Method of casting a permanent core plumbing product

Details Method of casting a permanent core plumbing product Method of casting a permanent core plumbing product

1994-12-07

1996-12-03

Batten, Jr., J. Reed

Metal founding

Process

Shaping liquid metal against a forming surface

29890141, B22D 1900

Patent

active

055798233

ABSTRACT:
A plumbing part is made from a permanent core and a body cast around the core. The core is formed of a material which meets the requirements as to the permitted leachability of lead and/or other undesirable materials from the core into water flowing through it. The core material has a melting point preferably at least 200.degree. F. above that of the cast body. The core also has a coefficient of expansion which is equal to or less than that of the material forming the cast body.

REFERENCES:
patent: 20395 (1858-05-01), Wood
patent: 1753296 (1930-04-01), McDermott
patent: 2219471 (1940-10-01), Davis
patent: 2795844 (1957-06-01), Liszak
patent: 3658723 (1971-03-01), Sowards

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