CA942283A - Jacking devices - Google Patents

Jacking devices

Info

Publication number
CA942283A
CA942283A CA113,592A CA113592A CA942283A CA 942283 A CA942283 A CA 942283A CA 113592 A CA113592 A CA 113592A CA 942283 A CA942283 A CA 942283A
Authority
CA
Canada
Prior art keywords
jacking devices
jacking
devices
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
CA113,592A
Other languages
English (en)
Other versions
CA113592S (en
Inventor
Dudley N. Forbes
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA942283A publication Critical patent/CA942283A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/008—Anchoring or tensioning means
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/066—Shores or struts; Chocks telescopic with parts held together by positive means by a wedge
    • 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
    • E21D15/24—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism
    • E21D15/26—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism with screw, worm, or the like, not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Clamps And Clips (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
CA113,592A 1970-05-22 1971-05-21 Jacking devices Expired CA942283A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA703468A ZA703468B (en) 1970-05-22 1970-05-22 Substituted jacking devices

Publications (1)

Publication Number Publication Date
CA942283A true CA942283A (en) 1974-02-19

Family

ID=25562003

Family Applications (1)

Application Number Title Priority Date Filing Date
CA113,592A Expired CA942283A (en) 1970-05-22 1971-05-21 Jacking devices

Country Status (5)

Country Link
US (1) US3706441A (de)
CA (1) CA942283A (de)
DE (1) DE2124675A1 (de)
GB (1) GB1331805A (de)
ZA (1) ZA703468B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2219902B1 (de) * 1973-03-01 1979-04-06 Svenska Rotor Maskiner Ab
GB2362871B (en) * 2000-01-26 2002-08-14 Thomas Finan Quick release jack
CA2416644C (en) * 2003-01-20 2010-07-20 Paul Gillespie Concrete slab form system
EP2787165B1 (de) * 2013-04-04 2016-11-16 Kern Tunneltechnik SA Stützzylinder und Schalungsanordnung mit Stützzylinder
GB2526794B (en) * 2014-06-02 2018-12-05 Ischebeck Titan Ltd An assembly for the controlled release of a compression load

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1794798A (en) * 1927-05-02 1931-03-03 Hiram C Weitzman Jack
US1850489A (en) * 1929-05-10 1932-03-22 Baguley Cyril Prop for use in mines

Also Published As

Publication number Publication date
ZA703468B (en) 1971-11-24
US3706441A (en) 1972-12-19
DE2124675A1 (de) 1971-12-23
GB1331805A (en) 1973-09-26

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