发明授权
- 专利标题: Sound absorbing pipe
- 专利标题(中): 吸音管
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申请号: US46687申请日: 1987-05-07
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公开(公告)号: US4899846A公开(公告)日: 1990-02-13
- 发明人: Naoyuki Furuta , Shinta Yamamura
- 申请人: Naoyuki Furuta , Shinta Yamamura
- 申请人地址: JPX Fukushima
- 专利权人: Nitto Boseki Co., Ltd.
- 当前专利权人: Nitto Boseki Co., Ltd.
- 当前专利权人地址: JPX Fukushima
- 优先权: JPX61-75054[U] 19860519
- 主分类号: E01F8/00
- IPC分类号: E01F8/00 ; G10K11/16
摘要:
A sound absorbing pipe comprising a circumferential wall, open portions disposed at regular intervals in the circumferential wall having a predetermined area ratio and sound absorbing material disposed in a hollow formed in an interior portion of the pipe.
公开/授权文献
- US5979535A Methods for semi-melting injection molding 公开/授权日:1999-11-09
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