# US 2021/0274923 A1 · 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 2021/0274923 A1 - Document ID: US20210274923A1 - Status: Published application - Kind: A1 - Application number: 17/251,687 - Filed: 2019-04-23 - Published: 2021-09-09 - 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/US20210274923A1 ## CPC - A61C 17/0202: {Hand-pieces} - A46B 11/0037: {A piston or plunger advanced by direct pushing along the side of brush handle} - A46B 11/0062: {Brushes where the reservoir is specifically intended for being refilled when empty} - A61C 17/02: Rinsing or air-blowing devices, e.g. using fluid jets {or comprising liquid medication} (combined with receptacles for spittle A61C17/14; combined with power-driven cleaning or polishing devices A61C17/16) - A61C 17/227: {with reservoirs, e.g. for toothpaste} - A61C 17/3454: {Translation along the axis perpendicular of the axis of toothbrush handle and in the plane defined by the bristle holder} - A46B 5/0095: {Removable or interchangeable brush heads} - A46B 9/04: {Arranged like in or} for toothbrushes - 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 for receiving working fluid from the reservoir, and for delivering working fluid to the oral cavity of a user. The fluid reservoir includes a fluid port from which fluid is dispensed from the fluid reservoir, and through which the fluid reservoir is replenished. The fluid reservoir is moveable along the handle between a first position in which the fluid port is connected to the fluid delivery system, and a second position in which the fluid port is exposed to allow the fluid reservoir to be replenished. ## Claims ### Claim 1 A dental cleaning appliance comprising: a handle; a fluid reservoir for storing a working fluid, the fluid reservoir comprising a fluid port through which the fluid reservoir is replenished; and a fluid delivery system for receiving working fluid from the reservoir, the fluid delivery system comprising a nozzle for delivering working fluid to the oral cavity of a user; wherein the fluid reservoir is moveable along the handle between a first position in which the fluid port is connected to the fluid delivery system, and a second position in which the fluid port is exposed to allow the fluid reservoir to be replenished, the fluid reservoir moving towards the nozzle as it moves from the first position towards the second position. ### Claim 2 (depends on 1) The appliance of claim 1, wherein the fluid reservoir is slidable along the handle. ### Claim 3 (depends on 1) The appliance of claim 1, wherein the fluid reservoir extends around the handle. ### Claim 4 (depends on 1) The appliance of claim 1, wherein the handle comprises a first section which is gripped by a user during use of the appliance, and a second section which is spaced from the first section, and wherein the fluid reservoir moves along the second section of the handle. ### Claim 5 (depends on 4) The appliance of claim 4, wherein the second section of the handle is located proximate to an end of the handle. ### Claim 6 (depends on 5) The appliance of claim 5, wherein the second section of the handle defines, at least in part, the end of the handle. ### Claim 7 (depends on 4) The appliance of claim 4, wherein, in its first position, the fluid reservoir encloses the second section of the handle. ### Claim 8 (depends on 4) The appliance of claim 4, wherein the second section of the handle has a reduced cross-section relative to the first section of the handle. ### Claim 9 (depends on 4, 5, 6, 7, 8) The appliance according to any of claims 4 to 8 of claim 4, wherein the second section of the handle comprises a tubular external surface, and the fluid reservoir comprises a tubular internal surface which surrounds the external surface of the second section of the handle when the fluid reservoir is in its first position. ### Claim 10 (depends on 9) The appliance of claim 9, wherein the tubular external surface of the second section of the handle has substantially the same shape as the tubular internal surface of the fluid reservoir. ### Claim 11 (depends on 9) The appliance of claim 9, wherein each of the tubular external surface of the second section of the handle and the tubular internal surface of the fluid reservoir has a non-circular cross-section. ### Claim 12 (depends on 4) The appliance of claim 4, wherein the handle comprises a seat for receiving the fluid reservoir when in its first position, and wherein the seat is located between the first section and the second section of the handle. ### Claim 13 (depends on 12) The appliance of claim 12, wherein the seat has a locally-enlarged cross-section compared to the first section of the handle. ### Claim 14 (depends on 13) The appliance of claim 13, wherein the seat is arranged perpendicular to a longitudinal axis of the handle. ### Claim 15 (depends on 14) The appliance of claim 14, wherein the seat is annular in shape. ### Claim 16 (depends on 1) The appliance of claim 1, wherein the fluid delivery system comprises a head and a stem extending between the head and the handle, and wherein, in its second position, at least part of the fluid reservoir extends about the stem. ### Claim 17 (depends on 16) The appliance of claim 16, wherein the stem is detachable from the handle.