GB1181464A - Boom Back-Stop Apparatus - Google Patents

Boom Back-Stop Apparatus

Info

Publication number
GB1181464A
GB1181464A GB20151/68A GB2015168A GB1181464A GB 1181464 A GB1181464 A GB 1181464A GB 20151/68 A GB20151/68 A GB 20151/68A GB 2015168 A GB2015168 A GB 2015168A GB 1181464 A GB1181464 A GB 1181464A
Authority
GB
United Kingdom
Prior art keywords
boom
cable
slack
sheave
frame
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
GB20151/68A
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.)
Ruston-Bucyrus Ltd
Original Assignee
Ruston-Bucyrus Ltd
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 Ruston-Bucyrus Ltd filed Critical Ruston-Bucyrus Ltd
Publication of GB1181464A publication Critical patent/GB1181464A/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
    • 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
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • B66C2700/0392—Movement of the crane arm; Coupling of the crane arm with the counterweights; Safety devices for the movement of the arm

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

1,181,464. Boom safety devices; taking up slack in flexible elements. RUSTON BUCYRUS Ltd. 29 April, 1968 [15 May, 1967], No. 20151/68. Heading B8B. A back stop apparatus for a crane boom 2 comprises a stop cable 6 which passes around a sheave 8 on a rotatable support frame 1 and is attached at both ends to the boom, the cable being associated with a slack take-up device which is mounted on the boom and operates during boom luffing and during retraction of the boom for transportation. In operation, the boom 2 pivots at 3 relative to the frame 1 and is prevented from passing through the vertical position by the cable 6 connected to the boom at 7 and to a slack take-up sheave 10. The latter is biased by a tension spring 13 in the cable wind-up direction and the circumference of the sheave is such that one revolution thereof will accumulate the full amount of slack developed. With the boom in the lowered position, it may be retracted by uncoupling the boom 2 from the frame 1 and swinging the base of the boom, which is pivotally attached to a pair of retracting arms 4, through 180 degrees about a pivot point 5 of the arms 4.
GB20151/68A 1967-05-15 1968-04-29 Boom Back-Stop Apparatus Expired GB1181464A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US63852767A 1967-05-15 1967-05-15

Publications (1)

Publication Number Publication Date
GB1181464A true GB1181464A (en) 1970-02-18

Family

ID=24560399

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20151/68A Expired GB1181464A (en) 1967-05-15 1968-04-29 Boom Back-Stop Apparatus

Country Status (3)

Country Link
US (1) US3433367A (en)
DE (1) DE1531142B2 (en)
GB (1) GB1181464A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3030820A1 (en) * 1979-08-17 1981-03-26 Coles Cranes Ltd., Sunderland, Tyne and Wear MOBILE CRANE WITH A TELESCOPIC BOOM
DE3127879C2 (en) * 1981-07-15 1983-11-24 Fa. Johannes Fuchs, 7257 Ditzingen Hoist with a boom
US5009566A (en) * 1989-10-20 1991-04-23 Clark Equipment Company Retractable boom stop

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2126118A (en) * 1936-02-17 1938-08-09 George S Kelley Load handling machine
US2924411A (en) * 1955-05-19 1960-02-09 Grinnell Corp Counterbalancing mechanism
DE1191083B (en) * 1957-10-17 1965-04-15 Franz Joseph Fenzl Mobile slewing crane
US3334756A (en) * 1966-09-09 1967-08-08 Bigge Drayage Co Boom lift control system

Also Published As

Publication number Publication date
DE1531142B2 (en) 1971-09-23
US3433367A (en) 1969-03-18
DE1531142A1 (en) 1969-11-13

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