Metal working – Method of mechanical manufacture – Shaping by direct application of fluent pressure
Patent
1989-03-01
1990-06-26
Silbaugh, Jan H.
Metal working
Method of mechanical manufacture
Shaping by direct application of fluent pressure
295272, 264228, 264262, 264263, 264512, 264516, 264570, B23P 1700, B28B 130, B28B 148, B29C 4514
Patent
active
049360060
ABSTRACT:
A method for making a prestressed concrete article including a cylindrical body surrounded by a cylindrical jacket by joining end walls to the jacket overlying the ends of the article and placing gasket rings between the article and the end walls. A hardenable medium is injected between the jacket and the concrete article and generates a sufficient pressure so as to outwardly bulge the jacket, drawing the end walls together thereby compressing the gaskets.
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General Atomics
Kutach Karen D.
Silbaugh Jan H.
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