Portable water heater
AssigneeWaipuna International Limited
InventorsDavid Garth Reid, John Deane Weatherly
Life of this patent
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Abstract
A hand held dispenser of hot water intended for weed control purposes has a handle containing a hose connection, a flow regulator, a heating tube, an exit tube, a nozzle and a power switch. The handle is connected to a tube which contains a main electric water heating element surrounded by a tube through which water can flow form the bottom of the wand towards the handle before being piped through an exit tube to the nozzle. A temperature sensor is positioned adjacent the handle to regulate the power supplied to the heating element.
Claims16
A portable water heater capable of generating a flow of water at around its boiling point, suitable for use in killing plants, having a water inlet for connection to a source of water, water heating means, and an outlet nozzle, wherein there is means for restricting the flow of water through the water heating means;
- the water heating means comprises an electrical heating means and means for sensing at least the outlet water temperature of the water leaving the electrical heating means and means to control the amount of power applied to the water heating means to regulate the temperature of the heated water leaving the outlet, and wherein the flow of water through the wand is arranged so that when in use, water flows from the handle towards the outlet end and then flows upwards through the electrical heating means and exits the electrical heating means near the handle, and the resulting hot water is then piped to the outlet nozzle.
A portable water heater capable of generating a flow of water at around its boiling point, suitable for use in killing plants, having a water inlet for connection to a source of water, water heating means, and an outlet nozzle, means for restricting the flow of water through the water heating means;
- the water heating means comprises an electrical heating means and means for sensing at least the outlet water temperature of the water leaving the electrical heating means and means to control the amount of power applied to the water heating means to regulate the temperature of the heated water leaving the outlet, wherein the electrical heating means comprises a single resistance heating element of about 2 kW rating surrounded by a co-axial tube through which the water can flow, and wherein the flow of water through the wand is arranged so that when in use, water flows from the handle towards the outlet end and then flows upwards through the electrical heating means and exits the electrical heating means near the handle, and the resulting hot water is then piped to the outlet nozzle.
Dependencies are inferred from the claim text.