公开(公告)号：US20140034161A1

公开(公告)日：2014-02-06

申请号：US13747229

申请日：2013-01-22

Applicant: Flow Control LLC

Inventor： John J. FONG

IPC: B67D1/00

CPC classification number: B67D1/0027 ,  B67D1/1243 ,  Y10T137/2496 ,  Y10T137/85978

Abstract: The present invention provides a device for turning off a pump. In operation, when the device is activated there is vacuum pressure in a syrup chamber. A diaphragm acting in response to the vacuum causes a piston assembly in the syrup chamber to move in the one direction (e.g. right), thus compressing a W-shaped spring in the air chamber. As the piston assembly moves, a spring holder of the W-shaped spring also moves to the one direction. As the W-shaped spring is compressed over and passed the most compressed position, the W-shaped spring moves a valve assembly in the air chamber to an opposite direction (e.g. left) and blocks a hole in a spool that otherwise allows air to pass through the air chamber to activate the pump. When the air is stopped, this turns off the pump.

Abstract translation: 本发明提供一种关闭泵的装置。 在操作中，当装置被激活时，糖浆室中存在真空压力。 响应于真空而起作用的隔膜使得糖浆室中的活塞组件沿一个方向（例如右）移动，从而压缩空气室中的W形弹簧。 当活塞组件移动时，W形弹簧的弹簧保持器也向一个方向移动。 当W形弹簧被压缩并通过最压缩位置时，W形弹簧将气室中的阀组件移动到相反的方向（例如左），并且阻塞阀芯中的孔，否则允许空气通过 通过气室激活泵。 当空气停止时，这将关闭泵。

公开(公告)号：US20180128389A1

公开(公告)日：2018-05-10

申请号：US15638675

申请日：2017-06-30

Applicant: FLOW CONTROL LLC

Inventor： John J. FONG

IPC: F16K15/06 ,  F04B53/10

CPC classification number: F16K15/063 ,  F04B53/1032 ,  F05C2225/00 ,  Y10T137/7837

Abstract: A check valve is provided having a seat and a poppet. The seat is made of a plastic material, has an aperture for enabling fluid to flow through the seat, and also has one end portion that has a circumferential edge with a thin sealing lip. The poppet is slidably arranged in the aperture of the seat and has an elastic member. The poppet is configured for opening to enable fluid to flow in one direction when fluid pressure is detected. The elastic member is configured for ensuring sealing between an outer surface of the poppet and the thin sealing lip of the seat when there is no fluid flow in the one direction so as to substantially prevent fluid flow in the opposite direction. According to some embodiments of the present invention, the thin plastic sealing lip may have a thickness of about 0.01″ Embodiments are also envisioned where the thickness may be in a range of 0.003″-0.03″.