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FR2453104A1 - Safety device to prevent fork lift trucks lifting excessive loads - uses hydraulic pressure transducer to activate alarm and pressure release to prevent lifting of loads above safe working load - Google Patents

Safety device to prevent fork lift trucks lifting excessive loads - uses hydraulic pressure transducer to activate alarm and pressure release to prevent lifting of loads above safe working load

Info

Publication number
FR2453104A1
FR2453104A1FR7908736AFR7908736AFR2453104A1FR 2453104 A1FR2453104 A1FR 2453104A1FR 7908736 AFR7908736 AFR 7908736AFR 7908736 AFR7908736 AFR 7908736AFR 2453104 A1FR2453104 A1FR 2453104A1
Authority
FR
France
Prior art keywords
lifting
prevent
loads
safety device
fork lift
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
FR7908736A
Other languages
French (fr)
Other versions
FR2453104B3 (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.)
PRETNAR JOZEF
Original Assignee
PRETNAR JOZEF
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 PRETNAR JOZEFfiledCriticalPRETNAR JOZEF
Priority to FR7908736ApriorityCriticalpatent/FR2453104A1/en
Publication of FR2453104A1publicationCriticalpatent/FR2453104A1/en
Application grantedgrantedCritical
Publication of FR2453104B3publicationCriticalpatent/FR2453104B3/fr
Grantedlegal-statusCriticalCurrent

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Abstract

The safety device prevents fork lift trucks lifting loads in excess of their safe working load. A bridge type pressure transducer measures the pressure in the hydraulic cylinder which provides the lifting force. The output of the bridge transducer provides electrical input to a differential amplifier whose output drives in turn a threshold detector circuit, the threshold being adjustable with a potentiometer. If the preset threshold is exceeded an electric signal from the output of the threshold detector drives a voltage amplifier circuit which in turn feeds the coil of a relay having contacts provided to activate a visual or audible signal and operate a hydraulic pressure release to prevent operation of the lifting device.
FR7908736A1979-04-061979-04-06Safety device to prevent fork lift trucks lifting excessive loads - uses hydraulic pressure transducer to activate alarm and pressure release to prevent lifting of loads above safe working loadGrantedFR2453104A1 (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
FR7908736AFR2453104A1 (en)1979-04-061979-04-06Safety device to prevent fork lift trucks lifting excessive loads - uses hydraulic pressure transducer to activate alarm and pressure release to prevent lifting of loads above safe working load

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
FR7908736AFR2453104A1 (en)1979-04-061979-04-06Safety device to prevent fork lift trucks lifting excessive loads - uses hydraulic pressure transducer to activate alarm and pressure release to prevent lifting of loads above safe working load

Publications (2)

Publication NumberPublication Date
FR2453104A1true FR2453104A1 (en)1980-10-31
FR2453104B3 FR2453104B3 (en)1982-02-12

Family

ID=9224050

Family Applications (1)

Application NumberTitlePriority DateFiling Date
FR7908736AGrantedFR2453104A1 (en)1979-04-061979-04-06Safety device to prevent fork lift trucks lifting excessive loads - uses hydraulic pressure transducer to activate alarm and pressure release to prevent lifting of loads above safe working load

Country Status (1)

CountryLink
FR (1)FR2453104A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
FR2499053A1 (en)*1981-02-041982-08-06Toyoda Automatic Loom Works METHOD AND APPARATUS FOR INDICATING THE CHARGING STATE OF A FORKLIFT FORKLIFT
EP1371602A3 (en)*2002-06-142005-11-30STILL WAGNER GmbH & Co KGIndustrial truck with a control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
FR2499053A1 (en)*1981-02-041982-08-06Toyoda Automatic Loom Works METHOD AND APPARATUS FOR INDICATING THE CHARGING STATE OF A FORKLIFT FORKLIFT
EP1371602A3 (en)*2002-06-142005-11-30STILL WAGNER GmbH & Co KGIndustrial truck with a control device

Also Published As

Publication numberPublication date
FR2453104B3 (en)1982-02-12

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