Metal working – Method of mechanical manufacture – Obtaining plural product pieces from unitary workpiece
Patent
1978-03-20
1980-05-13
Silverberg, Sam
Metal working
Method of mechanical manufacture
Obtaining plural product pieces from unitary workpiece
29458, 248 49, 264159, F16L 300
Patent
active
042020905
ABSTRACT:
A curvilinear cradle for supporting an object such as a pipe has a durable polyurethane elastomer lining on its concave surface to thereby prevent wear due to movement of the supported object. The cradle also has at least one mounting bracket attached to its convex surface for securing the cradle to a base object such as a pipe H frame.
A method for making the curvilinear support cradle primarily includes the steps of spinning a pipe along its longitudinal axis, bulk injecting a polyurethane elastomer into the spinning pipe to create a centrifugally spin casted coating on the inner surface of the pipe, and cutting the pipe lengthwise to obtain at least two lined cradles. Preferably one or more mounting brackets are attached to the pipe prior to the step of spinning, and the pipe is transversely divided on each side of the mounting brackets to provide a plurality of relatively shorter cradles.
REFERENCES:
patent: 14970 (1820-10-01), Steffens
patent: 2850182 (1958-09-01), Tetyak
patent: 2890724 (1959-06-01), Kennedy
patent: 2891749 (1959-05-01), Heverly
patent: 3774281 (1973-11-01), Eliason
patent: 3807458 (1974-04-01), Royston
patent: 3980262 (1976-09-01), Lee
patent: 4017046 (1977-04-01), Hicks
Econotherm Insulation Company, Inc.
Silverberg Sam
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