Traversing hoists – Having random condition sensor combined with an indicator or... – Senses crane tilt
Patent
1997-09-29
1999-03-30
Brahan, Thomas J.
Traversing hoists
Having random condition sensor combined with an indicator or...
Senses crane tilt
B66C 1318
Patent
active
058877355
ABSTRACT:
The present invention relates to a crane vehicle with an overload safety unit, with a jib, preferably a telescoping jib, hinged to its superstructure which jib can be luffed by means of a luffing ram which is hinged to the jib and the superstructure, with extending sliding beams which are positioned at the end parts of the longitudinal sides of the carrier which face each other and which are provided at their ends with extending stabilizer bases, and with a unit measuring the swing angle of the jib the signals of which unit are fed to a processing unit of the overload safety unit, where the overload safety unit generates a warning signal and/or stops the crane operation when the crane reaches or exceeds limits which endanger its stability. In accordance with the invention a monitoring unit which detects the extension state or extension length of the sliding beams is provided which feeds the signals corresponding to the corresponding extension length of the individual sliding beams to the overload safety unit and the processing unit of the overload safety unit determines the stability of the stand rectangle resulting from the extension state of the sliding beams for every angle of swing of the jib from the signals of the monitoring unit for the extension length of the sliding beams and from the signals from the unit which measures the angle of swing of the jib.
REFERENCES:
patent: 5160056 (1992-11-01), Yoshimatsu et al.
patent: 5217126 (1993-06-01), Hayashi et al.
Brahan Thomas J.
Liebherr-Werk Ehingen GmbH
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