Adjustable length vacuum cleaner wand

Claim 1

A FLUID CONVEYING DEVICE COMPRISING: AN IMPERFORATE INNER CONDUIT HAVING AN ENLARGED SHORT LONGITUDINAL END SECTION WITH A PERIPHERAL GROOVE THEREIN; A SEALING MEMBER SITUATED IN SAID GROOVE; AN ELONGATED MEMBER MOUNTED ON THE OUTER SURFACE OF SAID INNER CONDUIT, SAID ELONGATED MEMBER INCLUDING AN ELONGATED SECTION SPACED FROM THE SURFACE OF SAID INNER CONDUIT AND EXTENDING A SUBSTANTIAL DISTANCE ALONG THE LENGTH OF THE INNER CONDUIT, SAID ELONGATED SECTION HAVING A SERIES OF APERTURES THERETHROUGH, SAID SERIES EXTENDING A SUBSTANTIAL DISTANCE ALONG THE LENGTH OF SAID ELONGATED SECTION AN OUTER CONDUIT TELESCOPICALLY RECEIVING FOR SLIDING MOVEMENT THEREWITHIN SAID INNER CONDUIT INCLUDING ITS ENLARGED END SECTION AND SAID ELONGATED MEMBER, THE ENLARGED END SECTION AND INNER CONDUIT LEADING THE TELESCOPIC ADVANCEMENT OF SAID INNER CONDUIT AND THE ELONTAGED MEMBER THROUGH SAID OUTER CONDUIT STARTING FROM NEXT TO A SHORT LONGITUDINAL END SECTION OF THE OUTER CONDUIT WHILST SAID SEALING MEMBER CONTINUOUSLY PROVIDES AN AIRTIGHT SEAL BETWEEN BOTH SAID CONDUITS, THE SHORT END SECTION OF SAID OUTER CONDUIT HAVING FIRST AND SECOND LONGITUDINALLY SPACED APERTURES THERETHROUGH; A RESILIENT LATCH MOUNTED ON THE END SECTION OF SAID OUTER CONDUIT, SAID LATCH INCLUDING A TONGUE, A TAB AND A LIFTING MEMBER, SAID TONGUE NORMALLY PROTRUDING THROUGH SAID FIRST APERTURE AND THROUGH ANY ONE APERTURE OF SAID SERIES WHICH MAY BE SITUATED IN REGISTER WITH SAID FIRST APERTURE WHEREBY SAID CONDUITS MAY BE LATCHED IN ANY ONE OF A PLURALITY OF TELESCOPIC POSITIONS, SAID LIFTING MEMBER BEING OPERABLE TO WITHDRAW SAID TONGUE FROM SAID ONE APERTURE OF SAID SERIES TO PERMIT THE TELESCOPIC RESPOSITIONING OF SAID CONDUIS, SAID TAB PROTRUDING THROUGH SAID SECOND APERTURE TO ENGAGE THE ENLARGED END SECTION IS NEXT TO SAID END SECTION WHEN SAID ENLARGED END SECTION IS NEXT TO SAID END SECTION OF SAID OUTER CONDUIT TO PREVENT WITHDRAWAL OF THE INNER CONDUIT FROM THE OUTER CONDUIT, SAID SECOND APERTURE AND TAB BEING LATERALLY OFFSET FROM SAID FIRST APERTURE AND TONGUE TO PERMIT SAID ELONGATED MEMBER TO MOVE UNOBSTRUCTEDLY INTO AND OUT OF SAID OUTER CONDUIT.