Bearing and sealing means

Claim 1

A ROTARY MECHANISM INCLUDING A HOLLOW OUTER BODY HAVING AN INTERNAL PERIPHERAL WALL, AN INTERNAL BODY POSITIONED WITHIN SAID OUTER BODY AND HAVING AN EXTERNAL PERIPHERAL WALL RADIALLY SPACED FROM AT LEAST PORTIONS OF SAID INTERNAL PERIPHERAL WALL TO FORM A WORKING CHAMBER, SAID INNER AND OUTER BODIES EACH HAVING A PAIR OF AXIALLY SPACED END WALLS RESPECTIVELY CONNECTED BY SAID EXTERNAL AND INTERNAL PERIPHERAL WALLS AND ENCLOSING THE ENDS OF SAID WORKING CHAMBER, AT LEAST ONE END OF SAID WORKING CHAMBER HAVING ASSOCIATED INNER AND OUTER BODY END WALLS WHEREIN SAID OUTER BODY END WALL AT LEAST PARTIALLY OVERLAYS SAID INNER BODY END WALL, SAID INNER AND OUTER BODIES BEING RELATIVELY ROTATABLE AND INCLUDING MEANS TO VARY THE PRESSURE IN SAID WORKING CHAMBER UPON RELATIVE ROTATION, AND A SEALING ELEMENT FOR AT LEAST SAID ONE END OF SAID WORKING CHAMBER COMPRISING A FLEXIBLE WAFER AXIALLY POSITIONED BETWEEN SAID INNER AND OUTER BODY END WALLS, SAID WAFER BEING SECURED TO ONE OF SAID INNER AND OUTER BODY END WALLS AND HAVING A FREE ANNULAR EDGE PORTION BIASED AGAINST THE OTHER OF SAID INNER AND OUTER BODY END WALLS BY THE PRESSURE IN SAID WORKING CHAMBER.