Insulated compression coupling

Claim 1

A COMPRESSION PIPE COUPLING COMPRISING A MIDDLE RING HAVING A CENTRAL PORTION AND FLARED ENDS PROVIDING ANNULAR GASKET RECESSES; A GASKET WITHIN EACH OF SAID RECESSES; A PAIR OF FOLLOWERS ENGAGING SAID GASKETS AT THEIR EXPOSED OUTER ENDS; MEANS FOR DRAWING SAID FOLLOWERS TOGETHER; A STRAIGHT TUBULAR INSULATING SLEEVE WITHIN SAID MIDDLE RING, SAID CENTRAL PORTION HAVING A FIRST PORTION OF MINIMUM INSIDE DIAMETER ADJACENT ONE OF SAID FLARED ENDS AND BEING APPROXIMATELY THE SAME DIAMETER AS THE INSIDE DIAMETER OF SAID SLEEVE AND PROVIDING A SHOULDER ABUTTING THE END OF THE INSULATING SLEEVE, AND THE REMAINING PORTION OF SAID CENTRAL PORTION EXTENDING FROM SAID SHOULDER BACK TO THE EXTREME OTHER END HAVING AN INSIDE DIAMETER GREATER THAN THE OUTSIDE DIAMETER OF THE SLEEVE, SAID SLEEVE EXTENDING FROM SAID SHOULDER THROUGH SAID CENTRAL PORTION AT LEAST TO THE POINT OF JUNCTURE OF SAID CENTRAL PORTION AND THE OTHER OF SAID FLARED PORTIONS TO THEREBY INSULATE SAID MIDDLE RING FROM A PIPE END RECEIVED IN SAID OTHER END PORTION, AND MEANS FOR INSULATING SAID PIPE END FROM THE FOLLOWER AT SAID OTHER END OF THE MIDDLE RING.