| 摘要 |
The present invention provides a fluid actuated coupling assembly for releasably coupling at least two elements together, comprising an outer sleeve, an inner sleeve concentrically mounted within the outer sleeve and secured thereto at least at one end and defining a recess between the two sleeves which is closed at least at said one end of the sleeves, means for introducing a pressure fluid in said recess and means for preventing exhaust of such pressure fluid, the radial dimension of the sleeve being variable by changing the pressure on the pressure fluid in the said recess, the volume of the recess in the non-pressurized state not exceeding a volume corresponding to a relationship between the width of the recess and the average diameter of the recess being 2 x 10-2. |
