Electro-conductive pipe coupling

Claim 1

AN ELECTRICALLY HIGHLY CONDUCTIVE PIPE COUPLING FOR COUPLING ELECTRICALLY CONDUCTIVE PIPES COMPRISING IN COMBINATION, AN ELECTRICALLY CONDUCTIVE MIDDLE RING FOR RECEIVING THE AXIALLY INSERTED END PORTIONS OF COUPLED PIPE SECTIONS, SAID MIDDLE RING HAVING A CENTER AXIS AND OUTWARDLY FLARING ENDS DEFINING ANNULAR RECESSES WITH SAID INSERTED END PORTIONS, EACH SAID RECESS HAVING AN APPROXIMATELY TRIANGULAR CROSS SECTION THE TOE END DIRECTED AXIALLY INWARD, ELECTRICALLY CONDUCTIVE RINGS EACH HAVING A TRIANGULAR CROSS SECTION AND ADAPTED TO FIT INTO EACH SAID ANNULAR RECESS NEAR SAID TOE END AND TO CIRCUMFERENTIAL REDUCTION WHEN AXIALLY COMPRESSED, AND EACH SAID CONDUCTIVE RING HAVING AN INNER CIRCUMFERENTIAL SURFACE FOR ENGAGING A PIPE SECTION, AN OUTER PERIPHERAL SURFACE FORMING AN ANGLE WITH SAID INNER SURFACE FOR ENGAGING A PIPE SECTION, AN OUTER PERIPHERAL SURFACE FORMING AN ANGLE WITH SAID INNER SURFACE FOR ENGAGING OUTWARDLY FLARING END OF THE MIDDLE RING, AND AN OUTER FACE OPPOSITE SAID ANGLE FORMED BETWEEN SAID SURFACES, SAID INNER AND OUTER SURFACES DEFINING A PLURALITY OF SERRATIONS FOR BITING THROUGH ANY SCALE AND DIRT AND INTO SAID PIPE TO MAKE A GOOD ELECTRIC CONTACT BETWEEN SAID CONDUCTIVE RING AND PIPE, ANNULAR GASKET FORMED OF ELASTOMERIC MATERIAL AND DISPOSED AXIALLY OUTWARD OF EACH SAID CONDUCTIVE RING AND EACH SAID GASKET SHAPED TO FIT INTO A SAID ANNULAR RECESS TO ENGAGE THE END FACE OF AN ASSOCIATED CONDUCTIVE RING, FOLLOWER MEANS MOVABLE AXIALLY INWARD TO CONTACT AND COMPRESS SAID GASKETS TO SEAL SAID RECESSES AND TO RESILIENTLY ENGAGE THE END FACES OF SAID CONDUCTIVE RINGS TO COMPRESS SAID CONDUCTIVE RINGS INTO THE TOE END OF SAID RECESSES AND INTO CONTINUOUS ABRASIVE ENGAGEMENT WITH SAID PIPE SECTIONS AND SAID MIDDLE RING ENDS AND TO HOLD SAID CONDUCTIVE RINGS FIRMLY IN SUCH ENGAGEMENT UNDER VARIABLE CONDITIONS OF VIBRATION, AND TEMPERATURE TO FORM WITH SAID PIPE SECTIONS AND MIDDLE RING AN ELECTRICALLY HIGHLY CONDUCTIVE PATH BETWEEN SAID PIPE SECTIONS THROUGH SAID PIPE COUPLING.