Multi-stage evacuating device

Claim 1

A ONE PIECE TWO-STAGE EVACUATING DEVICE, PARTICULARLY A DISPOSABLE DEVICE FOR WITHDRAWING LIQUID AND SOLID MATTER FROM THE MOUTH OF A DENTAL PATIENT, COMPRISING AN ELONGATED SUBSTANTIALLY TUBULAR MEMBER CONSISTING OF A SINGLE PIECE OF DEFORMABLE SYNTHETIC PLASTIC MATERIAL INCLUDING A TUBULAR SECTION HAVING A FIRST END PORTION ARRANGED TO BE CONNECTED TO A SUCTION GENERATING DEVICE AND A SECOND END PORTION; A HOLLOW SECTION HAVING A FIRST END PORTION ADJACENT TO THE SECOND END PORTION OF SAID TUBULAR SECTION AND A SUBSTANTIALLY CUP-SHAPED SECOND END PORTION; AND A FRANGIBLE CONNECTION PORTION, COMPRISING AN ANNULAR PORTION HAVING AT LEAST ONE CIRCUMFERENTIAL GROOVE INTERMEDIATE SAID SECTIONS, FOR INTEGRALLY BUT READILY DETACHABLY CONNECTING SAID SECTIONS WITH EACH OTHER SO THAT, ON DETACHMENT OF SAID SECOND SECTION, THE SECOND END PORTION OF SAID TUBULAR SECTION DEVELOPS A RELATIVELY LARGE OPENING FOR ENTRY OF SOLID PARTICULATE MATTER, SAID HOLLOW SECTION HAVING AT LEAST ONE RELATIVELY SMALL INLET FOR DRAWING LIQUID MATTER INTO SAID TUBULAR SECTION WHEN SAID SECTIONS ARE CONNECTED WITH EACH OTHER.