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US 2014/0083965 A1Published application
Crane
AssigneeLiebherr-Werk Biberach GmbH
InventorJoachim Mayer
Life of this patent
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Abstract
The present invention relates to a crane, in particular a tower crane, with a boom rotatable about an upright slewing gear axis and an out-of-service brake which permits and slows down the rotary movements of the boom in the out-of-service condition. According to the invention, the out-of-service brake is formed to operate in a rotational-speed-dependent manner such that with a greater rotational speed of the crane the applied braking torque is greater than with a smaller rotational speed of the crane.
Claims29
A crane comprising:
- a boom rotatably mounted about an upright axis of rotation;
- and
- an out-of-service brake that permits and slows down rotary movements of the boom in an out-of-service condition of the crane;
- wherein the out-of-service brake is adapted to operate in a rotational-speed-dependent manner such that an applied braking torque is greater at a greater rotational speed of the crane than at a lower rotational speed of the crane.
1 more element
Dependencies are inferred from the claim text.