GB894681A - Improvements relating to cranes - Google Patents

Improvements relating to cranes

Info

Publication number
GB894681A
GB894681A GB511759A GB511759A GB894681A GB 894681 A GB894681 A GB 894681A GB 511759 A GB511759 A GB 511759A GB 511759 A GB511759 A GB 511759A GB 894681 A GB894681 A GB 894681A
Authority
GB
United Kingdom
Prior art keywords
piston
ram
rams
pipe
rod
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
GB511759A
Inventor
Arthur Ernest Franklin
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.)
Priestman Brothers Ltd
Original Assignee
Priestman Brothers 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 Priestman Brothers Ltd filed Critical Priestman Brothers Ltd
Priority to GB511759A priority Critical patent/GB894681A/en
Publication of GB894681A publication Critical patent/GB894681A/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

894,681. Luffing jib cranes. PRIESTMAN BROS. Ltd. Feb. 12, 1960 [Feb. 13, 1959], No. 5117/59. Class 78 (4). The jib 4, Fig. 1, of a crane is luffed by two hydraulic rams 11, 12 connected mechanically in series. Two similarly arranged rams may be provided mechanically in parallel with rams 11, 12. In one embodiment the cylinders of the rams 11, 12, Fig. 2, are pivotally or rigidly connected together, fluid being introduced into ram 11 through a pipe 30 and a passage 27 within a piston-rod 16. A hole 32 leads to a space 33 below the piston, from which fluid reaches the ram 12 through a pipe 34. In a second embodiment, the piston-rod 17 of the ram 12 is attached to the cylinder of ram 11, fluid reaching the underside of the piston of ram 12 through a pipe 34, a passage in the piston rod and a hole similar to the hole 32. As shown in Fig. 4, the piston-rods 16,17 may be connected end to end.
GB511759A 1959-02-13 1959-02-13 Improvements relating to cranes Expired GB894681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB511759A GB894681A (en) 1959-02-13 1959-02-13 Improvements relating to cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB511759A GB894681A (en) 1959-02-13 1959-02-13 Improvements relating to cranes

Publications (1)

Publication Number Publication Date
GB894681A true GB894681A (en) 1962-04-26

Family

ID=9790029

Family Applications (1)

Application Number Title Priority Date Filing Date
GB511759A Expired GB894681A (en) 1959-02-13 1959-02-13 Improvements relating to cranes

Country Status (1)

Country Link
GB (1) GB894681A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1244357B (en) * 1965-09-06 1967-07-13 Weimar Werk Veb Boom adjustment device for cranes and excavators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1244357B (en) * 1965-09-06 1967-07-13 Weimar Werk Veb Boom adjustment device for cranes and excavators

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