Patents by Inventor Takako HOSOKAWA
Takako HOSOKAWA 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).
-
Patent number: 11280964Abstract: A fusion splicer for fusion-splicing a first group of optical fibers and a second group of optical fibers by arc discharge is disclosed. The fusion splicer includes first and second electrode rods, first and second fiber holding parts, and a first shield. The electrode rods generate the arc discharge therebetween. The first fiber holding part has a first plurality of V-grooves positioning the first group of optical fibers. The second fiber holding part has a second plurality of V-grooves positioning the second group of optical fibers. The first shield is located between the first and second plurality of V-grooves and the first electrode rod in a direction along a center line connecting a tip of the first electrode rod to a tip of the second electrode rod. The first shield is formed of an insulating material having heat resisting properties withstanding 1000 or more degrees Celsius.Type: GrantFiled: October 9, 2019Date of Patent: March 22, 2022Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Dai Sasaki, Takuro Watanabe, Sho Yakabe, Takako Hosokawa
-
Patent number: 10830958Abstract: An optical connector according to an embodiment includes: an optical fiber extending along a connecting direction; a front housing in a tubular shape including a first opening and a second opening; a ferrule configured to retain the optical fibers and having a light incidence-emission part optically connected to a corresponding connector; a pin keeper configured to retain a guide pin inserted into the ferrule; and a rear housing fixed with the second opening covered and configured to support the coil spring in the inside of the front housing. The rear housing has an insertion hole into which the optical fiber is insertable from a direction intersecting with the connecting direction.Type: GrantFiled: July 23, 2019Date of Patent: November 10, 2020Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takako Hosokawa, Takuro Watanabe
-
Patent number: 10795092Abstract: An optical connector having a shutter is disclosed. The optical connector comprises an optical connection component configured to hold one or a plurality of optical fibers, and having a light incidence/emission end surface being movable in the connection direction with respect to the optical connection component; a second member having a shutter part that performs opening/closing of an opening, the second member being attached to the first member in a state of being rotatable around a rotation axis; a first sealing member contacting the first member over a whole circumference of the opening, the first sealing member also contacting the shutter part over the whole circumference of the opening when the shutter part is in a closed state; and a linkage mechanism that rotates the second member in conjunction with movement of the first member along the connection direction with respect to the optical connection component.Type: GrantFiled: September 5, 2017Date of Patent: October 6, 2020Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takuro Watanabe, Dai Sasaki, Yoshikyo Tamekuni, Takako Hosokawa
-
Publication number: 20200142129Abstract: A fusion splicer for fusion-splicing a first group of optical fibers and a second group of optical fibers by arc discharge is disclosed. The fusion splicer includes first and second electrode rods, first and second fiber holding parts, and a first shield. The electrode rods generate the arc discharge therebetween. The first fiber holding part has a first plurality of V-grooves positioning the first group of optical fibers. The second fiber holding part has a second plurality of V-grooves positioning the second group of optical fibers. The first shield is located between the first and second plurality of V-grooves and the first electrode rod in a direction along a center line connecting a tip of the first electrode rod to a tip of the second electrode rod. The first shield is formed of an insulating material having heat resisting properties withstanding 1000 or more degrees Celsius.Type: ApplicationFiled: October 9, 2019Publication date: May 7, 2020Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Dai SASAKI, Takuro WATANABE, Sho YAKABE, Takako HOSOKAWA
-
Publication number: 20200049898Abstract: An optical connector according to an embodiment includes: an optical fiber extending along a connecting direction; a front housing in a tubular shape including a first opening and a second opening; a ferrule configured to retain the optical fibers and having a light incidence-emission part optically connected to a corresponding connector; a pin keeper configured to retain a guide pin inserted into the ferrule; and a rear housing fixed with the second opening covered and configured to support the coil spring in the inside of the front housing. The rear housing has an insertion hole into which the optical fiber is insertable from a direction intersecting with the connecting direction.Type: ApplicationFiled: July 23, 2019Publication date: February 13, 2020Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takako Hosokawa, Takuro Watanabe
-
Patent number: 10444439Abstract: An optical connector is disclosed. The optical connector includes an optical fiber, a ferrule that holds the optical fiber, the ferrule having a flat ferrule end surface facing a counterpart optical connector, and a spacer provided on the ferrule end surface so as to define a clearance between the ferrule end surface and the counterpart optical connector. A tip surface of the optical fiber is exposed at the ferrule end surface. Respective normal directions to the tip surface of the optical fiber and the ferrule end surface are inclined with respect to an optical-axis direction of the optical fiber in a section along an optical axis of the optical fiber. The spacer includes an opening configured to allow an optical path extending from the tip surface of the optical fiber to pass therethrough.Type: GrantFiled: October 18, 2016Date of Patent: October 15, 2019Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hajime Arao, Tomomi Sano, Osamu Shimakawa, Masakazu Fukuda, Takako Hosokawa
-
Publication number: 20190187385Abstract: An optical connector having a shutter is disclosed. The optical connector comprises an optical connection component configured to hold one or a plurality of optical fibers, and having a light incidence/emission end surface being movable in the connection direction with respect to the optical connection component; a second member having a shutter part that performs opening/closing of an opening, the second member being attached to the first member in a state of being rotatable around a rotation axis; a first sealing member contacting the first member over a whole circumference of the opening, the first sealing member also contacting the shutter part over the whole circumference of the opening when the shutter part is in a closed state; and a linkage mechanism that rotates the second member in conjunction with movement of the first member along the connection direction with respect to the optical connection component.Type: ApplicationFiled: September 5, 2017Publication date: June 20, 2019Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takuro WATANABE, Dai SASAKI, Yoshikyo TAMEKUNI, Takako HOSOKAWA
-
Publication number: 20190101701Abstract: An optical connector ferrule, an optical connector, and an optical coupling structure according to an embodiment includes an optical connector ferrule that includes a ferrule end face that faces a counterpart connector; and an optical fiber holding hole that is open to the ferrule end face and holds an optical fiber inserted thereinto. A normal direction of the ferrule end face is inclined with respect to a direction of an optical axis of the optical fiber in a section along the optical axis of the optical fiber inserted into and held in the optical fiber holding hole. An inclined angle (?) of the normal direction with respect to the direction of the optical axis is between 100 and 20°.Type: ApplicationFiled: March 9, 2017Publication date: April 4, 2019Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Sho YAKABE, Osamu SHIMAKAWA, Tomomi SANO, Takako HOSOKAWA, Takuro WATANABE
-
Publication number: 20190072725Abstract: An optical connector ferrule according to an embodiment includes: holding holes into which optical waveguiding members, each of which has a GRIN lens, an optical fiber, and a fusion part that connects the GRIN lens and the optical fiber, are inserted; a ferrule end face at which the holding holes open and which faces a counterpart connector; and stepped parts with which the fusion parts of the optical waveguiding members inserted into the holding holes are aligned.Type: ApplicationFiled: March 8, 2017Publication date: March 7, 2019Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takuro WATANABE, Osamu SHIMAKAWA, Sho YAKABE, Takako HOSOKAWA
-
Publication number: 20190041586Abstract: An optical connector-equipped fiber (2A, 2B) has optical fibers (10a), a ferrule (11), guide holes, and a structure for regulating a space between end faces (11a) of the ferrules (11). A relative position between the end faces (11a) is fixed by guide pins being inserted into the guide holes. Normals with respect to leading end faces of the optical fibers are inclined with respect to optical axes of the optical fibers. MFDs of the optical fibers are gradually expanded toward the leading end faces and are maximized at the leading end faces. The optical axes of the pair of facing optical fibers that are optically coupled are not present on the same optical axis.Type: ApplicationFiled: November 11, 2016Publication date: February 7, 2019Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takako HOSOKAWA, Sho YAKABE, Osamu SHIMAKAWA, Tomomi SANO
-
Publication number: 20180321446Abstract: An optical connector is disclosed. The optical connector includes an optical fiber, a ferrule that holds the optical fiber, the ferrule having a flat ferrule end surface facing a counterpart optical connector, and a spacer provided on the ferrule end surface so as to define a clearance between the ferrule end surface and the counterpart optical connector. A tip surface of the optical fiber is exposed at the ferrule end surface. Respective normal directions to the tip surface of the optical fiber and the ferrule end surface are inclined with respect to an optical-axis direction of the optical fiber in a section along an optical axis of the optical fiber. The spacer includes an opening configured to allow an optical path extending from the tip surface of the optical fiber to pass therethrough.Type: ApplicationFiled: October 18, 2016Publication date: November 8, 2018Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hajime ARAO, Tomomi SANO, Osamu SHIMAKAWA, Masakazu FUKUDA, Takako HOSOKAWA
-
Patent number: D881814Type: GrantFiled: January 22, 2018Date of Patent: April 21, 2020Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takuro Watanabe, Dai Sasaki, Yoshikyo Tamekuni, Takako Hosokawa
-
Patent number: D908088Type: GrantFiled: January 22, 2018Date of Patent: January 19, 2021Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takuro Watanabe, Dai Sasaki, Yoshikyo Tamekuni, Takako Hosokawa