发明申请
- 专利标题: Switchable Exhale Filter System
- 专利标题(中): 可切换呼气过滤系统
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申请号: US14615829申请日: 2015-02-06
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公开(公告)号: US20150151143A1公开(公告)日: 2015-06-04
- 发明人: Graham Langford
- 申请人: SCOTT HEALTH & SAFETY LIMITED
- 优先权: GB1214088.5 20120806
- 主分类号: A62B7/10
- IPC分类号: A62B7/10 ; A62B23/02 ; A62B18/10 ; A62B9/02 ; A62B18/02
摘要:
A configurable exhale system for a respirator has a first valve assembly disposed within a chamber which is configured to prevent air from flowing through the first valve assembly when an air pressure differential between an upstream side and a downstream side of the first valve assembly is below a first opening pressure. A second valve assembly is disposed within the chamber in fluid communication with the first valve assembly which is configured to prevent air from flowing through the second valve assembly when an air pressure differential between an upstream side and a downstream side of the second valve assembly is below a second opening pressure, which is greater than the first opening pressure. A bypass opening is positioned adjacent the second valve assembly configured to enable air to bypass the second valve assembly with a bypass member positioned adjacent to the bypass opening. The bypass member is movable between two positions with the bypass member blocking the bypass opening in a first position and the bypass member does not block the bypass opening in a second position.
公开/授权文献
- US10220224B2 Switchable exhale filter system 公开/授权日:2019-03-05
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