Non-reflux valves

Claim 1

A UNIDIRECTIONAL VALVE FOR ENABLING THE FLOW OF FLUID IN ONLY ONE DIRECTION, COMPRISING, A CASING HAVING A PASSAGE THERETHROUGH FOR THE FLOW OF SAID FLUID, SAID CASING HAVING AN INTEGRAL CONSTRICTED PORTION TERMINATING IN A SEATING AT ONE END THEREOF AND A SHOULDER AT THE OTHER END THEREOF, SAID CONSTRICTED PORTION FORMING A GUIDEWAY IN SAID CASING, A MOVABLE EGG SHAPED VALVE MEMBER, SAID VALVE MEMBER HAVING A PLURALITY OF FLEXIBLE VANE LIKE APPENDAGES DEPENDENT THEREFROM, SAID VANE LIKE APPENDAGES HAVING A FLAT RECTANGULAR CROSS-SECTION EXTENDING RADIALLY TO THE AXIS OF FLUID, SAID VALVE MEMBER NORMALLY RESTING ON THE SEATING TO PRECLUDE FLUID FLOWING IN ONE DIRECTION AND MOVING FROM SAID SENSING RESPONSIVE TO FLUID FLOW IN THE OTHER DIRECTION, SAID APPENDAGES EXTENDING THROUGH SAID CONSTRICTED PORTION WITH THE OUTER EDGES OF SAID APPENDAGES BEING IN SLIDING ENGAGEMENT WITH THE INNER WALLS OF SAID CONSTRICTED PORTION SO THAT THE TRAVEL OF SAID VALVE MEMBER IS RESTRICTED TO A SUBSTANTIALLY STRAIGHT LINE MOTION, SAID APPENDAGES TERMINATE IN LATERALLY PROJECTING CLAWS, SAID CLAWS LYING IN VERTICAL ALIGNMENT WITH SAID CONSTRICTION AND HELICAL COIL SPRING MEANS FLOATING BETWEEN SAID CLAWS AND SAID SHOULDER WITHOUT BEING ANCHORED TO EITHER SAID CLAWS OR SAID SHOULDER, WHEREBY SAID EGG SHAPE SAID VANE LIKE APPENDAGES AND SAID FLOATING SPRING COOPERATE TO SUBSTANTIALLY ELIMINATE ROTATIONAL MOVEMENT OF THE VALVE.