发明名称 |
DOUBLE WALL FIRE PROOF DUCT |
摘要 |
A composite plastic duct structure comprised of an outer layer of fabric material impregnated with a fire- resistant resin material and an inner liner layer of chemically corrosion resistant resin material impregnated with a fabric material. The invention includes a method wherein multiple wrappings of resin impregnated material are wound on a mandrel to form the inner and outer layers. |
申请公布号 |
CA2042986(A1) |
申请公布日期 |
1991.11.25 |
申请号 |
CA19912042986 |
申请日期 |
1991.05.21 |
申请人 |
SHEA, LAWRENCE E. |
发明人 |
SHEA, LAWRENCE E. |
分类号 |
B32B5/28;B29C53/80;B29C70/16;B32B27/04;F16L9/12;F16L57/04;F16L58/10;(IPC1-7):B32B1/08;B29C53/60;F16L9/16;B29C63/06;B32B1/10 |
主分类号 |
B32B5/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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