Telescopable sliding beam
AssigneeLiebherr-Werk Ehingen GmbH
InventorsMikica Rafailovic, Alexander Patte
Life of this patent
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Abstract
The present disclosure relates to a telescopable sliding beam comprising a sliding beam box and at least one first and one second sliding beam, which are telescopable into each other, the first sliding beam being mounted in the sliding beam box such that it can be telescoped out, where at first the first sliding beam can be telescoped out, and after the same has telescoped out to a desired point, the second sliding beam can be telescoped out, whereas during backward retraction, the second sliding beam can first be retracted to a desired point and subsequently the first sliding beam can be retracted.
Claims16
A telescopable sliding beam comprising:
- a sliding beam box;
- and
- at least one first and one second sliding beam, which are telescopable into each other, the first sliding beam being mounted in the sliding beam box such that it can be telescoped out, the beams adapted to telescope out by first telescoping out the first sliding beam, and when the first beam has telescoped out to a desired point, telescoping out the second sliding beam, the beams being further adapted to retract backward by first retracting the second sliding beam to a desired point, and then subsequently retracting the first sliding beam.
A work machine, comprising:
- at least one telescopable sliding beam having a sliding beam box;
- and
- at least one first and one second sliding beam, which are telescopable into each other, said first sliding beam being mounted in said sliding beam box such that it can be telescoped out;
- and
- a first hydraulic actuator coupled to said first sliding beam;
- a second hydraulic actuator coupled to said second sliding beam;
- a control system for, during extension, supplying hydraulic fluid to said first hydraulic actuator and blocking the supply to said second actuator;
- and then supplying hydraulic fluid to said second actuator;
- and for, during retraction, supplying hydraulic fluid to said second hydraulic actuator and blocking the supply to said first actuator;
- and then supplying hydraulic fluid to the said actuator.
A method of operating a telescopable sliding beam, the beam having a sliding beam box and at least one first and one second sliding beam which are telescopable into each other, the first sliding beam being mounted in the sliding beam box such that it can be telescoped out, comprising:
- during extension, telescoping out the first sliding beam from the beam box without telescoping the second sliding beam from the first sliding beam, and when the first sliding beam has telescoped out to a desired extension point, telescoping out the second sliding beam
- during backward retraction, retracting the second sliding beam into the first sliding beam without retracting the first sliding beam into the beam box;
- and when the second sliding beam has been retracted to a desired retraction point, retracting the first sliding beam.
Dependencies are inferred from the claim text.