Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1981-04-02
1983-11-22
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
164137, 164410, 164 31, 164 32, 164370, 164397, B23P 1526
Patent
active
044160445
ABSTRACT:
The method of casting a plate type recuperative heat exchange envelope that encloses a hollow space therein in a single casting operation. A sand core with a heat sensitive binder therein defines the hollow space within the envelope. The sand core is supported by end extensions and lateral protuberances which rest on the sides of a sand mold to provide a space therebetween that is subsequently filled with molten metal to comprise an envelope casting. Lateral openings through the envelope casting produced by the lateral protuberances and end openings produced by the end extensions provide passageways for venting gases produced within the sand core during the casting operation, and after completion of the casting operation the same openings in the envelope assist in the removal of the sand core therefrom. The lateral openings are subsequently plugged while the end openings are maintained open to direct the flow of fluid therethrough.
REFERENCES:
patent: 1286375 (1918-12-01), McLachlan
patent: 1657444 (1928-01-01), Prince
patent: 1804400 (1931-05-01), Davis
patent: 3554271 (1971-01-01), Goss
Macler Paul L.
Stockman Richard F.
Goldberg Howard N.
Habelt William W.
Lang Wayne H.
Rising V. K.
The Air Preheater Company, Inc.
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