发明名称 |
Vent stack screen for portable toilet holding tanks |
摘要 |
A vent stack screen for portable toilet holding tanks is provided in the form of a cap designed to fit over the open end of an open air vent stack extending from the holding tank through the roof of a portable toilet. The cap is constructed from a tubular sleeve of plastic material having an inner diameter substantially equal to the outer diameter of the vent stack of a holding tank. The cap includes an inwardly extending annular lip formed at one end. A circular mesh of plastic screen material is secured within the tubular sleeve between the annular lip and a plastic locking ring received within the tubular sleeve.
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申请公布号 |
US6735790(B1) |
申请公布日期 |
2004.05.18 |
申请号 |
US20020320532 |
申请日期 |
2002.12.17 |
申请人 |
WILLSON DONALD V.;WILLSON JUNE |
发明人 |
WILLSON DONALD V.;WILLSON JUNE |
分类号 |
E03C1/12;E03D9/04;E04H1/12;(IPC1-7):E03D9/04 |
主分类号 |
E03C1/12 |
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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