CA976917A - Telescopic boom - Google Patents

Telescopic boom

Info

Publication number
CA976917A
CA976917A CA179,972A CA179972A CA976917A CA 976917 A CA976917 A CA 976917A CA 179972 A CA179972 A CA 179972A CA 976917 A CA976917 A CA 976917A
Authority
CA
Canada
Prior art keywords
telescopic boom
boom
telescopic
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
CA179,972A
Other versions
CA179972S (en
Inventor
James A. Jones
Daniel C. Wiencek
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.)
Harnischfeger Corp
Original Assignee
Harnischfeger Corp
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 Harnischfeger Corp filed Critical Harnischfeger Corp
Application granted granted Critical
Publication of CA976917A publication Critical patent/CA976917A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/12—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
CA179,972A 1972-09-18 1973-08-30 Telescopic boom Expired CA976917A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00289986A US3804262A (en) 1972-09-18 1972-09-18 Telescopic boom

Publications (1)

Publication Number Publication Date
CA976917A true CA976917A (en) 1975-10-28

Family

ID=23114037

Family Applications (1)

Application Number Title Priority Date Filing Date
CA179,972A Expired CA976917A (en) 1972-09-18 1973-08-30 Telescopic boom

Country Status (14)

Country Link
US (1) US3804262A (en)
JP (1) JPS4970359A (en)
BR (1) BR7307240D0 (en)
CA (1) CA976917A (en)
CH (1) CH560648A5 (en)
DD (1) DD106613A5 (en)
DE (1) DE2346004A1 (en)
ES (1) ES418852A1 (en)
FR (1) FR2200184B3 (en)
GB (1) GB1405387A (en)
IT (1) IT994275B (en)
NL (1) NL7312853A (en)
SE (1) SE394102B (en)
ZA (1) ZA737240B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE402003C (en) * 1976-06-23 1982-02-22 Jonsereds Fabrikers Ab DEVICE FOR LOADING DEVICES WITH TELESCOPICALLY EXTENDABLE CRANE ARM AND WITH HYDRAULIC CABLES BORN BY THE CRANE ARM
GB2263270B (en) * 1992-01-20 1995-01-11 D J Ind Ltd Load handling apparatus
SE501102C2 (en) * 1993-04-26 1994-11-14 Hiab Ab Extendable crane arm
US5695082A (en) * 1996-04-08 1997-12-09 Pioneer Engineering Crane having a readily removable outer boom section
DE10003058A1 (en) * 2000-01-25 2001-07-26 Macmoter Spa Pipe layer has jib mounted on turntable on body of machine so that it can swivel about vertical axis
ITTO20030957A1 (en) * 2003-11-28 2005-05-29 Cnh Italia Spa TELESCOPIC LIFT ARM.
NZ581080A (en) * 2007-04-16 2012-03-30 Falck Schmidt Defence Systems As Telescoping mast with gas sping actuators to force sections of the mast apart
ITMO20120312A1 (en) * 2012-12-20 2014-06-20 Cnh Italia Spa TELESCOPIC ARM.
WO2017086844A1 (en) 2015-11-16 2017-05-26 Saab Ab Telescopic device and method for operating a telescopic device
US10889473B2 (en) * 2016-12-09 2021-01-12 Fassi Gru S.P.A. Load crane main boom
US20180273352A1 (en) * 2017-03-22 2018-09-27 Wetherell Mfg Co. Sequential piggyback cylinders for extendable boom crane
DE102017127973A1 (en) 2017-11-27 2019-05-29 Liebherr-Werk Ehingen Gmbh Telescopic boom for a crane and crane with a corresponding telescopic boom
IT201800004537A1 (en) * 2018-04-16 2019-10-16 AERIAL PLATFORM
CN109368512B (en) * 2018-12-25 2024-02-20 西京学院 Pulley block range-extending three-stage electric cylinder

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3300060A (en) * 1965-02-03 1967-01-24 Pettibone Mulliken Corp Booms with sequential hydraulic extension
US3478894A (en) * 1967-11-27 1969-11-18 Jeffrey Galion Inc Extensible and retractable boom construction for cranes
US3481489A (en) * 1967-12-05 1969-12-02 Robert E Stauffer Means for extending and retracting boom sections of a crane
US3489294A (en) * 1968-04-25 1970-01-13 Bucyrus Erie Co Load limit control for hoisting equipment
US3633460A (en) * 1968-12-13 1972-01-11 Tadano Tekkosho Kk Extension means of a multistage extensible boom
US3605561A (en) * 1969-12-22 1971-09-20 Pettibone Corp One handle sequence selecting valving for crowd cylinders
US3658189A (en) * 1970-01-06 1972-04-25 American Hoist & Derrick Co Hydraulic extensible boom structure
US3666125A (en) * 1970-09-10 1972-05-30 Warner Swasey Co Boom assembly
US3708937A (en) * 1970-09-28 1973-01-09 Kidde & Co Walter Trapezoidal telescoping crane boom
US3736710A (en) * 1970-12-03 1973-06-05 Kidde & Co Walter Four-section fully hydraulically operated crane boom having three individually supported single piston rams contained within fly section

Also Published As

Publication number Publication date
DE2346004A1 (en) 1974-03-28
GB1405387A (en) 1975-09-10
BR7307240D0 (en) 1974-06-27
CH560648A5 (en) 1975-04-15
NL7312853A (en) 1974-03-20
JPS4970359A (en) 1974-07-08
FR2200184B3 (en) 1976-08-20
DD106613A5 (en) 1974-06-20
SE394102B (en) 1977-06-06
ZA737240B (en) 1974-10-30
FR2200184A1 (en) 1974-04-19
ES418852A1 (en) 1976-02-16
US3804262A (en) 1974-04-16
IT994275B (en) 1975-10-20

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