Arrangement for measuring the level of liquified gases
Arrangement for the regulation of the height of a liquid level
Aspiration chemical supply apparatus and method
Attitude insensitive valve
Autofeed mechanism for heated humidifier chamber
Automated farm turnout
Automatic antifreeze back-up valve for sewer
Automatic counterbalanced sewer valve with float closure
Automatic drain for freight container
Automatic drain valve for a compressed air system
Automatic fill-stop valve
Automatic fill-stop valve
Automatic fluid-supply apparatus for a boiler system
Automatic gate valve shut-off device
Automatic irrigation regulator controlled by water evaporation
Automatic liquid replenishing system
Automatic liquid-supply stopper plug
Automatic pool filler
Automatic regulating valve apparatus
Automatic remote fluid level controller