Pop-up sprinkler with slide connection

Claim 1

A POP-UP SPRINKLER HAVING AN AXIALLY SLIDABLE CONNECTION AND COMPRISING: (A) A SPRINKLER HOUSING INCLUDING A SLEEVE HAVING MEANS AT ITS LOWER END FOR CONNECTION TO A WATER SUPPLY; (B) A COLLAR SECURED TO THE UPPER END OF SAID SLEEVE AND HAVING AN ELONGATED DOWNWARDLY DIVERGING BORE, AND AXIALLY EXTENDING KEY SLOT IN SAID BORE, AND A SEAT AT ITS LOWER END; (C) A FLOW TUBE EXTENDING DOWNWARDLY THROUGH SAID COLLAR AND INTO SAID SLEEVE FOR AXIAL MOVEMENT BETWEEN A RETRACTED AN AN EXTENDED POSITION; (D) A LONGITUDINAL KEY RIB ON SAID FLOW TUBE FITTING SAID KEY SLOT TO RESTRAIN SAID FLOW TUBE AGAINST ROTATION; (E) A ROTATABLE SPRINKLER HEAD MOUNTED ON SAID FLOW TUBE; (F) SEALING MEANS AT THE LOWER END OF SAID FLOW TUBE ENGAGEABLE WITH SAID SEAT WHEN SAID FLOW TUBE IS EXTENDED; (G) AND TAPERED GUIDE RIBS ON SAID FLOW TUBE EXTENDING AXIALLY FROM SAID SEALING MEANS FOR MATING ENGAGEMENT WITH THE TAPERED BORE OF SAID COLLAR, WHEN SAID FLOW TUBE IS EXTENDED, FOR HOLDING SAID FLOW TUBE IN COAXIAL RELATION WITH SAID COLLAR; (H) SAID COLLAR AND FLOW TUBE FORMING A FLUSHING PASSAGE BETWEEN AND AROUND SAID GUIDE RIBS THEREBETWEEN, WHEN SAID FLOW IS RETRACTED.