发明授权
US08365723B2 Filter cartridge having cone of visibility for end-of-service-life-indicator (ESLI)
有权
带有终端使用寿命指示器（ESLI）可视化锥度的滤芯
- 专利标题： Filter cartridge having cone of visibility for end-of-service-life-indicator (ESLI)
- 专利标题（中）： 带有终端使用寿命指示器（ESLI）可视化锥度的滤芯
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申请号： US12470920申请日： 2009-05-22
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公开(公告)号： US08365723B2公开(公告)日： 2013-02-05
- 发明人: Richard J. Poirier , Thomas W. Holmquist-Brown , Neal A. Rakow
- 申请人： Richard J. Poirier , Thomas W. Holmquist-Brown , Neal A. Rakow
- 申请人地址： US MN St. Paul
- 专利权人： 3M Innovative Properties Company
- 当前专利权人： 3M Innovative Properties Company
- 当前专利权人地址： US MN St. Paul
- 主分类号： A62B9/00
- IPC分类号： A62B9/00
摘要：
A filter cartridge 12 that includes a filter material 42, an end-of-service-life-indicator 40, a cartridge housing 22, and a window 38. The filter material 42 and ESLI 40 are disposed in the housing, and the ESLI 40 may be viewed through the window 38. The window 38 is configured such that the ESLI 40 can only be seen within a cone defined by an angle θ of 20 to 70 degrees. The limited viewing range precludes reader error when examining the ESLI for color change.