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GB1168356A - Improvements in Civil Engineering Machines - Google Patents

Improvements in Civil Engineering Machines

Info

Publication number
GB1168356A
GB1168356A GB3837967A GB3837967A GB1168356A GB 1168356 A GB1168356 A GB 1168356A GB 3837967 A GB3837967 A GB 3837967A GB 3837967 A GB3837967 A GB 3837967A GB 1168356 A GB1168356 A GB 1168356A
Authority
GB
United Kingdom
Prior art keywords
jib
stays
crane
screw
adjusted
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
GB3837967A
Inventor
Frederick Desmond Farmery
Richard Samuel Hudson
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 GB3837967A priority Critical patent/GB1168356A/en
Publication of GB1168356A publication Critical patent/GB1168356A/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
    • B66C23/88—Safety gear
    • B66C23/92—Snubbers or dashpots for preventing backwards swinging of jibs, e.g. in the event of cable or tackle breakage

Landscapes

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

Abstract

1,168,356. Back stays for jib cranes. PRIESTMAN BROS. Ltd. 1 Oct., 1968 [21 Aug., 1967], No. 38379/67. Heading B8B. [Also in Division E1] To prevent the jib 4 of a crane being luffed upwards beyond the safe limit, a pair of stays 16 are provided, which are loaded by springs 13 so that as the jib is lowered the slack which develops in the stays is taken up. The length of the stays is adjusted by a screw 20 acting between a pivoted member 7 and the base of the crane. The screw 9 which attaches the member 7 to the base must also be adjusted. A single stay only may be provided mounted centrally of the jib. The spring 13 may be replaced by a counterweight acting on a portion of lever 11 which extends towards the jib.
GB3837967A 1967-08-21 1967-08-21 Improvements in Civil Engineering Machines Expired GB1168356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3837967A GB1168356A (en) 1967-08-21 1967-08-21 Improvements in Civil Engineering Machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3837967A GB1168356A (en) 1967-08-21 1967-08-21 Improvements in Civil Engineering Machines

Publications (1)

Publication Number Publication Date
GB1168356A true GB1168356A (en) 1969-10-22

Family

ID=10403101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3837967A Expired GB1168356A (en) 1967-08-21 1967-08-21 Improvements in Civil Engineering Machines

Country Status (1)

Country Link
GB (1) GB1168356A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592135A1 (en) * 1992-10-08 1994-04-13 The Manitowoc Company, Inc. Luffing jib backstop assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592135A1 (en) * 1992-10-08 1994-04-13 The Manitowoc Company, Inc. Luffing jib backstop assembly

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees