Patents by Inventor Kenji Muramatsu
Kenji Muramatsu 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: 20090130532Abstract: In a mixing pump device (1), during an suctioning step a stepping motor (12) rotates in a first direction, so that during this time, a plurality of fluids can be drawn in prescribed proportions into a pump chamber (2), by sequentially opening and closing active valves (5a, 5b) situated in inflow passages (3a, 3b) while active valves (6a, 6b) situated in outflow passages (4a, 4b) are in a closed state. During the discharging step the stepping motor (12) rotates in a second direction, so that during this time, a mixed fluid can be discharged from the pump chamber (2) simply by sequentially opening the active valves (6a, 6b) situated in the outflow passages (4a, 4b), while the active valves (5a, 5b) situated in the inflow passages (3a, 3b) are in a closed state. It is possible thereby to achieve a mixing pump device capable of mixing a plurality of fluids in prescribed proportions, without detecting the operating stage of the pump.Type: ApplicationFiled: February 9, 2007Publication date: May 21, 2009Applicant: NIDEC SANKYO CORPORATIONInventors: Mitsuo Yokozawa, Kenji Muramatsu, Katsumi Kozu, Toshihiko Ichinose
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Publication number: 20090123299Abstract: During switchover from a suctioning step to a discharging step, a mixing pump (1) carries out a correcting step for displacing a displacing member (17) in the direction for reducing an internal volume of a pump chamber (2); and during switchover from the discharging step to the suctioning step, the pump carries out a correcting step for displacing a displacing member (17) in the direction for increasing the internal volume of the pump chamber (2). In the correcting step, intake ports (30a, 30b), and discharging ports (40a, 40b) of the pump chamber (2) are closed, and the displacing member (17) undergoes displacement for increasing or reducing the internal volume of the pump chamber (2) in a hermetic state. Instability caused by backlash of the displacing member (17) drive system can be eliminated, and a pressure difference between the pump chamber (2) interior and the fluid intake end or the fluid discharge end can be eliminated.Type: ApplicationFiled: February 9, 2007Publication date: May 14, 2009Inventors: Mitsuo Yokozawa, Kenji Muramatsu
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Publication number: 20090035629Abstract: A multi-channel pump includes a pump chamber, an inflow passage connected to the pump chamber, two or more outflow passages connected to the pump chamber, outflow side active valves provided so as to correspond to the outflow passages, and a movable body reciprocated to change a volumetric capacity of the pump chamber. The movable body may be a piston reciprocated within a cylinder that is connected to the pump chamber. A control method for a multi-channel pump includes an initial discharge step between a suction step and a discharge step. The multi-channel pump may be preferably utilized in a fuel cell.Type: ApplicationFiled: October 6, 2008Publication date: February 5, 2009Applicants: NIDEC SANKYO CORPORATION, MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Mitsuo Yokozawa, Kenji Muramatsu
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Publication number: 20070181838Abstract: A valve drive device may include a motor, a rotational member rotated by the motor, a linearly moving member engaged with the rotary member, a converting mechanism for converting rotation of the rotational member into linear movement of the linearly moving member, a diaphragm valve for opening or closing an opening part by linearly moving member, and an urging member for closing the opening part through the diaphragm valve. The linearly moving member is linearly moved by the rotational member and the opening part is closed by the diaphragm valve in a state that the rotational member and the linearly moving member are in a non-engagement state. The valve drive device may be mounted on a pump having an inflow path and a plurality of outflow paths.Type: ApplicationFiled: December 8, 2006Publication date: August 9, 2007Inventor: Kenji Muramatsu
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Patent number: 7243995Abstract: A second row seat is guided by a vehicle-longitudinal-direction sliding mechanism and a vehicle-width-direction siding mechanism supported on the vehicle-longitudinal-direction sliding mechanism. The vehicle-width-direction sliding mechanism is configured such that a length thereof is set within a width of a recess portion formed at the bottom face of a seat cushion so as to allow the vehicle-width-direction sliding mechanism to be placed within the recess portion when the seat cushion has been moved forward and downward by a moving mechanism. Accordingly, a load floor formed by a back face of a seat back according to a forward movement of the seat back with its lower and horizontal position can be obtained.Type: GrantFiled: June 3, 2004Date of Patent: July 17, 2007Assignee: Mazda Motor CorporationInventors: Kouichi Nakaya, Kenji Muramatsu
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Publication number: 20070063567Abstract: When a seat back in a forwardly folded state is raised to a predetermined raised state by activating an electric motor by turning on a switch, the electric motor is immediately stopped even if the switch is still turned on, and the seat back is retained in the raised state. There are provided a locking member which operates to retain the seat back in the raised state when the seat back is in the predetermined raised state and a lever which turns in association with the operation of the locking member. The lever turns on another switch to open a drive circuit for the electric motor.Type: ApplicationFiled: September 6, 2006Publication date: March 22, 2007Applicant: MAZDA MOTOR CORPORATIONInventors: Kouichi Nakaya, Kenji Muramatsu
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Publication number: 20060145797Abstract: A linear actuator may include a fixed body having a coil wound around in a ring-shaped manner and a movable body. The movable body may include a first movable body side yoke which is disposed on the inner side of the coil and a pair of magnets which is laminated on both sides in an axial direction of the first movable body side yoke such that the same polarities of the magnets face the first movable body side yoke. The movable body may be driven in the axial direction. The linear actuator may be applied to a valve device and a pump device.Type: ApplicationFiled: November 30, 2005Publication date: July 6, 2006Inventors: Kenji Muramatsu, Hiroshi Sugihara, Kiyotsugu Takasawa, Mitsuo Yokozawa
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Patent number: 7072732Abstract: A computer solves an item-based one-dimensional sub-optimization problem independently of the other items. For the item-based solution found, the computer determines whether machine interference between the items is eliminated and whether a work-in-process inventory is sufficient. If machine interference is not eliminated or the work-in-process inventory is not insufficient, then the computer updates a corresponding Lagrange multiplier and reexecutes the solving of the problem.Type: GrantFiled: December 27, 2002Date of Patent: July 4, 2006Assignees: Tokai University Educational System, Information and Mathematical Science LaboratoryInventors: Kenji Muramatsu, Aditya Warman, Minoru Kobayashi, Takuya Yamaguchi
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Publication number: 20060038412Abstract: An embodiment of the apparatus relates to a door opening and closing assisting device comprising: a spring force to urge the door in a closed direction when the door is half-opened or less and supplies no closing force when the door is more than half-opened. The assisting device is housed either in the door or the main body. The method relates to assisting in opening and closing a door comprising: elastically deforming a spring in response to the door being opened to a half-opened position; disconnecting the spring force if the door is more than half-opened and reconnecting the spring force to the door when the door is half-opened or less.Type: ApplicationFiled: August 17, 2005Publication date: February 23, 2006Inventors: Kenji Muramatsu, Katsuhiko Hayashi, Kiyotsugu Takasawa
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Patent number: 6991287Abstract: In a vehicle seat system equipped with an active headrest mechanism (30) and a lumbar support (21), a load-receiving part (32) of the active headrest mechanism (30) is positioned behind the lumbar support (21) as viewed from front of the seat. The vehicle seat system is arranged so that when a specified amount or more of load is applied from front of the seat to a lumbar support plate (22) of the lumbar support (21), one end part of a plate support member (23) supporting the lumbar support plate (22) exits from an insertion hole (17) provided at a side frame (4) to disengage from a seatback frame (2), and the disengaged end part of the plate support member (23) then abuts on the load-receiving part (32).Type: GrantFiled: June 2, 2005Date of Patent: January 31, 2006Assignees: Toyo Seat Co., Ltd., Mazda Motor CorporationInventors: Kazuharu Ogawa, Hideki Yokoyama, Kouji Matsushita, Kenji Muramatsu, Naoki Kaneko
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Publication number: 20060013703Abstract: A multi-channel pump includes a pump chamber, an inflow passage connected to the pump chamber, two or more outflow passages connected to the pump chamber, outflow side active valves provided so as to correspond to the outflow passages, and a movable body reciprocated to change a volumetric capacity of the pump chamber. The movable body may be a piston reciprocated within a cylinder that is connected to the pump chamber. A control method for a multi-channel pump includes an initial discharge step between a suction step and a discharge step.Type: ApplicationFiled: July 7, 2005Publication date: January 19, 2006Inventors: Mitsuo Yokozawa, Kenji Muramatsu
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Publication number: 20060006721Abstract: In a vehicle seat system equipped with an active headrest mechanism (30) and a lumbar support (21), a load-receiving part (32) of the active headrest mechanism (30) is positioned behind the lumbar support (21) as viewed from front of the seat. The vehicle seat system is arranged so that when a specified amount or more of load is applied from front of the seat to a lumbar support plate (22) of the lumbar support (21), one end part of a plate support member (23) supporting the lumbar support plate (22) exits from an insertion hole (17) provided at a side frame (4) to disengage from a seatback frame (2), and the disengaged end part of the plate support member (23) then abuts on the load-receiving part (32).Type: ApplicationFiled: June 2, 2005Publication date: January 12, 2006Applicants: Toyo Seat Co., Ltd., Mazda Motor CorporationInventors: Kazuharu Ogawa, Hideki Yokoyama, Kouji Matsushita, Kenji Muramatsu, Naoki Kaneko
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Publication number: 20050271525Abstract: A pump device may include an eccentric member mounted on an output shaft in an eccentric manner, a cam mechanism which is engaged with the eccentric member to convert a motion of the output shaft into a radial direction and at least one pump body which includes a diaphragm that is moved in the radial direction in relation to the output shaft by the cam mechanism for performing a pumping operation.Type: ApplicationFiled: June 2, 2005Publication date: December 8, 2005Inventors: Kenji Muramatsu, Motohiro Iizawa
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Publication number: 20040256901Abstract: A second row seat is guided by a vehicle-longitudinal-direction sliding mechanism and a vehicle-width-direction siding mechanism supported on the vehicle-longitudinal-direction sliding mechanism. The vehicle-width-direction sliding mechanism is configured such that a length thereof is set within a width of a recess portion formed at the bottom face of a seat cushion so as to allow the vehicle-width-direction sliding mechanism to be placed within the recess portion when the seat cushion has been moved forward and downward by a moving mechanism. Accordingly, a load floor formed by a back face of a seat back according to a forward movement of the seat back with its lower and horizontal position can be obtained.Type: ApplicationFiled: June 3, 2004Publication date: December 23, 2004Applicant: MAZDA MOTOR CORPORATIONInventors: Kouichi Nakaya, Kenji Muramatsu
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Patent number: 6824167Abstract: A seat belt system which does not interfere with the ingress and egress of rear seat passengers, and can detect the presence of an occupant without being influenced by the seat belt tension to provide the accurate weight detection. In one embodiment, the seat belt system comprises a retractor disposed in the rear door, an anchor of the seat belt webbing, and a rail member that allows the anchor of the seat belt webbing to slide in the vehicular longitudinal direction. The front end of the rail member is attached substantially on the seat side above a weight detecting device. The weight detecting device is disposed between the front seat and the floor panel, while the buckle capable of engaging the tongue of the seat belt webbing is disposed on the seat above the weight detecting device.Type: GrantFiled: February 12, 2003Date of Patent: November 30, 2004Assignee: Mazda Motor CorporationInventors: Yousuke Nishimoto, Takayuki Seto, Kenji Muramatsu, Hiroaki Nakao
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Patent number: 6692237Abstract: A rotary cylinder apparatus which prevents a fluid from leaking from a contact portion of a piston and a cylinder member and consequently enables efficient rotation. The rotary cylinder apparatus comprises: a rotary cylinder member 2 which has cylinder chambers 22 and 23 formed thereto so as to pass through a rotary shaft center O and rotates around the rotary shaft center O; pistons 3 and 4 demonstrating reciprocating linear motion in the cylinder chambers 22 and 23; a piston holding member 5 which holds the pistons 3 and 4 and rotates around a rotation center X eccentric from the rotary shaft center O of the rotary cylinder member 2; and a casing 6 which rotatably supports the rotary cylinder member 2 and has at least one inlet 61 and at least one outlet 62, wherein the pistons 3 and 4 are rotatably supported at a position away from the rotation center X of the piston holding member 5 by a fixed distance and with that position at the center thereof.Type: GrantFiled: December 11, 2001Date of Patent: February 17, 2004Assignee: Kabushiki Kaisha Sankyo Seiki SeisakushoInventors: Fumito Komatsu, Kenji Muramatsu, Yuki Nakamura, Tomohiro Takeuchi
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Publication number: 20030178835Abstract: A seat belt system which does not interfere with the ingress and egress of rear seat passengers, and can detect the presence of an occupant without being influenced by the seat belt tension to provide the accurate weight detection. In one embodiment, the seat belt system comprises a retractor disposed in the rear door, an anchor of the seat belt webbing, and a rail member that allows the anchor of the seat belt webbing to slide in the vehicular longitudinal direction. The front end of the rail member is attached substantially on the seat side above a weight detecting device. The weight detecting device is disposed between the front seat and the floor panel, while the buckle capable of engaging the tongue of the seat belt webbing is disposed on the seat above the weight detecting device.Type: ApplicationFiled: February 12, 2003Publication date: September 25, 2003Applicant: MAZDA MOTOR CORPORATIONInventors: Yousuke Nishimoto, Takayuki Seto, Kenji Muramatsu, Hiroaki Nakao
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Publication number: 20030105543Abstract: A computer solves an item-based one-dimensional sub-optimization problem independently of the other items. For the item-based solution found, the computer determines whether machine interference between the items is eliminated and whether a work-in-process inventory is sufficient. If machine interference is not eliminated or the work-in-process inventory is not insufficient, then the computer updates a corresponding Lagrange multiplier and reexecutes the solving of the problem.Type: ApplicationFiled: December 27, 2002Publication date: June 5, 2003Applicant: Tokai University Educational SystemInventors: Kenji Muramatsu, Aditya Warman, Minoru Kobayashi, Takuya Yamaguchi
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Patent number: 6517364Abstract: A connector-with-lever comprising a first connector (11), a second connector (12) and a lever (14) turnably mounted to a connector housing (13) of the first connector (11), in which the first connector (11) and the second connector (12) are connected to each other by operating the lever (14), wherein the connector-with-lever further comprises lever locking means (18A), (23) for temporarily lock the lever (14) with the connector housing before the first connector (11) and the second connector (12) are connected to each other, and unlocking means (28) for unlocking the temporary locking state of the lever (14) when the first connector (11) and the second connector (12) start being connected to each other.Type: GrantFiled: February 21, 2001Date of Patent: February 11, 2003Assignee: Yazaki CorporationInventors: Kenji Muramatsu, Toshiharu Kawashima
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Publication number: 20010053621Abstract: A connector-with-lever comprising a first connector (11), a second connector (12) and a lever (14) turnably mounted to a connector housing (13) of the first connector (11), in which the first connector (11) and the second connector (12) are connected to each other by operating the lever (14), wherein the connector-with-lever further comprises lever locking means (18A), (23) for temporarily lock the lever (14) with the connector housing before the first connector (11) and the second connector (12) are connected to each other, and unlocking means (28) for unlocking the temporary locking state of the lever (14) when the first connector (11) and the second connector (12) start being connected to each other.Type: ApplicationFiled: February 21, 2001Publication date: December 20, 2001Inventors: Kenji Muramatsu, Toshiharu Kawashima