# US 11,998,414 B2 · Dental treatment appliance

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,998,414 B2
- Document ID: US11998414B2
- Status: Granted
- Kind: B2
- Application number: 17/251,699
- Filed: 2019-04-23
- Published: 2021-09-09
- Granted: 2024-06-04
- Earliest claimed: 2018-06-20
- Assignees: Dyson Technology Limited
- Applicants: Dyson Technology Limited
- Inventors: Matthew William Ford; Peter Joel Davies
- Web page: https://patentgrep.com/patent/US11998414B2

## CPC

- A61C 17/36: with rinsing means
- A61C 17/0202: {Hand-pieces}
- A61C 17/22: with brushes, cushions, cups, or the like (brush bodies, e.g. arrangements of the bristles A46B)
- A61C 17/227: {with reservoirs, e.g. for toothpaste}
- A46B 11/0062: {Brushes where the reservoir is specifically intended for being refilled when empty}
- A61C 17/34: driven by electric motor
- A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00)
- A46B: BRUSHES (handles not integral with brushware B25G)

## Abstract

A dental cleaning appliance includes a handle, a fluid reservoir for storing a working fluid, and a fluid delivery system. A motorised drive unit drives movement of a bristle carrier relative to the handle. At least part of an inlet conduit of the fluid delivery system lies adjacent to the external surface of the motor, and at least part of an outlet conduit of the fluid delivery system extends through the motor.

## Claims

### Claim 1

A dental cleaning appliance comprising:
a handle;
a fluid reservoir for storing a working fluid;
a fluid delivery system for receiving working fluid from the reservoir, the fluid delivery system comprising a pump, an inlet conduit for conveying working fluid from the reservoir towards the pump, a nozzle for delivering working fluid to the oral cavity of a user, and an outlet conduit for conveying working fluid from the pump towards the nozzle;
a brush unit comprising a bristle carrier and a plurality of bristles mounted on the bristle carrier; and
a drive unit for driving movement of the bristle carrier relative to the handle, the drive unit comprising a motor;
wherein at least part of the outlet conduit extends through the motor.

### Claim 2 (depends on 1)

The appliance of claim 1, comprising a transmission unit which is driven by the motor to move relative to the handle, and wherein said at least part of the outlet conduit extends through the transmission unit.

### Claim 3 (depends on 1)

The appliance of claim 1, comprising a stem extending between the handle and the brush unit, and wherein the stem is mounted on the transmission unit.

### Claim 4 (depends on 1)

The appliance of claim 1, wherein the handle comprises a grip section which is gripped by a user during use of the appliance, and an end section proximate to the brush unit, and wherein the end section of the handle houses the motor.

### Claim 5 (depends on 4)

The appliance of claim 4, wherein the end section of the handle has a reduced cross-section relative to the grip section of the handle.

### Claim 6 (depends on 4)

The appliance of claim 4, wherein the fluid reservoir is mounted on a seat located between the grip section and the end section of the handle, and wherein said at least part of the inlet conduit extends from the seat towards the pump.

### Claim 7 (depends on 6)

The appliance of claim 6, wherein the seat has a locally-enlarged cross-section compared to the grip section of the handle.

### Claim 8 (depends on 7)

The appliance of claim 7, wherein the seat is arranged perpendicular to a longitudinal axis of the handle.

### Claim 9 (depends on 1)

The appliance of claim 1, wherein at least part of the inlet conduit is adjacent to the external surface of the motor.