Preflushing unit for carrying out a preflushing operation in a breathing gas circuit of a closed-circuit respirator

    公开(公告)号:US11738164B2

    公开(公告)日:2023-08-29

    申请号:US16772493

    申请日:2018-11-19

    发明人: Kurt Wenderoth

    摘要: A preflushing unit (10) preflushes a breathing gas circuit (210) of a closed-circuit respirator (200). A basic body (20) has an inlet port (22), feeding breathing gas from a breathing gas supply (220), an outlet port (24) discharging breathing gas into the breathing circuit, and a flow section (32) fluid connecting a valve chamber (30). A valve body (40) with a sealing surface (42) is arranged in the valve chamber (30). An elastomer body (50) with a counter-sealing surface (52) in the valve chamber, fluid tight separates the flow section from a control section (34). The counter-sealing surface acts with a sealing force against the valve body for sealing the flow section. A control port (26) of the basic body provides a controlled feed of breathing gas from the breathing gas supply into the control section for pressure equalization between the flow section and the control section.

    BREATHING SYSTEMS AND METHODS FOR MAKING AND USING SUCH SYSTEMS

    公开(公告)号:US20230092326A1

    公开(公告)日:2023-03-23

    申请号:US17947876

    申请日:2022-09-19

    发明人: Travis Perry

    IPC分类号: A62B9/02 A62B18/04 A62B7/02

    摘要: In some embodiments, the present disclosure provides a method to process high pressure air into low pressure breathing air for one or more sealing and locking helmets and/or one or more air respirators. Other embodiments include a system configured to perform such a method and a manufacturing process of making such a system. In some embodiments, the breathing system automatically fills a local reserve bottle by pressure equalization. In this regard, the secondary supply bottles will fill the backup bottle when the console module operator (CMO) connects the secondary air supply to the system. The backup bottle will then be isolated from depletion during normal operation by means of a check valve to prevent back flow of the emergency cylinder into the secondary air supply. The local reserve bottle will protect against loss of air on any of the high pressure air hoses.