FR2277027A1 - Mobile crane overload protection system - has electronic alarm circuit operating if centre of gravity leaves safe zone - Google Patents

Mobile crane overload protection system - has electronic alarm circuit operating if centre of gravity leaves safe zone

Info

Publication number
FR2277027A1
FR2277027A1 FR7423422A FR7423422A FR2277027A1 FR 2277027 A1 FR2277027 A1 FR 2277027A1 FR 7423422 A FR7423422 A FR 7423422A FR 7423422 A FR7423422 A FR 7423422A FR 2277027 A1 FR2277027 A1 FR 2277027A1
Authority
FR
France
Prior art keywords
centre
safe zone
protection system
overload protection
alarm circuit
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.)
Granted
Application number
FR7423422A
Other languages
French (fr)
Other versions
FR2277027B1 (en
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.)
Safran Electronics and Defense Actuation SAS
Original Assignee
Precilec SAS
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 Precilec SAS filed Critical Precilec SAS
Priority to FR7423422A priority Critical patent/FR2277027A1/en
Publication of FR2277027A1 publication Critical patent/FR2277027A1/en
Application granted granted Critical
Publication of FR2277027B1 publication Critical patent/FR2277027B1/fr
Granted 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)
  • Jib Cranes (AREA)

Abstract

An alarm is operated automatically by an electronic circuit whenever the centre of gravity emerges from a predetermined safe zone, independently of the load on the crane, the zone being inside the polygon on which the crane is supported, e.g. by wheels or outriggers. The abscissae and ordinates of the centre of gravity can be determined by electrical detectors measuring the load on each support. Comparison of the total load with that resulting from the difference between loads on two support assemblies can be arranged to operate the alarm when one or more of the predetermined load limits of the supports is exceeded.
FR7423422A 1974-07-05 1974-07-05 Mobile crane overload protection system - has electronic alarm circuit operating if centre of gravity leaves safe zone Granted FR2277027A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7423422A FR2277027A1 (en) 1974-07-05 1974-07-05 Mobile crane overload protection system - has electronic alarm circuit operating if centre of gravity leaves safe zone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7423422A FR2277027A1 (en) 1974-07-05 1974-07-05 Mobile crane overload protection system - has electronic alarm circuit operating if centre of gravity leaves safe zone

Publications (2)

Publication Number Publication Date
FR2277027A1 true FR2277027A1 (en) 1976-01-30
FR2277027B1 FR2277027B1 (en) 1977-10-28

Family

ID=9140938

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7423422A Granted FR2277027A1 (en) 1974-07-05 1974-07-05 Mobile crane overload protection system - has electronic alarm circuit operating if centre of gravity leaves safe zone

Country Status (1)

Country Link
FR (1) FR2277027A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443419A1 (en) * 1978-12-04 1980-07-04 Ferodo Sa DYNAMOMETRIC DEVICE FOR BOOM MACHINE, PARTICULARLY FOR TILTING CONTROL THEREOF
US4350254A (en) * 1978-12-15 1982-09-21 Potain Container handling and lifting equipment, such as a crane or a gantry
FR2599015A1 (en) * 1986-04-24 1987-11-27 Mo N Proizv DEVICE FOR PROTECTING LIFTING MECHANISMS AGAINST OVERLOADS AND SPILLS.
WO2003024858A1 (en) * 2001-09-21 2003-03-27 Ingersoll-Rand Company Material handler with center of gravity monitoring system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443419A1 (en) * 1978-12-04 1980-07-04 Ferodo Sa DYNAMOMETRIC DEVICE FOR BOOM MACHINE, PARTICULARLY FOR TILTING CONTROL THEREOF
US4350254A (en) * 1978-12-15 1982-09-21 Potain Container handling and lifting equipment, such as a crane or a gantry
FR2599015A1 (en) * 1986-04-24 1987-11-27 Mo N Proizv DEVICE FOR PROTECTING LIFTING MECHANISMS AGAINST OVERLOADS AND SPILLS.
WO2003024858A1 (en) * 2001-09-21 2003-03-27 Ingersoll-Rand Company Material handler with center of gravity monitoring system

Also Published As

Publication number Publication date
FR2277027B1 (en) 1977-10-28

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Legal Events

Date Code Title Description
ST Notification of lapse