|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||F16K-015/04 E03B-009/16 E03C-001/10|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 0 인용 특허 : 5|
An insertable backflow preventer is presented. The backflow preventer is provided with a cylindrical housing. The housing has a flow transition zone, a proximal orifice/ball seat, a ball with a specific weight that equals or is close to the specific weight of the surrounding fluid, and a distal retaining screen. The housing can have a flange provided on the outside of the housing at one end to facilitate securing the valve in a pipe. The valve is self-cleaning, can be placed in any orientation in a pipe and has low hydraulic head-loss. The valve's unique...
1. A valve, comprising: a valve body;a retaining screen at a distal end;a ball seat at a proximal end portion; anda ball; wherein the valve body has an outer diameter, said outer diameter being constant between the distal end and the proximal end, wherein the ball is caged between the retaining screen and the ball seat, wherein the ball has a specific weight that is a defined function of the specific weight of a fluid to be sent through the valve,and wherein in forward flow the ball is positioned inside the retaining screen, allowing fluid to pass, but u...