# US 2017/0284601 A1 · Pressure container > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0284601 A1 - Document ID: US20170284601A1 - Status: Published application - Kind: A1 - Application number: 15/444,449 - Filed: 2017-02-28 - Published: 2017-10-05 - Earliest claimed: 2016-03-29 - Assignees: Toyoda Gosei Co., Ltd. - Applicants: Toyoda Gosei Co., Ltd. - Inventors: Kosuke KUSABA; Takashi MITSUDA; Kenji KIMURA - Web page: https://patentgrep.com/patent/US20170284601A1 ## CPC - F17C 1/04: Protecting sheathings - F17C 1/06: built-up from wound-on bands or filamentary material, e.g. wires - F17C 1/08: Integral reinforcements, e.g. ribs - F17C 2201/0109: with exteriorly curved end-piece - F17C 2201/056: Small (<1 m3) - F17C 2203/0604: Liners - F17C 2203/0619: with two layers - F17C 2203/0658: Synthetics - F17C 2203/066: Plastics - F17C 2203/0663: in form of fibers or filaments - F17C 2205/0302: Fittings, valves, filters, or components in connection with the gas storage device - F17C 2205/0305: Bosses, e.g. boss collars - F17C 2260/01: Improving mechanical properties or manufacturing - F17C: VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00; variable-capacity gas-holders F17B; liquefaction or refrigeration machines, plants, or systems F25) ## Abstract A liner includes a covering portion that covers an inner surface over the entire circumference of the inner surface of a flange portion of a mouthpiece. A covering opposing portion, which is the inner surface of the flange portion and covered with the covering portion, includes a holding groove and a seal groove provided on the radially outer side of the flange portion than on the holding groove. At an axial cross-section of a pressure container, the holding groove is provided to extend, from a groove opening toward a groove bottom, in a direction inclined toward a radially inner side of the flange portion with respect to an axial direction of the boss portion, and the seal groove is provided to extend, from the groove opening toward the groove bottom, in a direction different from a direction in which the holding groove extends. The covering portion includes a holding rib fitted into the holding groove so as to be movable forward and backward within the holding groove, and a seal rib fitted into the seal groove. ## Claims ### Claim 1 A pressure container comprising: a mouthpiece including a boss portion which has a cylindrical shape and a flange portion which protrudes toward a radially outer side from the boss portion; and a liner which is made of resin and is integrated with the flange portion of the mouthpiece to define an internal space together with the mouthpiece, wherein the flange portion has an inner surface that faces the internal space, the liner includes a covering portion that covers at least one part of the inner surface over an entire circumference of the inner surface of the flange portion, a covering opposing portion, which is the inner surface of the flange portion and is covered with the covering portion, includes a holding groove and a seal groove provided on a radially outer side of the flange portion than on the holding groove, at an axial cross-section parallel to a center axis of the boss portion, the holding groove is provided to extend, from a groove opening toward a groove bottom, in a direction inclined toward a radially inner side of the flange portion with respect to an axial direction of the boss portion, and the seal groove is provided to extend, from the groove opening toward the groove bottom, in a direction different from a direction in which the holding groove extends, and the covering portion includes a holding rib fitted into the holding groove so as to be movable forward and backward within the holding groove, and a seal rib fitted into the seal groove. ### Claim 2 (depends on 1) The pressure container according to claim 1, wherein the inner surface of the flange portion of the mouthpiece includes, at the covering opposing portion, a bottom portion and a side portion located on the radially outer side of the flange portion than on the bottom portion and extending in a direction intersecting the bottom portion, the bottom portion includes the holding groove, and the side portion includes the seal groove. ### Claim 3 (depends on 1) The pressure container according to claim 1, wherein at the axial cross-section of the boss portion, the seal groove is provided to extend, from the groove opening toward the groove bottom, in a perpendicular direction with respect to the covering opposing portion or is provided to extend, from the groove opening toward the groove bottom, in a direction inclined toward an outer circumferential edge side of the covering opposing portion with respect to the perpendicular direction. ### Claim 4 (depends on 1) The pressure container according to claim 1, wherein the covering opposing portion includes a plurality of the seal grooves. ### Claim 5 (depends on 4) The pressure container according to claim 4, wherein the covering opposing portion includes two of the seal grooves, and at the axial cross-section of the boss portion, the two seal grooves are provided to extend from the groove opening toward a groove back in a direction of approaching each other. ### Claim 6 (depends on 1) The pressure container according to claim 1, wherein the seal rib includes a rib step-like portion. ### Claim 7 (depends on 5) The pressure container according to claim 5, wherein the seal rib includes a step-like portion. ### Claim 8 (depends on 7) The pressure container according to claim 7, wherein at the axial cross-section of the boss portion, the seal groove is provided to extend, from the groove opening toward the groove bottom, in a perpendicular direction with respect to the covering opposing portion or is provided to extend, from the groove opening toward the groove bottom, in a direction inclined toward an outer circumferential edge side of the covering opposing portion with respect to the perpendicular direction. ### Claim 9 (depends on 8) The pressure container according to claim 8, wherein the inner surface of the flange portion of the mouthpiece includes, at the covering opposing portion, a bottom portion and a side portion located on the radially outer side of the flange portion than on the bottom portion and extending in a direction intersecting the bottom portion, the bottom portion includes the holding groove, and the side portion includes the seal groove.