Swivel pipe joint and seal assembly therefor

Claim 1

A FLUID CONDUCTING SWIVEL JOINT COMPRISING AN OUTER JOINT MEMBER INCLUDING TWO TUBULAR SECTIONS, MEANS RELEASABLY AND RIGIDLY SECURING THE SECTIONS IN COAXIAL RELATION, AN INNER TUBULAR MEMBER MOUNTED WITHIN ONE OF SAID TUBULAR SECTIONS AND HAVING A FLUID CONDUCTING BORE THEREIN, AND AN ABUTMENT SURFACE ON THE INNER END THEREOF, SAID ABUTMENT SURFACE BEING SUBSTANTIALLY COPLANAR WITH THE END SURFACE OF SAID ONE OF THE TUBULAR SECTIONS, SAID TUBULAR MEMBER FURTHER HAVING A RECESS SPACED RADIALLY OUTWARD FROM SAID ABUTMENT SURFACE AT SAID INNER END, THE OTHER OF THE TUBULAR SECTIONS HAVING AN ANNULAR RECESS THEREIN FACING SAID ABUTMENT SURFACE ON THE INNER TUBULAR MEMBER AND OPENING INTO THE BORE OF SAID OTHER TUBULAR SECTION, A SEAL ACTUATING PRESSURE RING IN SAID RECESS, A PLURALITY OF SPACED SPRINGS IN THE RECESS BEHIND THE SEAL ACTUATING RING AND FORCING THE RING TOWARD SAID ABUTMENT SURFACE OF THE INNER TUBULAR MEMBER WHEN THE TUBULAR SECTIONS ARE IN ASSEMBLED RELATION, A CORRUGATED ANNULAR SHEET MEMBER IN SAID RECESS, SAID SPRINGS BEING RECEIVED WITHIN OUTWARDLY FACING CORRUGATIONS OF SAID SHEET MEMBER, AND A DEFORMABLE FOIL SEALING MEANS HAVING A THIN COATING OF A YIELDABLE PLASTIC MATERIAL MOUNTED BETWEEN THE TUBULAR SECTIONS WITH ITS OUTER PERIPHERY CLAMPED BETWEEN SAID TUBULAR SECTIONS IN SEALING RELATION THEREWITH FOR FORMING A PRIMARY SEAL WITH SAID ABUTMENT SURFACE AND A SECONDARY SEAL WITHIN SAID RECESS WITH SAID INNER TUBULAR MEMBER, THE INNER PORTION OF THE SEALING MEANS BEING FORCED BY SAID RING AND SAID SPRINGS AGAINST THE ABUTMENT SURFACE OF THE TUBULAR MEMBER IN SLIDING SEALING ENGAGEMENT THEREWITH TO FORM SAID PRIMARY SEAL WITH THE TUBULAR MEMBER, SAID SEALING MEANS BEING DEFORMED UNDER HIGH FLUID PRESSURE WITHIN SAID BORE TO FORM WITHIN THE RECESS SAID SECONDARY ANNULAR SEAL WITH SAID TUBULAR MEMBER.