DE69107472D1 - METHOD AND ARRANGEMENT FOR PREVENTING BREAKDOWNS IN THE CONTROL SYSTEM FOR LOAD SENSORS AND PRESSURE COMPENSATION IN A HYDRAULIC CRANE. - Google Patents

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

Info

Publication number
DE69107472D1
DE69107472D1 DE69107472T DE69107472T DE69107472D1 DE 69107472 D1 DE69107472 D1 DE 69107472D1 DE 69107472 T DE69107472 T DE 69107472T DE 69107472 T DE69107472 T DE 69107472T DE 69107472 D1 DE69107472 D1 DE 69107472D1
Authority
DE
Germany
Prior art keywords
hydraulic flow
crane
control system
available
control
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.)
Revoked
Application number
DE69107472T
Other languages
German (de)
Other versions
DE69107472T2 (en
Inventor
Lars Andersson
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.)
Hiab AB
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=DE69107472(D1) "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 DE69107472D1 publication Critical patent/DE69107472D1/en
Publication of DE69107472T2 publication Critical patent/DE69107472T2/en
Anticipated expiration legal-status Critical
Revoked 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
    • 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.
DE69107472T 1990-11-16 1991-11-14 METHOD AND ARRANGEMENT FOR PREVENTING BREAKDOWNS IN THE CONTROL SYSTEM FOR LOAD SENSORS AND PRESSURE COMPENSATION IN A HYDRAULIC CRANE. Revoked DE69107472T2 (en)

Applications Claiming Priority (2)

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
PCT/SE1991/000773 WO1992008666A1 (en) 1990-11-16 1991-11-14 Method and device for preventing the puncture of a load-sensing and pressure-compensating control system for a hydraulic crane

Publications (2)

Publication Number Publication Date
DE69107472D1 true DE69107472D1 (en) 1995-03-23
DE69107472T2 DE69107472T2 (en) 1995-06-14

Family

ID=20380929

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69107472T Revoked DE69107472T2 (en) 1990-11-16 1991-11-14 METHOD AND ARRANGEMENT FOR PREVENTING BREAKDOWNS IN THE CONTROL SYSTEM FOR LOAD SENSORS AND PRESSURE COMPENSATION 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
DK1490288T3 (en) * 2001-11-28 2015-05-11 Hojbjerg Maskinfabrik As Load control system, preferably for boom 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
SE9003656D0 (en) 1990-11-16
ATE118459T1 (en) 1995-03-15
SE467408B (en) 1992-07-13
EP0557390A1 (en) 1993-09-01
DE69107472T2 (en) 1995-06-14
WO1992008666A1 (en) 1992-05-29
SE9003656L (en) 1992-05-17
ES2068612T3 (en) 1995-04-16
JPH06504512A (en) 1994-05-26
EP0557390B1 (en) 1995-02-15

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8331 Complete revocation