Fluid handling – Hydrant type – Protection against freezing
Patent
1979-01-23
1980-10-14
Cohan, Alan
Fluid handling
Hydrant type
Protection against freezing
138DIG11, 251366, E03B 908, F16K 2700
Patent
active
042275440
ABSTRACT:
A fire hydrant having a generally elbow-shaped hydrant shoe with an improved interior bowl configuration and an improved hydrant valve for minimizing head or flow loss of the fire hydrant between the inlet opening of the shoe and the outlet nozzle positioned on the upper portion of the hydrant barrel. The interior bowl of the shoe, adjacent its inlet, is provided with a diverging transitional surface of rotation having a generally part frusto conical shape and, adjacent its outlet, is provided with a converging transitional surface of rotation having a generally part frusto conical shape, the transitional surfaces of rotation merging with the shoe's part spherical chamber. The valve element of the hydrant valve is provided with a generally conically shaped converging surface on its downstream side which when open defines with said converging transitional surface of rotation and with a portion of said diverging surface of rotation an annular passage for the flow of fluid through the hydrant shoe into the hydrant barrel, the annular passage varying in radial section from a diverging radial section to a converging radial section.
REFERENCES:
patent: 149628 (1874-04-01), Allen
patent: 242243 (1881-05-01), Adams
patent: 1021537 (1912-03-01), Lawnin
patent: 1091210 (1914-03-01), Gauntt
patent: 1349062 (1920-08-01), Goldberg
patent: 2083319 (1937-06-01), Daviet
patent: 2626629 (1953-01-01), Mueller et al.
patent: 3219054 (1965-11-01), Elder et al.
patent: 3980096 (1976-09-01), Ellis et al.
patent: 4177826 (1979-12-01), Luckenbill
Cohan Alan
Gerard Richard
Mueller Co.
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