CPC B60B 27/0015 (2013.01) [B60B 33/0044 (2013.01); B60B 33/0049 (2013.01); B60B 33/0092 (2013.01); B60B 2200/20 (2013.01)] | 10 Claims |
1. A rolling device for a device to enable the moving of the device along a surface, wherein the rolling device comprises:
a bearing housing for accommodation of a wheel axle carrying a wheel element,
axle support members rotatably accommodated in the bearing housing, wherein each axle support member supports an end portion of the wheel axle,
the wheel axle carrying the wheel element extends in between the axle support members, with each of the end portions of the wheel axle connected to each axle support members in an eccentric position displaced off-set from the center line of the axle support members,
a locking assembly operable between an unlocked position allowing the rotation of the axle support members relative to the bearing housing, and a locking position preventing the rotation of the axle support members relative to the bearing housing, wherein in the unlocked position of the locking assembly, a motor conducts rotation of the axle support members and of the wheel axis relative to the bearing housing for displacement of the wheel element by an eccentric movement between an extended position where at least a portion of the wheel element projects outside the bearing housing and a retracted position where the wheel element is located inside the bearing housing.
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