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 MEMBRS IN ASSEMBLED RELATION, SAID TENSION WITHIN SAID ELASTIC RING BEING PRIMARILY IN AN AXIAL DIRECTION WITH RESPECT TO SAID SURFACES, AND A CONTINUOUS ANNULAR GROOVE OF SINUSOIDAL CONFIGURATION DEFINED IN AT LEAST ONE OF SAID SURFACES, SAID GROOVE COMPRISING ADJACENT PORTIONS OBLIQUELY RELATED TO EACH OTHER AND TO SAID AXIS OF ROTATION INTERCONNECTED BY AN ARCUATE PORTION, SAID GROOVE INCLUDING OPPOSED RADIALLY EXTENDING SURFACE PORTIONS INTERSECTING THE ASSOCIATED SURFACE AND EXTENDING ABOUT THE CIRCUMFERENCE OF THE ASSOCIATED SURFACE, THE AXIAL WIDTH OF SAID GROOVE BEING SUBSTANTIALLY LESS THAN THE AXIAL WIDTH OF SAID INNER AND OUTER SURFACES AND RING, THE RADIAL DEPTH OF SAID GROOVE BEING SUFFICIENT TO PERMIT THE PORTIONS OF SAID RING AXIALLY ALIGNED WITH SAID GROOVE TO EXPAND INTO SAID GROOVE RELIEVING THE TENSION STRESSES IN SAID RING PORTION WITHIN SAID GROOVE PROVIDING A KEYING PORTION PLACING THE UNRELIEVED RING PORTIONS IN SHEAR RELATION WITH THE LOCALIZED KEYING PORTIONS, THEREBY RESISTING BOTH RELATIVE AXIAL AND ROTATIVE DISPLACEMENT OF SAID RING, HUB, AND INERTIA MEMBER.