Method of making a three-way fire hydrant

Details Method of making a three-way fire hydrant Method of making a three-way fire hydrant

1993-11-23

1994-12-20

Lin, Kuang Y.

Metal founding

Process

Shaping a forming surface

164 29, 164 30, 164137, B22C 924

Patent

active

053738896

ABSTRACT:
A three-way wet barrel fire hydrant includes an enlarged intermediate barrel section, which effectively reduces pressure loss in the fire hydrant. The hydrant barrel is formed by an improved sand molding process which requires the mold parting line of the barrel to be selected to coincide with the centerline of the upper nozzle opening. In this manner, a pattern which forms the sand mold may be removed cleanly from the molding sand, thereby eliminating the need of multiple side cores during the casting process.

REFERENCES:
patent: Re16168 (1925-09-01), Charland
patent: 28391 (1860-05-01), Meigs
patent: 2054561 (1936-09-01), Greenberg
patent: 4000753 (1977-01-01), Ellis
patent: 4141574 (1979-02-01), Stansifer et al.
patent: 4440190 (1984-04-01), Borbe

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