Geoffrey Crumblin,Craig David Edwards,Daniel Robert Judson,Bryony Louise Marshall
申请号：
US11922140
公开号：
US09878117B2
申请日:
2006.06.05
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A swivel elbow for a mask assembly includes an elbow adapted to be provided to the mask assembly and a swivel detachably connected to the elbow. The elbow includes a plurality of spaced apart rings that provide a controlled clearance between the elbow and an interior surface of the swivel.
