# US 10,869,535 B2 · Airtight lip cosmetic case having improved sealing capability > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,869,535 B2 - Document ID: US10869535B2 - Status: Granted - Kind: B2 - Application number: 16/334,331 - Filed: 2017-09-19 - Published: 2019-07-04 - Granted: 2020-12-22 - Earliest claimed: 2016-09-22 - Assignees: Pum-Tech Korea Co., Ltd - Applicants: Pum-Tech Korea Co., Ltd; Ctk Co., Ltd - Inventors: Do Hoon Lee - Web page: https://patentgrep.com/patent/US10869535B2 ## CPC - A45D 40/06: Casings wherein movement of the lipstick or like solid is a screwing movement - A45D 40/00: Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks (features common to containers for handling powdery or liquid toiletry or cosmetic substances A45D33/00-A45D37/00; cosmetic or like preparations A61K8/00, A61Q; sample tables or the like G09F5/00) - A45D 40/04: effected by a screw - B65D 41/62: Secondary protective cap-like outer covers for closure members - B65D 53/02: Collars or rings - B65D 83/00: Containers or packages with special means for dispensing contents (dispensing means incorporated in closures B65D47/00) - A45D 40/02: Casings wherein movement of the lipstick or like solid is a sliding movement (A45D40/06 takes precedence) - A45D 2040/0018: {with indirect access, e.g. requiring an initial action for separating the cap from the stick holder} - A45D 2040/0025: {Details of lipstick or like casings} - A45D 2200/051: Airtight containers - A45D 2200/055: Piston or plunger for supplying the liquid to the applicator - B65D 83/76: for dispensing fluent contents by means of a piston - B65D 83/764: the piston cooperating with a screw-thread in the side wall of the container - A45D: HAIRDRESSING OR SHAVING EQUIPMENT (wigs, toupees or the like A41G3/00, A41G5/00; hairdressers' chairs A47C1/04; hair cutting appliances, razors B26B); EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING - B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES ## Abstract An airtight lip cosmetic case having improved sealing capability includes a lower case; a lead shaft which rises inside the lower case by means of a screw rotation; a rising piston which is coupled to the top of the lead shaft and rises together with the lead shaft, and which has a lip cosmetic product attached to the upper side thereof; an upper case which is coupled to the top of the lower case; and an over-cap which is coupled to the lower case so as to open and close the upper case, wherein the over-cap is separately formed of an inner over-cap and an outer over-cap, and the inner over-cap has an elastic groove formed on the lower outer circumference thereof such that the lower inner circumference of the inner over-cap is elastically inserted into the outer circumference of the upper case. ## Claims ### Claim 1 An airtight lip cosmetic case having improved sealing capability in which a lip cosmetic product inside an upper case rises and protrudes when a lower case rotates, the airtight lip cosmetic case comprising: the upper case rotatably coupled to an upper portion of the lower case; a rising piston coupled inside the upper case to rise and having the lip cosmetic product attached to an upper side of the rising piston; and an over-cap for opening and closing the upper case, wherein the over-cap includes an inner over-cap and an outer over-cap, and the inner over-cap is formed on a lower outer circumference thereof with an elastic groove such that, when the over-cap is coupled to the lower case, a lower inner circumference of the inner over-cap elastically contacts and surrounds a lower outer circumference of the upper case. ### Claim 2 (depends on 1) The airtight lip cosmetic case of claim 1, wherein a sealing shoulder is formed on the lower outer circumference of the upper case, in which the sealing shoulder extends downward from the outer circumference of the upper case while being spaced apart from the outer circumference of the upper case by a predetermined distance. ### Claim 3 (depends on 2) The airtight lip cosmetic case of claim 2, wherein an upper outer portion of the sealing shoulder has a curved shape. ### Claim 4 (depends on 1) The airtight lip cosmetic case of claim 1, wherein the upper case is provided on an upper side thereof with an inner cap, in which the inner cap is coupled to the upper case while surrounding an upper portion of the upper case. ### Claim 5 (depends on 1) The airtight lip cosmetic case of claim 1, wherein the rising piston is provided on an outer side thereof with a sealing ring so that the rising piston rises in a state in which the sealing ring comes into tight contact with an inner circumference of the upper case. ### Claim 6 (depends on 1) The airtight lip cosmetic case of claim 1, wherein a sealing protrusion wheel protrudes from an inner circumference of the inner over-cap of the over-cap to come into tight contact with the outer circumference of the upper case. ### Claim 7 (depends on 6) The airtight lip cosmetic case of claim 6, wherein: the upper case includes a sealing shoulder and an inner diameter of the sealing protrusion wheel of the inner over-cap is smaller than an outer diameter of the sealing shoulder of the upper case.