US3845866A - Telescopic crane jib - Google Patents

Telescopic crane jib Download PDF

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Publication number
US3845866A
US3845866A US00400652A US40065273A US3845866A US 3845866 A US3845866 A US 3845866A US 00400652 A US00400652 A US 00400652A US 40065273 A US40065273 A US 40065273A US 3845866 A US3845866 A US 3845866A
Authority
US
United States
Prior art keywords
telescopic
bolt
cylinder
parts
crane jib
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 - Lifetime
Application number
US00400652A
Other languages
English (en)
Inventor
H Eucken
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.)
Leo Gottwald KG
Original Assignee
Leo Gottwald KG
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
Priority claimed from DE19722247491 external-priority patent/DE2247491C2/de
Priority claimed from DE19722249309 external-priority patent/DE2249309A1/de
Application filed by Leo Gottwald KG filed Critical Leo Gottwald KG
Application granted granted Critical
Publication of US3845866A publication Critical patent/US3845866A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
    • 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

Definitions

  • the parts are extended and retracted when the jib is vertical by means of a fluid pressure operated cylinder whose piston rod extends downwards from the cylinder and is fixed to the lower end of a housing which surrounds the telescopic parts in their contracted state.
  • the housing is in fact in two telescopic parts for ease of transport, but
  • the housing is extended to its active length of substantially twice that of each of the telescopic jib parts.
  • the telescoping cylinder acts on the telescopic jib parts through a supporting carrier which is fixed on the lower end of the cylinder below the telescopic parts and which is arranged to engage guide surfaces within the lower portion of the housing.
  • the cylinder In extending the jib the cylinder is raised to lift the contracted telescopic parts so that a catch mechanism at the top of a housing engages and holds the upper end of the upper telescopic part.
  • the cylinder is then lowered taking with it the other telescopic parts.
  • the lower end of the upper telescopic part can be locked to the upper end of the next telescopic part by means of a locking mechanism comprising a bolt housed in the lower end of the upper part and arranged to engage in a bore in the next part.
  • the catch mechanism is released and the cylinder is again raised, pushing the extended upper part of the housing until the upper end of the next part engages the catch mechanism.
  • the process is repeated until the lowest telescopic part is raised into the upper portion of the housing.
  • the cylinder and its supporting carrier are then lowered on their own, and means is provided for connecting the upper end of the cylinder with the lower end of the lower telescopic part so that the cylinder can be again raised to extend the telescopic parts further from the housing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
US00400652A 1972-09-28 1973-09-25 Telescopic crane jib Expired - Lifetime US3845866A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19722247491 DE2247491C2 (de) 1972-09-28 1972-09-28 Teleskopierbarer Kranausleger mit Hubverdopplung
DE19722249309 DE2249309A1 (de) 1972-10-07 1972-10-07 Teleskopierbarer kranausleger mit verriegelungsvorrichtung

Publications (1)

Publication Number Publication Date
US3845866A true US3845866A (en) 1974-11-05

Family

ID=25763896

Family Applications (1)

Application Number Title Priority Date Filing Date
US00400652A Expired - Lifetime US3845866A (en) 1972-09-28 1973-09-25 Telescopic crane jib

Country Status (3)

Country Link
US (1) US3845866A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2201240B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1390469A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6189712B1 (en) * 1997-05-28 2001-02-20 Mannesmann Ag Crane with telescope jib
US6206213B1 (en) * 1999-04-29 2001-03-27 Mannesmann Ag Crane with a luffing jib
US6216895B1 (en) * 1998-03-18 2001-04-17 Grove U.S. L.L.C. Lateral jib locking device
US20030071004A1 (en) * 2001-10-12 2003-04-17 Higgins David J. Extensible column
CN100520340C (zh) * 2006-12-07 2009-07-29 辽宁省安全科学研究院 高处作业吊篮安全锁试验装置
CN110902582A (zh) * 2019-12-04 2020-03-24 太原重工股份有限公司 伸缩臂及包括这种伸缩臂的起重机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI802255A7 (fi) * 1979-07-25 1981-01-01 Coles Cranes Ltd Nosturin puomi.
US4327533A (en) * 1980-08-13 1982-05-04 Kidde, Inc. Crane boom extending, retracting and cooperative latching arrangement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1907024A (en) * 1929-12-13 1933-05-02 Willard Portable hoist
FR1023182A (fr) * 1950-08-09 1953-03-16 Grue
FR1264080A (fr) * 1960-05-05 1961-06-19 Const Metallurg Jean Faure Ate Mode de surélévation des grues à tour
US3715014A (en) * 1970-03-18 1973-02-06 Toyoda Automatic Loom Works Industrial truck
US3774727A (en) * 1971-08-25 1973-11-27 Bygg Och Transportekronomi Ab Lift trucks having a three-stage lift mast

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1907024A (en) * 1929-12-13 1933-05-02 Willard Portable hoist
FR1023182A (fr) * 1950-08-09 1953-03-16 Grue
FR1264080A (fr) * 1960-05-05 1961-06-19 Const Metallurg Jean Faure Ate Mode de surélévation des grues à tour
US3715014A (en) * 1970-03-18 1973-02-06 Toyoda Automatic Loom Works Industrial truck
US3774727A (en) * 1971-08-25 1973-11-27 Bygg Och Transportekronomi Ab Lift trucks having a three-stage lift mast

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6189712B1 (en) * 1997-05-28 2001-02-20 Mannesmann Ag Crane with telescope jib
US6216895B1 (en) * 1998-03-18 2001-04-17 Grove U.S. L.L.C. Lateral jib locking device
US6206213B1 (en) * 1999-04-29 2001-03-27 Mannesmann Ag Crane with a luffing jib
US20030071004A1 (en) * 2001-10-12 2003-04-17 Higgins David J. Extensible column
CN100520340C (zh) * 2006-12-07 2009-07-29 辽宁省安全科学研究院 高处作业吊篮安全锁试验装置
CN110902582A (zh) * 2019-12-04 2020-03-24 太原重工股份有限公司 伸缩臂及包括这种伸缩臂的起重机
CN110902582B (zh) * 2019-12-04 2021-07-09 太原重工股份有限公司 伸缩臂及包括这种伸缩臂的起重机

Also Published As

Publication number Publication date
GB1390469A (en) 1975-04-16
FR2201240A2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-04-26
FR2201240B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-07-13

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