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CA946820A - Jack assemblies - Google Patents

Jack assemblies

Info

Publication number
CA946820A
CA946820A CA074,516A CA74516A CA946820A CA 946820 A CA946820 A CA 946820A CA 74516 A CA74516 A CA 74516A CA 946820 A CA946820 A CA 946820A
Authority
CA
Canada
Prior art keywords
jack assemblies
jack
assemblies
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
CA074,516A
Other versions
CA74516S (en
Inventor
Nils H. Ahlgren
Odd Jahr
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 CA946820A publication Critical patent/CA946820A/en
Expired legal-status Critical Current

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
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Jigs For Machine Tools (AREA)
CA074,516A 1969-02-21 1970-02-11 Jack assemblies Expired CA946820A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE241269A SE317791B (en) 1969-02-21 1969-02-21

Publications (1)

Publication Number Publication Date
CA946820A true CA946820A (en) 1974-05-07

Family

ID=20259909

Family Applications (1)

Application Number Title Priority Date Filing Date
CA074,516A Expired CA946820A (en) 1969-02-21 1970-02-11 Jack assemblies

Country Status (6)

Country Link
JP (1) JPS5026822B1 (en)
CA (1) CA946820A (en)
DE (1) DE1961283A1 (en)
FR (1) FR2030441A1 (en)
GB (1) GB1297777A (en)
SE (1) SE317791B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE354635B (en) * 1972-01-12 1973-03-19 N Ahlgren
USRE31206E (en) * 1972-01-12 1983-04-12 Method of lowering and raising loads by means of a jack assembly and lifting element
AT388418B (en) * 1984-04-24 1989-06-26 Upravlewnie Montazhu Demontazh Hydraulic power mechanism
CN1332873C (en) * 2005-07-08 2007-08-22 花周建 Anti-falling feed-through type hydraulic lifting and descending jack
US8322687B2 (en) 2008-04-22 2012-12-04 Lift Systems, Inc. Integrated wedge lock arrangement
CN103332637B (en) * 2013-03-06 2015-07-08 中国电力科学研究院 A steel strand pretensioning device
CN103466501B (en) * 2013-09-10 2015-10-28 中国核工业华兴建设有限公司 A kind of prestressed stretch-draw jack
CN110550569B (en) * 2019-09-03 2020-12-18 郑州大学 A push-pull auxiliary support device

Also Published As

Publication number Publication date
DE1961283A1 (en) 1970-09-10
SE317791B (en) 1969-11-24
GB1297777A (en) 1972-11-29
JPS5026822B1 (en) 1975-09-03
FR2030441A1 (en) 1970-11-13

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