发明授权
- 专利标题: Dual plate backflow and breakaway check valve
- 专利标题(中): 双板回流和分离止回阀
-
申请号: US14634082申请日: 2015-02-27
-
公开(公告)号: US09353878B2公开(公告)日: 2016-05-31
- 发明人: Melvin Plummer , Aaron Plummer , Jerry Friedman , Uri Shohet
- 申请人: Melvin Plummer , Aaron Plummer , Jerry Friedman , Uri Shohet
- 主分类号: F16K17/40
- IPC分类号: F16K17/40 ; E03B9/04 ; F16K17/34 ; F16K17/36 ; A62C35/20 ; A62C35/68 ; E03B9/02
摘要:
A dual plate backflow and breakaway check valve that features a warning system to alert individuals when fire hydrants are dislocated. The dual plate check valve comprises an upper surge protection valve assembly and a lower backflow protection valve assembly. When fire hydrant or pipes conveying fluids are damaged, the locking mechanism enables a plurality of upper witness stream holes to generate at least one plume of fluid to indicate and readily visualize location of damage and allows an upper barrel assembly to operate in a closure mode. In this mode, a high pressure spray of fluid emits from the upper valve barrel and an optimum inclination of the lower portion of the upper valve barrel enables the upper witness stream holes to collide with an inner side wall of the upper valve barrel which causes the plurality of upper witness stream holes to disperse into a warning signaling mist.
公开/授权文献
- US20150240962A1 DUAL PLATE BACKFLOW AND BREAKAWAY CHECK VALVE 公开/授权日:2015-08-27