Tamper-proof locking system for fire hydrants

Details Tamper-proof locking system for fire hydrants Tamper-proof locking system for fire hydrants

1974-07-23

1976-02-03

Cohen, Irwin C.

Fluid handling

Hydrant type

With casing

81170, 85 9R, 85 45, 137382, 220284, 251291, F16K 3506

Patent

active

039358771

ABSTRACT:
A tamper-proof locking system for a standard fire hydrant, one embodiment of which includes a cap assembly that fits over the valve stem of the hydrant and is fastened thereto. The cap assembly cannot be turned to open the valve except by means of a special wrench which is adjustable to securely grip the assembly. In another embodiment, the system includes a cover assembly which replaces a standard hydrant port cover and cannot be taken off the nipple of the port except by the special wrench.

REFERENCES:
patent: 624628 (1899-05-01), Corey
patent: 2287725 (1942-06-01), Conte
patent: 3070115 (1962-12-01), Jester
patent: 3709249 (1973-01-01), Diaz
patent: 3718350 (1973-02-01), Klein

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