Tamperproof construction for hydrant actuating nut

Details Tamperproof construction for hydrant actuating nut Tamperproof construction for hydrant actuating nut

1989-10-30

1990-06-26

Walton, George L.

Fluid handling

Hydrant type

With casing

1373825, 137800, 220 85P, 220284, 251291, F16K 3506, E03B 906

Patent

active

049363360

ABSTRACT:
A tamperproof construction for preventing actuation of the actuating nut of a fire hydrant comprising a nut actuating body for receiving the hydrant nut in turning relationship, set screws locking the nut actuating body to the actuating nut, a shroud permanently secured on the nut actuating body by means of a snap ring so that it covers the set screws but is rotatable on the nut actuating body, a bore in the shroud for permitting selective access to the set screws, a key-operated plug in the bore, a cap permanently and rotatably mounted on an end of the nut actuating body which protrudes through an opening in the shroud, and a limited axial portion of the nut actuating body exposed between the cap and shroud for receiving a specialized wrench.

REFERENCES:
patent: Re27616 (1973-04-01), Diaz
patent: 2576631 (1951-11-01), Mueller et al.
patent: 2762386 (1956-09-01), Fogle
patent: 3070115 (1962-12-01), Jester
patent: 3450148 (1969-06-01), Mongelluzzo et al.
patent: 3453897 (1969-07-01), Adinolfi
patent: 3709249 (1973-01-01), Diaz
patent: 3840041 (1974-10-01), McMurray
patent: 3935877 (1976-02-01), Franceschi
patent: 4033372 (1977-07-01), Bowman
patent: 4566481 (1986-01-01), Leopold, Jr. et al.
patent: 4633896 (1987-01-01), Bainbridge et al.
patent: 4716922 (1988-01-01), Camp

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