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Class Information
Number: 164/400
Name: Metal founding > Core centering or supporting means > Collapsible or knock down type core bar
Description: Apparatus wherein the core supporting means is intended to extend inside the core and is constructed to allow a break down or reduction in volume of the means.

Patents under this class:

Patent Number Title Of Patent Date Issued
4217949 Core for the making of castings equipped with slender ducts Aug. 19, 1980
3945429 Decomposable passage-way forming core Mar. 23, 1976
3933453 Flame hydrolysis mandrel and method of using Jan. 20, 1976

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