Patents by Inventor Masayoshi Kumagai
Masayoshi Kumagai 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: 7314231Abstract: A knee-bag module includes a knee-bag to be inflated in front of a leg portion of a vehicle occupant and an inflator for ejecting gas from a gas outlet thereof to inflate the knee-bag. The inflator is a pyro-type inflator for ejecting only reactant gas.Type: GrantFiled: April 19, 2005Date of Patent: January 1, 2008Assignee: Takata CorporationInventors: Kazuhiro Abe, Masayoshi Kumagai
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Patent number: 7232153Abstract: A leg protection device includes an airbag to be inflated in front of a leg portion of an occupant for protecting the leg portion; a casing for storing a folded airbag; and a gas generating device for inflating the airbag. The airbag is formed of a front panel facing the occupant and a rear panel at the opposite side of the front panel when the airbag is inflated. The airbag has a folded portion folded into the airbag between the front panel and the rear panel at a perimeter of the airbag.Type: GrantFiled: March 29, 2004Date of Patent: June 19, 2007Assignee: Takata CorporationInventors: Masatoshi Kawauchimaru, Masayoshi Kumagai
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Patent number: 7213840Abstract: An occupant leg protection apparatus includes an airbag arranged in front of a vehicle seat, and a gas generator for inflating the airbag. An instrument panel in front of the vehicle seat has an outer layer movable toward an occupant and a base member behind the outer layer. The airbag is disposed between the outer layer and the base member so that the airbag pushes the outer layer to move toward the occupant when the airbag is inflated.Type: GrantFiled: May 19, 2004Date of Patent: May 8, 2007Assignee: Takata CorporationInventor: Masayoshi Kumagai
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Publication number: 20070045997Abstract: An airbag and an airbag apparatus includes a vent hole operable to close or open to a small extent until a passenger crashes into the airbag, and open or close to a large extent when the passenger crashes into the airbag. An interior of an airbag is partitioned into a first chamber at a center and a second chamber which surrounds the first chamber by an inner panel. A rear panel includes a vent hole for communicating the second chamber and the outside of the airbag. A lid member configured to cover the vent hole may be disposed on an outer surface of the rear panel. A tether may connect the lid member to the inner panel through the vent hole.Type: ApplicationFiled: August 22, 2006Publication date: March 1, 2007Applicant: TAKATA CORPORATIONInventors: Kazuhiro Abe, Masayoshi Kumagai
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Patent number: 7168733Abstract: An airbag apparatus includes an airbag having an occupant-side surface and a vehicle-body-side surface opposite to the occupant-side surface when the airbag is inflated, and at least an upper chamber and a lower chamber separated from each other; a gas generator for deploying the airbag; and a gas distributor enclosing the gas generator and having outlet ports for allowing gas from the gas generator to flow into the upper chamber and the lower chamber. A check valve is provided for preventing the gas from flowing from the lower chamber to the upper chamber.Type: GrantFiled: September 23, 2003Date of Patent: January 30, 2007Assignee: Takata CorporationInventors: Masayoshi Kumagai, Kazuhiko Joujima, Kei Tsujimoto
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Patent number: 7163231Abstract: A curtain airbag includes a curtain airbag body folded to have a long substantially elliptic-cylindrical sectional shape and a cover covering the curtain airbag body. On a side surface of the cover, openings are formed at intervals in the longitudinal direction of a folded formation of the curtain airbag body. Through the openings, the curtain airbag body can be visually observed from outside the cover.Type: GrantFiled: January 22, 2003Date of Patent: January 16, 2007Assignee: Takata CorporationInventor: Masayoshi Kumagai
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Publication number: 20060267325Abstract: A passenger protecting apparatus includes a seat including a seat cushion and a seat back. The apparatus also includes an airbag positioned under a seating surface of the seat cushion; an inflator for producing inflation gas to inflate the airbag. The inflator may be located within the airbag.Type: ApplicationFiled: May 24, 2006Publication date: November 30, 2006Inventors: Masayoshi Kumagai, Yasuo Itoga
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Publication number: 20060232050Abstract: A passenger protection system to be mounted to a vehicle includes an airbag having a first airbag section for constraining a driving passenger by being deployed and inflated between the driving passenger and a steering wheel, and a second airbag section that is deployed and inflated on the front side of the vehicle with respect to the steering wheel. Pressure from the first airbag section is received by the steering wheel, and pressure from the second airbag section is received by a front windshield glass and an interior panel positioned on the front side of the vehicle with respect to the steering wheel when the airbag is deployed and inflated. The system provides improved protection for a driving passenger using an airbag in the event of a vehicle accident.Type: ApplicationFiled: April 6, 2006Publication date: October 19, 2006Applicant: TAKATA CORPORATIONInventors: Masayoshi Kumagai, Kazuhiro Abe
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Publication number: 20060192370Abstract: A passenger restraint system is provided in which, in one form, an airbag apparatus is activated according to a state of usage of a seat or a seatbelt apparatus, prediction of crash, and a state of accident together with the seatbelt apparatus. An airbag apparatus includes an airbag, a vent hole for discharging gas from the airbag, a vent hole cover for covering the vent hole, and a constraining device for releasably constraining the vent hole cover in a state of covering the vent hole. In order to make an EA capability of the airbag apparatus relatively low, constraint of the vent hole cover by the constraining device is continued, and the vent hole is brought into a closed state. On the other hand, in order to make the EA capability of the airbag apparatus relatively high, constraint of the vent hole cover by the constraint device is released to release the vent hole.Type: ApplicationFiled: February 27, 2006Publication date: August 31, 2006Applicant: Takata CorporationInventors: Kazuhiro Abe, Masayoshi Kumagai
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Publication number: 20060186656Abstract: A device that includes an airbag and a tether that can be used to form the size and shape of the airbag. The device can include a winder connected to the tether for controlling the length of the tether. The device may be configured to control the size and shape of the airbag to more than two sizes when the airbag is in a deployed state. The airbag can include multiple chambers, wherein the size and shape of the chambers can be controlled independently.Type: ApplicationFiled: February 21, 2006Publication date: August 24, 2006Inventor: Masayoshi KUMAGAI
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Publication number: 20060138752Abstract: An airbag includes an inner panel for partitioning an interior of the airbag into a first chamber and a second chamber surrounding the first chamber. The inner panel has communication ports for communication between the first chamber and the second chamber. In an airbag inflated state, at least some of the communication ports are located in a section of the inner panel that is, with respect to a steering wheel, on a side of the steering wheel opposite from the passenger position. Gas discharged from gas discharge ports is supplied to the second chamber via the communication ports. Inflation of the second chamber, therefore, is accomplished in the early stage of the airbag deployment.Type: ApplicationFiled: December 22, 2005Publication date: June 29, 2006Applicant: TAKATA CORPORATIONInventors: Masayoshi Kumagai, Kazuhiro Abe
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Publication number: 20060138753Abstract: An airbag apparatus includes an airbag, a gas generator, a retainer to which the airbag and the gas generator are attached, and a module cover for covering the folded airbag. The airbag has a front panel, a rear panel, and an inner panel for partitioning the airbag interior into a first chamber and a second chamber. The inner panel has communication ports for communication of inflation gas between the first chamber and the second chamber. In an inflated state, at least a portion of the communication ports is disposed in a section of the inner panel below an upper end of a leg portion of the module cover. Gas discharged from gas discharge ports is supplied to the second chamber via the communication ports. Inflation of the second chamber, therefore, is accomplished in an early stage of airbag deployment.Type: ApplicationFiled: December 22, 2005Publication date: June 29, 2006Applicant: TAKATA CORPORATIONInventors: Masayoshi Kumagai, Kazuhiro Abe
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Publication number: 20060138761Abstract: An airbag includes an inner panel for partitioning an interior of the airbag into a first chamber and a second chamber surrounding the first chamber. The inner panel has at least one communication port for communication between the first chamber and the second chamber. In an airbag uninflated state in which the inner panel and the rear panel are flatly deployed, at least part of the communication port is located within a range of 35 to 150 mm in radius from the center of a gas generator insertion port. Gas discharged from a gas discharge port is supplied to the second chamber via the communication port. Inflation of the second chamber, therefore, is accomplished in the early stage of the airbag deployment.Type: ApplicationFiled: December 22, 2005Publication date: June 29, 2006Applicant: TAKATA CORPORATIONInventors: Masayoshi Kumagai, Kazuhiro Abe
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Publication number: 20060131859Abstract: A twin airbag with left and right airbag sections joined together. Each of the left and right airbag sections has at least one vent hole in a panel opposite to a corresponding inner facing panel. The vent holes are disposed at positions at which they align with each other when the airbag sections are flattened. Portions of the inner facing panels of the airbag sections may be stitched together through the vent holes.Type: ApplicationFiled: November 17, 2005Publication date: June 22, 2006Inventor: Masayoshi Kumagai
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Publication number: 20060119149Abstract: A passenger-protecting apparatus is provided with which poor seat-sitting comfortability is prevented and in which a fixing work, a maintenance work, and the like are performed with good workability. In one form, a seat cushion is supported from below by a supporting member including a seat pan and springs, and the supporting member has a passenger-protecting apparatus disposed under the front part thereof Upon detection of a frontal car collision, an inflator discharges gas, so that the gas from the inflator inflates a bag. The inflated bag pushes the front part of the supporting member upwards. As a result, the front part of the seat cushion has a higher density because of being pushed up or pressed from below via the seat pan and the springs, thereby preventing or inhibiting the waist of a passenger from moving forwards.Type: ApplicationFiled: December 1, 2005Publication date: June 8, 2006Applicant: Takata CorporationInventors: Hiromichi Yoshikawa, Masayoshi Kumagai
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Publication number: 20060091649Abstract: An airbag is partitioned into a first chamber and a second chamber, not having significant irregularities or partial protrusions on the front surface thereof (front panel) during the expansion, and is capable of catching an occupant in a substantially even manner at the front surface thereof. The airbag is formed by connecting a front panel and a rear panel by a first seam. An inner panel is disposed inside the airbag. The inner panel has communicating holes and inner vent holes. The inner periphery of the inner panel is connected to the front panel by a second seam. When the airbag is flattened, the ratio C1/C2 of a perimeter C1 of the second seam to a perimeter C2 of the first seam ranges from about 0.35 to about 0.8.Type: ApplicationFiled: September 29, 2005Publication date: May 4, 2006Applicant: TAKATA CORPORATIONInventors: Masayoshi Kumagai, Kazuhiro Abe
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Patent number: 7021652Abstract: An airbag apparatus includes an airbag having an interior divided into a plurality of chambers, and a gas generator for inflating the airbag so that gas is guided directly to each chamber from the gas generator. Further, a gas distributor having a plurality of gas outlets is attached to a gas outlet of the gas generator. The gas is supplied to the respective chambers through the gas outlets of the gas distributor.Type: GrantFiled: February 3, 2003Date of Patent: April 4, 2006Assignee: Takata CorporationInventors: Masayoshi Kumagai, Akifumi Taketomi, Tadashi Tanaka, Takeshi Kurimoto
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Patent number: 7000947Abstract: An airbag device including an airbag that provides more effective protection of an occupant. The airbag has an indentation located approximately in the center of a contact surface thereof. The indentation is formed in the shape of a recess or a valley to form the airbag into a heart-like shape. The area including the indentation is at least greater than an area where comes in contact with the face of an occupant. The deepest point of the dent (the farthest point from the occupant in the contact surface) is positioned below the jaw of the occupant. The contact surface extending from the deepest point of the dent to the upper projection top thereof overhangs toward the occupant to have an angle between 0° and 45° (preferably, between 15° and 25°) relative to the cervical vertebrae axis of the occupant.Type: GrantFiled: February 6, 2003Date of Patent: February 21, 2006Assignee: Takata CorporationInventors: Masayoshi Kumagai, Hideaki Okamoto, Shingo Nakahara
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Patent number: 6988743Abstract: An airbag apparatus in which a front portion of an airbag is inflated earlier than a rear portion of the airbag. A passenger-side airbag apparatus includes an airbag, a container accommodating the airbag, an inflator for generating gas for inflating the airbag, and a lid for covering an opening in the top of the container. A rear portion of the airbag is first folded, left and right portions of the airbag are then folded, and after that, a front portion (vehicle-front-side portion) of the airbag is folded.Type: GrantFiled: April 5, 2002Date of Patent: January 24, 2006Assignee: Takata CorporationInventors: Hideaki Okamoto, Masayoshi Kumagai
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Publication number: 20050230939Abstract: A knee-bag module includes a knee-bag to be inflated in front of a leg portion of a vehicle occupant and an inflator for ejecting gas from a gas outlet thereof to inflate the knee-bag. The inflator is a pyro-type inflator for ejecting only reactant gas.Type: ApplicationFiled: April 19, 2005Publication date: October 20, 2005Applicant: TAKATA CORPORATIONInventors: Kazuhiro Abe, Masayoshi Kumagai