Patents by Inventor Masahiro Okuma
Masahiro Okuma 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: 11835020Abstract: A nozzle body has an injection hole configured to inject fuel and a fuel passage connecting to the injection hole. A needle is configured to open and close the fuel passage to switch between fuel injection from the injection hole and stop of the fuel injection. An injection hole axis is an imaginary line extending along a center of the injection hole. An injection hole perpendicular cross section is a cross section of the injection hole perpendicular to the injection hole axis. The injection hole perpendicular cross section has a flat shape. The injection hole perpendicular cross section has an area that gradually expands from an inlet of the injection hole to an outlet of the injection hole while maintaining a similar shape.Type: GrantFiled: January 6, 2021Date of Patent: December 5, 2023Assignee: DENSO CORPORATIONInventors: Masayuki Niwa, Yosuke Nakagawa, Masahiro Okuma, Noritsugu Kato, Hiroki Kaneta
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Publication number: 20210123403Abstract: A nozzle body has an injection hole configured to inject fuel and a fuel passage connecting to the injection hole. A needle is configured to open and close the fuel passage to switch between fuel injection from the injection hole and stop of the fuel injection. An injection hole axis is an imaginary line extending along a center of the injection hole. An injection hole perpendicular cross section is a cross section of the injection hole perpendicular to the injection hole axis. The injection hole perpendicular cross section has a flat shape. The injection hole perpendicular cross section has an area that gradually expands from an inlet of the injection hole to an outlet of the injection hole while maintaining a similar shape.Type: ApplicationFiled: January 6, 2021Publication date: April 29, 2021Inventors: Masayuki NIWA, Yosuke NAKAGAWA, Masahiro OKUMA, Noritsugu KATO, Hiroki KANETA
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Patent number: 9194495Abstract: A fluid pressure apparatus includes a piston, and a packing provided on an outer circumference of the piston. The packing includes a support ring made of a low-friction material, and a ring-shaped seal member mounted to the support ring. When at least a certain amount of transverse load acts on the piston, an outer circumferential surface of the support ring abuts against an inner circumferential surface of the slide hole, whereby the piston is prevented from contacting with the inner circumferential surface of the slide hole.Type: GrantFiled: May 13, 2011Date of Patent: November 24, 2015Assignee: SMC KABUSHIKI KAISHAInventors: Masahiro Okuma, Yasunaga Suzuki
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Patent number: 9127771Abstract: In a fluid pressure apparatus, a packing is constituted from an annular seal member made of an elastic rubber material, and support rings made of a material possessing low friction, which are mounted on an outer circumference of the seal member. The seal member includes, on an outer circumference thereof, a sealing projection, shoulder portions formed on both sides of the sealing projection, and concave grooves interposed between the shoulder portions and the sealing projection. The support rings include support surfaces on outer circumferences thereof, and engagement projections on inner circumferences thereof, such that by engagement of the projections in the concave grooves, the support rings are mounted on the seal member so as to surround outer circumferences of the shoulder portions.Type: GrantFiled: May 13, 2011Date of Patent: September 8, 2015Assignee: SMC KABUSHIKI KAISHAInventors: Masahiro Okuma, Yasunaga Suzuki
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Patent number: 8739684Abstract: In a fluid pressure apparatus, a packing includes an annular seal member made of an elastic material, and support rings made of a low-friction material, which are mounted on an outer circumference of the seal member. The seal member includes, on an outer circumference thereof, a sealing projection that contacts an inner surface of the slide hole. The support rings are disposed on both sides of the sealing projection, and protrude beyond the seal member in the axial direction. Outer circumferential surfaces of the support rings always contact the inner circumferential surface of the slide hole. When a transverse load does not act on a piston as a partitioning member, the inner circumferential surfaces of the support rings do not contact the outer circumference of the piston. When a transverse load acts on the piston, the inner circumferential surfaces of the support rings contact the outer circumference of the piston.Type: GrantFiled: May 13, 2011Date of Patent: June 3, 2014Assignee: SMC Kabushiki KaishaInventors: Masahiro Okuma, Yasunaga Suzuki
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Publication number: 20110285095Abstract: In a fluid pressure apparatus, a packing is constituted from an annular seal member made of an elastic rubber material, and support rings made of a material possessing low friction, which are mounted on an outer circumference of the seal member. The seal member includes, on an outer circumference thereof, a sealing projection, shoulder portions formed on both sides of the sealing projection, and concave grooves interposed between the shoulder portions and the sealing projection. The support rings include support surfaces on outer circumferences thereof, and engagement projections on inner circumferences thereof, such that by engagement of the projections in the concave grooves, the support rings are mounted on the seal member so as to surround outer circumferences of the shoulder portions.Type: ApplicationFiled: May 13, 2011Publication date: November 24, 2011Applicant: SMC Kabushiki KaishaInventors: Masahiro OKUMA, Yasunaga Suzuki
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Publication number: 20110283883Abstract: A fluid pressure apparatus includes a piston, and a packing provided on an outer circumference of the piston. The packing includes a support ring made of a low-friction material, and a ring-shaped seal member mounted to the support ring. When at least a certain amount of transverse load acts on the piston, an outer circumferential surface of the support ring abuts against an inner circumferential surface of the slide hole, whereby the piston is prevented from contacting with the inner circumferential surface of the slide hole.Type: ApplicationFiled: May 13, 2011Publication date: November 24, 2011Applicant: SMC Kabushiki KaishaInventors: Masahiro Okuma, Yasunaga Suzuki
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Publication number: 20110283880Abstract: In a fluid pressure apparatus, a packing includes an annular seal member made of an elastic material, and support rings made of a low-friction material, which are mounted on an outer circumference of the seal member. The seal member includes, on an outer circumference thereof, a sealing projection that contacts an inner surface of the slide hole. The support rings are disposed on both sides of the sealing projection, and protrude beyond the seal member in the axial direction. Outer circumferential surfaces of the support rings always contact the inner circumferential surface of the slide hole. When a transverse load does not act on a piston as a partitioning member, the inner circumferential surfaces of the support rings do not contact the outer circumference of the piston. When a transverse load acts on the piston, the inner circumferential surfaces of the support rings contact the outer circumference of the piston.Type: ApplicationFiled: May 13, 2011Publication date: November 24, 2011Applicant: SMC Kabushiki KaishaInventors: Masahiro OKUMA, Yasunaga Suzuki
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Patent number: 3994366Abstract: A novel slip down way embarking device used in an emergency of a ship or other constructions to transfer the passengers to a life raft or other life saving apparatus in safe and rapid manner, said device comprising a tubular slip down chute made of vertical elongated cloth, a zigzag passage formed within said chute, a slip way attached to the lowermost end of said zigzag passage, a floating platform positioned under said chute and slip way to receiver the slipped down persons thereon, and a container to store the above embarking members and throw them down in an emergency without trouble and difficulty.Type: GrantFiled: November 1, 1974Date of Patent: November 30, 1976Assignee: Fujikura Rubber Works LimitedInventors: Masahiro Okuma, Mutuo Sato, Matuo Narita, Toshio Sugimoto, Masahumi Isihara, Hisanao Yagi
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Patent number: D634604Type: GrantFiled: January 25, 2010Date of Patent: March 22, 2011Assignee: SMC CorporationInventors: Syun Orihara, Masahiro Okuma
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Patent number: D422075Type: GrantFiled: March 16, 1998Date of Patent: March 28, 2000Assignee: SMC Kabushiki KaishaInventors: Kouichi Hakuta, Masahiro Okuma
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Patent number: D433120Type: GrantFiled: March 16, 1998Date of Patent: October 31, 2000Assignee: SMC Kabushiki KaishaInventors: Kouichi Hakuta, Masahiro Okuma