Vibration isolation coupling

Claim 1

AN ISOLATION COUPLING, COMPRISING, INNER AND OUTER CONCENTRICALLY ARRANGED AND RELATIVELY ROTATABLE MEMBERS, ONE OF SAID MEMBERS INCLUDING A GENERALLY CUP-SHAPED PORTION RECEIVING AN END OF THE OTHER OF SAID MEMBERS, AN ELASTOMERIC ISOLATION BUSHING INTERCONNECTING SAID END OF SAID OTHER MEMBER AND SAID CUP-SHAPED PORTION, A PAIR OF DIAMETRICALLY OPPOSED OPENINGS IN SAID CUP-SHAPED PORTION MOUNTING PIN MEANS EXTENDING RADIALLY FROM SAID OTHER MEMBER ADJACENT SAID END THEREOF AND HAVING A PAIR OF END PORTIONS EACH RESPECTIVE TO ONE OF SAID OPENINGS, AND A PAIR OF ELASTOMERIC ISOLATION COUPLING BUTTONS EACH MOUNTED ON A RESPECTIVE SAID END PORTION WITHIN SAID RESPECTIVE OPENING AND ENGAGEABLE WITH SAID CUP-SHAPED PORTION, SAID BUSHING NORMALLY LOCATING SAID MEMBERS IN A SUBSTANTIALLY NONDRIVINGLY CONNECTED NEUTRAL RELATION WHEREIN SAID BUTTONS ARE LOCATED OUT OF ENGAGEMENT WITH SAID CUP-SHAPED PORTION, SAID BUTTONS ENGAGING SAID CUPSHAPED PORTION UPON PREDETERMINED RELATIVE ROTATION BETWEEN SAID MEMBES FROM SAID NEUTRAL RELATION TO ESTABLISH RESILIENT DRIVING CONNECTION THEREBETWEEN.