Cocks for fluids

Claim 1

A COCK OR FAUCET FOR FLUIDS COMPRISING A FIXED BODY HAVING WALLS INCLUDING A CIRCUMFERENTIAL WALL DEFINING A CHAMBER OF CIRCULAR CROSS SECTION, AND PROVIDED WITH AT LEAST TWO FLUID PASSAGES ONE OF WHICH EMBODIES A PORT FORMED IN SAID CIRCUMFERENTIAL WALL OF THE CHAMBER, A FLEXIBLE SLEEVE DISPOSED COAXIALLY IN THE INTERIOR OF SAID CHAMBER, MEANS FOR COUPLING SAID SLEEVE TO SAID FIXED BODY INCLUDING MEANS TO PREVENT ANGULAR AND AXIAL DISPLACEMENT OF THE SLEEVE IN SAID CHAMBER, A RIGID CAM DISPOSED IN THE INTERIOR OF SAID SLEEVE AND SUBSTANTIALLY FILLING SAID SLEEVE AND SUPPORTING AND HAVING AREA CONTACT WITH SAID SLEEVE, SAID CAM HAVING A PROFILE SELECTED SO THAT ROTATION OF SAID CAM ABOUT THE AXIS OF SAID CHAMBER CAUSES A DEFORMATION OF SAID SLEEVE SO AS TO OPEN SAID PORT FORMED IN SAID CIRCUMFERENTIAL WALL AND PRODUCES APPLICATION OF A PORTION OF SAID SLEEVE AGAINST SAID PORT TO CLOSE SAID PORT, SAID FLEXIBLE SLEEVE COMPRISING AN INTERNAL ELEMENT FOR REDUCING FRICTION AND AN EXTERNAL CLOSURE ELEMENT APPLIED TO THE OUTER SURFACE OF SAID INTERNAL ELEMENT FACING SAID PORT, SAID INTERNAL ELEMENT BEING OF A FLEXIBLE MATERIAL HAVING A LOW COEFFICIENT OF FRICTION AND BEING COUPLED TO SAID BODY BY SAID COUPLING MEANS, AND SAID EXTERNAL ELEMENT BEING OF A FLEXIBLE MATERIAL HAVING GREAT ELASTICITY, AND MEANS ON THE EXTERIOR OF SAID BODY FOR ROTATING SAID CAM.