Title:
MICRO-RESISTANCE AND HIGH-SENSITIVITY CHECK VALVE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/073464
Kind Code:
A1
Abstract:
A micro-resistance and high-sensitivity check valve (600) and a manufacturing method therefor, relating to the field of check valves for air breathing pipes and the like. A sealing surface, a support and fixing bar (634), and a support blocking bar (637) in a check valve main cylinder (630) are cut into concave surfaces having the same curvature; the central axis of an elastic valve sheet (680) is fixed on the support and fixing bar (634); two valve sheets can be lifted up and opened under a slight acting force, and air can smoothly pass through; when there is no certain external acting force, the elastic valve sheet having two bent sides recovers to be straight; the elastic valve sheets are blocked by a concave sealing curved surface (636) when recovering to be straight and are snap fit with the curved surface to seal a pipe. The check valve (600) adopts elastic thin valve sheets (681), and the breathing resistance is low; the concave curved surface is adopted, the valve sheets implement high-sensitivity rebound sealing, and the noise is low. The check valve adopts a cylindrical design and is mainly used for opening an air passage in one way, and pipes on two sides of a respirator are respectively provided with check valves which are mutually inverted, so that one side is opened while the other side is closed during inhalation; during exhalation, the opposite is true, so that the one-way flow of breathing air is realized.
More Like This:
| WO/1998/011930 | PRESSURE SENSITIVE FLOW CONTROL VALVE |
| WO/2008/101302 | DEMAND VALVE FOR BREATHING APPARATUS |
Inventors:
LI ZONGFA (CN)
Application Number:
PCT/CN2021/122469
Publication Date:
April 14, 2022
Filing Date:
September 30, 2021
Export Citation:
Assignee:
CHINA INNOVATION STATE WEALTHY BIJING SCIENCE AND TECH DEVELOPMENT RESEARCH INSTITUTE CO LTD (CN)
International Classes:
A62B9/02; A61M16/20; A62B18/10; F16K7/17; F16K15/16
Foreign References:
| CN210020902U | 2020-02-07 | |||
| CN111182938A | 2020-05-19 | |||
| CN111529854A | 2020-08-14 | |||
| CN206350861U | 2017-07-25 | |||
| CN107096106A | 2017-08-29 | |||
| US20160074682A1 | 2016-03-17 | |||
| US20190217133A1 | 2019-07-18 |
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