A drippage prevention system including: a first automatic control valve (ACV), an input of the first ACV fluidically connected to a source of fluid to be dispensed, the first ACV having a position ranging from fully closed to fully open; a second ACV, an input of the second ACV being fluidically connected to the output of the first ACV, and an output of the second ACV being fluidically connected to a nozzle, the second ACV having positions ranging from fully closed to fully open; a proxy sensor configured to generate a proxy signal representing an indirect measure of a position of the first ACV; and a controller electrically connected to the first and second ACVs and the proxy sensor, the controller being configured to cause the second ACV to close based on the proxy signal and thereby stop flow of the liquid to the nozzle.

A drippage prevention system including: a first automatic control valve (ACV), an input of the first ACV fluidically connected to a source of fluid to be dispensed, the first ACV having a position ranging from fully closed to fully open; a second ACV, an input of the second ACV being fluidically connected to the output of the first ACV, and an output of the second ACV being fluidically connected to a nozzle, the second ACV having positions ranging from fully closed to fully open; a proxy sensor configured to generate a proxy signal representing an indirect measure of a position of the first ACV; and a controller electrically connected to the first and second ACVs and the proxy sensor, the controller being configured to cause the second ACV to close based on the proxy signal and thereby stop flow of the liquid to the nozzle.

Overflow protection and monitoring devices capable of coupling to a drainage pan and may include: a drainage line; a base, the base including an input port; a dry section; and a wet section, the input port capable of coupling to the drainage pan; a base cover, the base cover removably coupled to the base, the base cover including a base cover output port capable of coupling to the drainage line; a fluid displacement mechanism located in the wet section, the fluid displacement mechanism including a fluid displacement mechanism output port; a fluid detection mechanism located in the wet section; and a base attachment, the base attachment coupled to the fluid displacement mechanism output port and the base cover output port, the base attachment including an air relief port and back-flow preventer; a control unit capable of energizing the fluid displacement mechanism upon receiving a signal from the fluid detection mechanism.

A high pressure tank apparatus includes a high pressure tank, a leaked fluid container, and a supply/discharge side discharge flow path. The high pressure tank includes a liner made of resin, a reinforced layer that covers an outer surface of the liner, an insertion member that has formed therein a supply/discharge hole capable of communicating with an inside of the liner and the supply/discharge flow path; and a supply/discharge side cap in which are formed an insertion hole through which the insertion member is inserted and a supply/discharge side draw-out hole that draws out the fluid interposed between the liner and the reinforced layer. The supply/discharge side discharge flow path guides a temporarily released fluid that is the fluid drawn out via the supply/discharge side draw-out hole to a discharge region.

A first electrode coolant path is configured to cool a first welding electrode by liquid coolant flowing from a supply path through the first electrode coolant path to a return path. A second electrode coolant path is configured to cool a second welding electrode by liquid coolant flowing from the supply path through the second electrode coolant path to the return path. Three or more valves are configured to stop or reduce liquid coolant flow through the first or second electrode coolant path and configured to stop or reduce liquid coolant backflow from the return path when the first or second welding electrode is at least partially detached. At least one valve is coupled in the first or second electrode coolant path. A drawback apparatus generates a suction force to draw liquid coolant away from a gap formed when the first or second welding electrode is at least partially detached.

A first electrode coolant path is configured to cool a first welding electrode by liquid coolant flowing from a supply path through the first electrode coolant path to a return path. A second electrode coolant path is configured to cool a second welding electrode by liquid coolant flowing from the supply path through the second electrode coolant path to the return path. Three or more valves are configured to stop or reduce liquid coolant flow through the first or second electrode coolant path and configured to stop or reduce liquid coolant backflow from the return path when the first or second welding electrode is at least partially detached. At least one valve is coupled in the first or second electrode coolant path. A drawback apparatus generates a suction force to draw liquid coolant away from a gap formed when the first or second welding electrode is at least partially detached.

A first electrode coolant path is configured to cool a first welding electrode by liquid coolant flowing from a supply path through the first electrode coolant path to a return path. A second electrode coolant path is configured to cool a second welding electrode by liquid coolant flowing from the supply path through the second electrode coolant path to the return path. Three or more valves are configured to stop or reduce liquid coolant flow through the first or second electrode coolant path and configured to stop or reduce liquid coolant backflow from the return path when the first or second welding electrode is at least partially detached. At least one valve is coupled in the first or second electrode coolant path. A drawback apparatus generates a suction force to draw liquid coolant away from a gap formed when the first or second welding electrode is at least partially detached.

A first electrode coolant path is configured to cool a first welding electrode by liquid coolant flowing from a supply path through the first electrode coolant path to a return path. A second electrode coolant path is configured to cool a second welding electrode by liquid coolant flowing from the supply path through the second electrode coolant path to the return path. Three or more valves are configured to stop or reduce liquid coolant flow through the first or second electrode coolant path and configured to stop or reduce liquid coolant backflow from the return path when the first or second welding electrode is at least partially detached. At least one valve is coupled in the first or second electrode coolant path. A drawback apparatus generates a suction force to draw liquid coolant away from a gap formed when the first or second welding electrode is at least partially detached.

A dispensing nozzle assembly is provided including a nozzle member provided with one or more dispensing apertures to allow fluid to be dispensed therefrom in use. Closure means are provided on or associated with the nozzle member and movable relative thereto between a closed position, wherein the closure means closes the dispensing apertures and fluid cannot be dispensed from the dispensing apertures, and an open position, wherein the closure means are moved at least partially clear of the dispensing apertures and fluid can be dispensed through the dispensing apertures in use. Switch means are moveable between an on position for allowing fluid to flow into the nozzle member for dispensing through the dispensing apertures in use, and an off position for preventing fluid flowing into the nozzle member in use. The switch means are arranged such that movement of the closure means relative to the nozzle member moves or actuates the switch means between the on and off positions in use.

A dispensing nozzle assembly is provided including a nozzle member provided with one or more dispensing apertures to allow fluid to be dispensed therefrom in use. Closure means are provided on or associated with the nozzle member and movable relative thereto between a closed position, wherein the closure means closes the dispensing apertures and fluid cannot be dispensed from the dispensing apertures, and an open position, wherein the closure means are moved at least partially clear of the dispensing apertures and fluid can be dispensed through the dispensing apertures in use. Switch means are moveable between an on position for allowing fluid to flow into the nozzle member for dispensing through the dispensing apertures in use, and an off position for preventing fluid flowing into the nozzle member in use. The switch means are arranged such that movement of the closure means relative to the nozzle member moves or actuates the switch means between the on and off positions in use.