Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1993-07-30
1995-01-10
Vo, Peter Dungba
Metal working
Method of mechanical manufacture
Assembling or joining
29463, 295272, 29773, 29801, 29DIG11, 29DIG48, 72347, 220565, 427232, B23P 1904, B65D 9002, B05D 722, B21D 2220
Patent
active
053795075
ABSTRACT:
A tank construction including an outer shell of steel material comprised of two half members welded together. The half members are formed by a deep drawing process. An inner shell of non-corrosive material is cast inside the outer shell by a rotational casting procedure with the external surface of the inner shell located adjacent the internal surface of the outer shell. The inner shell of non-corrosive material provides a substantially leak-fight liner for the outer shell to thus prevent contact between the contents of the tank and the outer shell. The rotational casting of the inner shell inside the outer shell is accomplished by charging the outer shell with a non-corrosive material and then subjecting the outer shell to a rotational casting movement while heat is applied to the outer shell. The outer shell serves as a mold for the inner shell wherein the mold (outer shell) becomes a permanent part of the completed tank.
REFERENCES:
patent: Re24187 (1956-07-01), Burwell
patent: 3473687 (1969-10-01), Larsen et al.
patent: 4032257 (1977-05-01), Wright et al.
patent: 4491717 (1985-01-01), Geffroy et al.
patent: 4625892 (1986-12-01), Carlin, Jr.
Dungba Vo Peter
Puerner Paul R.
State Industries, Inc.
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