|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||417/26 ; 417/38|
|우선권정보||JP-0060385 (1975-05-19); JP-0076318 (1975-06-04)|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 15 인용 특허 : 1|
The present invention relates to automatically operative pumping equipment. A by-pass passage is installed branching off from the delivery pipe and meeting the vacuum pipe of a pump driven by an electric motor, the by-pass passage being equipped with pressure regulating means operable in response to the water pipe pressure at the pump delivery side, and by-pass passage regulating means controlled in response to a signal from a flow rate sensor on the pump delivery side, whereby the pressure on the pump delivery side is regulated by the by-pass regulating...