Coffee-making machine
First Claim
1. A coffee-making machine of the type to receive water from an external source and deliver hot water to ground coffee comprising:
- a reservoir to receive and hold water from said external source;
a boiler connected to said reservoir so that fluid flows from said reservoir to said boiler;
a discharge head connected to said boiler so that fluid flows from said boiler to said discharge head;
a controller in communication with said boiler and being responsive to a brew command, wherein said reservoir includes a lower level sensor and an upper level sensor, said upper level sensor for detecting a reservoir full condition, said controller connecting said boiler to a power supply to energize said boiler and heat water received from said reservoir upon receipt of said brew command and when the water in said reservoir is at said full condition as detected by said upper level sensor, said controller disconnecting said boiler from the power supply when a sufficient amount of water has entered said boiler from said reservoir and the water in said reservoir drops below said lower level sensor; and
valved inlet means responsive to said controller and acting between said external source and said reservoir, said controller opening said valved inlet means when the water in said reservoir drops below said lower level sensor and closing said valved inlet means when the water level in said reservoir is detected by said upper level sensor.
2 Assignments
0 Petitions
Accused Products
Abstract
A coffee-making machine includes a reservoir connected to an external water supply via a valve which is divided into hot and cold water tanks. The cold water tank feeds a boiler which operates to heat the water in the cold water tank only when a brew cycle has been initiated. Heated water from the boiler is fed to an expansion chamber before being discharged onto the ground coffee via a spray head at the end of the expansion chamber. Upper and lower water level sensors are in the cold water tank and detect water level conditions therein. A controller communicates with the upper and lower level sensors and the boiler and allows a brew cycle to be initiated only when the water level in the cold water tank is detected by the upper level sensor. When the water level in the cold water tank falls below the lower level sensor, the controller disables the boiler and opens the valve to replenish the water level in the cold water tank. A heating element is in the hot water tank and is energized by the controller to maintain the water therein at a preselected temperature. If the heating element is on and the brew cycle is initiated, the controller disables the heating element until the brew cycle is completed.
61 Citations
18 Claims
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1. A coffee-making machine of the type to receive water from an external source and deliver hot water to ground coffee comprising:
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a reservoir to receive and hold water from said external source; a boiler connected to said reservoir so that fluid flows from said reservoir to said boiler; a discharge head connected to said boiler so that fluid flows from said boiler to said discharge head; a controller in communication with said boiler and being responsive to a brew command, wherein said reservoir includes a lower level sensor and an upper level sensor, said upper level sensor for detecting a reservoir full condition, said controller connecting said boiler to a power supply to energize said boiler and heat water received from said reservoir upon receipt of said brew command and when the water in said reservoir is at said full condition as detected by said upper level sensor, said controller disconnecting said boiler from the power supply when a sufficient amount of water has entered said boiler from said reservoir and the water in said reservoir drops below said lower level sensor; and valved inlet means responsive to said controller and acting between said external source and said reservoir, said controller opening said valved inlet means when the water in said reservoir drops below said lower level sensor and closing said valved inlet means when the water level in said reservoir is detected by said upper level sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A coffee-making machine of the type to receive water from an external source and deliver hot water to ground coffee comprising:
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a reservoir to receive and hold water and being divided into a hot water tank and a cold water tank by a baffle, said cold water tank communicating with valved inlet means connected to said external source; heating means associated with said cold water tank to heat water held therein prior to delivery of heated water to said ground coffee; a discharge head to deliver heated water to said ground coffee; means to deliver heated water to said discharge head; and a controller in communication with said heating means and said delivery means, said controller initiating said delivery means to deliver heated water to said discharge head in response to a brew command, wherein said hot water tank receives water from said cold water tank and includes a heating element responsive to said controller to heat water therein to a preselected temperature and faucet means to allow heated water to be withdrawn from said hot water tank. - View Dependent Claims (15, 16, 17, 18)
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Specification