Fluid seal

Claim 1

IN A JOINT INCLUDING AN ANNULAR SEAL CHAMBER DEFINED BY SPACED CONFRONTING FIRST AND SECOND WALLS AND AN INTERMEDIATE WALL EXTENDING BETWEEN SAID FIRST AND SECOND WALLS AND BEING CONNECTED TO SAID FIRST WALL; A SEAL IN SAID CHAMBER, SAID SEAL COMPRISING AN ANNULAR U-SHAPED SEALING MEMBER HAVING A BACK PORTION AGAINST AND IN CIRCUMFERENTIALLY CONFRONTING RELATION TO SAID INTERMEDIATE WALL, THE MINIMUM DISTANCE BETWEEN SAID FIRST AND SECOND WALLS BEING GREATER THAN THE CORRESPONDING MAXIMUM DIMENSION OF THE BACK PORTION OF THE SEALING MEMBER, SAID SEALING MEMBER ALSO HAVING SIDE PORTIONS CONNECTED TO AND EXTENDING FROM SAID BACK PORTION ALONG SAID FIRST AND SECOND WALLS, SAID SIDE PORTIONS TERMINATING IN ANDIMENSION OF THE BACK PORTION OF THE SEALING MEMBER, BEING OF A NON-CORROSIVE PLASTIC MATERIAL OPERABLE UNDER EXTREMES OF TEMPERATURE AND PRESSURE, AND AN ANNULAR USHAPED ENERGIZER HAVING A BACK PORTION IN CIRCUMFERENTIAL ENGAGEMENT WITH THE BACK PORTION OF THE SEALING MEMBER AND FIRST AND SECOND GROUPS OF FINGERS CONNECTED TO THE BACK PORTION OF THE ENERGIZER AND PROJECTING THEREFROM IN CONFRONTING RELATION WITH THE SIDE PORTIONS OF THE SEALING MEMBERS, SAID FINGERS HAVING TERMINAL EDGES RESILIENTLY BEARING AGAINST THEIR ASSOCIATED SIDE PORTIONS OF THE SEALING MEMBER BUT SUBSTANTIALLY ONLY ALONG THE ANNULAR EDGES OF SAID SIDE PORTIONS, ADJACENT FINGERS OF EACH GROUP BEING CONTIGUOUS SO AS TO PROVIDE A SUBSTANTIALLY CONTINUOUS CIRCLE OF PRESSURE AGAINST EACH OF SAID SIDE PORTIONS, AND MEANS CIRCUMFERENTIALLY ENGAGING THE BACK PORTION OF THE ENERGIZER AND APPLYING A RADIALLY DIRECTED FORCE THEREAGAINST FOR MAINTAINING THE BACK PORTION OF THE ENERGIZER AGAINST THE BACK PORTION OF THE SEALING MEMBER AND THUS THE FINGERS OF THE ENERGIZER AGAINST THE SIDE PORTIONS OF THE SEALING MEMBER.