# US 12,760,901 B2 · Movably installed ejector pipe for gas fireplace

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- Number: US 12,760,901 B2
- Document ID: US12760901B2
- Status: Granted
- Kind: B2
- Application number: 18/648,831
- Filed: 2024-04-29
- Published: 2024-11-21
- Granted: 2026-10-13
- Earliest claimed: 2023-05-17
- Assignees: Ningbo Richen Electrical Appliance Co., Ltd
- Applicants: Ningbo Richen Electrical Appliance Co., Ltd
- Inventors: Pengju Yang; Yin Zhou
- Web page: https://patentgrep.com/patent/US12760901B2

## CPC

- F24B 1/199: Fuel-handling equipment
- F23D 14/64: with injectors
- F23D 2203/007: Mixing tubes, air supply regulation
- F23D 2900/21004: for use in gas fed fireplaces
- F24B: DOMESTIC STOVES OR RANGES FOR SOLID FUELS (for solid fuels in combination with gaseous fuels, liquid fuels or other kinds of energy supply F24C1/02); IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
- F23D: BURNERS

## Abstract

Disclosed in the present disclosure is a movably installed ejector pipe for a gas fireplace, the nozzle and the limit seat are fixed to the substrate, the ejector pipe is inserted between the limit seat and the nozzle, the limit seat is provided inside with a first inner bore and a second inner bore of a stepped shape, the first inner bore is below the second inner bore and is larger than the second inner bore, a head of the ejector pipe is provided with a groove. In the gas fireplace provided in the present disclosure, because a limit seat is added, the ejector pipe can swing at a certain angle within the limit seat, so that a placing angle of a burner can be finely adjusted and thereby the burner is in a position that allows for the optimal viewing effect of flame combustion.

## Claims

### Claim 1

A movably installed ejector pipe for a gas fireplace, comprising a nozzle, an ejector pipe, a limit seat, a flexible sealing ring, and a substrate, wherein the substrate is provided with a nozzle fixing hole, and the nozzle is fixed in the nozzle fixing hole; the limit seat has hollow inner bores arranged in a stepped shape, a first inner bore and a second inner bore are formed, the first inner bore is below the second inner bore, a diameter of the first inner bore is larger than that of the second inner bore, and the limit seat is sleeved on the nozzle and fixed by the substrate; the flexible sealing ring is provided on the first inner bore by being in an interference fit therewith; the ejector pipe is inserted between the limit seat and the flexible sealing ring, and an outer diameter of the ejector pipe is larger than an inner diameter of the flexible sealing ring and smaller than an inner diameter of the second inner bore, that is, a gap is formed between an outer surface of the ejector pipe and an inner surface of the second inner bore.

### Claim 2 (depends on 1)

The movably installed ejector pipe for a gas fireplace according to claim 1, wherein a head of the ejector pipe is provided with a groove, the flexible sealing ring is fitted into the groove, and an outer diameter of the groove is larger than the inner diameter of the flexible sealing ring.

### Claim 3 (depends on 1)

The movably installed ejector pipe for a gas fireplace according to claim 1, wherein the gap formed between the outer surface of the ejector pipe and the inner surface of the second inner bore has a width of 0.2 mm to 2.5 mm.

### Claim 4 (depends on 1)

The movably installed ejector pipe for a gas fireplace according to claim 1, further comprising a burner, wherein the burner is provided with a gas inlet; an extension section is provided on an upper half of the ejector pipe, and the gas inlet is sleeved on the extension section.

### Claim 5 (depends on 4)

The movably installed ejector pipe for a gas fireplace according to claim 4, wherein a stop end face is formed between the extension section on the ejector pipe and a lower half of the ejector pipe.

### Claim 6 (depends on 5)

The movably installed ejector pipe for a gas fireplace according to claim 5, wherein a sealing gasket made of a soft material is provided between the stop end face and an end face of the gas inlet.

### Claim 7 (depends on 1)

The movably installed ejector pipe for a gas fireplace according to claim 1, wherein the ejector pipe is provided with several air intake holes, and the air intake holes are located above the limit seat.