Back to results
US 2008/0173853 A1Published application
Arrangement at telescopic lifting beams
AssigneeLiko Research & Development AB
InventorGunnar Liljedahl
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeLiko Research & Development AB
InventorGunnar Liljedahl
Estimating the term…
A lifting means includes at least two telescopically displaceable lifting beams (1, 2), of which one (2) is connected to a driving means (3) in order to displace the second lifting beam (1) to and fro within said first lifting beam. A casing (4) can be placed to surround both the lifting beams and rest against these and surrounds both the lifting beams an essential part when they are protruded. A pressure spring (5) is placed within the casing (4) in order to displace the casing (4) so it surrounds both the lifting arms (1, 2) when they are in the protruded position in relation to each other whereby the pressure spring rests against the end of the casing (4), which end surrounds the displaceable lifting arm (1). A support (6) for the second end of the pressure spring (5) is attached on the fixed lifting beam (2).
Arrangement at a lifting means consisting of at least two telescopically displaceable lifting arms, of which one is connected to a driving means in order to displace the second lifting beam to and fro within the first lifting beam, whereby a casing can be brought to surround both the lifting beams and being extended a certain distance over both the lifting beams in their protruded position, characterized in that a pressure spring (5) is situated within the casing (4) and rests against the casing (4) at the end, which surrounds the displaceable lifting arm (1) and that a support (6) is attached on the fixed lifting arm (2) for supporting the second end of the pressure spring, which support (6) has a distance from the end of the lifting beam (2), which distance corresponds to about half of the length of the casing (4).
Dependencies are inferred from the claim text.