| 摘要 |
<p>A venting valve (10) comprises a cover (20) including a flow path (26) in fluid communication with an evaporative emissions system (16) and a liquid discriminating and vapor permeable membrane (22) connected to the cover (20). At least a portion of the outer surface of the membrane (22) comprises a plurality of alternating curved crests (30) and valleys (32). In other embodiments, the membrane (48) comprises a first and second layer (50, 52) defining a gap (54) therebetween, wherein at least a portion of the membrane (48) is spirally wound. In other embodiments, the venting valve (10) includes at least one protrusion (62) configured to support and shape the membrane (58), wherein at least a portion of the membrane (58) is curved.</p> |
