|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/1 ; 251/12907 ; 251/12908 ; 251/282|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 25 인용 특허 : 4|
A liquid flow control solenoid valve for a beverage dispensing system wherein a rolling diaphragm seal is used between a needle valve and the valve body and the increased hydraulic forces on the needle valve caused by the rolling diaphragm are balanced by using a needle valve that is tapered in a direction to create a force on the needle valve in the direction opposite to the force created by the rolling diaphragm, so that the hydraulic forces are balanced and a smaller solenoid can be used to operate the valve.
A method for controlling the flow of liquid through a solenoid valve with the smallest possible solenoid comprising: (a) providing a valve body having a liquid passageway therethrough and including an inlet chamber and an outlet chamber with a flow control orifice therebetween including a valve seat; (b) providing a solenoid operated needle valve movably positioned in said orifice between open and closed positions thereof for moving away from the inlet chamber and into the outlet chamber when said needle valve moves from its closed to its open position; ...