|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||G01F-005/00 A47J-031/46 A47J-031/52|
|미국특허분류(USC)||073/202; 099/302R; 099/280; 099/283|
|§371/§102 date||20121108 (20121108)|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 2 인용 특허 : 7|
A method and apparatus for measuring a resultant flow delivered by a pump coupled to an over pressure valve, the method comprising the steps of: measuring, using a first flow meter, feed flow to the pump; measuring, using a second flow meter, return flow from the over pressure valve; and calculating resultant flow, at least in part, by subtracting measured return flow from measured feed flow. A pump power modification module can further modifying the pump output pressure to enable pressure profiling.
1. A coffee making apparatus including: a vibration or displacement pump for delivering fluid flow;a power modification module controlling the electrical power applied to the pump for modifying output pressure of the pump output, the power modification module modifies alternating current power supplied to the pump during a phase of an alternating current power cycle; wherein phase control enables only portions of the alternating current cycle to be supplied to the pump for modifying output pressure of the pump output;a user interface coupled to the power...