Vibration isolating shaft coupling

Claim 1

A ROTARY COUPLING FOR ISOLATING FROM A FIRST BODY A PERIODIC TORQUE APPLIED TO A SECOND BODY WHILE AT THE SAME TIME TRANSMITTING TO THE FIRST BODY A CONSTANT TORQUE APPLIED TO THE SECOND BODY, WHICH COUPLING COMPRISES A FIRST MEMBER FOR CONNECTION TO ONE OF SAID BODIES, A SECOND MEMBER FOR CONNECTION TO THE OTHER OF THE SAID BODIES AND ROTATABLY MOUNTED COAXIALLY WITHIN THE FIRST MEMBER, A PLURALITY OF ABUTMENTS EXTENDING INWARDS FROM THE FIRST MEMBER, A CORRESPONDING NUMBER OF ABUTMENTS EXTENDING OUTWARDS FROM THE SECOND MEMBER, THE SAID INWARDLY AND OUTWARDLY EXTENDING ABUTMENTS BEING ARRANGED ALTERNATELY AROUND THE CIRCUMFERENCE OF THE INNER MEMBER, A PLURALITY OF VARIABLE-VOLUME FLUID-FILLED CONTAINERS INTERPOSED ONE BETWEEN EACH PAIR OF ADJACENT ABUTMENTS WITH THEIR DIRECTIONS OF EXPANSION AND CONTRACTION EXTENDING SUBSTANTIALLY CIRCUMFERENTIALLY WITH RESPECT TO THE COMMON AXIS OF THE FIRST AND SECOND MEMBERS, TWO VESSELS, EACH CONTAINING A FLUID, A PLURALITY OF CONDUIT MEANS, ONE FOR EACH CONTAINER, THE EFFECTIVE CROSS-SECTIONAL AREA OF EACH OF WHICH IS LESS THAN THE EFFECTIVE CROSSSECTIONAL AREA OF EACH OF THE SAID CONTAINERS, EACH OF WHICH CONTAINS A BODY OF FLUID AND EACH OF WHICH COMMUNICATES WITH BOTH THE INTERIOR OF ONE OF THE SAID CONTAINERS AND THE INTERIOR OF ONE OF THE SAID VESSELS, THE CONDUIT MEANS COMMUNICATING WITH EVERY ALTERNATE VARIABLE-VOLUME CONTAINER AND COMMUNICATING WITH ONE OF THE SAID TWO VESSELS AND THE REMAINING CONDUIT MEANS COMMUNICATING WITH THE OTHER OF THE SAID TWO VESSELS, THE MASSES OF THE SAID BODIES OF FLUID CONTAINED IN THE CONDUIT MEANS, THE DIMENSIONS OF THE CONDUIT MEANS, THE APPARENT BULK MODULUS OF THE FLUID IN EACH OF THE TWO VESSELS AND THE DEGREE OF DAMPING APPLIED TO THE BODY OF FLUID CONTAINED IN EACH OF THE SAID CONDUIT MEANS BEING SUCH THAT, AT A PARTICULAR FREQUENCY OF THE PERIODIC TORQUE, THE INERTIA REACTION OF THE SAID BODIES OF FLUID SUBSTANTIALLY BALANCE THE FORCES EXERTED ON THOSE BODIES OF FLUID BY THE FLUID IN THE VESSELS WITH WHICH THE CONDUIT MEANS CONTAINING THOSE BODIES OF FLUID COMMUNICATE.