Patents by Inventor Masaaki Eguchi
Masaaki Eguchi 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: 20230323967Abstract: Afoot valve assembly according to the present invention includes: an adapter attached to a lower opening end of a pump column configured to accommodate a pump configured to be submerged in a handling liquid, the adapter accommodating a suction port of the pump; a disc-shaped valve disc including a flow path defining surface that is located below a lower end surface of the adapter and defines an inflow path allowing the handling liquid to flow into the pump between the surfaces, the valve disc opening and closing a lower opening of the adapter; a biasing member biasing the valve disc toward the adapter; and a one-way valve disposed in the inflow path, the valve opening for fluid discharged from the lower opening depending on a pressure of the fluid and closing for the handling liquid flowing toward the lower opening when the valve disc is closed.Type: ApplicationFiled: December 23, 2022Publication date: October 12, 2023Inventors: Yasuo TOMITA, Motoyasu OGAWA, Masaaki EGUCHI
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Publication number: 20230265933Abstract: A foot valve assembly according to the present invention includes: a cylindrical adapter attached to a lower opening end of a cylindrical pump column configured to accommodate a pump configured to be submerged in a handling liquid, the adapter configured to accommodate a suction port of the pump; a disc-shaped valve disc configured to open and close a lower opening of the adapter corresponding to raising and lowering of the pump; a biasing member that biases the valve disc toward the adapter; and an auxiliary valve configured to open and close corresponding to the raising and lowering of the pump and configured to assist in opening the valve disc when the valve disc is closed.Type: ApplicationFiled: January 20, 2023Publication date: August 24, 2023Inventors: Yasuo TOMITA, Motoyasu OGAWA, Masaaki EGUCHI
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Patent number: 11728701Abstract: This canned motor (10) is provided with a rotor (14); a cylindrical rotor can (42) that houses the rotor (14); an end plate (40) that covers an opening of the rotor can (42) in the axial direction and is joined to the rotor can (42); a rotating shaft (16) that passes through the rotor (14) and the end plate (40); and an annular wall (46) that surrounds the outer circumference of the rotating shaft (16), is joined to or integrated with the end plate (40), and is joined to the entire circumference of the rotating shaft (16) at an end thereof in the axial direction. The thickness of the end plate (40) is larger than the thickness of the annular wall (46).Type: GrantFiled: July 18, 2019Date of Patent: August 15, 2023Assignee: NIKKISO CO., LTD.Inventors: Kazuo Futatsugi, Osamu Watanabe, Yasushi Kubota, Yu Kodama, Masaaki Eguchi
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Publication number: 20230204043Abstract: A sealing member according to the present invention includes a head plate having a through hole and attached to an opening end of a pump column, a lift shaft penetrating the through hole and raised and lowered between a raised position and a lowered position in raising and lowering the pump, and a bellows member extending and contracting corresponding to the raising and lowering of the lift shaft. The bellows member includes a bellows tube covering an outer peripheral surface of a protruding portion of the lift shaft protruding upward from the head plate, a first attaching member disposed contiguously to an upper end of the bellows tube and attached to an upper end surface of the lift shaft, and a second attaching member disposed contiguously to a lower end of the bellows tube and attached to an upper surface of the head plate.Type: ApplicationFiled: December 20, 2022Publication date: June 29, 2023Inventors: Yasuo TOMITA, Motoyasu OGAWA, Masaaki EGUCHI
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Publication number: 20230204036Abstract: A sealing member according to the present invention includes a head plate having a through hole and attached to an opening end of a pump column, a lift shaft penetrating the through hole and raised and lowered between a raised position and a lowered position in raising and lowering the pump, and a bellows member extending and contracting corresponding to the raising and lowering of the lift shaft. The bellows member includes a bellows tube covering an outer peripheral surface of a protruding portion of the lift shaft protruding downward from the head plate, a first attaching member disposed contiguously to a lower end of the bellows tube and attached to a protruding lower portion, and a second attaching member disposed contiguously to an upper end of the bellows tube and attached to a lower surface of the head plate.Type: ApplicationFiled: December 20, 2022Publication date: June 29, 2023Inventors: Yasuo TOMITA, Motoyasu OGAWA, Masaaki EGUCHI
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Publication number: 20210376675Abstract: This canned motor (10) is provided with a rotor (14); a cylindrical rotor can (42) that houses the rotor (14); an end plate (40) that covers an opening of the rotor can (42) in the axial direction and is joined to the rotor can (42); a rotating shaft (16) that passes through the rotor (14) and the end plate (40); and an annular wall (46) that surrounds the outer circumference of the rotating shaft (16), is joined to or integrated with the end plate (40), and is joined to the entire circumference of the rotating shaft (16) at an end thereof in the axial direction. The thickness of the end plate (40) is larger than the thickness of the annular wall (46).Type: ApplicationFiled: July 18, 2019Publication date: December 2, 2021Applicant: NIKKISO CO., LTD.Inventors: Kazuo FUTATSUGI, Osamu WATANABE, Yasushi KUBOTA, Yu KODAMA, Masaaki EGUCHI
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Patent number: 10882503Abstract: An electromechanical brake system includes a linear motion mechanism configured to convert the rotation transmitted from the electric motor to a linear motion, thereby pressing a friction pad against a brake disk; a linear motion mechanism housing in which the linear motion mechanism is received as a single assembly with the components of the linear motion mechanism assembled together; and a caliper body shaped to extend across the outer periphery of the brake disk. The caliper body includes a claw portion axially supporting a friction pad; a housing-fixing plate which is arranged on the side of the linear motion mechanism housing opposite from the brake disk; and an outer shell portion through which the claw portion and the housing-fixing plate are coupled together.Type: GrantFiled: July 27, 2016Date of Patent: January 5, 2021Assignee: NTN CORPORATIONInventor: Masaaki Eguchi
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Patent number: 10816052Abstract: An electromechanical brake system includes a caliper body having a housing portion in which is received a linear motion mechanism for pressing a brake pad against a brake disk. A boot is coupled at its one end to an outer ring member of the linear motion mechanism, and at its other end to a support ring. The support ring abuts and is mechanically and fixedly fastened to an open end surface of the housing portion to close the open end of housing portion with the support ring and the boot.Type: GrantFiled: February 3, 2017Date of Patent: October 27, 2020Assignee: NTN CORPORATIONInventor: Masaaki Eguchi
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Patent number: 10508722Abstract: An electric linear motion actuator is provided which includes an outer ring member, a rotary shaft, planetary rollers, and a carrier including a disk, and in which the outer ring member is formed with a helical rib, each of the planetary rollers being formed with circumferential grooves in which the helical rib is engaged. When the rotary shaft rotates, the planetary rollers rotate about their axes while revolving around the rotary shaft so that the outer ring member axially linearly moves. The actuator includes thrust roller and retainer assemblies each mounted between one of the planetary roller and the disk of the carrier, and each guided by a raceway, i.e., an end surface of the corresponding planetary roller. The actuator includes a common raceway disk common to all of the thrust roller and retainer assemblies, and mounted between the thrust roller and retainer assemblies and the disk of the carrier.Type: GrantFiled: November 4, 2015Date of Patent: December 17, 2019Assignee: NTN CORPORATIONInventors: Tatsuya Yamasaki, Masaaki Eguchi
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Publication number: 20190063529Abstract: An electromechanical brake system includes a caliper body having a housing portion in which is received a linear motion mechanism for pressing a brake pad against a brake disk. A boot is coupled at its one end to an outer ring member of the linear motion mechanism, and at its other end to a support ring. The support ring abuts and is mechanically and fixedly fastened to an open end surface of the housing portion to close the open end of housing portion with the support ring and the boot.Type: ApplicationFiled: February 3, 2017Publication date: February 28, 2019Applicant: NTN CORPORATIONInventor: Masaaki EGUCHI
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Publication number: 20180313438Abstract: An electric linear motion actuator is provided which includes an outer ring member, a rotary shaft, planetary rollers, and a carrier including a disk, and in which the outer ring member is formed with a helical rib, each of the planetary rollers being formed with circumferential grooves in which the helical rib is engaged. When the rotary shaft rotates, the planetary rollers rotate about their axes while revolving around the rotary shaft so that the outer ring member axially linearly moves. The actuator includes thrust roller and retainer assemblies each mounted between one of the planetary roller and the disk of the carrier, and each guided by a raceway, i.e., an end surface of the corresponding planetary roller. The actuator includes a common raceway disk common to all of the thrust roller and retainer assemblies, and mounted between the thrust roller and retainer assemblies and the disk of the carrier.Type: ApplicationFiled: November 4, 2015Publication date: November 1, 2018Applicant: NTN CORPORATIONInventors: Tatsuya YAMASAKI, Masaaki EGUCHI
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Patent number: 10086815Abstract: An electric brake device includes an electric motor; a braking force application mechanism configured to apply a braking force on a vehicle wheel; a lock mechanism configured to assume one of a locked condition; a temperature sensor configured to measure an ambient temperature of a vehicle; and a freezing preventive power supply unit configured to initiate supply of an electric power to the electric motor or a drive source of the lock mechanism. The freezing preventive power supply unit interrupts the supply of the electric power to the electric motor or the drive source of the lock mechanism when the temperature detected by the temperature sensor exceeds a second preset temperature T2 that is higher than a first preset temperature T1.Type: GrantFiled: June 14, 2016Date of Patent: October 2, 2018Assignee: NTN CORPORATIONInventors: Makoto Muramatsu, Yuuki Saoyama, Tatsuya Yamasaki, Masaaki Eguchi, Yui Masuda
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Publication number: 20180273010Abstract: An electromechanical brake system includes a linear motion mechanism configured to convert the rotation transmitted from the electric motor to a linear motion, thereby pressing a friction pad against a brake disk; a linear motion mechanism housing in which the linear motion mechanism is received as a single assembly with the components of the linear motion mechanism assembled together; and a caliper body shaped to extend across the outer periphery of the brake disk. The caliper body includes a claw portion axially supporting a friction pad; a housing-fixing plate which is arranged on the side of the linear motion mechanism housing opposite from the brake disk; and an outer shell portion through which the claw portion and the housing-fixing plate are coupled together.Type: ApplicationFiled: July 27, 2016Publication date: September 27, 2018Applicant: NTN CORPORATIONInventor: Masaaki EGUCHI
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Patent number: 9574630Abstract: An electric linear motion actuator includes planetary rollers mounted between the radially inner surface of an outer ring member and the radially outer surface of a rotary shaft, and a carrier rotatable about the rotary shaft and including radially movable roller shafts rotatably supporting the respective planetary rollers. Elastic rings each having circumferentially separate ends are each wrapped around the roller shafts to radially inwardly bias the roller shafts, thereby bringing the respective planetary rollers into elastic contact with the radially outer surface of the rotary shaft. Each elastic ring is prevented from rotating relative to the roller shafts, thereby preventing one of the roller shafts from being axially aligned with the gap between the circumferential separate ends, causing the elastic ring to be radially compressed and thus making it impossible for the elastic rings to radially bias the roller shafts.Type: GrantFiled: October 8, 2015Date of Patent: February 21, 2017Assignee: NTN CorporationInventors: Makoto Muramatsu, Masaaki Eguchi, Tatsuya Yamasaki, Tomomi Goto
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Publication number: 20160288778Abstract: An electric brake device includes an electric motor; a braking force application mechanism configured to apply a braking force on a vehicle wheel; a lock mechanism configured to assume one of a locked condition; a temperature sensor configured to measure an ambient temperature of a vehicle; and a freezing preventive power supply unit configured to initiate supply of an electric power to the electric motor or a drive source of the lock mechanism. The freezing preventive power supply unit interrupts the supply of the electric power to the electric motor or the drive source of the lock mechanism when the temperature detected by the temperature sensor exceeds a second preset temperature T2 that is higher than a first preset temperature T1.Type: ApplicationFiled: June 14, 2016Publication date: October 6, 2016Applicant: NTN CORPORATIONInventors: Makoto MURAMATSU, Yuuki SAOYAMA, Tatsuya YAMASAKI, Masaaki EGUCHI, Yui MASUDA
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Patent number: 9435411Abstract: A linear motion actuator includes an outer ring member mounted in a housing, a rotary shaft rotated by a motor, planetary rollers mounted between the outer ring member and the shaft and supported by a carrier rotatable about the shaft. A helical rib is formed on the inner surface of the outer ring member which is engaged in helical grooves formed in outer surfaces of the planetary rollers. When the shaft rotates, the planetary rollers rotate and revolve, thereby axially moving the outer ring member. Uneven axial loads applied to the planetary rollers from the outer ring member are supported by thrust bearings disposed between the planetary rollers and an inner disk of the carrier. Aligning seats are provided between each opposed pair of the planetary rollers and the thrust bearings such that the contact surfaces of the aligning seats shift relative to each other under the uneven axial loads.Type: GrantFiled: January 12, 2012Date of Patent: September 6, 2016Assignee: NTN CORPORATIONInventors: Masaaki Eguchi, Makoto Muramatsu, Tatsuya Yamasaki, Makoto Yasui
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Patent number: 9421959Abstract: An electric brake device includes an electric motor, a braking force application mechanism, a lock mechanism, a temperature sensor for measuring an ambient temperature of a vehicle in which the electric brake device is provided, and a freezing preventive power supply unit. The freezing preventive power supply unit initiates the supply of an electric power to the electric motor or a drive source of the lock mechanism in the event that while the braking force application mechanism applies a braking force and the lock mechanism is held in a locked condition, the temperature sensor detects a preset temperature of the electric brake device immediately before freezing.Type: GrantFiled: August 7, 2012Date of Patent: August 23, 2016Assignee: NTN CORPORATIONInventors: Makoto Muramatsu, Yuuki Saoyama, Tatsuya Yamasaki, Masaaki Eguchi, Yui Masuda
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Patent number: 9369024Abstract: A linear motion actuator has an output member that can be smoothly moved linearly even when lateral moment acts on the output member. A carrier (6) supporting planetary rollers (7) is axially immovable, while an outer ring member (5), as the output member, is axially slidably fitted in the radially inner surface of a cylindrical portion (1a) of a housing (1), and is rotationally fixed to a driven member through keys (22). Hard plating layers are formed on the radially outer surface of a rotary shaft (4), the radially outer surfaces of the planetary rollers (7), including helical grooves (7a), and the surface of a helical rib member (5b) which is fixed to the radially inner surface of the outer ring member (5) forming a helical rib.Type: GrantFiled: February 14, 2011Date of Patent: June 14, 2016Assignee: NTN CORPORATIONInventors: Tatsuya Yamasaki, Masaaki Eguchi
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Patent number: 9353837Abstract: An electric linear motion actuator includes: a rotary shaft to be driven by an electric motor; a plurality of planetary rollers kept in rolling contact with a cylindrical surface formed on an outer periphery of the rotary shaft; a carrier which retains the planetary rollers such that the planetary rollers are rotatable about axes thereof while revolving around the rotary shaft, and of which axial movement is restricted; and an outer ring member surrounding the planetary rollers and supported so as to be slidable in an axial direction. Helical ribs are formed on an inner periphery of the outer ring member; and circumferential grooves are formed on an outer periphery of each of the planetary rollers so as to be engaged with the helical ribs. A rotation of the rotary shaft is thus converted to a linear motion of the outer ring member.Type: GrantFiled: October 31, 2012Date of Patent: May 31, 2016Assignee: NTN CORPORATIONInventors: Tatsuya Yamasaki, Yui Masuda, Makoto Muramatsu, Masaaki Eguchi, Yuki Saoyama
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Publication number: 20160025170Abstract: An electric linear motion actuator includes planetary rollers mounted between the radially inner surface of an outer ring member and the radially outer surface of a rotary shaft, and a carrier rotatable about the rotary shaft and including radially movable roller shafts rotatably supporting the respective planetary rollers. Elastic rings each having circumferentially separate ends are each wrapped around the roller shafts to radially inwardly bias the roller shafts, thereby bringing the respective planetary rollers into elastic contact with the radially outer surface of the rotary shaft. Each elastic ring is prevented from rotating relative to the roller shafts, thereby preventing one of the roller shafts from being axially aligned with the gap between the circumferential separate ends, causing the elastic ring to be radially compressed and thus making it impossible for the elastic rings to radially bias the roller shafts.Type: ApplicationFiled: October 8, 2015Publication date: January 28, 2016Applicant: NTN CORPORATIONInventors: Makoto MURAMATSU, Masaaki EGUCHI, Tatsuya YAMASAKI, Tomomi GOTO