Patents by Inventor Masayoshi Sonokawa
Masayoshi Sonokawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11946548Abstract: An apparatus has: a first member; a shaft rotatable relative to the first member about an axis; and a seal system. The seal system has: a seal carried by the first member and having a seal face; a seal housing; a seat carried by the shaft and having a seat face in sliding sealing engagement with the seal face; and a plurality of coil springs biasing the seal face against the seat face, each coil spring having a first end and a second end. The seal has a plurality of spring compartments. Each of the plurality of coil springs is partially within a respective associated compartment of the plurality of spring compartments.Type: GrantFiled: May 17, 2022Date of Patent: April 2, 2024Assignee: RTX CorporationInventors: Masayoshi Sonokawa, Jonathan F. Zimmitti, Nasr A. Shuaib, Sean P. McCutchan
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Patent number: 11578803Abstract: An assembly includes a housing, a carrier, a spring element and a seal element. The housing includes a bore and an annular groove that extends axially along a centerline into the housing from the bore. The carrier projects axially along the centerline into the annular groove. The carrier is configured to translate axially along the centerline relative to the housing. The spring element is arranged within the annular groove. The spring element is configured to bias the carrier axially away from the housing along the centerline. The seal element is mounted to the carrier and arranged within the bore.Type: GrantFiled: November 11, 2019Date of Patent: February 14, 2023Assignee: Raytheon Technologies CorporationInventors: Masayoshi Sonokawa, Jonathan F. Zimmitti, Nasr A. Shuaib
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Publication number: 20220403937Abstract: An apparatus has: a first member; a shaft rotatable relative to the first member about an axis; and a seal system. The seal system has: a seal carried by the first member and having a seal face; a seal housing; a seat carried by the shaft and having a seat face in sliding sealing engagement with the seal face; and a plurality of coil springs biasing the seal face against the seat face, each coil spring having a first end and a second end. The seal has a plurality of spring compartments. Each of the plurality of coil springs is partially within a respective associated compartment of the plurality of spring compartments.Type: ApplicationFiled: May 17, 2022Publication date: December 22, 2022Applicant: Raytheon Technologies CorporationInventors: Masayoshi Sonokawa, Jonathan F. Zimmitti, Nasr A. Shuaib, Sean P. McCutchan
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Patent number: 11371373Abstract: A seal housing may comprise an aft flange, an outer diameter (OD) ring and a stopper. The stopper may extend radially inward from a radially inner surface of OD ring. The stopper may be configured to interface with a monobloc carbon seal. The stopper may comprise a circumferential stopping portion and an axial stopping portion. There may be a plurality of the stopper.Type: GrantFiled: October 29, 2019Date of Patent: June 28, 2022Assignee: Raytheon Technologies CorporationInventors: Masayoshi Sonokawa, Jonathan F. Zimmitti, Nasr A. Shuaib
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Publication number: 20210140547Abstract: An assembly includes a housing, a carrier, a spring element and a seal element. The housing includes a bore and an annular groove that extends axially along a centerline into the housing from the bore. The carrier projects axially along the centerline into the annular groove. The carrier is configured to translate axially along the centerline relative to the housing. The spring element is arranged within the annular groove. The spring element is configured to bias the carrier axially away from the housing along the centerline. The seal element is mounted to the carrier and arranged within the bore.Type: ApplicationFiled: November 11, 2019Publication date: May 13, 2021Inventors: Masayoshi Sonokawa, Jonathan F. Zimmitti, Nasr A. Shuaib
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Publication number: 20210123357Abstract: A seal housing may comprise an aft flange, an outer diameter (OD) ring and a stopper. The stopper may extend radially inward from a radially inner surface of OD ring. The stopper may be configured to interface with a monobloc carbon seal. The stopper may comprise a circumferential stopping portion and an axial stopping portion. There may be a plurality of the stopper.Type: ApplicationFiled: October 29, 2019Publication date: April 29, 2021Applicant: UNITED TECHNOLOGIES CORPORATIONInventors: Masayoshi Sonokawa, Jonathan F. Zimmitti, Nasr A. Shuaib
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Patent number: 10655487Abstract: An annular stator seal support extends radially between a radial inner support side and a radial outer support side. A secondary seal includes a first radially extending secondary seal sidewall surface, a second radially extending secondary seal sidewall surface and a third radially extending secondary seal sidewall surface. An annular stator sleeve support includes a channel radially distal the radial inner support side, the channel includes a first radially extending channel sidewall and a second radially extending channel sidewall located axially forward of the first radially extending channel sidewall, and a third radially extending channel sidewall located axially behind the first radially extending channel sidewall. The first radially extending seal sidewall surface contacts the first radially extending channel sidewall, and the second radially extending channel sidewall is axially spaced from the second radially extending secondary seal sidewall surface.Type: GrantFiled: February 15, 2018Date of Patent: May 19, 2020Assignee: Raytheon Technologies CorporationInventors: Masayoshi Sonokawa, Rachel A. McGrath
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Publication number: 20190249559Abstract: An annular stator seal support extends radially between a radial inner support side and a radial outer support side. A secondary seal includes a first radially extending secondary seal sidewall surface, a second radially extending secondary seal sidewall surface and a third radially extending secondary seal sidewall surface. An annular stator sleeve support includes a channel radially distal the radial inner support side, the channel includes a first radially extending channel sidewall and a second radially extending channel sidewall located axially forward of the first radially extending channel sidewall, and a third radially extending channel sidewall located axially behind the first radially extending channel sidewall. The first radially extending seal sidewall surface contacts the first radially extending channel sidewall, and the second radially extending channel sidewall is axially spaced from the second radially extending secondary seal sidewall surface.Type: ApplicationFiled: February 15, 2018Publication date: August 15, 2019Inventors: Masayoshi Sonokawa, Rachel A. McGrath
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Patent number: 10167734Abstract: A seal support and duct assembly of a gas turbine engine includes a seal support housing disposed about a central axis, a duct housing attached to the seal support housing, the duct housing and the seal support housing defining the seal support and duct assembly, an outer annular cavity, an inlet that supplies the outer annular cavity with cooling buffer air, an inner annular cavity disposed radially inward of the outer annular cavity, a first plurality of outlets that provide the cooling buffer air from the outer annular cavity to the inner annular cavity, and a second plurality of outlets that provide the cooling buffer air from the inner annular cavity to an area surrounding a bearing compartment.Type: GrantFiled: March 15, 2013Date of Patent: January 1, 2019Assignee: UNITED TECHNOLOGIES CORPORATIONInventors: Masayoshi Sonokawa, Russell B. Witlicki, Christopher J. Larson, Robert C. Stutz, Eric Charles Mundell, Marc J. Muldoon
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Patent number: 9683451Abstract: A seal assembly is provided that extends along an axial centerline. The seal assembly includes a seal support, a seal housing, a plurality of torque pins and a plurality of stopper collars. The seal housing includes a plurality of slots arranged circumferentially around the centerline. The slots extend axially through the seal housing, and one or more of the slots has a lateral slot width. The torque pins are connected to the seal support. Each of the torque pins respectively extends axially through a uniquely associated one of the slots to a distal pin end. Each of the stopper collars is uniquely associated with and connected to a respective one of the torque pins at the pin end. One or more of the stopper collars has a lateral collar width that is less than the slot width.Type: GrantFiled: January 4, 2013Date of Patent: June 20, 2017Assignee: United Technologies CorporationInventors: Masayoshi Sonokawa, Russell B. Witlicki
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Patent number: 9316119Abstract: An exemplary turbomachine secondary ring seal assembly includes a base portion that extends circumferentially about an axis and a protrusion extending from the base portion toward the axis. The protrusion has a sealing surface that contacts a support to limit movement of a fluid from a first axial side of the base portion to a second opposite axial side of the base portion. The sealing surface faces the axis. The sealing surface may also face in a radial direction.Type: GrantFiled: September 15, 2011Date of Patent: April 19, 2016Assignee: United Technologies CorporationInventor: Masayoshi Sonokawa
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Publication number: 20150337674Abstract: A seal assembly is provided that extends along an axial centerline. The seal assembly includes a seal support, a seal housing, a plurality of torque pins and a plurality of stopper collars. The seal housing includes a plurality of slots arranged circumferentially around the centerline. The slots extend axially through the seal housing, and one or more of the slots has a lateral slot width. The torque pins are connected to the seal support. Each of the torque pins respectively extends axially through a uniquely associated one of the slots to a distal pin end. Each of the stopper collars is uniquely associated with and connected to a respective one of the torque pins at the pin end. One or more of the stopper collars has a lateral collar width that is less than the slot width.Type: ApplicationFiled: January 4, 2013Publication date: November 26, 2015Inventors: Masayoshi Sonokawa, Russell B. Witlicki
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Publication number: 20150240660Abstract: A seal support and duct assembly of a gas turbine engine includes a seal support housing disposed about a central axis, a duct housing attached to the seal support housing, the duct housing and the seal support housing defining the seal support and duct assembly, an outer annular cavity, an inlet that supplies the outer annular cavity with cooling buffer air, an inner annular cavity disposed radially inward of the outer annular cavity, a first plurality of outlets that provide the cooling buffer air from the outer annular cavity to the inner annular cavity, and a second plurality of outlets that provide the cooling buffer air from the inner annular cavity to an area surrounding a bearing compartment.Type: ApplicationFiled: March 15, 2013Publication date: August 27, 2015Inventors: Masayoshi Sonokawa, Russell B. Witlicki, Christopher J. Larson, Robert C. Stutz, Eric Charles Mundell, Marc J. Muldoon
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Publication number: 20130069313Abstract: An exemplary turbomachine secondary ring seal assembly includes a base portion that extends circumferentially about an axis and a protrusion extending from the base portion toward the axis. The protrusion has a sealing surface that contacts a support to limit movement of a fluid from a first axial side of the base portion to a second opposite axial side of the base portion. The sealing surface faces the axis. The sealing surface may also face in a radial direction.Type: ApplicationFiled: September 15, 2011Publication date: March 21, 2013Inventor: Masayoshi Sonokawa
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Patent number: 7984911Abstract: A face seal for a gas turbine engine comprises a seal body that has a contact face to engage a rotating surface. The contact face is defined as an area extending radially between an inner diameter of the seal body and an outer diameter of the seal body at one seal end providing a radial width. The radial width is between greater than 0.15 inch (3.81 mm).Type: GrantFiled: May 27, 2009Date of Patent: July 26, 2011Assignee: United Technologies CorporationInventors: Louis J. Dobek, Masayoshi Sonokawa, Harold K. Shaffer, Mark Story
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Publication number: 20090230628Abstract: A face seal for a gas turbine engine comprises a seal body that has a contact face to engage a rotating surface. The contact face is defined as an area extending radially between an inner diameter of the seal body and an outer diameter of the seal body at one seal end providing a radial width. The radial width is between greater than 0.15 inch (3.81 mm).Type: ApplicationFiled: May 27, 2009Publication date: September 17, 2009Inventors: Louis J. Dobek, Masayoshi Sonokawa, Harold K. Shaffer, Mark Story
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Patent number: 5188572Abstract: In an internally meshing planetary gear structure with trochoidal tooth profile, the input shaft and the eccentric body are coupled so that radial displacement is possible and that the displacement between the eccentric body shaft and the input shaft is absorbed. In addition to this, positioning members or thrust bearings are used to suppress the axial movement or the inclination of the eccentric body or the external-toothed gears.Type: GrantFiled: November 25, 1991Date of Patent: February 23, 1993Assignee: Sumitomo Heavy Industries, Ltd.Inventors: Katsuyoshi Yamaguchi, Masatoshi Kondoh, Shigeo Hayashi, Masayoshi Sonokawa, Shoichi Matsuzawa, Atsushi Takahashi