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US 9,327,950 B2Granted
Crane
AssigneeLiebherr-Werk Biberach GmbH
InventorJoachim Mayer
Life of this patent
Estimating the term…
Abstract
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. 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
A crane comprising:
- a boom rotatable 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;
- and
- wherein on an input side of a slewing gear transmission the out-of-service brake is connected to a drive train of a slewing gear, which leads from a slewing drive to an output element of the slewing gear.
3 more elements
A crane comprising:
- a boom rotatably mounted about an upright axis of rotation;
- an out-of-service brake that permits and slows down rotary movements of the boom in an out-of-service condition of the crane;
- and
- a deactivator for deactivating the out-of-service brake in crane operation;
- 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;
- and
- wherein the deactivator comprises a brake lock for locking a movable brake part of the out-of-service brake formed as a centrifugal brake.
4 more elements
A crane comprising:
- a boom rotatably mounted about an upright axis of rotation;
- an out-of-service brake that permits and slows down rotary movements of the boom in an out-of-service condition of the crane;
- and
- a deactivator for deactivating the out-of-service brake in crane operation;
- 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;
- and
- wherein the deactivator comprises an axial positioning means for axially shifting a brake part of the out-of-service brake formed as a centrifugal brake into a non-engagement position.
4 more elements
A crane comprising:
- a boom rotatable mounted about an upright axis of rotation;
- an out-of-service brake that permits and slows down rotary movements of the boom in an out-of-service condition of the crane;
- and
- a slewing gear with a drive train, wherein the out-of-service brake is integrated into the drive train of the slewing gear;
- 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;
- and
- wherein the out-of-service brake comprises a viscous clutch/brake connected to a portion of the drive train of the slewing gear between a drive motor and a slewing gear transmission.
4 more elements
Dependencies are inferred from the claim text.