BE568355A - - Google Patents

Info

Publication number
BE568355A
BE568355A BE568355A BE568355A BE568355A BE 568355 A BE568355 A BE 568355A BE 568355 A BE568355 A BE 568355A BE 568355 A BE568355 A BE 568355A BE 568355 A BE568355 A BE 568355A
Authority
BE
Belgium
Application number
BE568355A
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 filed Critical
Publication of BE568355A publication Critical patent/BE568355A/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
    • E21D15/44—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)
BE568355A 1957-04-13 1958-06-05 BE568355A (enrdf_load_stackoverflow)

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
BE568355A true BE568355A (enrdf_load_stackoverflow) 1958-06-30

Family

ID=9999281

Family Applications (1)

Application Number Title Priority Date Filing Date
BE568355A BE568355A (enrdf_load_stackoverflow) 1957-04-13 1958-06-05

Country Status (4)

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

Families Citing this family (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
NL8900557A (nl) 1989-03-07 1990-10-01 Rolflex Oost Nederland Beweegbare laadbrug.
JP2578575B2 (ja) * 1991-12-26 1997-02-05 ケリー カンパニー インコーポレイテッド 膨張可能なバッグを有するドックレベラー
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
US5481774A (en) * 1993-10-04 1996-01-09 Kelley Company, Inc. Support mechanism for a dockleveler lift bag
US6711774B2 (en) 1993-10-04 2004-03-30 Kelley Company, Inc. Dock leveler having an inflatable member
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
US5802650A (en) * 1993-10-04 1998-09-08 Kelley Company, Inc. Dock leveler having 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
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
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_stackoverflow) 1966-02-15
GB835142A (en) 1960-05-18
FR1196543A (fr) 1959-11-24

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