ATE118459T1 - METHOD AND ARRANGEMENT FOR PREVENTING BREAKDOWNS IN THE LOAD SENSOR AND PRESSURE BALANCE CONTROL SYSTEM IN A HYDRAULIC CRANE. - Google Patents

METHOD AND ARRANGEMENT FOR PREVENTING BREAKDOWNS IN THE LOAD SENSOR AND PRESSURE BALANCE CONTROL SYSTEM IN A HYDRAULIC CRANE.

Info

Publication number
ATE118459T1
ATE118459T1 AT91920481T AT91920481T ATE118459T1 AT E118459 T1 ATE118459 T1 AT E118459T1 AT 91920481 T AT91920481 T AT 91920481T AT 91920481 T AT91920481 T AT 91920481T AT E118459 T1 ATE118459 T1 AT E118459T1
Authority
AT
Austria
Prior art keywords
hydraulic flow
crane
control system
available
control
Prior art date
Application number
AT91920481T
Other languages
German (de)
Inventor
Lars Andersson
Original Assignee
Hiab Ab
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20380929&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE118459(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hiab Ab filed Critical Hiab Ab
Application granted granted Critical
Publication of ATE118459T1 publication Critical patent/ATE118459T1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)
  • Jib Cranes (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

In a method for preventing the puncture of a load-sensing and pressure-compensating control system for a hydraulic crane when the hydraulic flow requested to the different functions of the crane exceeds the maximum hydraulic flow available, the values of control signals Q1-QN from a means for controlling the different crane functions are added up, and the resulting sum QP is compared with the maximum hydraulic flow Qmax available from a pump. Should the hydraulic flow requested by the control signals exceed the maximum hydraulic flow available, the control signals are scaled down so as to define a flow which falls below the maximum flow available, thus ensuring that a hydraulic flow is at all times supplied to all the crane functions. A device for implementing the method can take the shape of a program in a computer which receives the control signals from the control means and transmits output signals to a directional-control-valve block in the control system.
AT91920481T 1990-11-16 1991-11-14 METHOD AND ARRANGEMENT FOR PREVENTING BREAKDOWNS IN THE LOAD SENSOR AND PRESSURE BALANCE CONTROL SYSTEM IN A HYDRAULIC CRANE. ATE118459T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9003656A SE467408B (en) 1990-11-16 1990-11-16 SETTING AND DEVICE FOR THE PREVENTION OF PUNCTIONING OF A LOADING AND PRESSURE COMPENSATING CONTROL SYSTEM FOR A HYDRAULIC CRANE

Publications (1)

Publication Number Publication Date
ATE118459T1 true ATE118459T1 (en) 1995-03-15

Family

ID=20380929

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91920481T ATE118459T1 (en) 1990-11-16 1991-11-14 METHOD AND ARRANGEMENT FOR PREVENTING BREAKDOWNS IN THE LOAD SENSOR AND PRESSURE BALANCE CONTROL SYSTEM IN A HYDRAULIC CRANE.

Country Status (7)

Country Link
EP (1) EP0557390B1 (en)
JP (1) JPH06504512A (en)
AT (1) ATE118459T1 (en)
DE (1) DE69107472T2 (en)
ES (1) ES2068612T3 (en)
SE (1) SE467408B (en)
WO (1) WO1992008666A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0779239B2 (en) * 1995-12-13 2006-09-13 Liebherr-Werk Ehingen GmbH Crane hoist control
ES2536454T3 (en) * 2001-11-28 2015-05-25 Hojbjerg Maskinfabrik A/S Load control system, preferably for arm cranes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638211A (en) * 1969-10-08 1972-01-25 Litton Systems Inc Crane safety system
US4222491A (en) * 1978-08-02 1980-09-16 Eaton Corporation Crane operating aid and sensor arrangement therefor
FR2504701A1 (en) * 1981-04-22 1982-10-29 Camiva DEVICE FOR CONTROLLING AUTOMATIC CORRECTION OF DEVERS FOR DEPLOYABLE ORIENTABLE SCALE OR ARM-LIKE ARMOR ON VEHICLE
DE3605462A1 (en) * 1986-02-24 1987-08-27 Mo N Proizv Ob Str Dorozh Mash METHOD FOR SECURING SAFE OPERATION OF SELF-DRIVING Jib Cranes, AND SYSTEM FOR CARRYING OUT THE SAME

Also Published As

Publication number Publication date
WO1992008666A1 (en) 1992-05-29
SE467408B (en) 1992-07-13
SE9003656L (en) 1992-05-17
JPH06504512A (en) 1994-05-26
DE69107472D1 (en) 1995-03-23
EP0557390A1 (en) 1993-09-01
ES2068612T3 (en) 1995-04-16
SE9003656D0 (en) 1990-11-16
EP0557390B1 (en) 1995-02-15
DE69107472T2 (en) 1995-06-14

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
RZN Patent revoked