BE519365A - - Google Patents

Info

Publication number
BE519365A
BE519365A BE519365DA BE519365A BE 519365 A BE519365 A BE 519365A BE 519365D A BE519365D A BE 519365DA BE 519365 A BE519365 A BE 519365A
Authority
BE
Belgium
Prior art keywords
rack
column
pawls
jack according
bearing
Prior art date
Application number
Other languages
English (en)
French (fr)
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 BE519365A publication Critical patent/BE519365A/fr

Links

Classifications

    • 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
    • B66F1/00—Devices, e.g. jacks, for lifting loads in predetermined steps
    • B66F1/02—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts
    • B66F1/04—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed
    • B66F1/06—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed and the devices being actuated mechanically
    • 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
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/20—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like, spaced apart at intervals
    • 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
    • E21D15/54—Details of the ends of props
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00—Transport specially adapted to underground conditions
    • E21F13/08—Shifting conveyors or other transport devices from one location at the working face to another
    • E21F13/086—Armoured conveyors shifting devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1558—Grip units and features
    • Y10T74/1587—Grip features
    • Y10T74/1598—Driven ratchet-bar and power dog

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Jib Cranes (AREA)
BE519365D 1952-06-16 1953-04-21 BE519365A (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15119/52A GB728146A (en) 1952-06-16 1952-06-16 Improved jack device

Publications (1)

Publication Number Publication Date
BE519365A true BE519365A (es) 1955-04-15

Family

ID=10053368

Family Applications (1)

Application Number Title Priority Date Filing Date
BE519365D BE519365A (es) 1952-06-16 1953-04-21

Country Status (4)

Country Link
US (1) US2723104A (es)
BE (1) BE519365A (es)
FR (1) FR1080048A (es)
GB (1) GB728146A (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2948508A (en) * 1957-03-15 1960-08-09 Dowty Mining Equipment Ltd Pushing device for shifting mining machinery
CN103485806B (zh) * 2013-09-24 2015-12-23 三一重型装备有限公司 液压支架及其侧推机构

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US503437A (en) * 1893-08-15 Brace
US56111A (en) * 1866-07-03 Improvement in lifting-jacks
US826124A (en) * 1905-09-02 1906-07-17 John D Soseman Means for splicing telegraph, telephone, and other poles.
US1439677A (en) * 1919-04-02 1922-12-19 Sullivan Machinery Co Mining-machine jack
US1741134A (en) * 1927-02-01 1929-12-24 Sullivan Machinery Co Mining machine
US1883767A (en) * 1927-08-26 1932-10-18 Crewe Samuel Ratchet mechanism
US1835515A (en) * 1930-04-21 1931-12-08 William V O'bryan Jack knife mine post
BE502813A (es) * 1950-04-26
US2675256A (en) * 1951-01-19 1954-04-13 James S Cornell Telescopic structure

Also Published As

Publication number Publication date
GB728146A (en) 1955-04-13
US2723104A (en) 1955-11-08
FR1080048A (fr) 1954-12-06

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