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US 6,526,872 B2Granted
Coffee making machine
AssigneeRaymond Electric (China) Ltd.
InventorYing Man Wong
Life of this patent
Estimating the term…
Abstract
A coffee making machine includes a vessel that supports a fitter basket containing measure of coffee grounds for mixing with hot water in a generally conventional way. A re-circulating passage connects a bottom outlet of the vessel to a top of the basket. A pump and heat exchanger are provided in the re-circulation passage. The pump and heat-exchanger are controlled by a programmable controller unit so that brewing or coffee-making conditions are readily and adjustably controllable by a user.
Claims4
A coffee making machine into which a quantity of hot water is arranged to be supplied comprising:
- a reservoir for holding and heating a supply of hot water;
- a water feed line for discharging a portion of said hot water supply to a brewing vessel;
- an open topped filter basket for retaining a measure of coffee grounds supported in said vessel, said coffee grounds retained below a liquid level of said portion of said hot water retained within said brewing vessel;
- a re-circulating flow passage connected between a bottom of said vessel and a top of said basket;
- a heater for heating liquid coffee in said re-circulating flow passage;
- an electric pump for pumping said liquid coffee through said flow passage to said top of said basket;
- and
- control means arranged to control operation of said heater and to set and control a predetermined time period during which said coffee grounds are submerged below said liquid level of said portion of said hot water retained within said brewing vessel.
5 more elements
Dependencies are inferred from the claim text.