ATE263731T1 - HYDRAULIC Jib CRANE WITH LOAD CONTROL SYSTEM - Google Patents

HYDRAULIC Jib CRANE WITH LOAD CONTROL SYSTEM

Info

Publication number
ATE263731T1
ATE263731T1 AT97901526T AT97901526T ATE263731T1 AT E263731 T1 ATE263731 T1 AT E263731T1 AT 97901526 T AT97901526 T AT 97901526T AT 97901526 T AT97901526 T AT 97901526T AT E263731 T1 ATE263731 T1 AT E263731T1
Authority
AT
Austria
Prior art keywords
crane
control system
load
penalty
load rate
Prior art date
Application number
AT97901526T
Other languages
German (de)
Inventor
Gudmund Braendgaard
Jan Sorensen
Original Assignee
Hojbjerg Maskinfabrik As
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 Hojbjerg Maskinfabrik As filed Critical Hojbjerg Maskinfabrik As
Application granted granted Critical
Publication of ATE263731T1 publication Critical patent/ATE263731T1/en

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

Landscapes

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

Abstract

A load control system preferably for hydraulic cranes comprising at least one relevant signalling device connected to a control unit which, by loading of the crane beyond its nominal load rate, operates a dump valve for deactivation of such functions in the manually operable control-valve assembly, which may be actuated to cause an increase of the load on the crane. The special feature of this load control system is that it operates according to an educational principle of collective "punishment", comprising a total inactivation of the functions of the crane in a penalty period in case of attempts to exceed the nominal load rate of the crane, within a safety margin. By an increasing load on the crane, the control system calculates new penalty periods and load rates beyond the nominal load rate within a safety margin, and the control system will induce a constantly increasing penalty period in response to the extent and number of excesses. The educational principle consists in that the risk of the release of a penalty will cause the operator to adopt a better feeling of how much the crane can be loaded within its nominal load rate.
AT97901526T 1996-02-07 1997-02-07 HYDRAULIC Jib CRANE WITH LOAD CONTROL SYSTEM ATE263731T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK12396 1996-02-07
PCT/DK1997/000054 WO1997029038A1 (en) 1996-02-07 1997-02-07 A load control system preferably for hydraulic cranes

Publications (1)

Publication Number Publication Date
ATE263731T1 true ATE263731T1 (en) 2004-04-15

Family

ID=8090009

Family Applications (1)

Application Number Title Priority Date Filing Date
AT97901526T ATE263731T1 (en) 1996-02-07 1997-02-07 HYDRAULIC Jib CRANE WITH LOAD CONTROL SYSTEM

Country Status (6)

Country Link
EP (1) EP0879208B1 (en)
AT (1) ATE263731T1 (en)
AU (1) AU1540897A (en)
DE (1) DE69728522T2 (en)
ES (1) ES2221949T3 (en)
WO (1) WO1997029038A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7677401B2 (en) 2008-07-16 2010-03-16 Manitowoc Crane Companies, Inc. Load monitoring and control system with selective boom-up lockout

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516116A (en) * 1981-12-16 1985-05-07 Safety Devices (Engineering) Limited Apparatus for visually displaying the load-moment, axle-load, or payload of a vehicle
FR2677629B1 (en) * 1991-06-17 1998-02-20 Senergy Sarl METHOD FOR CONTROLLING THE LOAD FOR A LIFTING MACHINE AND DEVICE FOR ITS IMPLEMENTATION.
EP0708053A1 (en) * 1994-08-26 1996-04-24 Hiab Export A/S Overload protection system for hydraulic boom cranes, especially of the type used on motor vehicles

Also Published As

Publication number Publication date
WO1997029038A1 (en) 1997-08-14
DE69728522T2 (en) 2005-04-07
AU1540897A (en) 1997-08-28
EP0879208A1 (en) 1998-11-25
DE69728522D1 (en) 2004-05-13
EP0879208B1 (en) 2004-04-07
ES2221949T3 (en) 2005-01-16

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