Fluid handling – Hydrant type – With casing
Patent
1979-04-18
1981-07-28
Schwadron, Martin P.
Fluid handling
Hydrant type
With casing
220203, 220316, 137800, E03B 906
Patent
active
042805252
ABSTRACT:
A tamperproof cap assembly for a hydrant having a valve stem rod which in one embodiment is displaceable in elevation within the hydrant housing without rotation of the valve stem rod about its axis. The assembly includes a cap adapted to cover the outlet port in the hydrant housing. The cap is provided with a stem. A locking means secured to the valve stem rod engages the cap stem when the valve stem rod is in a first position and the cap stem is displaced toward the valve stem rod. The locking means releases the cap stem when the valve stem rod is displaced in elevation from the first position to a second position without rotation of the valve stem rod about its axis. The cap is provided with a pair of unthreaded facing annular walls which define an annular channel for receiving the hydrant nozzle. In another embodiment, the valve stem rod is rotatable, and a locking means secured to the rod engages the cap stem when the rod is in a first angular position and releases the stem when the rod is rotated away from the first angular position.
REFERENCES:
patent: 468782 (1892-02-01), Brentano
patent: 556500 (1896-03-01), Fox
patent: 969905 (1910-09-01), Reed
patent: 3914966 (1975-10-01), Bello
patent: 4062375 (1977-12-01), Byrner
patent: 4164221 (1979-08-01), Bentley et al.
Center Compression Lock Company, Inc.
Schwadron Martin P.
Walton G. L.
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