Abstract: A specialized miniature housing installable between a source of gas and gas burners provides an aftermarket safety system for a gas grill. The system prevents accidental accumulation of gas in an enclosed volume within or around an unignited grill, thereby reducing or eliminating the risk of explosion. The housing includes a microcontroller coupled to an internal flow sensor, an external temperature sensor, and a valve. In response to signals received from the sensors, the microcontroller commands the valve to remain open only when positive flow through the housing is coincident with sufficient temperature at the burners. Otherwise, or upon loss of power, the valve closes to cut off gas supply to the grill.

Abstract: An air filtration system (100) for an engine. The air filtration system (100) includes a main filter assembly (102) configured to filter air from a first dirty air inlet (110), the main filter assembly (102) defining a dirty air side (112) of the main filter assembly (102) and a clean air side (114) of the main filter assembly (102). The air filtration system further includes an auxiliary filter assembly (104) configured to filter air from a second dirty air inlet (116), wherein the auxiliary filter assembly (104) is selectively attachable to the main filter assembly (102) such that when the auxiliary filter assembly (104) is attached air is filtered from the second dirty air inlet (116) to the clean air side (114) of the main filter assembly (102).

Abstract: An air filtration system (100) for an engine, the air filtration system (100) comprising: a main filter assembly (102) configured to filter air from a first dirty air inlet (110), the main filter assembly (102) defining a dirty air side (112) of the main filter assembly (102) and a clean air side (114) of the main filter assembly (102); and an auxiliary filter assembly (104) configured to filter air from a second dirty air inlet (116), wherein the auxiliary filter assembly (104) is selectively attachable to the main filter assembly (102) such that when the auxiliary filter assembly (104) is attached air is filtered from the second dirty air inlet (116) to the clean air side (114) of the main filter assembly (102).

Abstract: A fluid vortex display device includes a cylindrical vessel sealed at an upper end. A first fluid inlet is coupled to the cylindrical vessel adjacent a lower end of the vessel and directed at a substantial angle to an outer circumference of the cylindrical vessel. A discharge outlet of a pump is coupled to the fluid inlet. A closure is coupled to the lower end of the vessel. The closure includes a fluid outlet that is substantially spaced apart from a central longitudinal axis of the vessel. The closure may project into the cylindrical vessel to create an annular space adjacent the fluid inlet. The fluid outlet may be in the upper surface of the closure, which may not be perpendicular to the central longitudinal axis of the vessel. A support stand may support the vessel such that it is not perpendicular to a level foundation surface.

Abstract: A fluid display includes a fluid source, a gas source, and a light source. The fluid source coherently emits fluid along a first trajectory. The gas source emits gas along a second trajectory that intersects the first trajectory. The light source is directed toward the intersection of the first trajectory and the second trajectory. The second trajectory may intersect the first trajectory at an oblique angle. The fluid source and/or the gas source may emit intermittently. The fluid source may emit a laminar jet or spherical fluid globules. The gas source may intermittently emit a gas vortex. The gas may be a flammable gas. The fluid may be water and the gas may be air. The fluid display may provide a “water sparkler” effect.

Abstract: A decorative water display provides a laminar water bell. A gas burner may be provided inside the laminar water bell to produce a decorative flame. A laminar nozzle having an outlet arranged to eject a laminar jet of water upwardly in a substantially vertical direction may strike an impactor suspended directly above the outlet of the laminar nozzle such that the laminar jet of water forms the laminar water bell. Alternatively, a vertical pipe may supply water to a thin annular region between two plates such that water flowing between the two plates assumes a generally laminar flow characteristic and forms the laminar water bell when ejected from between the two plates. Alternatively, a hemispherical nozzle may have a slot arranged to eject a sheet of water upwardly to form a segment of the laminar water bell.

Abstract: A fluid vortex display device includes a cylindrical vessel sealed at an upper end. A first fluid inlet is coupled to the cylindrical vessel adjacent a lower end of the vessel and directed at a substantial angle to an outer circumference of the cylindrical vessel. A discharge outlet of a pump is coupled to the fluid inlet. A closure is coupled to the lower end of the vessel. The closure includes a fluid outlet that is substantially spaced apart from a central longitudinal axis of the vessel. The closure may project into the cylindrical vessel to create an annular space adjacent the fluid inlet. The fluid outlet may be in the upper surface of the closure, which may not be perpendicular to the central longitudinal axis of the vessel. A support stand may support the vessel such that it is not perpendicular to a level foundation surface.

Abstract: A fluid display includes a fluid source, a gas source, and a light source. The fluid source coherently emits fluid along a first trajectory. The gas source emits gas along a second trajectory that intersects the first trajectory. The light source is directed toward the intersection of the first trajectory and the second trajectory. The second trajectory may intersect the first trajectory at an oblique angle. The fluid source and/or the gas source may emit intermittently. The fluid source may emit a laminar jet or spherical fluid globules. The gas source may intermittently emit a gas vortex. The gas may be a flammable gas. The fluid may be water and the gas may be air. The fluid display may provide a “water sparkler” effect.