# US 2012/0073447 A1 · Espresso coffee machine

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- Number: US 2012/0073447 A1
- Document ID: US20120073447A1
- Status: Published application
- Kind: A1
- Application number: 13/102,800
- Filed: 2011-05-06
- Published: 2012-03-29
- Earliest claimed: 2010-09-29
- Inventors: Pablo Gonzalez Cid
- Web page: https://patentgrep.com/patent/US20120073447A1

## CPC

- A47J 31/545: {Control or safety devices}
- A47J: KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES

## Abstract

It is disclosed an espresso coffee machine, which comprises a temperature regulation system that includes a water storage vessel, in direct flow connection with a water heater of thermoblock type. The water heater of thermoblock type is at a first warming temperature and contains inside a coil through which the water flows at room temperature coming from the water storage vessel. When the water flows at room temperature through the coil the temperature is raised up to an initial warming temperature, producing steam in this way, to reduce later its temperature from the initial warming temperature up to the final extraction temperature. Said temperature regulation system includes besides a temperature sensor which measures the temperature inside the water heater of thermoblock type; an outlet or relief valve disposed between the water heater or thermoblock type and the water/steam vessel which releases the very hot water and/or the water steam obtained from the thermoblock when the water is at an initial warming temperature; an electronic controller or electronic card disposed behind the thermoblock and whose function is to allow that the temperature sensor measures the temperature inside the water heater and allow that the outlet or relief valve changes from a closed position to an opened position and vice versa, and a water/steam collector vessel which receives the water and/or steam coming from the water heater when the outlet or relief valve is in an opened position.

## Claims

### Claim 1

An espresso coffee machine, which comprises a temperature regulation system, which includes:
a) a water storage vessel;
b) a water heater in flow connection with the storage vessel, the heater is at a first warming temperature and that has inside a duct for which at the moment of the extraction of coffee, the water flows from the storage vessel, raising the water temperature up to an initial heating temperature, producing steam and/or water reducing later its temperature up to a final extraction temperature;
c) a temperature sensor to measure the temperature inside the water heater;
d) an outlet or relief valve in a flow connection with the water heater to release the water and/or water steam inside the water heater when the water is at the warming temperature; and
e) a controller operatively connected to the temperature sensor and the outlet or relief valve, so that it changes from a closed position to an opened position and vice versa;
f) a water/steam collector vessel which receives the water and/or the steam coming from the water heater.

### Claim 2 (depends on 1)

The espresso coffee machine according to claim 1, wherein the water inside the storage vessel is at room temperature.

### Claim 3 (depends on 1)

The espresso coffee machine according to claim 1, wherein the water heater is of thermoblock type.

### Claim 4 (depends on 1)

The espresso coffee machine according to claim 1, wherein the first heating temperature is within the range from 95° C. to 114° C.

### Claim 5 (depends on 1)

The espresso coffee machine according to claim 1, wherein the initial warming temperature is higher than 100° C.

### Claim 6 (depends on 1)

The espresso coffee machine according to claim 1, wherein the final extraction temperature is within the range from 97° C. to 99.99° C.

### Claim 7 (depends on 1)

The espresso coffee machine according to claim 1, wherein the outlet or relief valve changes from the closed position to an opened position when the temperature sensor measures an initial heating temperature.

### Claim 8 (depends on 7)

The espresso coffee machine according to claim 7, wherein the outlet or relief valve is in an opened position that allows that the water and/or the steam that is within the coil goes out through said valve and towards the water/steam collector vessel.

### Claim 9 (depends on 1, 6)

The espresso coffee machine according to claim 1 and 6, wherein the outlet and relief valve changes from the opened position to a closed position when the temperature sensor measures a final extraction temperature.

### Claim 10 (depends on 1, 9)

The espresso coffee machine according to claim 1 and 9, wherein the outlet and relief valve is in a closed position and the water flows from the water heater towards the coffee grains for the obtention of the espresso coffee.