Patents by Inventor Takashi Murayama
Takashi Murayama 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: 20050243528Abstract: The flexible wiring board included in a board piece is exposed at both ends of the board piece, and connected to heterogeneous pieces via connecting flexible wiring boards to form a composite wiring board. Such a board piece is more convenient than storing the composite wiring board because various components can be individually stored and handled.Type: ApplicationFiled: July 8, 2005Publication date: November 3, 2005Applicant: Sony Chemicals Corp.Inventor: Takashi Murayama
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Publication number: 20040026187Abstract: A wedge-operated disc brake apparatus includes a piston accommodated within a cylinder portion to be slidable along an axial direction of the piston and adapted to push a brake pad toward a brake rotor, an actuator for generating a linear brake-actuating input, and a wedge transmission mechanism for converting the linear brake-actuating input into a brake-actuating output in the axial direction of the piston. The brake-actuating output is transmitted to the piston so as to cause the piston to push the brake pad toward the brake rotor. A resilient member is provided in order to axially urge the piston toward a direction away from the brake pad. A bearing may be provided between the piston and the cylinder portion in order to enable smooth axial movement of the piston.Type: ApplicationFiled: July 30, 2003Publication date: February 12, 2004Applicant: ADVICS CO., LTD.Inventor: Takashi Murayama
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Publication number: 20040026186Abstract: A wedge-operated disc brake apparatus includes a piston for pushing a brake pad toward a brake rotor when driven, an actuator for generating a linear brake-actuating input, a wedge transmission mechanism for converting the linear brake-actuating input into a brake-actuating output in the axial direction of the piston, and an automatic gap adjusting mechanism for automatically adjusting a gap between the brake pad and the brake rotor during a non-braking state.Type: ApplicationFiled: July 30, 2003Publication date: February 12, 2004Applicant: ADVICS CO., LTD.Inventor: Takashi Murayama
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Publication number: 20040026190Abstract: An electric brake apparatus includes an electric motor which generates a rotational drive force. A gear train is driven by the electric motor and generates a rotational drive force. A screw feed mechanism is driven by the gear train and converts the rotational drive force from the gear train into a linear drive force. A wedge transmission mechanism is driven by the screw feed mechanism and converts the linear drive force from the screw feed mechanism into a linear drive force transverse to the linear drive force from the screw feed mechanism. A piston is driven by the wedge transmission mechanism in an axial direction of the piston and generates a braking force.Type: ApplicationFiled: July 28, 2003Publication date: February 12, 2004Applicant: Advics Co., Ltd.Inventors: Takashi Murayama, Daizo Oba
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Publication number: 20040026185Abstract: A wedge-operated brake apparatus includes a piston for generating a braking force when axially driven, an actuator for generating a linear brake-actuating input, and a wedge transmission mechanism for converting the linear brake-actuating input into a brake-actuating output in the axial direction of the piston. The brake-actuating output is transmitted to the piston so as to drive the piston to thereby generate a braking force. The wedge transmission mechanism includes a first plate member which moves together with the piston, a second plate member disposed in opposition to the first plate member and fixedly secured to a housing, a wedge member disposed between the first and second plate members and engaging respective engaging surfaces of the first and second plate members via rollers, and a holder for rotatably holding the rollers and holding the wedge member while allowing linear movement of the wedge member.Type: ApplicationFiled: July 28, 2003Publication date: February 12, 2004Applicant: Advics Co., Ltd.Inventors: Takashi Murayama, Daizo Oba
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Patent number: 6643927Abstract: In a pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other the respective reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports. The respective discharge fluid conduits, in case of the first and second pumps, are located at the points which are opposite each other, more preferably, different at an angle of 180 degrees each other, with respect to the center axis of the drive shaft to limit the bending of the drive shaft. As a method for assembling the pump equipment, the peripheral border between respective cylindrical members piled up for constituting the casing is tentatively welded by laser beam at first and, then, all around the peripheral borders are finally welded.Type: GrantFiled: May 8, 2002Date of Patent: November 11, 2003Assignee: Denso CorporationInventors: Takashi Murayama, Takeshi Fuchida, Daizo Oba
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Patent number: 6619761Abstract: In a pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other the respective reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports. The respective discharge fluid conduits, in case of the first and second pumps, are located at the points which are opposite each other, more preferably, different at an angle of 180 degrees each other, with respect to the center axis of the drive shaft to limit the bending of the drive shaft. As a method for assembling the pump equipment, the peripheral border between respective cylindrical members piled up for constituting the casing is tentatively welded by laser beam at first and, then, all around the peripheral borders are finally welded.Type: GrantFiled: June 22, 2001Date of Patent: September 16, 2003Assignee: Denso CorporationInventors: Takashi Murayama, Takeshi Fuchida, Daizo Oba
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Patent number: 6592191Abstract: In a pump equipment having one or more rotary pumps for hydraulic circuit, the intake port is communicated with the shaft hole for inserting the drive shaft and fluid flows through the shaft hole to a fluid groove provided in inner surfaces of the pump room for the purpose of lubrication. To prevent fluid leakage to outside, first and second oil seals are disposed for filling the clearance between the drive shaft and the shaft hole and, preferably, a communicating conduit is provided between the first and second oil seals to transmit the fluid leaked through the first oil seal to a low pressure fluid conduit of the hydraulic circuit. In particular, in the pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other, the reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports.Type: GrantFiled: January 3, 2002Date of Patent: July 15, 2003Assignee: Denso CorporationInventors: Takashi Murayama, Takeshi Fuchida, Daizo Oba
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Patent number: 6497310Abstract: The present invention to provides a drum brake that generates the same braking force when a vehicle moves forward and backward. A first lever is connected to a second lever by a strut. A fourth lever provided with an anchor member and a third lever for connecting the fourth lever and the first lever to the end of the fourth lever) opposite to the anchor member across a screw which is the center of swing of the fourth lever. Accordingly, when the vehicle moves forward, an anchor load is received by the anchor member and the second lever. When the vehicle moves backward, the anchor load is received by the anchor member and the first lever.Type: GrantFiled: June 21, 2001Date of Patent: December 24, 2002Assignee: Denso CorporationInventors: Takashi Murayama, Daizo Ooba, Kazuo Masaki
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Publication number: 20020125768Abstract: In a pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other the respective reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports. The respective discharge fluid conduits, in case of the first and second pumps, are located at the points which are opposite each other, more preferably, different at an angle of 180 degrees each other, with respect to the center axis of the drive shaft to limit the bending of the drive shaft. As a method for assembling the pump equipment, the peripheral border between respective cylindrical members piled up for constituting the casing is tentatively welded by laser beam at first and, then, all around the peripheral borders are finally welded.Type: ApplicationFiled: May 8, 2002Publication date: September 12, 2002Inventors: Takashi Murayama, Takeshi Fuchida, Daizo Oba
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Publication number: 20020108818Abstract: In a disk brake, a first surface of a wedge member is in line contact via a first roller bearing with a surface of the piston and a second surface of the wedge member is also in line contact via a second roller bearing with a surface of the guide member. Each of the first surface of the wedge member and the surface of the piston is perpendicular to a piston axis and each of the second surface of the wedge member and the surface of the guide member is inclined by a given angle to the piston axis. When a drive unit moves the wedge member substantially perpendicularly to the piston axis, the piston moves axially and presses a frictional material against a disk. Since force transmitted from the wedge member to the piston acts parallel to the piston axis with a less moment in a direction of pressing the piston against a wall surface of the cylindrical bore so that the piston moves smoothly.Type: ApplicationFiled: February 12, 2002Publication date: August 15, 2002Inventors: Yuzo Imoto, Takahisa Yokoyama, Takashi Murayama
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Patent number: 6393538Abstract: In order to realize duplicating of data even if a host apparatus, for example, modifies a part of commands to simplify a recovery process in the recovery process, a primary file unit issues a command similar to a writing operation directive command to a secondary file unit when accepting the write operation directive command from the host apparatus, directs to start the writing, and transfers writing start location information. Each time the primary file unit receives one of a series of write commands from the host apparatus after the writing operation directive command, the primary file unit issues a command similar to the write command to the secondary file unit to direct the writing, and transfers the data. When the write data is normally written in the secondary file unit, the primary file unit notifies the host apparatus of normal termination.Type: GrantFiled: January 24, 2001Date of Patent: May 21, 2002Assignee: Fujitsu LimitedInventor: Takashi Murayama
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Publication number: 20020053829Abstract: In a pump equipment having one or more rotary pumps for hydraulic circuit, the intake port is communicated with the shaft hole for inserting the drive shaft and fluid flows through the shaft hole to a fluid groove provided in inner surfaces of the pump room for the purpose of lubrication. To prevent fluid leakage to outside, first and second oil seals are disposed for filling the clearance between the drive shaft and the shaft hole and, preferably, a communicating conduit is provided between the first and second oil seals to transmit the fluid leaked through the first oil seal to a low pressure fluid conduit of the hydraulic circuit. In particular, in the pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other the reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports.Type: ApplicationFiled: January 3, 2002Publication date: May 9, 2002Applicant: DENSO CORPORATIONInventors: Takashi Murayama, Takeshi Fuchida, Daizo Oba, Hiroyuki Shinkai, Toshiya Morikawa
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Patent number: 6347843Abstract: In a pump equipment having one or more rotary pumps for a hydraulic circuit, the intake port is communicated with the shaft hole for inserting the drive shaft and fluid flows through the shaft hole to a fluid groove provided in inner surfaces of the pump room for the purpose of lubrication. To prevent fluid leakage to the outside, first and second oil seals are disposed for filling the clearance between the drive shaft and the shaft hole and, preferably, a communicating conduit is provided between the first and second oil seals to transmit the fluid leaked through the first oil seal to a low pressure fluid conduit of the hydraulic circuit. In particular, in the pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other, the reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports.Type: GrantFiled: April 21, 1999Date of Patent: February 19, 2002Assignee: Denso CorporationInventors: Takashi Murayama, Takeshi Fuchida, Daizo Oba, Hiroyuki Shinkai, Toshiya Morikawa
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Publication number: 20020000350Abstract: The present invention to provides a drum brake that generates the same braking force when a vehicle moves forward and backward. A first lever is connected to a second lever by a strut. A fourth lever provided with an anchor member and a third lever for connecting the fourth lever and the first lever to the end of the fourth lever) opposite to the anchor member across a screw which is the center of swing of the fourth lever. Accordingly, when the vehicle moves forward, an anchor load is received by the anchor member and the second lever. When the vehicle moves backward, the anchor load is received by the anchor member and the first lever.Type: ApplicationFiled: June 21, 2001Publication date: January 3, 2002Inventors: Takashi Murayama, Daizo Ooba, Kazuo Masaki
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Publication number: 20010048879Abstract: In a pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other the respective reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports. The respective discharge fluid conduits, in case of the first and second pumps, are located at the points which are opposite each other, more preferably, different at an angle of 180 degrees each other, with respect to the center axis of the drive shaft to limit the bending of the drive shaft. As a method for assembling the pump equipment, the peripheral border between respective cylindrical members piled up for constituting the casing is tentatively welded by laser beam at first and, then, all around the peripheral borders are finally welded.Type: ApplicationFiled: June 22, 2001Publication date: December 6, 2001Applicant: DENSO CorporationInventors: Takashi Murayama, Takeshi Fuchida, Daizo Oba
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Patent number: 6264451Abstract: In a pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other the respective reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports. The respective discharge fluid conduits, in case of the first and second pumps, are located at the points which are opposite each other, more preferably, different at an angle of 180 degrees each other, with respect to the center axis of the drive shaft to limit the bending of the drive shaft. As a method for assembling the pump equipment, the peripheral border between respective cylindrical members piled up for constituting the casing is tentatively welded by laser beam at first and, then, all around the peripheral borders are finally welded.Type: GrantFiled: April 21, 1999Date of Patent: July 24, 2001Assignee: Denso CorporationInventors: Takashi Murayama, Takeshi Fuchida, Daizo Oba
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Publication number: 20010004754Abstract: In order to realize duplicating of data even if a host apparatus, for example, modifies a part of commands to simplify a recovery process in the recovery process, a primary file unit issues a command similar to a writing operation directive command to a secondary file unit when accepting the write operation directive command from the host apparatus, directs to start the writing, and transfers writing start location information. Each time the primary file unit receives one of a series of write commands from the host apparatus after the writing operation directive command, the primary file unit issues a command similar to the write command to the secondary file unit to direct the writing, and transfers the data. When the write data is normally written in the secondary file unit, the primary file unit notifies the host apparatus of normal termination.Type: ApplicationFiled: January 24, 2001Publication date: June 21, 2001Inventor: Takashi Murayama
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Patent number: 6240470Abstract: The present invention relates to a magnetic disk control unit which can accomplish active interchange of firmwares. Thus, in this invention, a firmware constituting the magnetic disk control unit includes an internal table area for retaining various data necessary for control, a save area for temporarily saving, of the data in the internal table area, data necessary before and after interchange of the firmware while the firmware undergoes active interchange, a first interruption control section serving, as interruption handling functions, a normal function to refer to the internal table area in accordance with an interruption for advancing to processing to the interruption and a busy response function to perform a busy response to the host unit during the firmware active-interchange, and a second interruption control section serving, as an interruption handling function, only a busy response function to accomplish a busy response to the host unit during the firmware active-interchange.Type: GrantFiled: August 6, 1998Date of Patent: May 29, 2001Assignee: Fujitsu LimitedInventors: Takashi Murayama, Shigeru Sakamoto, Katsumi Murai
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Patent number: 6035690Abstract: A hog ring clamping device which clamps a hog ring such as a C ring, comprising a magazine attached around a clamping portion of a clamping device main body, jaws to deform a C ring, provided in the clamping device main body, a moving rod to open and close the jaws by linear movement, a motor provided in the clamping device main body, and a linear movement converter to convert rotation of the motor into linear movement of the moving rod.Type: GrantFiled: June 17, 1999Date of Patent: March 14, 2000Assignee: Meiho Co., LtdInventor: Takashi Murayama