Jeremy Patrick EVANS,Terry CHUNG,Jordan LINN,David Shao LING,Joshua STOIA
申请号：
US15942847
公开号：
US20180236148A1
申请日:
2018.04.02
申请国别(地区):
US
年份:
2018
代理人:
摘要：
An electrical breast pump may include a permanently unobstructed continuous passageway across the diaphragm and a rolling diaphragm that is movable between a vent orientation and a vacuum orientation, or a vent piston configured to actuate a closure between a vent orientation and a vacuum orientation so that a pressure chamber is selectively in direct communication with atmospheric pressure.
