# US 10,478,017 B1 · Cooking apparatus utilizing gaseous fuel

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- Number: US 10,478,017 B1
- Document ID: US10478017B1
- Status: Granted
- Kind: B1
- Application number: 15/350,245
- Filed: 2016-11-14
- Granted: 2019-11-19
- Earliest claimed: 2016-11-14
- Assignees: Rankam (China) Manufacturing Co. Ltd.
- Applicants: Rankam (China) Manufacturing Co. Ltd.
- Inventors: Andy Ning Fan Kam
- Web page: https://patentgrep.com/patent/US10478017B1

## CPC

- A23L 5/15: {using wave energy, irradiation, electrical means or magnetic fields, e.g. oven cooking or roasting using radiant dry heat}
- A47J 37/0727: {with gas burners}
- A23L 5/10: General methods of cooking foods, e.g. by roasting or frying
- A47J 37/0786: {Accessories}
- A23V 2002/00: Food compositions, function of food ingredients or processes for food or foodstuffs
- A23L: FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF (preservation thereof A23B)
- A47J: KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A23V: INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION

## Abstract

Briefly, the present disclosure relates, in one embodiment, to a cooking apparatus. The cooking apparatus may include a plurality of chamber walls defining a chamber. The chamber includes a plurality of chamber corners, a chamber bottom end, and a chamber top end. A gas burner including a burner tube is located nearer the chamber bottom end than the chamber top end. The burner tube may include a plurality of tube runs. Each tube run includes a run length extending substantially parallel with a respective chamber wall. A majority of the run length may include a closed wall section of the burner tube. The burner tube may also include a plurality of tube bends. Each tube bend is disposed between two respective tube runs and may include a porous wall section of the burner tube.

## Claims

### Claim 1

A cooking apparatus comprising:
a plurality of chamber walls defining a chamber, the chamber including a plurality of chamber corners, a chamber bottom end, and a chamber top end; and
a gas burner including a burner tube located nearer the chamber bottom end than the chamber top end, the burner tube including:
a plurality of tube runs, each tube run including a run length extending substantially parallel with a respective chamber wall, each tube run including a continuous closed wall section along a majority of the run length such that the tube run has no holes anywhere in the tube run along the majority of the run length; and
a plurality of tube bends, each tube bend disposed between two respective tube runs and including a porous wall section of the burner tube.

### Claim 2 (depends on 1)

The cooking apparatus of claim 1, wherein:
the chamber forms a rectangular enclosure including four chamber corners formed by four chamber walls; and
the burner tube forms a generally rectangular gas burner with four tube bends.

### Claim 3 (depends on 2)

The cooking apparatus of claim 2, wherein the burner tube further includes:
a burner tube intake end and a burner tube termination end, the intake end and the termination end defining a space therebetween;
a partial tube run connected to the burner tube intake end and a respective tube bend; and
a floating tube bend connected to the burner tube termination end and a respective tube run.

### Claim 4 (depends on 1)

The cooking apparatus of claim 1, further comprising:
a plurality of flame director plates, each flame director plate disposed over a respective tube bend.

### Claim 5 (depends on 4)

The cooking apparatus of claim 4, wherein each flame director plate defines at least one flame director hole therein.

### Claim 6 (depends on 4)

The cooking apparatus of claim 4, wherein:
the gas burner tube defines a burner plane; and
each flame director plate forms an acute angle with the burner plane.

### Claim 7 (depends on 4)

The cooking apparatus of claim 4, further comprising:
a grease collector disposed in the chamber nearer the chamber bottom end than the chamber top end, the grease collector blocking at least one closed wall section of the burner tube.

### Claim 8 (depends on 7)

The cooking apparatus of claim 7, wherein the grease collector blocks the closed wall section of each tube run.

### Claim 9 (depends on 8)

The cooking apparatus of claim 8, wherein each flame director plate is connected to the grease collector.

### Claim 10 (depends on 7)

The cooking apparatus of claim 7, further comprising:
a plurality of inner heat shields, each inner heat shield connected to the grease collector adjacent a respective flame director plate.

### Claim 11 (depends on 10)

The cooking apparatus of claim 10, wherein:
each flame director plate defines at least one flame director hole therein; each inner heat shield defines at least one shield hole therein; and
each flame director hole and each shield hole are configured to allow some heat to converge toward the center of the chamber.

### Claim 12 (depends on 10)

The cooking apparatus of claim 10, wherein each inner heat shield is integrally formed with a respective flame director plate.

### Claim 13 (depends on 7)

The cooking apparatus of claim 7, wherein the grease collector further includes:
a plurality of chamfered corners, each chamfered corner positioned over a respective tube bend and configured to define a corner flow passage for the heat emitted from the tube bend.

### Claim 14

A cooking apparatus comprising:
a plurality of chamber walls defining a chamber, the chamber including a plurality of chamber corners, a chamber bottom end, and a chamber top end; and
a gas burner including a burner tube located nearer the chamber bottom end than the chamber top end, the burner tube including:
a plurality of tube runs, each tube run including a run length extending substantially parallel with a respective chamber wall, a majority of the run length including a closed wall section of the burner tube; and
a plurality of tube bends, each tube bend disposed between two respective tube runs and including a porous wall section of the burner tube; and
a plurality of outer heat shields, each outer heat shield disposed between a tube bend and a respective chamber corner.

### Claim 15 (depends on 1)

The cooking apparatus of claim 1, further comprising:
a chamber lid removably disposed on the chamber walls at the chamber top end, the chamber lid and the chamber walls defining a ventilation gap between each chamber wall and the chamber lid.

### Claim 16 (depends on 15)

The cooking apparatus of claim 15, wherein the chamber lid includes a plurality of spacers, each spacer configured to receive a respective chamber wall and to maintain a respective ventilation gap.

### Claim 17 (depends on 15)

The cooking apparatus of claim 15, wherein:
the chamber lid and the ventilation gap are configured to allow steady flow of convective heat in a direction away from the chamber bottom end toward the chamber top end and in a direction from the chamber top end back toward the chamber bottom end; and
the chamber lid is configured to direct radiant heat toward the chamber bottom end.

### Claim 18

A cooking apparatus comprising:
a plurality of chamber walls defining a chamber, the chamber including a plurality of chamber corners, a chamber bottom end, and a chamber top end;
a gas burner including a burner tube located nearer the chamber bottom end than the chamber top end, the burner tube including:
a plurality of tube runs, each tube run including a run length extending substantially parallel with a respective chamber wall; and
a plurality of tube bends, each tube bend disposed between two respective tube runs;
a blocking plate disposed in the chamber nearer the chamber bottom end than the chamber top end, the blocking plate covering a majority of the run length of each tube run, the blocking plate and the chamber walls defining a plurality of corner openings, each corner opening defining a corner flow passageway for heat emitted from the burner tube;
a grease collector disposed in the chamber nearer the chamber bottom end than the chamber top end, the grease collector defining the blocking plate; and
a plurality of flame director plates, each flame director plate disposed over a respective corner opening.

### Claim 19 (depends on 18)

The cooking apparatus of claim 18, further comprising:
a plurality of inner heat shields, each inner heat shield connected to a respective flame director plate and disposed between the flame director plate and a center of the chamber.

### Claim 20 (depends on 19)

The cooking apparatus of claim 19, further comprising:
a plurality of outer heat shields, each outer heat shield disposed between a respective tube bend and a respective chamber corner.