Conduit construction

Claim 1

AN AIRCRAFT CONDUIT CONSTRUCTION COMPRISING: (A) A FIRST CONDUIT SECTION HAVING A LONGITUDINAL AXIS, (B) A SEPARATE CONDUIT SECTION WHICH CONSTITUTES AN EXTENSION OF SAID FIRST CONDUIT SECTION WHEN ALIGNED AND CONNECTED THEREWITH AND WHICH HAS A LONGITUDINAL AXIS, (C) SEAL SEAT MEANS FIXEDLY CONNECTED TO SAID FIRST CONDUIT SECTION IN SEALING RELATION AND HAVING A GENERALLY ANNULAR FLAT END SEAL FACE WHICH IS ORIENTED NORMAL TO SAID FIRST CONDUIT SECTION LONGITUDINAL AXIS AND A RAMP SURFACE WHICH INTERSECTS AND IS ORIENTED OBLIQUELY TO SAID END SEAL FACE, AND (D) SPRING-URGED SEAL PISTON MEANS SLIDABLY CONTACTING SAID SEPARATE CONDUIT SECTION IN SEALING RELATION AND HAVING A FLAT ANNULAR END LIP ORIENTED NORMAL TO SAID SEPARATE CONDUIT SECTION LONGITUDINAL AXIS AND PROJECTED BEYOND THE ADJACENT END OF SAID SEPARATE CONDUIT SECTION, SAID SEAL PISTON MEANS ANNULAR END LIP CONTACTING SAID SEAL SEAT MEANS RAMP AND BEING MOVED ANGULARLY AND LONGITUDINALLY OF SAID SEPARATE CONDUIT SECTION LONGITUDINAL AXIS AND INTO CONTACTING RELATION TO SAID SEAL SEAT MEANS END SEAL FACE AS SAID CONDUIT SECTIONS ARE MOVED INTO AN ALIGNED AND CONNECTION RELATION BY RELATIVE MOVEMENT OF SAID CONDUIT SECTIONS IN A DIRECTION TRANSVERSE TO SAID LONGITUDINAL AXES, AND SAID SEAL SEAT MEANS HAVING AN ANNULAR CAVITY FORMED IN THE FACE OF SAID SEAL SEAT MEANS WHICH IS OPPOSITE SAID END SEAL FACE, THE RADIAL WIDTH OF SAID CAVITY BEING AT LEAST EQUAL TO THE RADIAL WIDTH OF SAID SEAL PISTON MEANS ANNULAR END LIP, TO THEREBY FORM A THIN FLEXIBLE WALL THAT IS ENGAGED BY AND DEFORMED INTO SEALING RELATION WITH SAID SEAL PISTON MEANS ANNULAR END LIP.