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US 2009/0013875 A1Published application
Automated dose control for espresso maker
AssigneeBreville Pty Limited
InventorLochana Subasekara Widanagamage Don
Life of this patent
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Abstract
A coffee machine has a flow sensor located upstream of the boiler or thermal block for the purpose of sensing changes in flow rate in a system for automating dose control.
Claims16
An espresso making device, comprising:
- a source of water;
- a portafilter;
- a water pump;
- a flow sensor for measuring a flow from the pump;
- the pump delivering the flow to a heating device;
- a microprocessor controlling the pump, the microprocessor receiving an output of the flow sensor and determining from the output, a flow rate;
- the microprocessor adapted to determine a volume delivered by the pump through the portafilter based on changes in the flow rate over time and shut off the pump when a target volume has been discharged from the portafilter.
4 more elements
A method for determining the volume of coffee delivered by an espresso machine having a source of water, a portafilter, a water pump, a flow sensor located between the source of water and the pump, the pump delivering a flow of water to a heating device, a microprocessor controlling the pump, comprising the steps of:
- using the microprocessor to receive an output of the flow sensor and determine from the output and time, a flow rate;
- using the microprocessor to determine a volume delivered by the pump through the portafilter based on changes in the flow rate and time and shut off
- the pump when a target volume has been discharged from the portafilter.
Dependencies are inferred from the claim text.