Wheeled Transportation device

1. A wheeled transportation device comprising a base, where the base comprises a front end, a rear end, an upper part and a lower part,

said lower part comprising a number of wheels and said upper part comprising at least one substantially horizontal and plane surface,

said wheeled transportation device comprising at least one movable first engagement member adapted to engage a frame part of a bed,

said movable first engagement member being movable between a resting engagement member position and an activated engagement member position, said movable first engagement member extending above said substantially horizontal and plane surface in the activated engagement member position,

wherein said upper part comprises a further engagement member located above said at least one substantially horizontal and plane surface, and

wherein said resting engagement member position is located at or below said at least one substantially horizontal and plane surface.

2. A wheeled transportation device according to any one claims 1 , wherein said movable first engagement member comprises a pair of hook members.

3. A wheeled transportation device according to claim 1 , wherein said number of wheels comprises a first pair of drive wheels arranged with coinciding first axes of rotation, each wheel in said pair being driven by an individually controllable electric motor.

4. A wheeled transportation device according to claim 3 , wherein said number of wheels comprises a second pair of drive wheels arranged with coinciding second axes of rotation orthogonal to said coinciding first axes of rotation, each wheel in said pair being driven by an individually controllable electric motor, said second pair of wheels being movable between a retracted resting position and an activated position.

5. A wheeled transportation device according to claim 3 , where the wheeled transportation device is generally symmetrical about a longitudinal vertical plane, and wherein the coinciding second axes of rotation are arranged in said longitudinal vertical plane.

6. A wheeled transportation device according to claim 1 , wherein said further engagement member is adapted to engage a patient support base of a bed.

7. A wheeled transportation device according to claim 1 , wherein said further engagement member is a downwardly open fixed hook member.

8. A wheeled transportation device according to claim 1 further comprising a movable pin with a vertical longitudinal axis, the pin being movable along said vertical longitudinal axis.

9. A wheeled transportation device according to claim 1 , wherein the wheeled transportation device comprises a built-in control computer, sensors, control means for motors, and communication means.

10. A wheeled transportation device according to claim 1 , wherein the computer comprises software adapted for autonomous control of the transportation device based on input from said sensors.

11. A wheeled transportation device according to claim 1 , further comprising manual input devices adapted to allow manual control of the wheeled transportation device.

12. A wheeled transportation device according to claim 1 , wherein the at least one movable first engagement member is adapted to engage at least one horizontal beam in a frame part of a bed.

13. A wheeled transportation device comprising a base, where the base comprises a front end, a rear end, an upper part and a lower part,

said lower part comprising a number of wheels and said upper part comprising at least one substantially horizontal and plane surface,

said wheeled transportation device comprising at least one movable first engagement member adapted to engage a frame part of a bed,

said movable first engagement member being movable between a resting engagement member position and an activated engagement member position, said movable first engagement member extending above said substantially horizontal and plane surface in the activated engagement member position,

where said upper part comprises a further engagement member located above said at least one substantially horizontal and plane surface,

wherein said number of wheels comprises a first pair of drive wheels arranged with coinciding first axes of rotation, each wheel in said pair being driven by an individually controllable electric motor.

14. A wheeled transportation device according to claim 13 , wherein said number of wheels comprises a second pair of drive wheels arranged with coinciding second axes of rotation orthogonal to said coinciding first axes of rotation, each wheel in said pair being driven by an individually controllable electric motor, said second pair of wheels being movable between a retracted resting position and an activated position.

15. A wheeled transportation device according to claim 13 , where the wheeled transportation device is generally symmetrical about a longitudinal vertical plane, and wherein the coinciding second axes of rotation are arranged in said longitudinal vertical plane.

16. A wheeled transportation device comprising a base, where the base comprises a front end, a rear end, an upper part and a lower part,

said lower part comprising a number of wheels and said upper part comprising at least one substantially horizontal and plane surface,

said wheeled transportation device comprising at least one movable first engagement member adapted to engage a frame part of a bed,

said movable first engagement member being movable between a resting engagement member position and an activated engagement member position, said movable first engagement member extending above said substantially horizontal and plane surface in the activated engagement member position,

where said upper part comprises a further engagement member located above said at least one substantially horizontal and plane surface,

wherein said further engagement member is a downwardly open fixed hook member.