# US 11,028,934 B2 · Pressure control apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,934 B2 - Document ID: US11028934B2 - Status: Granted - Kind: B2 - Application number: 16/558,320 - Filed: 2019-09-03 - Published: 2020-03-05 - Granted: 2021-06-08 - Earliest claimed: 2018-09-03 - Assignees: Nidec Tosok Corporation - Applicants: Nidec Tosok Corporation - Inventors: Takeshi Nakano - Web page: https://patentgrep.com/patent/US11028934B2 ## CPC - F16K 27/041: {cylindrical slide valves} - F16H 57/0447: {Control of lubricant levels, e.g. lubricant level control dependent on temperature} - F16H 57/0489: {with endless flexible members, e.g. belt CVTs} - F16K 3/24: with cylindrical valve members - F16K 11/07: with cylindrical slides - F16H 61/0009: {Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units} - F16H 61/0021: {Generation or control of line pressure} - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - F16H: GEARING ## Abstract Provided is a pressure control apparatus in which workability in assembly of a body, a spool valve, a retainer, and an elastic member is improved and a high degree of freedom in a design of installation of the spool valve is obtained. A pressure control apparatus includes: a body having an opening portion penetrating a wall portion which demarcates a spool hole; a spool valve that is disposed displaceably in the spool hole; a plate-shaped retainer disposed at one end side of the spool valve in an axial direction in the spool hole; and an elastic member 6 disposed between the spool valve in the spool hole and the retainer. The retainer has a wide portion and a narrow portion. The opening portion has a first opening portion that allows the retainer to pass through and a second opening portion that inhibits the retainer from passing through. ## Claims ### Claim 1 A pressure control apparatus comprising: a body having: a flow channel through which a fluid passes, a columnar spool hole connected to the flow channel, wherein a large opening portion is provided at one end side of the spool hole in an axial direction, and an opening portion penetrating a wall portion which demarcates the spool hole; a spool valve that is disposed displaceably along the axial direction in the spool hole and opens and closes the flow channel; a plate-shaped retainer disposed at one end side of the spool valve and another end side of the large opening portion in the axial direction in the spool hole; and an elastic member that is disposed between the spool valve in the spool hole and the retainer, presses the spool valve toward another end side in the axial direction, and presses the retainer toward the one end side in the axial direction; wherein the retainer has a wide portion that functions as a spring seat with which one end portion of the elastic member in the axial direction comes into contact and at least one narrow portion that extends from the wide portion in a first orthogonal direction orthogonal to the axial direction and has a width narrower than a width of the wide portion, and wherein the opening portion has a first opening portion that has an opening width in a second orthogonal direction orthogonal to the axial direction being wider than the width of the wide portion and allows the retainer to pass through, and a second opening portion that is connected to the first opening portion at one end side in the axial direction, the second opening portion has an opening width in the second orthogonal direction being narrower than the width of the wide portion, and inhibits the retainer from passing through. ### Claim 2 (depends on 1) The pressure control apparatus according to claim 1, wherein, in a state that the retainer is positioned at the second opening portion, the narrow portion is accommodated in the second opening portion. ### Claim 3 (depends on 1) The pressure control apparatus according to claim 1, wherein the wall portion has a restriction portion that restricts movement of the retainer positioned at the second opening portion toward one end side in the axial direction. ### Claim 4 (depends on 2) The pressure control apparatus according to claim 2, wherein the wall portion has a restriction portion that restricts movement of the retainer positioned at the second opening portion toward one end side in the axial direction. ### Claim 5 (depends on 1) The pressure control apparatus according to claim 1, wherein the at least one narrow portion comprises a pair of narrow portions disposed at mutually opposite sides with the wide portion interposed between the pair of narrow portions. ### Claim 6 (depends on 2) The pressure control apparatus according to claim 2, wherein the at least one narrow portion comprises a pair of narrow portions disposed at mutually opposite sides with the wide portion interposed between the pair of narrow portions. ### Claim 7 (depends on 3) The pressure control apparatus according to claim 3, wherein the at least one narrow portion comprises a pair of narrow portions disposed at mutually opposite sides with the wide portion interposed between the pair of narrow portions. ### Claim 8 (depends on 4) The pressure control apparatus according to claim 4, wherein the at least one narrow portion comprises a pair of narrow portions disposed at mutually opposite sides with the wide portion interposed between the pair of narrow portions. ### Claim 9 (depends on 5) The pressure control apparatus according to claim 5, wherein the wall portion has a restriction portion that restricts movement of the retainer positioned at the second opening portion toward one end side in the axial direction, and wherein the restriction portion is an opening portion which penetrates the wall portion at an opposite side of the second opening portion with a central axis of the wall portion interposed between the opening portion and the second opening portion and in which one of the pair of narrow portions is accommodated. ### Claim 10 (depends on 6) The pressure control apparatus according to claim 6, wherein the wall portion has a restriction portion that restricts movement of the retainer positioned at the second opening portion toward one end side in the axial direction, and wherein the restriction portion is an opening portion which penetrates the wall portion at an opposite side of the second opening portion with a central axis of the wall portion interposed between the opening portion and the second opening portion and in which one of the pair of narrow portions is accommodated. ### Claim 11 (depends on 7) The pressure control apparatus according to claim 7, wherein the wall portion has a restriction portion that restricts movement of the retainer positioned at the second opening portion toward one end side in the axial direction, and wherein the restriction portion is an opening portion which penetrates the wall portion at an opposite side of the second opening portion with a central axis of the wall portion interposed between the opening portion and the second opening portion and in which one of the pair of narrow portions is accommodated. ### Claim 12 (depends on 8) The pressure control apparatus according to claim 8, wherein the wall portion has a restriction portion that restricts movement of the retainer positioned at the second opening portion toward one end side in the axial direction, and wherein the restriction portion is an opening portion which penetrates the wall portion at an opposite side of the second opening portion with a central axis of the wall portion interposed between the opening portion and the second opening portion and in which one of the pair of narrow portions is accommodated. ### Claim 13 (depends on 1) The pressure control apparatus according to claim 1, wherein the body has a main body portion that demarcates the flow channel and a tubular portion that is defined by the wall portion and projects on the main body portion. ### Claim 14 (depends on 2) The pressure control apparatus according to claim 2, wherein the body has a main body portion that demarcates the flow channel and a tubular portion that is defined by the wall portion and projects on the main body portion. ### Claim 15 (depends on 3) The pressure control apparatus according to claim 3, wherein the body has a main body portion that demarcates the flow channel and a tubular portion that is defined by the wall portion and projects on the main body portion. ### Claim 16 (depends on 4) The pressure control apparatus according to claim 4, wherein the body has a main body portion that demarcates the flow channel and a tubular portion that is defined by the wall portion and projects on the main body portion. ### Claim 17 (depends on 5) The pressure control apparatus according to claim 5, wherein the body has a main body portion that demarcates the flow channel and a tubular portion that is defined by the wall portion and projects on the main body portion. ### Claim 18 (depends on 6) The pressure control apparatus according to claim 6, wherein the body has a main body portion that demarcates the flow channel and a tubular portion that is defined by the wall portion and projects on the main body portion. ### Claim 19 (depends on 9) The pressure control apparatus according to claim 9, wherein the body has a main body portion that demarcates the flow channel and a tubular portion that is defined by the wall portion and projects on the main body portion. ### Claim 20 (depends on 10) The pressure control apparatus according to claim 10, wherein the body has a main body portion that demarcates the flow channel and a tubular portion that is defined by the wall portion and projects on the main body portion.