Bulbous urinary catheter with axial extension means

Claim 1

A CATHETER, IN COMBINATION: A CATHETER PROPER INCLUDING A TUBULAR SLEEVE OF FLEXIBLE MATERIAL HAVING A RADIALLY ENLARGED, A NORMALLY BULBOUS SHAPED RETAINING HEAD AT ITS DISTAL END AND WHICH IS RADIALLY CONTRACTIBLE WITH AXIAL EXTENSION THEREOF FROM WITHIN, AND SAID HEAD BEING PROVIDED WITH DRAINAGE OPENINGS, A TUBULAR COLLAR OR RELATIVELY STIFF MATERIAL COAXIAL WITH SAID SLEEVE AND TO WHICH THE PROXIMAL END THEREOF IS CONNECTED, AND A TUBE SLIDABLY RECEIVED ON SAID COLLAR AND HAVING LENGTH AS TO EFFECT AXIAL EXTENSION OF SAID RETAINING HEAD RESPONSIVE TO ITS DISTAL END BEING MOVED AXIALLY AGAINST THE SAME FROM WITHIN BY AXIAL PUSH FORCE APPLIED TO THE PROXIMAL END OF SAID TUBE, AND COACTING MEANS ON SAID SLEEVE AND TUBE, RESPECTIVELY, FOR RELEASABLY SECURING THE LATTER IN A NORMALLY RETRACTED POSITION WITHIN THE COLLAR AND IN WHICH ITS DISTAL END MAKES SEALING ENGAGEMENT WITH THE CORRESPONDING END OF SAID COLLAR, THE BORE OF THE TUBE WHEN THE LATTER IS IN SAID RETRACTED POSITION PROVIDING A DRAIN PASSAGE FOR LIQUID ENTERING THE SLEEVE THROUGH ITS HEAD OPENINGS.