Stainless steel security cap for fire hydrants

Details Stainless steel security cap for fire hydrants Stainless steel security cap for fire hydrants

1993-06-21

1995-01-24

Bryant, III, James E.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

138 96T, 137296, F16L 5510, E03B 906

Patent

active

053834950

ABSTRACT:
A security hydrant cap having a domed body adapted to be removed only with a specialized tool, and a slip ring surrounding substantially all of the body and mounted thereto so as to be free to rotate about the body. The slip ring and, preferably, the body are formed of stainless steel. Preferably, the slip ring and body are made of a 400 series stainless steel, heat treated to a Rockwell "C" hardness of approximately 43-47.

REFERENCES:
patent: 3814135 (1974-06-01), Helzer et al.
patent: 3929152 (1975-12-01), Graham
patent: 3935877 (1976-02-01), Franceschi
patent: 3963054 (1976-06-01), Martin
patent: 4141574 (1979-02-01), Stansifer et al.
patent: 4356839 (1982-11-01), Voynovich
patent: 4566481 (1986-01-01), Leopold et al.
patent: 4651771 (1987-03-01), Borenstein et al.
patent: 4727900 (1988-03-01), Dooling et al.
patent: 5033501 (1991-07-01), Stehling

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