发明名称 Ribbed core dual wall structure
摘要 An elongated composite tube made up of an inner tube 42 and an outer tube 44 (see FIG. 3) with a plurality of elongated helical ribs disposed between the inner tube and the outer tube in a supporting relationship to both. A slinky like toy made from the composite tube is also disclosed, as is a method of making both.
申请公布号 US2002125607(A1) 申请公布日期 2002.09.12
申请号 US20020139208 申请日期 2002.05.07
申请人 HERRINGTON F. JOHN 发明人 HERRINGTON F. JOHN
分类号 B29C47/00;B29C47/04;B29C47/06;B29C47/20;B29C47/34;B29C53/14;F16L9/19;(IPC1-7):B29C47/06;B32B31/30 主分类号 B29C47/00
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