Rotatable damper

1. A rotatable mass fully rotatable around an axis of rotation and configured for self-damping a mechanical disturbance, the rotatable mass comprising inside thereof a device for damping the mechanical disturbance applied thereto, said damping device comprises:

(a) a fully rotatable structure affixed to a single location in the rotatable mass and comprising an outer frame and an inner frame bound to rotate with said fully rotatable structure, wherein one of said outer frame or said inner frame is movable relative to the other in at least one axis, and wherein said outer frame and said inner frame are both rigid; and

(b) a first chamber, disposed between said outer frame and said inner frame, containing a fluid and comprising a first opening in direct communication with a first constriction;

wherein said first chamber is readily compressible between a portion of said outer frame and a portion of said inner frame when approached by the mechanical disturbance; and

said first chamber, when compressed, is configured to expel at least partially said fluid through said first constriction, thereby damping the mechanical disturbance.

2. The rotatable mass of claim 1 , wherein said at least one axis is said axis of rotation and/or a radial axis relative to said axis of rotation.

3. The rotatable mass of claim 1 , wherein said outer frame, said inner frame, or both are at least partially circular.

4. The rotatable mass of claim 1 selected from the group consisting of: a wheel, a hub, a gear, a planetary revolving element, a rotor, a centrifuge, a driveshaft, a flywheel, a workpiece and a machining tool.

5. The rotatable mass of claim 1 , wherein said first chamber is expandable, elastic and/or inflatable.

6. The rotatable mass of claim 1 , wherein said portion of said outer frame comprises an inwardly projected rib and said portion of said inner frame comprises an outwardly projected rib.

7. The rotatable mass of claim 6 , wherein each of said inwardly projected rib and said outwardly projected rib comprises a length smaller than a distance between two perpendicularly opposing points on said outer frame and said inner frame, respectively, when in concentric formation.

8. The rotatable mass of claim 6 , wherein each of said inwardly projected rib and said outwardly projected rib comprises a second opening in direct communication with a second constriction.

9. The rotatable mass of claim 8 , wherein at least one of said first constriction and said second constriction comprises a narrowing, an orifice, a nozzle, a bottleneck, a chokepoint, a valve, and combinations thereof.

10. The rotatable mass of claim 1 further comprising a second chamber in direct communication with said first opening.

11. The rotatable mass of claim 10 , wherein said first and second chambers are configured to maintain a substantially constant volume when said fluid is not compressed.

12. A device for damping a mechanical disturbance applied to a rotatable mass, the damping device comprising:

(a) a fully rotatable structure affixable to a single location in the rotatable mass and comprising an outer frame and an inner frame bound to rotate with said fully rotatable structure, wherein one of said outer frame or said inner frame is movable relative to the other in at least one axis, and wherein said outer frame and said inner frame are both rigid; and

(b) a first chamber, disposed between said outer frame and said inner frame, containing a fluid and comprising a first opening in direct communication with a first constriction;

wherein said first chamber is readily compressible between a portion of said outer frame and a portion of said inner frame when approached by the mechanical disturbance; and

wherein said first chamber, when compressed, is configured to expel at least partially said fluid through said first constriction, thereby damping the mechanical disturbance.

13. The damping device of claim 12 , wherein said at least one axis is said axis of rotation and/or a radial axis relative to said axis of rotation.

14. The damping device of claim 12 , wherein said outer frame, said inner frame, or both are at least partially circular.

15. The damping device of claim 12 , wherein the rotatable mass is selected from the group consisting of: a wheel, a hub, a gear, a planetary revolving element, a rotor, a centrifuge, a driveshaft, a flywheel, a workpiece and a machining tool.

16. The damping device of claim 12 , wherein said first chamber is expandable, elastic and/or inflatable.

17. The damping device of claim 12 , wherein said portion of said outer frame comprises an inwardly projected rib and said portion of said inner frame comprises an outwardly projected rib.

18. The damping device of claim 7 , wherein each of said inwardly projected rib and said outwardly projected rib comprises a length smaller than a distance between two perpendicularly opposing points on said outer frame and said inner frame, respectively, when in concentric formation.

19. The damping device of claim 17 , wherein each of said inwardly projected rib and said outwardly projected rib comprises a second opening in direct communication with a second constriction.

20. The damping device of claim 19 , wherein at least one of said first constriction and said second constriction comprises a narrowing, an orifice, a nozzle, a bottleneck, a chokepoint, a valve, and combinations thereof.

21. The damping device of claim 12 , further comprising a second chamber in direct communication with said first opening.

22. The damping device of claim 21 , wherein said first and second chambers are configured to maintain a substantially constant volume when said fluid is not compressed.