Cleaning appliance
AssigneeDyson Technology Limited
InventorsRobert Stefan Wronski, Martin Szymon Gutkowski, Alexander David May
Life of this patent
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Abstract
A fluid delivery system of a dental cleaning appliance includes a pump for drawing a working fluid through a fluid inlet, a hydraulic actuator for receiving working fluid from the pump, a drive for actuating the pump, and a nozzle having a fluid outlet for ejecting working fluid from the appliance. The drive includes a motor and a control circuit for operating the motor. The control circuit is configured to detect stalling of the motor in response to the load applied to the pump by the pressurized working fluid stored in the accumulator, and to deactivate the motor when stalling of the motor has been detected.
Claims34
A dental cleaning appliance comprising:
- a fluid delivery system comprising a fluid inlet, a pump for drawing a working fluid through the fluid inlet, a drive for actuating the pump, and a nozzle having a fluid outlet for ejecting working fluid from the appliance;
- and
- wherein the drive comprises a motor and a control circuit for operating the motor, and wherein the control circuit is configured to detect stalling of the motor from a voltage generated by the motor and to deactivate the motor when stalling of the motor has been detected.
A dental cleaning appliance comprising:
- a fluid reservoir for storing working fluid;
- a fluid delivery system comprising a fluid inlet, a pump for drawing the working fluid from the fluid reservoir through the fluid inlet, a drive for actuating the pump, and a nozzle having a fluid outlet for ejecting working fluid from the appliance;
- and
- wherein the drive comprises a motor and a control circuit for operating the motor, and wherein the control circuit is configured to detect stalling of the motor and to deactivate the motor when stalling of the motor has been detected.
Dependencies are inferred from the claim text.