inc. Support and attachment mechanism for a dockleveler lift bag
US5475888A (en) * 1995-01-31 1995-12-19 Kelley Company, Inc. Lip lifting mechanism for a dock leveler
US5481774A (en) * 1993-10-04 1996-01-09 Kelley Company, Inc. Support mechanism for a dockleveler lift bag
US5500968A (en) * 1991-12-26 1996-03-26 Kelley Company, Inc. Dock leveler incorporating an inflatable bag
US5522108A (en) * 1995-01-31 1996-06-04 Kelley Company, Inc. Dock leveler having a ramp movable to a raised position by inflation of an inflatable member, with a filler for occupying volume within the inflatable member
US5600859A (en) * 1995-01-31 1997-02-11 Kelley Company, Inc. Dock leveler in which the ramp is raised and lowered using an inflatable member and method of use
US5802650A (en) * 1993-10-04 1998-09-08 Kelley Company, Inc. Dock leveler having an inflatable member
US5996156A (en) * 1995-01-31 1999-12-07 Kelley Company, Inc. Dock leveler raised by deflating an inflatable member
US6460212B2 (en) 1993-10-04 2002-10-08 Kelley Company, Inc. Dock leveler having an inflatable member
US6711774B2 (en) 1993-10-04 2004-03-30 Kelley Company, Inc. Dock leveler having an inflatable member
USRE39404E1 (en) 1989-03-07 2006-11-21 Spx Dock Products, Inc. Movable loading bridge having an inflatable flexible body
US7503089B2 (en) 2005-04-05 2009-03-17 Rite-Hite Holding Corporation Inflatable actuator for a dock leveler deck

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202061A (en) * 1962-07-09 1965-08-24 Lowell B Johnston Fluid actuated displacement and positioning system
US4572579A (en) * 1983-12-19 1986-02-25 Ken Saito Dump apparatus
USRE39404E1 (en) 1989-03-07 2006-11-21 Spx Dock Products, Inc. Movable loading bridge having an inflatable flexible body
US5500968A (en) * 1991-12-26 1996-03-26 Kelley Company, Inc. Dock leveler incorporating an inflatable bag
US6711774B2 (en) 1993-10-04 2004-03-30 Kelley Company, Inc. Dock leveler having an inflatable member
US6460212B2 (en) 1993-10-04 2002-10-08 Kelley Company, Inc. Dock leveler having an inflatable member
US5481774A (en) * 1993-10-04 1996-01-09 Kelley Company, Inc. Support mechanism for a dockleveler lift bag
US5471693A (en) * 1993-10-04 1995-12-05 Kelley Company Inc. Support and attachment mechanism for a dockleveler lift bag
US5446938A (en) * 1993-10-04 1995-09-05 Kelley Company Inc. Bag construction for a dockleveler
US6910239B2 (en) 1993-10-04 2005-06-28 Kelly Company, Inc. Dock leveler having an inflatable member
US5621938A (en) * 1993-10-04 1997-04-22 Kelley Company, Inc. Edge-of-dock leveler and method of making
US5651155A (en) * 1993-10-04 1997-07-29 Kelley Company, Inc. Support mechanism for a dockleveler lift bag
US5802650A (en) * 1993-10-04 1998-09-08 Kelley Company, Inc. Dock leveler having an inflatable member
US6760944B2 (en) 1993-10-04 2004-07-13 Kelley Company, Inc. Dock leveler having an inflatable member
US5450643A (en) * 1993-10-04 1995-09-19 Kelley Company Inc. Edge-of-dock leveler
US5475888A (en) * 1995-01-31 1995-12-19 Kelley Company, Inc. Lip lifting mechanism for a dock leveler
US5996156A (en) * 1995-01-31 1999-12-07 Kelley Company, Inc. Dock leveler raised by deflating an inflatable member
US5600859A (en) * 1995-01-31 1997-02-11 Kelley Company, Inc. Dock leveler in which the ramp is raised and lowered using an inflatable member and method of use
US5522108A (en) * 1995-01-31 1996-06-04 Kelley Company, Inc. Dock leveler having a ramp movable to a raised position by inflation of an inflatable member, with a filler for occupying volume within the inflatable member
US7503089B2 (en) 2005-04-05 2009-03-17 Rite-Hite Holding Corporation Inflatable actuator for a dock leveler deck

Also Published As

Publication number Publication date
NL112444C (enrdf_load_html_response) 1966-02-15
BE568355A (enrdf_load_html_response) 1958-06-30
FR1196543A (fr) 1959-11-24

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