GB1405387A - Telescopic boom - Google Patents

Telescopic boom

Info

Publication number
GB1405387A
GB1405387A GB4300773A GB4300773A GB1405387A GB 1405387 A GB1405387 A GB 1405387A GB 4300773 A GB4300773 A GB 4300773A GB 4300773 A GB4300773 A GB 4300773A GB 1405387 A GB1405387 A GB 1405387A
Authority
GB
United Kingdom
Prior art keywords
section
cylinder
trunnion
sept
control valve
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
GB4300773A
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
Publication of GB1405387A publication Critical patent/GB1405387A/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)

Abstract

1405387 Telescopic booms HARNISCHFEGER CORP 13 Sept 1973 [18 Sept 1972] 43007/73 Heading B8B A hollow, telescopic boom, for example on a crane, Fig. 1 (not shown), comprises a base section 20, inner mid section 21, intermediate mid section 22, outer mid section 23, fly section 24 and a manual section 25, respectively extended and retracted by corresponding cylinders 41, 42, 43, 44, 45, of identical construction (apart from size). The cylinder 43 has a trunnion 68 by which it is connected to a trunnion mount 69 on section 23, its cylinder rod 52 having a trunnion 70 by which it is connected to a trunnion mount 71 on section 22. The rod 52 of the cylinder 43 has a remotely operable control valve 67 connected by an hydraulic fluid hose 149C to adjacent control valve 67C on cylinder 44 and arranged in a loop within section 23. Fig. 9 (not shown) illustrates the hydraulic control circuit. The cylinders 41 to 45 are progressively smaller in size.
GB4300773A 1972-09-18 1973-09-13 Telescopic boom Expired GB1405387A (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
GB1405387A true GB1405387A (en) 1975-09-10

Family

ID=23114037

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4300773A Expired GB1405387A (en) 1972-09-18 1973-09-13 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
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
CA976917A (en) 1975-10-28
IT994275B (en) 1975-10-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees