Device for the production of a locking or braking effect between two elements

A radially deformable device for counteracting relative movement between two elements, such as a shaft and a hub, displaying two concentric surfaces along a center axis, said device comprising

• a one-piece cylindrical sleeve extending along the center axis thereof, for axial insertion between the two surfaces;
• said sleeve divided into sleeve sections, at least some of which are connected to each other at least by bridges integral with said sleeve;
• said sleeve sections circumferentially separated from each other by at least partially axially directed rows of through-holes formed in said sleeve with said through-holes projecting radially all the way through said sleeve from an outer peripheral surface of said sleeve to an inner peripheral surface of said sleeve and extending substantially along the major portion of the length of said sleeve;
• each of said sleeve sections arranged at a substantially equally radial distance from the center axis;
• said bridges defined between adjacent through-holes in each of said rows of through-holes with end points of each of said bridges located at substantially the same radial distance from the center axis whereby said bridges are subjected to substantially only non-radially directed forces;
• said sleeve further provided with weak zones which are operatively connected to said bridges, with said weak zones before compression having a radial thickness which is substantially equal to the radial thickness of each of said sleeve sections, and each said weak zones designed to be, through compression thereof in a direction projecting within radially inner and outer boundaries of said sleeve, expanded radially inwards and outwards into engagement with said two surfaces to counteract relative movement between the two elements;
• and said sleeve sections designed to be, upon axial compression of said sleeve, axially displaced in relation to circumferentially adjacent sleeve sections in order to produce compressive forces upon said bridges which thereby undergo such movement that compression forces producing said compression of said weak zones are produced in said sleeve.