Liquid flow control valve

Details Liquid flow control valve Liquid flow control valve

2005-01-04

2005-01-04

Lee, Kevin (Department: 3753)

Fluid handling

Systems

Programmer or timer

C137S080000, C137S460000, C137S553000, C251S129040

Reexamination Certificate

active

06837271

ABSTRACT:
A liquid flow control valve has a valve body10in which is mounted a valve member41moveable between valve open and closed positions. A turbine15senses liquid flow through the valve body10and generates electrical pulses which are counted by a control circuit, over a pre-set period. An electro-magnet54,55controls operation of the valve member41and is driven by the control circuit so as to close the valve in the event that flow continues for longer than the pre-set period or the flow is greater than at a pre-set rate. The valve may also be closed should the temperature fall to about 0° C.

REFERENCES:
patent: 4838310 (1989-06-01), Scott et al.
patent: 5086806 (1992-02-01), Engler et al.
patent: 5139044 (1992-08-01), Otten et al.
patent: 5240028 (1993-08-01), Hoch, Jr. et al.
patent: 5287876 (1994-02-01), Takahashi
patent: 5782263 (1998-07-01), Isaacson, Jr. et al.
patent: 5971011 (1999-10-01), Price

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