Vibration damper

Claim 1

IN A VIBRATION DAMPENER, A HUB MEMBER HAVING AN AXIS OF ROTATION AND AN OUTER SURFACE CONCENTRIC TO SAID AXIS, AN ANNULAR INERTIA MEMBER CIRCUMSCRIBING SAID OUTER SURFACE AND HAVING AN INNER SURFACE, CONCENTRIC TO, AND RADIALLY SPACED FROM, SAID OUTER SURFACE, AN ELASTIC RING HAVING A NORMAL RADIAL THICKNESS GREATER THAN THE RADIAL THICKNESS OF THE SPACING BETWEEN SAID HUB AND INERTIA MEMBERS INTERPOSED BETWEEN SAID OUTER AND INNER SURFACES UNDER TENSION MAINTAINING SAID HUB, RING AND INERTIA MEMBERS IN ASSEMBLED RELATION, SAID TENSION WITHIN SAID ELASTIC RING BEING PRIMARILY IN AN AXIAL DIRECTION WITH RESPECT TO SAID SURFACES AND AN ANNULAR RECESS DEFINED IN EACH OF SAID SURFACES, SAID RECESSES EACH INCLUDING OPPOSED RADIALLY EXTENDING SURFACE PORTIONS INTERSECTING THE ASSOCIATED SURFACE AND TRANSVERSELY RELATED TO THE AXIS OF SAID INNER AND OUTER SURFACES, THE WIDTH OF SAID RECESSES BEING SUBSTANTIALLY LESS THAN THE AXIAL WIDTH OF SAID INNER AND OUTER SURFACES AND RING, THE RADIAL DEPTH OF SAID RECESSES BEING SUFFICIENT TO PERMIT THE PORTIONS OF SAID RING AXIALLY ALIGNED WITH SAID RECESSES TO EXPAND INTO SAID RECESSES SUBSTANTIALLY RELIEVING THE TENSION STRESSES IN SAID RING PORTION WITHIN SAID RECESSES PROVIDING A KEYING PORTION PLACING THE UNRELIEVED RING PORTIONS IN SHEAR RELATION WITH THE LOCALIZED KEYING PORTIONS THEREBY RESISTING RELATIVE AXIAL DISPLACEMENT OF SAID RING, HUB AND INERTIA MEMBER.