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US5899222A Ball valve control system 失效
球阀控制系统

Ball valve control system
摘要:
The present invention relates to an improved ball valve assembly which is adapted to be fitted into a water delivery device such as a spigot or fire hydrant. More specifically, the ball valve assembly is specifically installed and adapted for remote control. Such remote control enables the ball valve to be positioned at a location within the water delivery device to avoid damage. Thus, the remote control enables the ball valve to be resistant to cold weather or physical damage to the delivery device. The various components of the present invention, and the manner in which they interrelate, will be described in greater detail hereinafter.
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