Means for locking replaceable nozzles to fire hydrants
AssigneeMueller Co.
InventorDaniel A. Ellis
Life of this patent
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Abstract
A fire hydrant either of the "wet" barrel type or the "dry" barrel type having an improved hydrant nozzle construction. The barrel of the fire hydrant is provided with an internally threaded boss for receiving a replaceable externally threaded nozzle. Means for locking the nozzle to the boss of the barrel is provided so that the nozzle may not be removed by unauthorized personnel. Sealing means are provided between the nozzle and the boss of the barrel which can not lose its effectiveness due to cold flow and thus will not reduce the gripping effect of the nozzle to the barrel when the nozzle has been threaded therein with an initial torque.
Claims10
In a fire hydrant:
- a barrel having an outwardly extending boss, said boss having a bore therethrough terminating at its outer end portion in a counterbore having a peripheral wall and an outwardly facing radial wall, said bore having interior threads on its inner end portion terminating short of said counterbore;
- a replaceable nozzle having an outwardly and radially extending flange intermediate its outer and inner end portions and arranged to be received in said counterbore, said flange having at least a portion of its peripheral surface spaced radially inwardly a predetermined distance from the peripheral wall of said counterbore, said nozzle having exterior threads on its inner end portion for receiving the interior threads of said boss;
- and,
- a self-tapping screw inserted between the peripheral wall of said counterbore and the portion of the peripheral surface of said flange spaced a predetermined distance from the peripheral wall for locking said nozzle to said boss.
Dependencies are inferred from the claim text.