# US 9,775,459 B2 · Cooking device

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- Number: US 9,775,459 B2
- Document ID: US9775459B2
- Status: Granted
- Kind: B2
- Application number: 14/232,098
- Filed: 2011-07-25
- Published: 2014-10-02
- Granted: 2017-10-03
- Earliest claimed: 2011-07-25
- Assignees: Convotherm Elektrogeraete GmbH
- Applicants: Guenter Wurdinger; Hannes Laessig; Lutz Riefenstein
- Inventors: Guenter Wurdinger; Hannes Laessig; Lutz Riefenstein
- Web page: https://patentgrep.com/patent/US9775459B2

## CPC

- A47J 27/04: for cooking food in steam; Devices for extracting fruit juice by means of steam {; Vacuum cooking vessels (steam-heated vessels for hotels, restaurants or canteens A47J27/16)}
- F24C 14/005: {using a cleaning liquid}
- F24C 15/2007: {from oven cavities}
- A47J 2027/043: {for cooking food in steam}
- A47J: KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION

## Abstract

A cooking device comprising a first interior chamber, a second interior chamber being fluidly connected with the first interior chamber via a drain and comprising a first water reservoir, the drain and the first water reservoir forming a first air trap, and a device outlet downstream of the second interior chamber, whereby said air trap is adapted to be opened or closed by lowering or lifting the first water reservoir between the first interior chamber and the second interior chamber.

## Claims

### Claim 1

A cooking device comprising:
a first interior chamber that comprises a cooking chamber;
a second interior chamber containing a first water reservoir having a first water level, wherein the second interior chamber is fluidly connected with the first interior chamber via a drain having an end disposed in communication with the first interior chamber and an end disposed below the first water level to form a first air trap to the environment;
a second water reservoir adjacent to the first water reservoir in the second interior chamber, wherein the second water reservoir has a second water level, and wherein the second water reservoir is separated from the first water reservoir by a wall therebetween; and
a third reservoir having at least a second air trap,
wherein the first air trap is adapted to be opened by lowering the first water level below the end of the drain disposed in communication with the second interior chamber and closed by raising the first water level above the end of the drain disposed in communication second interior chamber, and wherein the second air trap is always closed.

### Claim 2 (depends on 1)

The cooking device according to claim 1, further comprising a drain pump fluidly connected with the first water reservoir.

### Claim 3 (depends on 2)

The cooking device according to claim 2, wherein the drain pump is fluidly connected with a conduit leading directly or indirectly to a device outlet.

### Claim 4 (depends on 1)

The cooking device according to claim 1, wherein the second interior chamber is fluidly connected with a third interior chamber via a connecting conduit, and wherein the third reservoir is disposed in the third interior chamber.

### Claim 5 (depends on 1)

The cooking device according to claim 1, wherein the first water level and the second water level have different or the same levels.

### Claim 6 (depends on 1)

The cooking device according to claim 1, wherein the second reservoir is fluidly connected with a circulating pump disposed in a recirculating conduit leading to the first interior chamber.

### Claim 7 (depends on 1)

The cooking device according to claim 1, further comprising a fresh water supply inlet fluidly connected to the second interior chamber.

### Claim 8 (depends on 4)

The cooking device according to claim 4, wherein the second interior chamber comprises an associated container and the third interior chamber comprises a separate associated container, and wherein the associated containers are fluidly connected to each other by a connecting conduit.

### Claim 9 (depends on 8)

The cooking device according to claim 8, wherein the associated container of the second interior chamber is made from sheet metal.

### Claim 10 (depends on 8)

The cooking device according to claim 8, wherein the associated container of the third interior chamber is made from plastic.

### Claim 11 (depends on 1)

The cooking device according to claim 1, wherein the second air trap comprises an air trap to the environment.

### Claim 12 (depends on 1)

The cooking device according to claim 1, further comprising a dosing pump fluidly connected with the second chamber via a dip tube.

### Claim 13 (depends on 12)

The cooking device according to claim 12, further comprising a filling tube fluidly connected with the dip tube.

### Claim 14 (depends on 3)

The cooking device according to claim 3, further comprising a temperature sensor disposed adjacent to the device outlet.

### Claim 15 (depends on 1)

The cooking device according to claim 1, wherein the first water reservoir and the second water reservoir are disposed in a single container.