Handheld system and method for heating and dispensing shaving fluid

A handheld system for heating and dispensing shaving fluid, the handheld system comprising:

• a housing comprising:
• a lower portion;
• an upper portion that comprises a cylindrical surface, that is disposed above the lower portion, and that is vertically oriented;
• a gap between the upper portion and the lower portion;
• and
• a receptacle disposed at a bottom side of the lower portion of the housing, the receptacle comprising a releasable catch configured to engage a protruding rim of a pressurized vessel containing shaving fluid, wherein the pressurized vessel containing shaving fluid comprises a manually actuated dispensing valve and a nozzle that emits shaving fluid when the manually actuated dispensing valve is manually actuated by depressing the upper portion to reduce the gap;
• an inlet that is centrally disposed in the receptacle, dimensioned to mate with the nozzle, and operative to receive shaving fluid emitted by the nozzle;
• an outlet disposed on the cylindrical surface of the upper portion of the housing and operative to emit heated shaving fluid;
• a channel extending from the inlet to the outlet;
• a watertight charging port disposed on the cylindrical surface of the upper portion of the housing;
• a circuit board mounted in the upper portion;
• a battery mounted to an upper side of the circuit board;
• an electrical path extending between the battery and the watertight charging port;
• a heating coil mounted to the circuit board,
• wherein the heating coil is disposed in a portion of the channel that is below the circuit board and that extends along a lower side of the circuit board,
• wherein the heating coil comprises four heating coil segments that extend lengthwise alongside one another in the channel, and
• wherein the four heating coil segments are connected in electrical series to one another;
• a temperature sensor mounted to the lower side of the circuit board and disposed in the channel downstream from the heating coil adjacent the outlet;
• a dispensing sensor that is operative to sense manual actuation of the manually actuated dispensing valve, the dispensing sensor comprising three switches mounted to the lower side of the circuit board adjacent a periphery of the circuit board, wherein the three switches are spaced about the periphery in a triangular geometry;
• an accelerometer disposed adjacent the circuit board;
• a controller mounted to the lower side of the circuit board and comprising an output configured to output control signals;
• and
• a solid state switch mounted to the lower side of the circuit board, wherein the solid state switch is operably coupled to the output of the controller to receive the control signals, to the battery, and to the heating coil, wherein the solid state switch comprises a metal-oxide-semiconductor field-effect transistor, wherein the solid state switch is configured to control the heating coil according to the control signals by modulating width of pulses of electricity flowing from the battery to the heating coil,
• wherein the handheld system is watertight with respect to electrical circuitry that the handheld system comprises,
• wherein the controller further comprises non-transitory memory and instructions stored thereon, that when executed by the controller, perform a method, and
• wherein the method comprises controlling the heating coil by varying the control signals according to a temperature signal provided by the temperature sensor, a dispensing signal provided by the dispensing sensor, and an accelerometer signal provided by the accelerometer.