# US 9,750,335 B2 · Portable interdental toothbrush > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,750,335 B2 - Document ID: US9750335B2 - Status: Granted - Kind: B2 - Application number: 14/903,281 - Filed: 2014-07-17 - Published: 2017-05-11 - Granted: 2017-09-05 - Earliest claimed: 2014-07-17 - Applicants: Sang Geun Lee - Inventors: Sang Geun Lee - Web page: https://patentgrep.com/patent/US9750335B2 ## CPC - A46B 9/04: {Arranged like in or} for toothbrushes - A46B 9/026: {where the surface of the brush body or carrier is not in one plane, e.g. not flat (A46B9/005 takes precedence)} - A46B 11/002: {pressurised at moment of use manually or by powered means} - A46B 11/0041: {Flexible or deformable reservoirs, e.g. resilient bulbs, compressible tubes} - A61C 15/00: Devices for cleaning between the teeth - A46B 2200/108: Inter-dental toothbrush, i.e. for cleaning interdental spaces specifically - A46B: BRUSHES (handles not integral with brushware B25G) - 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) ## Abstract According to the portable interdental toothbrush in accordance with to the present invention, when the interdental toothbrush is carried without using it, the cleaning solution is not discharged since the elastic ball disposed on the assembly protrusion of the cleaning solution tube is closely adhered to the outflow grooves and passing grooves, and, when it is used, the cleaning solution is discharged through the discharge hole, passes through the passing grooves, and reaches the brush since the elastic ball is separated and apart from the outflow grooves, whereby it is convenient to use and carry, it has a simple structure to enable mass production at a low cost, and it allows any user to use which promotes the dental and oral health for citizens. ## Claims ### Claim 1 A portable interdental toothbrush (A) comprising: a bottle-shaped cleaning solution tube (1) receiving a cleaning solution (S) containing fluorine; a brush assembly (2) in which an assembly groove hole (21) for a bottleneck portion of the cleaning solution tube (1) to be inserted and assembled is formed on one end and a brush (22) is fixed to the other end; and an elastic ball (3) which can be expanded and contracted and is disposed on a tip of the cleaning solution tube (1) inside the brush assembly (2). ### Claim 2 (depends on 1) The portable interdental toothbrush of claim 1, wherein the cleaning solution tube (1) is made of synthetic resins to make its manufacturing convenient, and comprises: a tube body (10) in which a cleaning solution (S) is received; an assembly protrusion (11) protruded with a small diameter in which a discharge hole (12) for being equivalent to a bottleneck portion extended from the tube body (10) with a small diameter and discharging the cleaning solution (S) is formed on a tip and an assembly screw portion (13) is formed outside a lower portion; and an engaging protrusion (14) formed on a severed portion between the tube body (10) and the assembly protrusion (11). ### Claim 3 (depends on 1) The portable interdental toothbrush of claim 1, wherein, in the brush assembly (2), the brush (22) is fixed on one end and the assembly groove hole (21) is formed on the other end, a negative screw portion (24) for engaging with assembly screw portion (13) is formed inside of a lower part of the assembly groove hole (21), a plurality of outflow grooves (25a) are formed in a longitudinal direction on an inner wall of a middle space (25), which is located in the middle of the assembly groove hole (21) and in which an elastic ball (3) is inserted, a brush fixing hole (27) into which a fixing rod (26) fixed on one end of the brush (22) is inserted and fixed is formed in the upper portion of the middle space (25). ### Claim 4 (depends on 3) The portable interdental toothbrush of claim 3, wherein a plurality of passing grooves (26a) are formed in a longitudinal direction on an outer surface of the fixing rod (26) fixed on one end of the brush (22), and the fixing rod (26) is inserted and fixed into the brush fixing hole (27) formed on one end of the brush assembly (2) to form the passing grooves (26a) through which the cleaning solution passes. ### Claim 5 A portable interdental toothbrush (A) comprising: a bottle-shaped cleaning solution tube (1) receiving a cleaning solution (S) containing fluorine; a brush assembly (2) in which an assembly groove hole (21) for a bottleneck portion of the cleaning solution tube (1) to be inserted and assembled is formed on one end and a brush (22) is fixed to the other end; and an elastic ball (3) which can be expanded and contracted and is disposed on a tip of the cleaning solution tube (1) inside the brush assembly (2), wherein: the cleaning solution tube (1) is made of synthetic resins to make its manufacturing convenient, and comprises a tube body (10) in which a cleaning solution (S) is received; and an assembly protrusion (11) protruded with a smaller diameter than that of the cleaning solution tube (1), in which a discharge hole (12) for being equivalent to a bottleneck portion extended from the tube body (10) with a small diameter and discharging the cleaning solution (S) is formed on a tip and a plurality of semicircular protrusions (17) apart from each other circularly are formed protruded outside a lower portion; and, in the brush assembly (2), the brush (22) is fixed on one end, and the assembly groove hole (21) is formed on the other end, and insertion grooves (27) apart from each other to correspond to the semicircular protrusions (17) are formed circularly inside the lower part of the assembly groove hole (21) to be snap-assembled to the semicircular protrusions (17). ### Claim 6 A potable interdental toothbrush (A) comprising: a bottle-shaped cleaning solution tube (1) receiving a cleaning solution (S) containing fluorine; a brush assembly (2) in which an assembly groove hole (21) for a bottleneck portion of the cleaning solution tube (1) to be inserted and assembled is formed on one end and a brush (22) is fixed to the other end; and an elastic bell (3) which can be expanded and contracted and is disposed on a tip of the cleaning solution tube (1) inside the brush assembly (2), wherein: the cleaning solution tube (1) is made of synthetic resins to make its manufacturing convenient, and comprises a tube body (10) in which a cleaning solution (S) is received; and an assembly protrusion (11) protruded with a smaller diameter than that of the cleaning solution tube (1), in which a discharge hole (12) for being equivalent to a bottleneck portion extended from the tube body (10) with a small diameter and discharging the cleaning solution (S) is formed on a tip and a screw protrusion (18) of one or two turns is formed on a side portion, and, in the brush assembly (2), the brush (22) is fixed on one end, and the assembly groove hole (21) is formed on the other end, and a screw groove (29) of one or two turns to correspond to the screw protrusion (18) is formed inside of the lower part of the assembly groove hole (21). ### Claim 7 (depends on 6) The portable interdental toothbrush of claim 6, wherein a protruded rim (11a) for preventing backflow is formed in an upper part of the assembly protrusion (11) and a receiving groove (21a) for the protruded rim (11a) for preventing backflow is formed on an upper part of an inner surface of a lower end of the assembly groove hole (21) of the brush assembly (2).