Patent ID: 7128275

Claim:
A liquid warming device comprising: a cavity with a bottom, the cavity adapted to receive a removable basin, the removable basin having a bottom, a set of at least one side wall connected to the bottom of the basin so that the set of at least one side wall forms a walled perimeter around the bottom of the basin to form a container suitable for holding a fluid, the basin having an integrated hollow protrusion positioned on the exterior of the removable basin and extending from the exterior of the removable basin to the space surrounded by the interior of the removable basin; a heater adapted to provide heat to the at least a portion of the exterior of the removable basin; and A control system comprising: a fluid temperature controller; a fluid temperature sensor placed such that placement of the removable basin in at least one orientation places a distal end of the fluid temperature sensor into the interior of the integrated hollow protrusion for the purpose of measuring the temperature of a fluid placed in the removable basin, the temperature obtained by the fluid temperature sensor provided as input to the fluid temperature controller; a heater temperature detector positioned in thermal contact with the heater and providing the heater temperature as input to the fluid temperature controller; and the fluid temperature controller controlling a flow of electric energy provided to the heater so as to regulate the heater temperature based on the temperature obtained by the fluid temperature sensor.