# US 11,079,020 B2 · Seal ring and seal structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,020 B2 - Document ID: US11079020B2 - Status: Granted - Kind: B2 - Application number: 16/208,723 - Filed: 2018-12-04 - Published: 2019-06-20 - Granted: 2021-08-03 - Earliest claimed: 2017-12-18 - Assignees: Illinois Tool Works Inc. - Applicants: Illinois Tool Works Inc. - Inventors: Yue Ma - Web page: https://patentgrep.com/patent/US11079020B2 ## CPC - F16J 15/3232: having two or more lips - F16J 15/002: {comprising at least two sealings in succession (F16J15/162, F16J15/40 take precedence)} - F16J 15/3204: with at least one lip - F16J 15/3216: supported in a direction parallel to the surfaces - F16J 15/322: supported in a direction perpendicular to the surfaces - F16J 15/3236: with at least one lip for each surface, e.g. U-cup packings - F16J 15/324: Arrangements for lubrication or cooling of the sealing itself - F16J 15/3268: Mounting of sealing rings - F16J 15/328: Manufacturing methods specially adapted for elastic sealings (moulding B29C) - F16J 15/3284: characterised by their structure; Selection of materials - F01P 7/16: by thermostatic control - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS - F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28) ## Abstract A seal ring is provided for sealing a rotating shaft. The seal ring has an outer wall and an inner wall. The outer wall includes one or more external ribs, and the external ribs are disposed along a circumferential direction of the outer wall. The inner wall includes one or more seal contact parts extending inwards from the inner wall, and the seal contact parts are disposed along a circumferential direction of the inner wall. The seal ring is made of an elastic material. ## Claims ### Claim 1 A seal structure ring comprising: a housing comprising a partition board; a first seal ring having an outer wall and an inner wall, wherein the outer wall includes one or more external ribs, the external ribs being disposed along a circumferential direction of the outer wall, wherein the inner wall includes one or more seal contact parts extending inwards from the inner wall, the seal contact parts being disposed along a circumferential direction of the inner wall; a supporting part extending downward from a lower surface of the partition board, wherein the first seal ring abuts against the supporting part; a second seal ring positioned above the first seal ring; a valve body, a downwardly recessed cavity being provided at a top portion of the valve body; and a rotating shaft extending through an opening of the partition board and passing through the cavity, the first seal ring and the second seal ring abutting against the rotating shaft, wherein an adjustment contact part is provided at a bottom portion of the cavity of the valve body, and an adjustment space is provided between the adjustment contact part and a lower portion of the first seal ring. ### Claim 2 (depends on 1) The seal structure according to claim 1, wherein the first seal ring includes two seal contact parts, wherein one of the seal contact parts extends obliquely upwards from the inner wall, and the other of the seal contact parts extends obliquely downwards from the inner wall. ### Claim 3 (depends on 2) The seal structure according to claim 2, wherein an axial section of the first seal ring is a K-shaped structure, and a recessed part is provided between the two seal contact parts, the recessed part being configured to receive a lubricant. ### Claim 4 (depends on 1) The seal structure according to claim 1, wherein the second seal ring includes one seal contact part, wherein the seal contact part of the second seal ring extends obliquely downwards from an inner wall of the second seal ring so that an axial section of the second seal ring is a Y-shaped structure, and wherein a hook component is provided at an upper end of the second seal ring, the hook component being disposed along a circumferential direction of the inner wall of the second seal ring for restricting the second seal ring from sliding downwards along an axial direction. ### Claim 5 (depends on 1) The seal structure according to claim 1, wherein the first seal ring is made of an elastic material, and wherein the elastic material is ethylene propylene diene rubber. ### Claim 6 (depends on 1) The seal structure according to claim 1, wherein the first seal ring is injection molded. ### Claim 7 A seal structure, comprising: a housing comprising a partition board; a seal ring having an outer wall and an inner wall, wherein the outer wall includes one or more external ribs, the external ribs being disposed along a circumferential direction of the outer wall, and wherein the inner wall includes one or more seal contact parts extending inwards from the inner wall, the seal contact parts being disposed along a circumferential direction of the inner wall; a supporting part extending downward from a lower surface of the partition board; a valve body, a downwardly recessed cavity being provided at a top portion of the valve body; and a rotating shaft extending through an opening of the partition board and, passing through the cavity, the seal ring being disposed between the supporting part and the rotating shaft, wherein an adjustment contact part is provided at a bottom portion of the cavity of the valve body, and an adjustment space is provided between the adjustment contact part and a lower portion of the seal ring, wherein an outer diameter of the adjustment contact part is smaller than an inner diameter of the supporting part, and wherein the seal ring is made of an elastic material. ### Claim 8 (depends on 7) The seal structure according to claim 7, wherein the adjustment contact part protrudes from the bottom portion of the cavity of the valve body. ### Claim 9 (depends on 7) The seal structure of claim 7, wherein the seal ring includes two seal contact parts, wherein one of the seal contact parts extends obliquely upwards from the inner wall, and the other of the seal contact parts extends obliquely downwards from the inner wall. ### Claim 10 (depends on 7) The seal structure of claim 7, wherein the elastic material is ethylene propylene diene rubber. ### Claim 11 A thermostat, comprising: a housing; a partition board arranged in the housing, wherein the partition board divides a space in the housing into an upper chamber and a lower chamber, and wherein a passage extends through the partition board and through the housing; a supporting part extending downward from a lower surface of the partition board; a valve body disposed in the lower chamber of the housing, a downwardly recessed cavity being provided at a top portion of the valve body; a rotating shaft extending through an opening of the partition board and passing through the cavity; a first seal structure positioned between the supporting part and the rotating shaft; and a second seal structure positioned above the first seal structure and abutting against the rotating shaft, wherein an adjustment contact part is provided at a bottom portion of the cavity of the valve body, and an adjustment space is provided between the adjustment contact part and a lower portion of the first seal structure. ### Claim 12 (depends on 11) The thermostat of claim 11, wherein an outer diameter of the adjustment contact part is smaller than an inner diameter of the supporting part. ### Claim 13 (depends on 11) The thermostat of claim 11, wherein the first seal structure comprises a first seal ring having an outer wall and an inner wall, and wherein the outer wall includes one or more external ribs, the external ribs being disposed along a circumferential direction of the outer wall. ### Claim 14 (depends on 13) The thermostat of claim 13, wherein the inner wall includes one or more seal contact parts extending inwards from the inner wall, the seal contact parts being disposed along a circumferential direction of the inner wall. ### Claim 15 (depends on 11) The thermostat of claim 11, wherein the second seal structure comprises a second seal ring, and wherein a hook component is provided at an upper end of the second seal ring. ### Claim 16 (depends on 15) The thermostat of claim 15, wherein the second seal structure further comprises a bearing disposed on the rotating shaft, and wherein a protrusion is provided at a lower end of the bearing. ### Claim 17 (depends on 16) The thermostat of claim 16, wherein the protrusion is configured for being engaged with the hook component to restrict the second seal ring from sliding downwards along an axial direction. ### Claim 18 (depends on 11) The thermostat of claim 11, wherein the adjustment contact part protrudes from the bottom portion of the cavity of the valve body. ### Claim 19 (depends on 11) The thermostat of claim 11, wherein the supporting part extends into the cavity of the valve body.