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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||417/349 ; 417/429 ; 417/518 ; 417/539|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 6 인용 특허 : 0|
A compact and highly reliable proportioning pumping system for supplying a precise and controllable mixture of concentrate and water in a kidney dialysis machine comprises a central body and a pair of oppositely mounted pivotable linkages coupled to the body. A first pivotable linkage is coupled by connecting rods to a water metering piston and a concentrate metering piston respectively, a variable stroke ratio being provided by a signal actuated drive coupled to the linkage mechanism and controlling the relative position of the end of one of the connect...
A positive displacement system for delivery of two liquids at controlled rates using at least one pressurized liquid comprising: first and second reciprocating piston means including first pivotally mounted linkage means coupled to reciprocate said piston means in synchronism, each for pumping a different liquid; metering valve means including conduit means for controlling liquid flow directions through said piston means in response to the position of said metering valve means; and control means including reciprocable actuator piston means, and switching...