Patents by Inventor Kouhei Tomita
Kouhei Tomita 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: 11892055Abstract: Provided is a shock absorber capable of improving the dimensional quality and ensuring the sealing performance of a seal ring. The shock absorber includes a cylinder, an outer tube, an intermediate tube, and a discharge passage defined between the intermediate tube and the cylinder, a reservoir defined between the intermediate tube and the outer tube. The intermediate tube includes, on its inner circumferential surface, a groove having a concave shape in cross section to be capable of accommodating a seal ring that closes the discharge passage. A relationship of ?1<?2 is satisfied, where ?1 represents an angle formed between one side surface, out of both side surfaces of the groove of the intermediate tube, that is located on an axial end side of the intermediate tube, and a plane orthogonal to an axial direction of the intermediate tube, and ?2 represents an angle formed between the other side surface that is located on an axial center side of the intermediate tube and the plane.Type: GrantFiled: August 1, 2019Date of Patent: February 6, 2024Assignee: KYB CORPORATIONInventors: Tomomi Hayase, Tetsuo Arahata, Seiji Iwahara, Kouhei Tomita
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Publication number: 20210317892Abstract: Provided is a shock absorber capable of improving the dimensional quality and ensuring the sealing performance of a seal ring. The shock absorber includes a cylinder, an outer tube, an intermediate tube, and a discharge passage defined between the intermediate tube and the cylinder, a reservoir defined between the intermediate tube and the outer tube. The intermediate tube includes, on its inner circumferential surface, a groove having a concave shape in cross section to be capable of accommodating a seal ring that closes the discharge passage. A relationship of ?1<?2 is satisfied, where ?1 represents an angle formed between one side surface, out of both side surfaces of the groove of the intermediate tube, that is located on an axial end side of the intermediate tube, and a plane orthogonal to an axial direction of the intermediate tube, and ?2 represents an angle formed between the other side surface that is located on an axial center side of the intermediate tube and the plane.Type: ApplicationFiled: August 1, 2019Publication date: October 14, 2021Inventors: Tomomi HAYASE, Tetsuo ARAHATA, Seiji lWAHARA, Kouhei TOMITA
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Patent number: 9057285Abstract: There is proposed a lubricant system having a plurality of motor-driven pumps operating in parallel as main oil pumps, wherein even if at least one of the main oil pumps stops, the other normally operating main oil pumps do not stop due to overload of a motor. A lubricant system 7 comprises a hydraulic pressure piping 9, a plurality of lubricant pumps 10 arranged in parallel, a plurality of AC motors 11 driving each of the lubricant pumps 10, an error detector 24 detecting a presence or absence of an error in an operating state of each of the AC motors 11, a pressure loss addition unit 25 configured to increase pressure loss in the hydraulic pressure piping 9, and a controller 26 causing the pressure loss addition unit 25 to increase pressure loss when the error detector 24 detects an error in at least one of the AC motors 11.Type: GrantFiled: February 18, 2010Date of Patent: June 16, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Kouhei Tomita, Toshihiko Endo
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Publication number: 20110305585Abstract: There is proposed a lubricant system having a plurality of motor-driven pumps operating in parallel as main oil pumps, wherein even if at least one of the main oil pumps stops, the other normally operating main oil pumps do not stop due to overload of a motor. A lubricant system 7 comprises a hydraulic pressure piping 9, a plurality of lubricant pumps 10 arranged in parallel, a plurality of AC motors 11 driving each of the lubricant pumps 10, an error detector 24 detecting a presence or absence of an error in an operating state of each of the AC motors 11, a pressure loss addition unit 25 configured to increase pressure loss in the hydraulic pressure piping 9, and a controller 26 causing the pressure loss addition unit 25 to increase pressure loss when the error detector 24 detects an error in at least one of the AC motors 11.Type: ApplicationFiled: February 18, 2010Publication date: December 15, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Kouhei Tomita, Toshihiko Endo
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Patent number: 7597511Abstract: In a surface-coated cutting tool, (a) a Ti compound layer as a lower layer and (b) an ?-type Al2O3 layer as an upper layer having a crystal grain structure of an even polygonal shape (including an even hexagonal shape) and an elongate shape and containing Zr are deposited on the surface of a tool substrate. In the surface-coated cutting tool, the above mentioned crystal grains of which insides are divided by at least one crystal lattice interface with the constituent atom covalent lattice point type expressed by ?3 occupying 60% or more as an area ratio in the crystal grains of the upper layer.Type: GrantFiled: December 24, 2008Date of Patent: October 6, 2009Assignee: Mitsubishi Materials CorporationInventors: Kouhei Tomita, Michiyasu Nishiyama, Akira Osada, Eiji Nakamura
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Publication number: 20090170415Abstract: In a surface-coated cutting tool, (a) a Ti compound layer as a lower layer and (b) an ?-type Al2O3 layer as an upper layer having a crystal grain structure of an even polygonal shape (including an even hexagonal shape) and an elongate shape and containing Zr are deposited on the surface of a tool substrate. In the surface-coated cutting tool, the above mentioned crystal grains of which insides are divided by at least one crystal lattice interface with the constituent atom covalent lattice point type expressed by ?3 occupying 60% or more as an area ratio in the crystal grains of the upper layer.Type: ApplicationFiled: December 24, 2008Publication date: July 2, 2009Applicant: Mitsubishi Materials CorporationInventors: Kouhei Tomita, Michiyasu Nishiyama, Akira Osada, Eiji Nakamura
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Patent number: 7001864Abstract: A catalyst composition for production of a polyurethane resin, which comprises a metal complex catalyst represented by the following formula (1): M(acac)n??(1) wherein M represents Mn, Fe, Co, Ni, Cu, Zn, Zr, Ti, Hf, Al or Th, acac represents acetylacetonate, and n is an integer of from 1 to 4, and at least one compound selected from the group consisting of a bicyclic tertiary amine compound represented by the following formula (2): wherein n is an integer of from 1 to 3, a compound having a cumulative double bond, and a quaternary ammonium salt compound.Type: GrantFiled: March 17, 2004Date of Patent: February 21, 2006Assignee: Tosoh CorporationInventors: Hiroyuki Kiso, Hiroyuki Yoshimura, Shinichi Inoue, Kouhei Tomita
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Publication number: 20040192875Abstract: A catalyst composition for production of a polyurethane resin, which comprises a metal complex catalyst represented by the following formula (1):Type: ApplicationFiled: March 17, 2004Publication date: September 30, 2004Applicant: Tosoh CorporationInventors: Hiroyuki Kiso, Hiroyuki Yoshimura, Shinichi Inoue, Kouhei Tomita
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Publication number: 20020195576Abstract: A signal processor for an optical sensor device has a connector which is electrically connectable to both a displacement detector and a transmission detector but not at the same time. The displacement detector emits light and outputs a pair of detection signals based on the quantity of light reflected from a specified area and the transmission detector emits light and outputs a single detection signal based on the quantity of the emitted light transmitted through a specified area. The signal processor has a control unit which selectively carries out a measurement process or another measurement process, depending on which of the detectors is connected through the connector.Type: ApplicationFiled: June 13, 2002Publication date: December 26, 2002Inventors: Yuichi Inoue, Kouhei Tomita, Hiroyuki Inoue
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Patent number: 6152251Abstract: A power assist bicycle includes a front wheel and a rear wheel, a bicycle body frame supporting the front and rear wheels to be rotatable, a saddle mounted to the bicycle body frame on which a rider rides, and a pair of pedals which are operatively connected to each other through a crank shaft, and the bicycle body frame includes a head pipe supporting the front wheel, a main pipe extending obliquely downward in a rearward direction from the head pipe, and a saddle pipe supporting the saddle at an upper end portion thereof in a standing attitude of the bicycle.Type: GrantFiled: October 20, 1998Date of Patent: November 28, 2000Assignee: Suzuki Kabushiki KaishaInventors: Hisao Nagai, Kouhei Tomita, Shinobu Tsutsumikoshi, Kosaku Yamauchi
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Patent number: 5615181Abstract: An optical read/write head for a magnetic-optic recording and reproducing unit having a beam splitter placed between a collimator lens and an objective lens. The optical path of the beam reflected by a recording disk is bent by the beam splitter and the beam strikes a polarizing beam splitter. The polarizing beam splitter splits the reflected beam into P and S polarized components whose optical axes form n angel of less than 90.degree.. The rays of the P and S polarized components strike respective light detecting elements and which are co-arranged on substantially the same surface.Type: GrantFiled: June 22, 1995Date of Patent: March 25, 1997Assignee: Omron CorporationInventors: Hayami Hosokawa, Tatsuo Ohgaki, Kouhei Tomita, Hironobu Kiyomoto, Naru Yasuda, Shinya Otsuki
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Patent number: 5444677Abstract: An optical read/write head for a magnetic-optic recording and reproducing unit having a beam splitter placed between a collimator lens and an objective lens. The optical path of the beam reflected by a recording disk is bent by the beam splitter and the beam strikes a polarizing beam splitter. The polarizing beam splitter splits the reflected beam into P and S polarized components whose optical axes form n angel of less than 90.degree.. The rays of the P and S polarized components strike respective light detecting elements and which are co-arranged on substantially the same surface.Type: GrantFiled: March 3, 1993Date of Patent: August 22, 1995Assignee: Omron CorporationInventors: Hayami Hosokawa, Tatsuo Ohgaki, Kouhei Tomita, Hironobu Kiyomoto, Naru Yasuda, Shinya Otsuki
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Patent number: 5040873Abstract: An optical device is fitted into a casing (2) in a state in which a pair of lenses (6, 8) have the same optic axis (Ra). The casing (2) includes two identically shaped casing halves (1A, 1B), with the pair of lenses (6, 8) being embraced and held by the two casing halves in a state in which a gap (S) is left between the surfaces of the two casing halves.Type: GrantFiled: January 2, 1991Date of Patent: August 20, 1991Assignee: Omron CorporationInventors: Yoshihiro Takamatsu, Kouhei Tomita, Junichi Takagi
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Patent number: D987688Type: GrantFiled: September 8, 2021Date of Patent: May 30, 2023Assignee: SMC CORPORATIONInventor: Kouhei Tomita