COULTHARD, RICHARD DANIEL JOHN,ROBINSON, TIMOTHY MARK,LOCKE, CHRISTOPHER BRIAN
申请号：
CA2723138
公开号：
CA2723138C
申请日:
2009.05.01
申请国别(地区):
CA
年份:
2016
代理人:
摘要：
A manually-actuated reduced pressure pump comprising: a first barrel having asubstantially cylindrical wall and aclosed end； a piston movably disposed within the first barrel', a chargingchamber being defined between the closed end of thefirst barrel and the piston； a piston spring operably associated with thepiston to bias the piston in a direction that allows an increasein a volume of the charging chamber； a seal disposed within the first barrel,a regulated chamber being defined between theseal and the piston； a regulator passage providing fluid communication betweenthe charging chamber and the regulated chamber；a second barrel operably associated with the piston to move the piston towarda compressed position when the reduced pressurepump is being manually actuated by a user； and a valve body operablyassociated with the regulator passage to selectively allow orprevent fluid communication between the charging chamber and the regulatedchamber.
