Geoffrey Mark Shaw,Geoffrey Anders,Lawrence Gordon Alloo
申请号：
US13319690
公开号：
US20120055484A1
申请日:
2010.05.14
申请国别(地区):
US
年份:
2012
代理人:
摘要：
A ventilator which includes: at least one pair of reciprocating opposed gas moving means, the internal volume of which is arranged to be reduced and enlarged by a balanced drive, said gas moving means being arranged to move gas at a predetermined pressure and/or volume to a delivery tube control means for regulating the speed and the distance of movement of the drive wherein the masses of all moving parts are balanced so as to minimise the vibration of the ventilator in use.
