Fluid handling – Hydrant type – With casing
Patent
1987-06-05
1988-01-05
Walton, George L.
Fluid handling
Hydrant type
With casing
70276, 81125, 811761, 137382, 1373848, 192 84PM, 220 85P, 220284, 251 65, 251 89, 251291, 403 1, 403DIG1, F16K 3108, F16K 3516
Patent
active
047169222
ABSTRACT:
A device is provided, designed to prevent unauthorized operation of fire hydrants by completely concealing the hydrant operating nut and weather shield within freely rotating sleeves, thereby rendering the hydrant inoperable. The hydrant is made operable by the use of a specially designed self-contained magnetic operating wrench. The hydrant again becomes inoperable when the magnetic wrench is disengaged. The device is externally mounted for easy, quick field installation with common tools, and requires no modification of the internal hydrant mechanism. The device is designed to be used on all hydrant makes and models having an operating nut extending vertically above the hydrant bonnet.
REFERENCES:
patent: 2118233 (1938-05-01), Ruggio
patent: 3453655 (1969-07-01), Quinones et al.
patent: 3556131 (1971-01-01), Diaz
patent: 3626961 (1971-12-01), Quinones
patent: 3840041 (1974-10-01), McMurray
patent: 3916939 (1975-11-01), Gillard
patent: 4369807 (1983-01-01), Camp
patent: 4390038 (1983-06-01), Salvato
patent: 4566481 (1986-01-01), Leopold, Jr. et al.
patent: 4620428 (1986-11-01), Kopesky
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