Check valve
CN309943672SActive Publication Date: 2026-04-24SHANGHAI JINAN BUILDING DECORATION ENG CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Designs(China)
- Current Assignee / Owner
- SHANGHAI JINAN BUILDING DECORATION ENG CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-04-24
Smart Images
Figure 000007_ABST
Abstract
1. Name of the product in this design: Check valve. 2. Purpose of this design: To exhaust fumes in a smoke exhaust duct and prevent backdraft and reverse flow of cold air. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.
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