Patents by Inventor Yoshiyuki Seki
Yoshiyuki Seki 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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Publication number: 20240167488Abstract: A fluid circuit includes: a fluid supply device that delivers a working fluid; and an accumulator that accumulates the working fluid which is increased in pressure. A variable throttle valve and the accumulator are disposed in a branch flow passage branched from a main flow passage extending from the fluid supply device to an actuator. A first pressure detector is provided between the variable throttle valve and the accumulator, a second pressure detector is provided in the branch flow passage between the main flow passage and the variable throttle valve, and the variable throttle valve is controllable based on pressures detected by the first pressure detector and the second pressure detector. A check valve is provided in the branch flow passage.Type: ApplicationFiled: March 17, 2022Publication date: May 23, 2024Inventors: Tatsuhiro ARIKAWA, Yoshiyuki SHIMADA, Tomoki SEKI, Yuta OKAMOTO, Koji SATO
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Publication number: 20240159255Abstract: A first switching valve that switches between flow passages which allow communication between a first pressure-receiving chamber and a fluid supply device side and flow passages which allow communication between a second pressure-receiving chamber and the fluid supply device side, according to a change in a fluid pressure to be applied, and a second switching valve that is switched to flow passages which apply the fluid pressure to the first switching valve, are provided. The second switching valve includes return device, and is provided to be reciprocatable between an operation position to which the second switching valve is moved by a stroke of a piston and a return position to which the second switching valve is moved by the return device. The piston and the second switching valve are movable independently of each other.Type: ApplicationFiled: March 17, 2022Publication date: May 16, 2024Inventors: Yoshiyuki SHIMADA, Koji SATO, Yuta OKAMOTO, Tomoki SEKI, Tatsuhiro ARIKAWA
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Publication number: 20240159252Abstract: A fluid circuit includes first switching valve that switches between flow passages and first flow passages according to a change in a fluid pressure to be applied, a second switching valve that is switched to a flow passage which applies the fluid pressure to the first switching valve, when a piston has reached an initial position or an end position, and second flow passages. A biasing force of a biasing member when the piston reaches the end position is smaller than a pressing force acting on the piston due to the fluid pressure caused by a fluid supply device, and a biasing force of the biasing member when the piston reaches the initial position is larger than a sum of a flow passage resistance force acting on the first flow passages and a flow passage resistance force acting on the second flow passages.Type: ApplicationFiled: March 17, 2022Publication date: May 16, 2024Inventors: Yoshiyuki SHIMADA, Koji SATO, Yuta OKAMOTO, Tomoki SEKI, Tatsuhiro ARIKAWA
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Patent number: 8359889Abstract: A vehicle door handle device, includes a cylinder lock for locking and unlocking a locking mechanism of an opening/closing panel, and a pair of pivot members pivotally attached to the opening/closing panel. One pivot member of the pair of pivot members is formed of a shutter capable of opening and closing a key insert hole of the cylinder lock, and another pivot member of the pair of pivot members has a pivotal force transmitting portion for transmitting a pivotal force in a direction to open the key insert hole to the one pivot member and is formed of an operating handle for opening and closing the opening/closing panel.Type: GrantFiled: February 15, 2012Date of Patent: January 29, 2013Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventors: Toshiharu Katagiri, Yoshiyuki Seki
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Patent number: 8359943Abstract: A gearshift device for an automatic transmission that prevents inadvertent gearshift operations. The gearshift device includes a shaft-shaped gearshift member partially exposed from a housing so as to be rotatable relative to the housing about a rotation axis and movable sidewards in at least a first direction that intersects the rotation axis. The gearshift member is rotated to a plurality of rotation positions respectively corresponding to the gear positions of the automatic transmission. A movement restriction unit permits movement of the gearshift member in the first direction only when the gearshift member is rotated to a selected one of the rotation positions to determine shifting to the gear position corresponding to the selected one of the rotation positions. A control unit provides the automatic transmission with a gearshift control signal corresponding to the selected one of the rotation positions.Type: GrantFiled: October 31, 2008Date of Patent: January 29, 2013Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventor: Yoshiyuki Seki
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Patent number: 8330571Abstract: A vehicle electronic portable key system including a master key and sub-key. A retainer is arranged in the vehicle to retain the sub-key. A control unit determines whether the master key or sub-key is located in a vehicle interior or exterior wireless communicatable area. When the key is located in one of the wireless communicatable areas, the control unit permits various operations of the vehicle in accordance with the communicable area in which the key is located. The control unit determines that the sub-key is in a lent state if the sub-key is removed from the retainer when the master key is located in the interior wireless communicatable area. In a state in which the sub-key is located in one of the wireless communicatable areas after removal from the retainer, the control unit limits the operations of the vehicle unless the sub-key is determined as being in the lent state.Type: GrantFiled: October 13, 2009Date of Patent: December 11, 2012Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventors: Jun Yamaguchi, Toshiharu Katagiri, Takumi Tamezane, Yoshiyuki Seki
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Publication number: 20120137743Abstract: A vehicle door handle device, includes a cylinder lock for locking and unlocking a locking mechanism of an opening/closing panel, and a pair of pivot members pivotally attached to the opening/closing panel. One pivot member of the pair of pivot members is formed of a shutter capable of opening and closing a key insert hole of the cylinder lock, and another pivot member of the pair of pivot members has a pivotal force transmitting portion for transmitting a pivotal force in a direction to open the key insert hole to the one pivot member and is formed of an operating handle for opening and closing the opening/closing panel.Type: ApplicationFiled: February 15, 2012Publication date: June 7, 2012Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Toshiharu KATAGIRI, Yoshiyuki SEKI
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Patent number: 8193906Abstract: A mechanical key code verification system including a mechanical key and a lock apparatus into which the mechanical key is inserted. The mechanical key includes a key body. A key code pattern formed on the key body includes a plurality of recessed portions and a plurality of non-recessed portions. A wireless communication mechanism is incorporated in the key body which performs wireless communication with a communication device. The wireless communication device including an antenna arranged on the key body. The lock apparatus mechanically verifies the key code pattern of the mechanical key when the mechanical key is inserted therein. The recessed portions of the key code pattern of the mechanical key is located inward from the antenna on the key body.Type: GrantFiled: December 16, 2008Date of Patent: June 5, 2012Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventors: Toshiharu Katagiri, Yoshiyuki Seki, Tamotsu Tsuchida
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Patent number: 8156776Abstract: A card type mechanical key including a card member having a card surface and an edge portion. The card member includes a mechanical code pattern formed by partially eliminating the card surface or the edge portion and functioning as a verification code mechanically verifiable by a lock device. A fitting member is fitted to the mechanical code pattern. A concealment sticker is adhered removably to the card member in a state in which the fitting member is fitted to the mechanical code pattern of the card member so as to conceal the mechanical code pattern and the fitting member.Type: GrantFiled: May 27, 2009Date of Patent: April 17, 2012Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventor: Yoshiyuki Seki
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Patent number: 8146393Abstract: A vehicle door handle device, includes a cylinder lock for locking and unlocking a locking mechanism of an opening/closing panel, and a pair of pivot members pivotally attached to the opening/closing panel. One pivot member of the pair of pivot members is formed of a shutter capable of opening and closing a key insert hole of the cylinder lock, and another pivot member of the pair of pivot members has a pivotal force transmitting portion for transmitting a pivotal force in a direction to open the key insert hole to the one pivot member and is formed of an operating handle for opening and closing the opening/closing panel.Type: GrantFiled: January 30, 2009Date of Patent: April 3, 2012Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventors: Toshiharu Katagiri, Yoshiyuki Seki
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Patent number: 8042367Abstract: A tumbler-type key verification system including a tumbler-type key and a lock apparatus. The lock apparatus includes a support member, a movable member movable relative to the support member, tumblers which are biased by tumbler springs and are arranged to engage with the support member and the movable member, and a lock mechanism that reinforces the locking strength of the tumblers. The lock mechanism having a two-piece structure including a first piece movably accommodated in the movable member and a second piece movably accommodated in the support member. The lock mechanism reinforces the locking strength of the tumblers by having the first piece or the second piece engage both the movable member and the support member before the tumbler-type key is inserted into the lock apparatus or when the tumbler-type key is being inserted into the lock apparatus.Type: GrantFiled: October 2, 2008Date of Patent: October 25, 2011Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventors: Takumi Tamezane, Yoshiyuki Seki
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Patent number: 8011214Abstract: A valet key storage device, includes a valet key storage portion for storing a valet key having an opening, a locking bar for locking the valet key, a driving section for driving the locking bar to be inserted into the opening of the valet key, and a control section for controlling the driving section to insert the locking bar into the opening of the valet key or remove the locking bar therefrom.Type: GrantFiled: September 2, 2008Date of Patent: September 6, 2011Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventors: Toshiharu Katagiri, Yoshiyuki Seki
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Publication number: 20100090817Abstract: A vehicle electronic portable key system including a master key and sub-key. A retainer is arranged in the vehicle to retain the sub-key. A control unit determines whether the master key or sub-key is located in a vehicle interior or exterior wireless communicatable area. When the key is located in one of the wireless communicatable areas, the control unit permits various operations of the vehicle in accordance with the communicable area in which the key is located. The control unit determines that the sub-key is in a lent state if the sub-key is removed from the retainer when the master key is located in the interior wireless communicatable area. In a state in which the sub-key is located in one of the wireless communicatable areas after removal from the retainer, the control unit limits the operations of the vehicle unless the sub-key is determined as being in the lent state.Type: ApplicationFiled: October 13, 2009Publication date: April 15, 2010Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: JUN YAMAGUCHI, Toshiharu Katagiri, Takumi Tamezane, Yoshiyuki Seki
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Publication number: 20090293565Abstract: A card type mechanical key including a card member having a card surface and an edge portion. The card member includes a mechanical code pattern formed by partially eliminating the card surface or the edge portion and functioning as a verification code mechanically verifiable by a lock device. A fitting member is fitted to the mechanical code pattern. A concealment sticker is adhered removably to the card member in a state in which the fitting member is fitted to the mechanical code pattern of the card member so as to conceal the mechanical code pattern and the fitting member.Type: ApplicationFiled: May 27, 2009Publication date: December 3, 2009Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventor: Yoshiyuki SEKI
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Publication number: 20090205383Abstract: A vehicle door handle device, includes a cylinder lock for locking and unlocking a locking mechanism of an opening/closing panel, and a pair of pivot members pivotally attached to the opening/closing panel. One pivot member of the pair of pivot members is formed of a shutter capable of opening and closing a key insert hole of the cylinder lock, and another pivot member of the pair of pivot members has a pivotal force transmitting portion for transmitting a pivotal force in a direction to open the key insert hole to the one pivot member and is formed of an operating handle for opening and closing the opening/closing panel.Type: ApplicationFiled: January 30, 2009Publication date: August 20, 2009Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Toshiharu KATAGIRI, Yoshiyuki SEKI
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Publication number: 20090153294Abstract: A mechanical key code verification system including a mechanical key and a lock apparatus into which the mechanical key is inserted. The mechanical key includes a key body. A key code pattern formed on the key body includes a plurality of recessed portions and a plurality of non-recessed portions. A wireless communication mechanism is incorporated in the key body which performs wireless communication with a communication device. The wireless communication device including an antenna arranged on the key body. The lock apparatus mechanically verifies the key code pattern of the mechanical key when the mechanical key is inserted therein. The recessed portions of the key code pattern of the mechanical key is located inward from the antenna on the key body.Type: ApplicationFiled: December 16, 2008Publication date: June 18, 2009Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Toshiharu Katagiri, Yoshiyuki Seki, Tamotsu Tsuchida
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Publication number: 20090107287Abstract: A gearshift device for an automatic transmission that prevents inadvertent gearshift operations. The gearshift device includes a shaft-shaped gearshift member partially exposed from a housing so as to be rotatable relative to the housing about a rotation axis and movable sidewards in at least a first direction that intersects the rotation axis. The gearshift member is rotated to a plurality of rotation positions respectively corresponding to the gear positions of the automatic transmission. A movement restriction unit permits movement of the gearshift member in the first direction only when the gearshift member is rotated to a selected one of the rotation positions to determine shifting to the gear position corresponding to the selected one of the rotation positions. A control unit provides the automatic transmission with a gearshift control signal corresponding to the selected one of the rotation positions.Type: ApplicationFiled: October 31, 2008Publication date: April 30, 2009Applicant: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventor: Yoshiyuki Seki
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Publication number: 20090064740Abstract: A valet key storage device, includes a valet key storage portion for storing a valet key having an opening, a locking bar for locking the valet key, a driving section for driving the locking bar to be inserted into the opening of the valet key, and a control section for controlling the driving section to insert the locking bar into the opening of the valet key or remove the locking bar therefrom.Type: ApplicationFiled: September 2, 2008Publication date: March 12, 2009Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventors: Toshiharu KATAGIRI, Yoshiyuki SEKI
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Publication number: 20070209412Abstract: A cylinder lock device (1) includes: a rotor (30) rotatably disposed inside a cylindrical case body (20), a key insertion hole (31) being formed in the rotor (30) to axially extend; tumblers (50) provided in the rotor (30) to be axially movable, the tumblers (50) being radially urged outward to be engaged with a sleeve (40), the engagement of the tumblers (50) with the sleeve (40) being released when a normal key is inserted into a key insertion hole (31); slide members (70) for axially moving toward a lever member (60) side whenever the sleeve (40) relatively rotates by a predetermined angle with respect to the case body (20); a clutch member (80) disposed between the rotor (30) and the lever member (60), the clutch member (80) being provided in the lever member (60) to be axially movable; and an urgement member (90) for urging the clutch member (80) to a rotor (30) side so that the clutch member (80) is engaged with the rotor (30), in which when the slide members (70) move toward the lever member (60) side,Type: ApplicationFiled: March 5, 2007Publication date: September 13, 2007Applicant: Tokai Rika Co., Ltd.Inventors: Toshiharu Shiramizu, Yoshiyuki Seki
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Patent number: 6862908Abstract: A key case comprises three parts, a center body, a first case piece, and a second case piece. The center body has a first cavity which side facing the first case piece is opened. The second case piece has four tabs extending toward the first case piece at positions substantially opposite to the peripheral surface of the first cavity. Each tab includes a claw on its distal end. The center body has apertures through which the corresponding tabs can pass therethrough. Following to each aperture, a groove and a shoulder are formed in the peripheral surface of the first cavity. A wireless module is contained in the first cavity while claws pass through the corresponding apertures to be engaged with the shoulders. The wireless module is sized to prevent the claws from disengaging from the shoulders.Type: GrantFiled: October 22, 2002Date of Patent: March 8, 2005Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventor: Yoshiyuki Seki