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US 5,294,057 AGranted
Solenoid operated liquid spray gun
AssigneeSpraying Systems Co.
InventorRichard J. Hamilton
Life of this patent
Estimating the term…
Abstract
A solenoid operated liquid spray gun for use in directing small volume, air atomized liquid at short operating intervals. The spray gun includes a housing having pressurized liquid and air inlets, a solenoid coil contained within the housing, and a fluid control module disposed within the solenoid coil for controlling the flow of liquid from the liquid inlet through a discharge nozzle. The solenoid coil and module further define an annular air passage within the housing for communicating pressurized air from the air inlet to the nozzle for facilitating atomization and direction of the liquid discharging from the gun.
Claims39
A liquid spray gun comprising
- a housing,
- means defining a liquid inlet for connection to a pressurized liquid supply source,
- a discharge nozzle,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- a fluid control module disposed within said solenoid coil for controlling the flow of liquid from said liquid inlet defining means through said nozzle, said control module defining a liquid passage for communicating liquid from said liquid inlet defining means to said nozzle and including a valve plunger movable between a first position for preventing the flow of liquid through said nozzle and a second position for permitting the flow of liquid from said liquid inlet defining means and through said nozzle for direction from said gun,
- said solenoid coil being selectively operable for moving said plunger between said first and second positions,
- said control module being removable and replaceable in said housing,
- a retaining member releasably engageable with said housing for securing said control module in said housing, and
- said control module being removable from said housing upon disengagement of said retaining member from said housing.
7 more elements
A liquid spray gun comprising
- a housing,
- means in said housing defining a liquid inlet for connection to a pressurized liquid source,
- means in said housing defining an air inlet for connection to a pressurized air source,
- a discharge nozzle at an end of said housing,
- means defining a liquid flow passage for communicating liquid from said liquid inlet to said nozzle,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- a liquid control module defining a liquid passage for communicating liquid from said liquid inlet defining means to said nozzle and including a valve plunger that is movable between a first position for preventing the flow of liquid through said nozzle and a second position for permitting the flow of liquid from said inlet defining means and through said liquid flow passage and nozzle for direction from said spray gun,
- said solenoid coil being selectively operable for moving said control valve plunger between said first and second positions,
- means defining an air flow passage within said housing for communicating pressurized air from said air inlet defining means to said nozzle for facilitating atomization and direction of liquid directed from said gun,
- said control module being removable and replaceable in said housing,
- a retaining member releasably engageable with said housing for securing said control module in said housing, and
- said control module being removable from said housing upon disengagement of said retaining member from said housing.
10 more elements
In a can manufacturing operation in which cylindrical can bodies having a longitudinal welded seam are successively passed over a spray gun which directs a strip of atomized protective liquid over the welded seam area, said spray gun comprising
- a housing,
- means defining a liquid inlet for connection to a pressurized liquid supply source,
- a discharge nozzle,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- a solenoid operated control module defining a liquid passage for communicating liquid from said liquid inlet defining means to said nozzle and for controlling the flow of liquid from said inlet through said nozzle, said solenoid coil being selectively energizable for operating said control module,
- said control module being removable and replaceable in said housing,
- a retaining member releasably enageable with said housing for securing said control module in said housing, and
- said control module being removable from said housing upon disengagement of said retaining member from said housing.
6 more elements
A liquid spray gun comprising
- a housing,
- means defining a liquid inlet for connection to a pressurized liquid supply source,
- a discharge nozzle at an end of said housing,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- a fluid control module removably and replaceably mounted in said housing for controlling the flow of liquid from said inlet defining means through said nozzle, said control module including a valve plunger movable between a first position for preventing the flow of liquid through said nozzle and a second position for permitting the flow of liquid from said inlet defining means and through said nozzle for direction from said gun,
- said solenoid coil being selectively operable for moving said plunger from between said first and second positions,
- means for defining an air inlet for connection to a pressurized air source, and
- said housing and module defining an annular flow passageway for communicating pressurized air from said air inlet defining means to said nozzle.
6 more elements
A liquid spray gun comprising
- a housing,
- means defining a liquid inlet for connection to a pressurized liquid supply source,
- a discharge nozzle at an end of said housing,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- said housing having a two-part construction including a body and a removable elongated cover, said body being formed with a counterbore opening in a downstream direction,
- a control module mounted within said solenoid coil with an upstream end thereof disposed in said counterbore,
- said control module including a valve plunger movable between a first position for preventing the flow of liquid through said nozzle and a second position for permitting the flow of liquid from said inlet defining means and through said nozzle for direction from said gun, and
- said solenoid coil being selectively operable for moving said plunger from between said first and second positions.
6 more elements
A liquid spray gun comprising
- a housing,
- means defining a liquid inlet for connection to a pressurized liquid supply source,
- a discharge nozzle at an end of said housing,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- a fluid control module disposed within said solenoid coil for controlling the flow of liquid from said inlet defining means through said nozzle, said control module including a valve plunger movable between a first position for preventing the flow of liquid through said nozzle and a second position for permitting the flow of liquid from said inlet defining means and through said nozzle for direction from said gun,
- said solenoid coil being selectively operable for moving said plunger from between said first and second positions,
- said control module further including a cylindrical core adjacent an upstream end of said valve plunger and a cylindrical tube extending forwardly of said core, said plunger being mounted for relative longitudinal movement within said tube,
- said control module further including a valve seat having a liquid discharge orifice, said valve seat being supported within a seat plug removably engageable with a downstream end of said tube,
- said core and valve plunger being formed with internal liquid flow passageways for permitting communication of liquid from said liquid inlet defining means to said valve seat, and
- said valve plunger being in seated engagement with said valve seat when in said first position to prevent liquid flow through said discharge orifice and in retracted relation to said valve seat when in said second position to permit the flow of liquid through said discharge orifice.
8 more elements
A liquid spray gun comprising
- a housing,
- means defining a liquid inlet for connection to a pressurized liquid supply source,
- a discharge nozzle at an end of said housing,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- a fluid control module disposed within said solenoid coil for controlling the flow of liquid from said inlet defining means through said nozzle, said control module including a valve plunger movable between a first position for preventing the flow of liquid through said nozzle and a second position for permitting the flow of liquid from said inlet defining means and through said nozzle for direction from said gun,
- said solenoid coil being selectively operable for moving said plunger from between said first and second positions,
- said housing including means defining an air inlet for connection to a pressurized air source,
- said nozzle including a fluid tip through which liquid is directed,
- an air cap mounted downstream of said fluid tip and being formed with a discharge orifice,
- said solenoid coil being wound on a spool having an internal cylindrical opening, and
- said module and spool opening defining an air passageway for communicating pressurized air from said air inlet defining means to said air cap for assisting in atomization and direction of liquid discharging from said fluid tip.
9 more elements
A liquid spray gun comprising
- a housing,
- means in said housing defining a liquid inlet for connection to a pressurized liquid source,
- means in said housing defining an air inlet for connection to a pressurized air source,
- a discharge nozzle at an end of said housing,
- means defining a liquid flow passage for communicating liquid from said liquid inlet defining means to said nozzle,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- a liquid control module including a valve plunger that is movable between a first position of preventing the flow of liquid through said nozzle and a second position for permitting the flow of liquid from said liquid inlet defining means through said liquid flow passage defining means and nozzle for direction from said spray gun,
- said solenoid coil being selectively operable for moving said control valve plunger between said first and second positions, and
- said module and housing defining an annular air flow passage within said housing for communicating pressurized air from said air inlet defining means to said nozzle for facilitating atomization and direction of liquid directed from said gun.
7 more elements
A liquid spray gun comprising
- a housing,
- means in said housing defining a liquid inlet for connection to a pressurized liquid source,
- means in said housing defining an air inlet for connection to a pressurized air source,
- a discharge nozzle at an end of said housing,
- means defining a liquid flow passage for communicating liquid from said liquid inlet defining means to said nozzle,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- a control module removable and replaceable in said housing, said control module including a valve plunger and a cylindrical core adjacent an upstream end of said valve plunger, said core and valve plunger being formed with internal liquid flow passageways for permitting communication of liquid from said liquid inlet defining means to said nozzle,
- said valve plunger being movable between a first position for preventing the flow of liquid through said nozzle and a second position for permitting the flow of liquid from said liquid inlet defining means through said liquid flow passage and nozzle for direction from said spray gun,
- said solenoid coil being selectively operable for moving said valve plunger between said first and second positions, and
- means defining an air flow passage within said housing for communicating pressurized air from said air inlet defining means to said nozzle for facilitating atomization and direction of liquid directed from said gun.
8 more elements
A liquid spray gun comprising
- a housing,
- means in said housing defining a liquid inlet for connection to a pressurized liquid source,
- means in said housing defining an air inlet for connection to a pressurized air source,
- a discharge nozzle at an end of said housing,
- means defining a liquid flow passage for communicating liquid from said liquid inlet defining means to said nozzle,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- a liquid control module including a valve plunger that is movable between a first position for preventing the flow of liquid through said nozzle and a second position for permitting the flow of liquid from said liquid inlet defining means through said liquid flow passage and nozzle for direction from said spray gun,
- said solenoid coil being selectively operable for moving said valve plunger between said first and second positions, and
- said solenoid coil being wound on a spool having an internal cylindrical opening, said module and spool opening defining an air passageway for communicating pressurized sir from said air inlet defining means to said nozzle for facilitating atomization and direction of liquid directed from said gun.
7 more elements
In a can manufacturing operation in which cylindrical can bodies having a longitudinal welded seam are successively passed over a spray gun which directs a strip of atomized protective liquid over the welded seam area, said spray gun comprising
- a housing,
- means defining a liquid inlet for connection to a pressurized liquid supply source,
- means for defining an air inlet for connection to a pressurized air source,
- a discharge nozzle,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- a solenoid operated control module for controlling the flow of liquid from said inlet through said nozzle, said solenoid coil being selectively energizable for operating said control module,
- said control module being removable and replaceable from said housing,
- said housing and module defining an annular flow passageway for communicating pressurized air from said air inlet defining means to said nozzle for assisting in atomization and direction of liquid spray from said discharge nozzle.
6 more elements
A liquid spray gun comprising
- a housing,
- means defining a liquid inlet for connection to a pressurized liquid supply source,
- a solenoid coil supported within said housing,
- means for electrically coupling said solenoid coil to an electrical source,
- a fluid control module removably disposed within said housing for controlling the flow of liquid from said liquid inlet defining means through said nozzle, said control module including a core positionable within said solenoid coil, a tubular portion extending forwardly of said core, a valve seat carried by said tubular portion and having a liquid discharge orifice, and a valve plunger disposed within said tubular portion and moveable between a first position in seated engagement with said valve seat for preventing liquid flow through said discharge orifice and a second position in retracted relation to said valve seat for permitting the flow of liquid from said liquid defining means through said discharge orifice and for direction from said gun,
- said solenoid coil being selectively operable for moving said plunger between said first and second positions, and
- means for releasably retaining such module in properly disposed position in said housing and for permitting removal and replacement of said module.
4 more elements
Dependencies are inferred from the claim text.