GB1027859A - Device for automatically limiting the load moment in jib cranes - Google Patents

Device for automatically limiting the load moment in jib cranes

Info

Publication number
GB1027859A
GB1027859A GB3386064A GB3386064A GB1027859A GB 1027859 A GB1027859 A GB 1027859A GB 3386064 A GB3386064 A GB 3386064A GB 3386064 A GB3386064 A GB 3386064A GB 1027859 A GB1027859 A GB 1027859A
Authority
GB
United Kingdom
Prior art keywords
weight
jib
load
cranes
luffing
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
GB3386064A
Inventor
Richard Markmann
Bruno Junck
Horst Rauter
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.)
NEPTUN SCHIFFSWERFT VEB
Original Assignee
NEPTUN SCHIFFSWERFT VEB
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 NEPTUN SCHIFFSWERFT VEB filed Critical NEPTUN SCHIFFSWERFT VEB
Priority to GB3386064A priority Critical patent/GB1027859A/en
Publication of GB1027859A publication Critical patent/GB1027859A/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
    • B66C23/90—Devices for indicating or limiting lifting moment
    • B66C23/905—Devices for indicating or limiting lifting moment electrical

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)
  • Jib Cranes (AREA)

Abstract

1,027,859. Safe load indicator for jib-cranes. SCHIFFSWERFT " NEPTUN " ROSTOCK VEB. Aug. 19, 1964, No. 33860/64. Heading B8B. In an overload prevention device for jib cranes a load cable 18 deforms a diaphragm 19 and this force is transmitted hydraulically through a conduit 3 to a cylinder 2. This produces upward movement of a piston 4 and a weight 5, which in its lower position holds a switch 14 closed by means of a pin 12. When the switch 14 is closed the luffing and hoisting winches may be operated. If a weight smaller than the safe load is lifted the weight 5 does not move. When the moment is increased by luffing the jib out, weights 8, which rest on the weight 5, are sequentially lifted by a cone 9 attached to the jib 11 by a cable 10. When the weight 4 is sufficiently unloaded by the cone 9 it moves up and breaks the control circuits of the winches. An air cushion 21 in an equalizing reservoir 20 compensates for temperature produced variations in the volume of hydraulic fluid. A solenoid valve 23 closes as soon as the crane begins to operate so that changes in pressure due to the load are not equalized.
GB3386064A 1964-08-19 1964-08-19 Device for automatically limiting the load moment in jib cranes Expired GB1027859A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3386064A GB1027859A (en) 1964-08-19 1964-08-19 Device for automatically limiting the load moment in jib cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3386064A GB1027859A (en) 1964-08-19 1964-08-19 Device for automatically limiting the load moment in jib cranes

Publications (1)

Publication Number Publication Date
GB1027859A true GB1027859A (en) 1966-04-27

Family

ID=10358383

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3386064A Expired GB1027859A (en) 1964-08-19 1964-08-19 Device for automatically limiting the load moment in jib cranes

Country Status (1)

Country Link
GB (1) GB1027859A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2056957A1 (en) * 1969-08-04 1971-05-07 Schwermasch Kirow Veb K

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2056957A1 (en) * 1969-08-04 1971-05-07 Schwermasch Kirow Veb K

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