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US 12,303,644 B2Granted
Speaking valve
AssigneeAndreas Fahl Medizintechnik—Vertrieb GmbH
InventorAndreas Fahl
Life of this patent
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Abstract
The invention relates to a speaking valve, having at least a housing and an actuation means for actuating the speaking valve, the actuation means having a distal pressure surface that has a first partial surface and a second partial surface, the first partial surface having a first average roughness (Ra1), and the second partial surface having a second average roughness (Ra2), the first average roughness and the second average roughness differing by about at least 0.1 μm.
Claims6
A speaking valve comprising:
- at least a housing and an actuation structure for actuating the speaking valve, the actuation structure having a distal pressure surface comprising a first partial surface and a second partial surface, said first partial surface having a first average roughness (Ra1) and said second partial surface having a second average roughness (Ra2), wherein said first average roughness (Ra1) and said second average roughness (Ra2) differ by at least 0.1 μm, the first partial surface and the second partial surface are concentric and coplanar to each other.
Dependencies are inferred from the claim text.