Patents by Inventor Takashi Teraoka
Takashi Teraoka 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: 11286707Abstract: An opening and closing system includes a first human detection sensor configured to detect a vehicle user who enters a first area defined on a periphery of a vehicle body, a lamp visible by the vehicle user who enters the first area, and a control device configured to control an unlocking operation of the lock device, a closing operation of the striker device, a pop-up operation of the striker device, and switching on and off of the lamp. The control device switches on the lamp when the vehicle user is detected by the first human detection sensor and starts the controlling of the unlocking operation of the lock device and the closing operation and the pop-up operation of the striker device in response to the lamp being switched on.Type: GrantFiled: August 2, 2019Date of Patent: March 29, 2022Assignees: MITSUI KINZOKU ACT CORPORATION, GECOM CORPORATIONInventors: Michio Ohashi, Satoru Nishizawa, Takashi Teraoka
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Publication number: 20200040638Abstract: An opening and closing system includes a first human detection sensor configured to detect a vehicle user who enters a first area defined on a periphery of a vehicle body, a lamp visible by the vehicle user who enters the first area, and a control device configured to control an unlocking operation of the lock device, a closing operation of the striker device, a pop-up operation of the striker device, and switching on and off of the lamp. The control device switches on the lamp when the vehicle user is detected by the first human detection sensor and starts the controlling of the unlocking operation of the lock device and the closing operation and the pop-up operation of the striker device in response to the lamp being switched on.Type: ApplicationFiled: August 2, 2019Publication date: February 6, 2020Applicants: MITSUI KINZOKU ACT CORPORATION, GECOM CORPORATIONInventors: Michio OHASHI, Satoru NISHIZAWA, Takashi TERAOKA
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Publication number: 20190120319Abstract: A shock absorber includes a housing that includes an annular nut portion threaded to an outer circumference of a front end portion of a piston rod, an annular flange portion protruding outward from the nut portion, and a tubular portion extending from an outer circumference of the flange portion in a direction away from the piston rod, a tube that is inserted into the housing, and an elastic member that is attached to an inner circumference of the tube to define a first chamber communicating with an extension side chamber and a second chamber communicating with a compression side chamber inside the housing and the tube is fixed while being sandwiched between the flange portion and a bent portion corresponding to a support portion formed by caulking a front end of the tubular portion inward.Type: ApplicationFiled: April 5, 2017Publication date: April 25, 2019Applicant: KYB CORPORATIONInventors: Kazutaka INAMITSU, Takashi TERAOKA
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Publication number: 20190107170Abstract: A shock absorber includes: a cylinder; a piston that is movably inserted into the cylinder and defines an extension side chamber and a compression side chamber inside the cylinder; an extension side damping passage and a compression side damping passage that communicate the extension side chamber with the compression side chamber; a pressure chamber that communicates with the extension side chamber and the compression side chamber; and an elastic member that defines a first chamber communicating with the extension side chamber and a second chamber communicating with the compression side chamber inside the pressure chamber.Type: ApplicationFiled: April 5, 2017Publication date: April 11, 2019Applicant: KYB CORPORATIONInventors: Kazutaka INAMITSU, Takashi TERAOKA
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Patent number: 9970505Abstract: Shock absorber including a suction passage allowing flow only from a reservoir towards a pressure side chamber, a rectifying passage allowing flow only from the pressure side chamber towards an expansion side chamber, and a damping force variable valve allowing flow only from the expansion side chamber towards the reservoir. A large pressure-side pressure chamber communicating with the pressure side chamber, and an outer peripheral expansion-side pressure chamber communicating with the expansion side chamber sandwich a free piston slidably moving within a bottom housing forming a pressure chamber. Because a pressure-side pressure-receiving area of the free piston is larger than an expansion-side pressure-receiving area in a contraction operation in which a piston moves downward, the free piston can move downward even in a uniflow-type shock absorber in which pressure in the expansion side and pressure side chambers become equal whereby damping force can be reduced during an input of high-frequency vibration.Type: GrantFiled: March 20, 2014Date of Patent: May 15, 2018Assignee: KYB CorporationInventors: Takashi Teraoka, Tatsuya Masamura
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Patent number: 9840123Abstract: A shock absorber includes a suction passage permitting flow only from a reservoir toward a compression-side chamber, a rectification passage permitting flow only from the compression-side chamber toward an extension-side chamber, and a variable valve permitting flow only from the extension-side chamber toward the reservoir. A large chamber as a compression-side pressure chamber communicating with the compression-side chamber and an outer periphery chamber as an extension-side pressure chamber communicating with the extension-side chamber are partitioned in the shock absorber by a free piston that moves slidably within a bottom member serving as a housing. A compression-side pressure-receiving area of the free piston is larger than an extension-side pressure-receiving area.Type: GrantFiled: March 20, 2014Date of Patent: December 12, 2017Assignee: KYB CorporationInventors: Takashi Teraoka, Tatsuya Masamura
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Patent number: 9834054Abstract: A shock absorber includes; a free piston that partitions the compression chamber into an expansion-side compression chamber and a contraction-side compression chamber; an expansion-side flow passage that connects the expansion-side chamber with the expansion-side compression chamber; a contraction-side flow passage that connects the contraction-side chamber with the contraction-side compression chamber; an expansion-side bypass valve provided in the expansion-side flow passage to admit only a flow directed from the expansion-side chamber to the expansion-side compression chamber and generate resistance; a contraction-side bypass valve provided in parallel with the expansion-side bypass valve to admit only a flow directed from the expansion-side compression chamber to the expansion-side chamber and generate resistance; an expansion-side elastic stopper configured to stop the free piston at an expansion-side stroke end; and a contraction-side elastic stopper configured to stop the free piston at a contraction-sType: GrantFiled: September 18, 2014Date of Patent: December 5, 2017Assignee: KYB CorporationInventors: Takashi Teraoka, Kazutaka Inamitsu, Tatsuya Masamura
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Patent number: 9797465Abstract: A piston of a magnetorheological fluid shock absorber is provided with a piston core having a small diameter portion mounted on an end portion of the piston rod, an enlarged diameter portion formed continuously in an axial direction with a diameter larger than the small diameter portion and forming a stepped portion, and a large diameter portion formed continuously in the axial direction with a diameter larger than the enlarged diameter portion and having a coil; a ring body surrounding the outer periphery of the piston core and forming a flow passage of the magnetorheological fluid between itself and the large diameter portion; a plate formed annularly and arranged on the outer periphery of the small diameter portion and mounted on one end of the ring body; and a stopper mounted on the small diameter portion and sandwiching the plate between the stopper and the stepped portion.Type: GrantFiled: March 10, 2014Date of Patent: October 24, 2017Assignee: KYB CorporationInventors: Keiji Saito, Kazuhisa Nakamura, Takashi Teraoka
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Patent number: 9776468Abstract: A shock absorber includes at least one of an expansion-side sensitive unit and a contraction-side sensitive unit. The expansion-side sensitive unit has an expansion-side actuating chamber that communicates with an expansion-side chamber and a contraction-side chamber, an expansion-side free piston that partitions the expansion-side actuating chamber into a first expansion-side pressure chamber and a second expansion-side pressure chamber, and an expansion-side spring element configured to bias the expansion-side free piston to compress the first expansion-side pressure chamber.Type: GrantFiled: September 19, 2014Date of Patent: October 3, 2017Assignee: KYB CorporationInventors: Takashi Teraoka, Tatsuya Masamura
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Patent number: 9476477Abstract: A shock absorber includes a cylinder, a piston, a piston rod, a damping passage, a bypass path, a shutter, a biasing member, and a control spring secured to the cylinder by one end. Another end of the control spring is opposed to the shutter. When the piston exceeds a predetermined position with respect to the cylinder by displacing on the compression-side chamber side, the shutter is pushed by the control spring and closes the bypass path. The control spring is a conical coil spring. The other end side of the control spring has a small diameter. A guide ring, which is slidably in contact with an inner periphery of the cylinder, is mounted to the small-diameter side end of the control spring.Type: GrantFiled: December 18, 2013Date of Patent: October 25, 2016Assignee: KYB CorporationInventor: Takashi Teraoka
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Publication number: 20160288604Abstract: A shock absorber includes; a free piston that partitions the compression chamber into an expansion-side compression chamber and a contraction-side compression chamber; an expansion-side flow passage that connects the expansion-side chamber with the expansion-side compression chamber; a contraction-side flow passage that connects the contraction-side chamber with the contraction-side compression chamber; an expansion-side bypass valve provided in the expansion-side flow passage to admit only a flow directed from the expansion-side chamber to the expansion-side compression chamber and generate resistance; a contraction-side bypass valve provided in parallel with the expansion-side bypass valve to admit only a flow directed from the expansion-side compression chamber to the expansion-side chamber and generate resistance; an expansion-side elastic stopper configured to stop the free piston at an expansion-side stroke end; and a contraction-side elastic stopper configured to stop the free piston at a contraction-sType: ApplicationFiled: September 18, 2014Publication date: October 6, 2016Applicant: KYB CorporationInventors: Takashi TERAOKA, Kazutaka INAMITSU, Tatsuya MASAMURA
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Publication number: 20160288605Abstract: A shock absorber includes a suction passage permitting flow only from a reservoir toward a compression-side chamber, a rectification passage permitting flow only from the compression-side chamber toward an extension-side chamber, and a variable valve permitting flow only from the extension-side chamber toward the reservoir. A large chamber as a compression-side pressure chamber communicating with the compression-side chamber and an outer periphery chamber as an extension-side pressure chamber communicating with the extension-side chamber are partitioned in the shock absorber by a free piston that moves slidably within a bottom member serving as a housing. A compression-side pressure-receiving area of the free piston is larger than an extension-side pressure-receiving area.Type: ApplicationFiled: March 20, 2014Publication date: October 6, 2016Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Takashi TERAOKA, Tatsuya MASAMURA
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Publication number: 20160281815Abstract: Shock absorber including a suction passage allowing flow only from a reservoir towards a pressure side chamber, a rectifying passage allowing flow only from the pressure side chamber towards an expansion side chamber, and a damping force variable valve allowing flow only from the expansion side chamber towards the reservoir. A large pressure-side pressure chamber communicating with the pressure side chamber, and an outer peripheral expansion-side pressure chamber communicating with the expansion side chamber sandwich a free piston slidably moving within a bottom housing forming a pressure chamber. Because a pressure-side pressure-receiving area of the free piston is larger than an expansion-side pressure-receiving area in a contraction operation in which a piston moves downward, the free piston can move downward even in a uniflow-type shock absorber in which pressure in the expansion side and pressure side chambers become equal whereby damping force can be reduced during an input of high-frequency vibration.Type: ApplicationFiled: March 20, 2014Publication date: September 29, 2016Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Takashi TERAOKA, Tatsuya MASAMURA
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Publication number: 20160273606Abstract: A piston of a magnetorheological fluid shock absorber is provided with a piston core having a small diameter portion mounted on an end portion of the piston rod, an enlarged diameter portion formed continuously in an axial direction with a diameter larger than the small diameter portion and forming a stepped portion, and a large diameter portion formed continuously in the axial direction with a diameter larger than the enlarged diameter portion and having a coil; a ring body surrounding the outer periphery of the piston core and forming a flow passage of the magnetorheological fluid between itself and the large diameter portion; a plate formed annularly and arranged on the outer periphery of the small diameter portion and mounted on one end of the ring body; and a stopper mounted on the small diameter portion and sandwiching the plate between the stopper and the stepped portion.Type: ApplicationFiled: March 10, 2014Publication date: September 22, 2016Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Keiji SAITO, Kazuhisa NAKAMURA, Takashi TERAOKA
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Publication number: 20160263960Abstract: A shock absorber includes a cylinder, a piston that partitions the cylinder into an expansion-side chamber and a contraction-side chamber, a piston rod connected to the piston, a damping passage that allows the expansion-side chamber to communicate with the contraction-side chamber, a pressure chamber that communicates with the expansion-side chamber and the contraction-side chamber, a free piston that partitions the pressure chamber into an expansion-side pressure chamber and a contraction-side pressure chamber, a spring element configured to position the free piston in a neutral position with respect to the pressure chamber and exert a biasing force for suppressing a displacement of the free piston from the neutral position, and a damping force control unit provided in the damping passage, the damping force control unit being configured to change resistance to a flow of the hydraulic fluid passing therethrough.Type: ApplicationFiled: November 5, 2014Publication date: September 15, 2016Applicant: KYB CorporationInventors: Takashi TERAOKA, Tatsuya MASAMURA
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Patent number: 9435394Abstract: A damping device comprises a piston that partitions an interior of a cylinder into first and second working chambers. A flow-rate-dependent damping force generating element connects the first and second working chambers. A first pressure chamber and a second pressure chamber divided by a free piston are formed integrally with the piston. A first connecting passage connects the first working chamber and the first pressure chamber, and a second connecting passage connects the second working chamber and the second pressure chamber. By providing a relief valve that allows fluid to flow from the first working chamber into the second working chamber, an increase in the generated damping force during a high speed operation of the piston can be suppressed, regardless of a vibration frequency of the piston.Type: GrantFiled: December 9, 2010Date of Patent: September 6, 2016Assignee: KYB CorporationInventors: Takashi Teraoka, Kazutaka Inamitsu
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Patent number: 9428030Abstract: A shock absorber includes a suction passage allowing flow only from a reservoir towards a pressure side chamber, a rectifying passage allowing flow only from the pressure side chamber towards an expansion side chamber, and a damping force variable valve allowing flow only from the expansion side chamber towards the reservoir. Large, and small and outer peripheral chambers in a bottom housing sandwich a free piston. The small chamber communicates the outer peripheral chamber with the expansion side chamber. The large chamber communicates with the pressure side chamber through first and second valves. During a contraction in which a piston moves downward, even in a uniflow-type shock absorber in which pressure in the expansion side chamber and the pressure side chamber become equal, the free piston can move downward due to a difference in pressure-receiving areas. Even if a stretching speed reaches a high range, the first and second valves are opened, and damping force is reduced.Type: GrantFiled: March 20, 2014Date of Patent: August 30, 2016Assignee: KYB CorporationInventors: Takashi Teraoka, Tatsuya Masamura
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Publication number: 20160229254Abstract: A shock absorber includes at least one of an expansion-side sensitive unit and a contraction-side sensitive unit. The expansion-side sensitive unit has an expansion-side actuating chamber that communicates with an expansion-side chamber and a contraction-side chamber, and an expansion-side free piston that partitions the expansion-side actuating chamber into a first expansion-side pressure chamber and a second expansion-side pressure chamber. The contraction-side sensitive unit has a contraction-side actuating chamber that communicates with a contraction-side chamber and a reservoir, and a contraction-side free piston that partitions the contraction-side actuating chamber into a first contraction-side pressure chamber and a second contraction-side pressure chamber.Type: ApplicationFiled: September 18, 2014Publication date: August 11, 2016Applicant: KYB CorporationInventors: Takashi TERAOKA, Tatsuya MASAMURA
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Publication number: 20160229255Abstract: A shock absorber includes at least one of an expansion-side sensitive unit and a contraction-side sensitive unit. The expansion-side sensitive unit has an expansion-side actuating chamber that communicates with an expansion-side chamber and a contraction-side chamber, an expansion-side free piston that partitions the expansion-side actuating chamber into a first expansion-side pressure chamber and a second expansion-side pressure chamber, and an expansion-side spring element configured to bias the expansion-side free piston to compress the first expansion-side pressure chamber.Type: ApplicationFiled: September 19, 2014Publication date: August 11, 2016Applicant: KYB CorporationInventors: Takashi TERAOKA, Tatsuya MASAMURA
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Publication number: 20160195153Abstract: A shock absorber includes a cylinder, a piston, a piston rod, a damping passage, a bypass path, a shutter, a biasing member, and a control spring secured to the cylinder by one end. Another end of the control spring is opposed to the shutter. When the piston exceeds a predetermined position with respect to the cylinder by displacing on the compression-side chamber side, the shutter is pushed by the control spring and closes the bypass path. The control spring is a conical coil spring. The other end side of the control spring has a small diameter. A guide ring, which is slidably in contact with an inner periphery of the cylinder, is mounted to the small-diameter side end of the control spring.Type: ApplicationFiled: December 18, 2013Publication date: July 7, 2016Applicant: KAYABA INDUSTRY CO., LTD.Inventor: Takashi TERAOKA