Upright vacuum cleaner

Claim 1

IN AN UPRIGHT VACUUM CLEANER, A CASING HAVING AN INLET END ASSEMBLY COMPRISING A CUP-SHAPED MEMBER MADE OF PLASTIC AND HAVING A THIN PERIPHERAL WALL TAPERING TOWARDS ONE END, SAID ONE END HAVING A GENERALLY CYLINDRICAL INLET TUBE EXTENDING AXIALLY THERETHROUGH CONCENTRICALLY INWARDLY OF SAID WALL, AND PLURAL CIRCUMFERENTIALLY SPACED RIBS EXTENDING RADIALLY INWARDLY FROM SAID PERIPHERAL WALL AND ENGAGING SAID INLET TUBE, EACH RIB ON THE SIDE FACING THE OTHER END OF SAID INLET END ASSEMBLY INCLUDING A RADIALLY EXTENDING PORTION AXIALLY INWARDLY OF ONE END OF SAID TUBE AND TOGETHER WITH ONE ANOTHER FORMING SPACED PARTS ON A COMMON RADIAL PLANE, AND A COLLAR ON SAID ONE END OF SAID TUBE FORMING A RADIALLY OUTWARDLY EXTENDING CIRCUMFERENTIALLY CONTINUOUS ANNULAR SHOULDER SPACED AXIALLY FROM SAID PLANE, THEREBY TO FORM AN ANNULAR RECESS INWARDLY OF THE END OF SAID INLET TUBE, AND A DIRT-SEPARATING BAG HAVING ELASTIC SHEET FORM MEANS FORMING AN INLET OPENING OF LESSER DIAMETER THAN SAID SHOULDER, AND A STIFF DISK CARRYING SAID ELASTIC SHEET FORM MEANS AND SIZED TO CONFORM TO THE SHAPE PRESCRIBED BY SAID PLANE, AND HAVING AN OPENING LARGER THAN SAID ANNULAR SHOULDER, SAID ELASTIC SHEET FORM MEANS SNAPPING ON SAID COLLAR INTO SAID RECESS WHEN SAID DISK IS ENGAGED AGAINST SAID RIBS.