Metal founding – Process – Shaping liquid metal against a forming surface
Reexamination Certificate
2006-02-14
2006-02-14
Johnson, Jonathan (Department: 1725)
Metal founding
Process
Shaping liquid metal against a forming surface
C164S120000, C164S061000
Reexamination Certificate
active
06997234
ABSTRACT:
An apparatus and method for enhanced gravity casting wherein a portion of the mold is maintained in pressure contact with molten metal as it solidifies to allow the mold surface to follow the contraction of the solidifying metal. A further feature of the invention is the use of an air clearance between mold parts that is sufficient to allow air to escape but insufficient to allow molten metal to flow therepast.
REFERENCES:
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patent: 5244033 (1993-09-01), Ueno
patent: 6564853 (2003-05-01), Ratte
patent: 321596 (1957-05-01), None
patent: 2504424 (1982-10-01), None
patent: 1257963 (1971-12-01), None
Jacobson & Johnson
Johnson Jonathan
Tran Len
Water Gremlin Company
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