Lip seals

Claim 1

A SEAL FORMED FROM ANNULAR ELEMENTS AND COMPRISING A PLASTIC SEALING ELEMENT AND A SEALING ELEMENT MOUNTING MEMBER, SAID SEALING ELEMENT MOUNTING MEMBER INCLUDING A SEALING ELEMENT MOUNTING GROOVE WHICH IS RADIALLY DIRECTED AND POSITIONED ALONG A PERIPHERY OF SAID MOUNTING MEMBER, SAID GROOVE HAVING A RADIALLY DIRECTED MOUTH PORTION THROUGH WHICH A PERIPHERAL PORTION OF SAID SEALING ELEMENT IS RECEIVED AS IT PROJECTS INTO SAID GROOVE, SAID MOUTH PORTION BEING DEFINED BY A RADIALLY EXTENDING LEG PORTION ON ONE SIDE AND AN AXIALLY RAISED PORTION ON THE OPPOSITE SIDE, SAID RAISED PORTION BEING SLIGHTLY SPACED RADIALLY FROM A TERMINAL POINT ON SAID LEG PORTION, PRESSURE FLANGE MEANS HAVING A FIRST PERIPHERAL PORTION POSITIONED IN THE MOUTH PORTION OF SAID GROOVE, SAID PRESSURE FLANGE MEANS BEING OF GREATER RADIAL DIMENSION THAN SAID RAISED PORTION, SAID PRESSURE FLANGE MEANS HAVING A RELATIVELY INFLEXIBLE PORTION ON A RADIALLY SPACED SECOND PERIPHERAL PORITON, AND A FLEXIBLE PORTION ON THE FIRST PERIPHERAL PORTION RECEIVED IN THE MOUTH PORTION OF SAID GROOVE, SAID RADIALLY EXTENDING LEG PORTION ENGAGING SAID PRESSURE FLANGE MEANS ALONG AN ANNULAR CLAMPING FORCE AREA ADJACENT SAID FIRST PERIPHERAL PORTION TO URGE SAID SEALING ELEMENT AGAINST SAID AXIALLY RAISED PORTION THEREBY DEFINING A SECOND ANNULAR CLAMPING FORCE AREA ADJACENT SAID SECOND PERIPHERAL PORTION, SAID ANNULAR FORCE AREAS BEING RADIALLY SPACED EACH FROM THE OTHER TO URGE SAID SEALING ELEMENT IN ONE DIRECTION ALONG A RADIALLY SPACED SECOND PERIPHERAL PORTION OF SAID PRESSURE FLANGE MEANS OUTSIDE OF SAID MOUTH PORTION THEREBY DEFINING AN ANNULAR BEND AREA CONTIGUOUS WITH THE RADIALLY SPACED SECOND PERIPHERAL PORTION FOR FREE FLEXING OF SAID SEALING ELEMENT, THE TOTAL VOLUME OF SAID GROOVE BEING AT LEAST EQUAL TO THE COMBINED VOLUME OF THE PORTION OF SAID PRESSURE FLANGE MEANS AND SAID SEALING ELEMENT CLAMPINGLY RECEIVED THEREIN.