Patents by Inventor Tatsuya Nagahama
Tatsuya Nagahama 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: 20240128834Abstract: A power tool includes a housing formed of two half-housings and an end cap. A stator is mounted in the housing, and a rotor including a rotor core and a permanent magnet is mounted in the stator core. A rotary shaft having an axis of rotation extending in a front-rear direction supports the rotor core. Insulators are mounted at front and rear axial ends of the stator core, a planetary gear is mounted forward of the rotor core and a handle extends from the housing. The front insulator includes two recesses, and a first portion of each recess opens radially and a second portion of each recess opens axially rearward. Portions of the stator core cover the recesses, and projections extend from the housing and respectively mate with the recesses.Type: ApplicationFiled: December 27, 2023Publication date: April 18, 2024Inventors: Tatsuya NAGAHAMA, Junya INUZUKA, Takashi MOMOSE
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Publication number: 20240106092Abstract: A battery pack may be configured to be attached to and detached from an electric device including a plurality of device-side terminals. The battery pack may include: an outer case; a battery cell; a circuit board; and a plurality of battery-side terminals. A first terminal of the plurality of battery-side terminals may include a clamp portion and a non-clamp portion. The clamp portion may be configured to receive a device-side terminal of the plurality of device-side terminals and clamp the device-side terminal from both sides. An inner surface of the clamp portion may be plated with a first metal. A part of a surface of the non-clamp portion may not be plated with the first metal. The first metal may be a pure metal that is a noble metal or a noble metal alloy.Type: ApplicationFiled: September 11, 2023Publication date: March 28, 2024Applicant: MAKITA CORPORATIONInventors: Hironori OGURA, Tatsuya NAGAHAMA
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Publication number: 20240006699Abstract: A battery pack includes a casing, a battery cell, a circuit board, an engaging member, a first biasing member biasing the engaging member upward, and a second biasing member biasing the engaging member upward. A part of the circuit board is arranged between the first biasing member and the second biasing member. The engaging member includes an engaging portion protruding to the outside of the casing. The engaging portion has an engaging surface that extends along an up-down direction and a left-right direction and engages with an electrical device. In a front-rear direction, the engaging surface is arranged rearward of a front end of the first biasing member and frontward of a rear end of the first biasing member. In the front-rear direction, the engaging surface is arranged rearward of a front end of the second biasing member and frontward of a rear end of the second biasing member.Type: ApplicationFiled: December 7, 2021Publication date: January 4, 2024Applicant: MAKITA CORPORATIONInventors: Tatsuya NAGAHAMA, Kazuya TANAKA
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Publication number: 20230336010Abstract: A power tool includes a motor and a controller in a power tool housing. A battery pack interface is defined on and/or in the power tool housing. A receptacle is defined on and/or in the power tool housing to removably accommodate a wireless communication adapter such that the wireless communication adapter is disposed entirely within a shell of the power tool and no portion of the wireless communication adapter extends beyond an outer contour of the power tool housing. At least one communication terminal is disposed within the receptacle and is electrically connectable to the wireless communication adapter. The controller outputs to the at least one communication terminal a signal indicating a charge level of a battery pack attached to the battery pack interface, a number of hours of operation of the power tool, a power tool overheated alert, and/or a battery pack overloaded alert.Type: ApplicationFiled: June 13, 2023Publication date: October 19, 2023Applicant: MAKITA CORPORATIONInventors: Nobuyasu FURUI, Hitoshi SUZUKI, Masaaki Fukumoto, Takuya UMEMURA, Kosuke ITO, Hitoshi Sengiku, Shuji Yoshikawa, Tatsuya NAGAHAMA
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Patent number: 11721990Abstract: A power tool includes a power tool housing accommodating a motor; a battery pack interface electrically connected to the motor and being configured to be physically and electrically connected to and disconnected from a power tool interface of a battery pack; and a wireless communicator configured to be attached to or detached from the power tool housing. The wireless communicator wirelessly transmits data between the power tool and an external device using radio waves. In addition, the power tool housing includes a receptacle opening configured to accommodate the wireless communicator within the power tool housing such that no part of the wireless communicator projects or protrudes beyond an outer surface or contour of the power tool housing.Type: GrantFiled: August 4, 2021Date of Patent: August 8, 2023Assignee: MAKITA CORPORATIONInventors: Nobuyasu Furui, Hitoshi Suzuki, Masaaki Fukumoto, Takuya Umemura, Kosuke Ito, Hitoshi Sengiku, Shuji Yoshikawa, Tatsuya Nagahama
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Patent number: 11715995Abstract: A power tool (1; 90) includes a motor (17) having a stator (18) and a rotor (19). The stator (18) includes front and rear insulators (21, 22) respectively disposed forward and rearward of a stator core (20) in an axial direction thereof. At least six coils (23) are respectively wound on the stator (18) such that the coils (23) are wound through the front and rear insulators (21, 22). Winding wires (23a) respectively electrically connect circumferentially-adjacent pairs of the coils (23). A short circuiting device (25) short circuits respective pairs of windings (23a) that are located diagonally or diametrically across from one another.Type: GrantFiled: December 15, 2020Date of Patent: August 1, 2023Assignee: MAKITA CORPORATIONInventors: Tatsuya Nagahama, Junya Inuzuka, Takashi Momose
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Patent number: 11695182Abstract: A battery pack (2; 602) includes: an outer case (12; 612); one or more battery cells (90a-90j); and a cell case (80), which is housed in the outer case (12; 612) and houses the battery cell(s) (90a-90j). The outer case (12; 612) has: an upper surface (wall) (14b), in which a terminal-opening part (22a) for exposing a terminal (102) is provided; a bottom wall (15e); and a plurality of side surfaces (walls) (15a-15d) extending upward from the bottom wall (15e). The battery cell(s) (90a-90j) is (are) disposed parallel to the bottom wall (15e). An opening (40a-40j) is provided in a specific side surface (15b, 15d), from among the plurality of side surfaces (15a-15d), that faces an end surface of the battery cell(s) (90a-90j) in a longitudinal direction.Type: GrantFiled: September 29, 2020Date of Patent: July 4, 2023Assignee: MAKITA CORPORATIONInventors: Akira Naito, Tatsuya Nagahama
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Patent number: 11677116Abstract: A battery pack includes: a housing (18); one or more battery cells (12) housed inside the housing; one or more seat surfaces (52a, 54a, 56a, 58a) disposed inside the housing; a circuit board (16), which is housed inside the housing and is mounted on the seat surface(s); and one or more terminals (20b, 22b) electrically connected to the circuit board. One or more elastic sheets (60, 62) surround(s) the perimeter(s) of the terminal(s) and is (are) interposed between the circuit board and the seat surface(s).Type: GrantFiled: March 19, 2020Date of Patent: June 13, 2023Assignees: MAKITA CORPORATION, MURATA MANUFACTURING CO., LTD.Inventors: Tatsuya Nagahama, Hideyuki Taga, Toshiaki Ueno, Naoki Nishi
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Patent number: 11619769Abstract: An adapter optical system, which is an optical system configured to guide reflection light reflected by an object and passing through an imaging lens to a liquid resonant lens, includes: a first lens unit removably disposed at a position where the reflection light passing through the imaging lens enters and constituting an image-side telecentric optical system; and a second lens unit disposed at a position where the reflection light passing through the first lens unit enters and constituting a finite correction optical system in combination with the liquid resonant lens.Type: GrantFiled: December 2, 2020Date of Patent: April 4, 2023Assignee: MITUTOYO CORPORATIONInventors: Tatsuya Nagahama, Yuko Shishido
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Publication number: 20220367963Abstract: A battery pack may include a battery cell; a control board disposed above the battery cell and connected to the battery cell; a plurality of terminals disposed on the control board and disposed side by side in a left-right direction; a plurality of partition wall disposed on the control board; and an outer case housing the battery cell, the control board, the plurality of terminals, and the plurality of partition walls, and having an upper surface comprising a terminal reception part configured to receive a terminal of the power tool. The plurality of terminals may include a first terminal and a second terminal adjacent to the first terminal in the left-right direction. At least two of the partition walls are disposed between the first terminal and the second terminal.Type: ApplicationFiled: September 24, 2020Publication date: November 17, 2022Applicant: MAKITA CORPORATIONInventors: Tatsuya NAGAHAMA, Minoru GYODA
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Patent number: 11467384Abstract: A telecentric optical apparatus that is capable of suppressing an increase in the number of components as well as achieving high precision optical axis alignment, is provided. The telecentric optical apparatus of the present invention is characterized in that it is provided with: a first telecentric lens surface that is provided on an object side; a second telecentric lens surface that is provided on an image side and that shares a focus position with the first telecentric lens surface; and an optical path trimming part that is provided, between the first telecentric lens surface and the second telecentric lens surface, in an outside region, which is located on a side further out than a light passing region having a center thereof located at the focus position, and that changes an optical path such that a light beam incident on the outside region is prevented from contributing to image formation.Type: GrantFiled: November 11, 2019Date of Patent: October 11, 2022Assignee: MITUTOYO CORPORATIONInventors: Kenji Okabe, Tatsuya Nagahama, Toru Yaku, Kimitoshi Ono
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Publication number: 20220181894Abstract: A detachable DC power source includes: a reference surface extending in front-rear and left-right directions; support walls protruding upward from opposite ends of the reference surface and extending in the front-rear direction; battery-side rails protruding outward in the left-right direction from the upper ends of the pair of support walls and extending in the front-rear direction; and a first battery-side distinguishing region disposed between the support walls in the left-right direction and at a connection location between the reference surface and one of the support walls. A first battery-side distinguishing member is provided in the first battery-side distinguishing region and is directly connected to the one the support walls and to the reference surface. The detachable DC power source may be used to power an electrical device having a first device distinguishing part capable of receiving the first battery distinguishing member.Type: ApplicationFiled: November 10, 2021Publication date: June 9, 2022Inventor: Tatsuya NAGAHAMA
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Patent number: 11237354Abstract: A variable focal length lens apparatus includes an objective lens and an imaging lens that are aligned on the same optical axis; a front side lens system and a rear side lens system that are disposed in a section between the objective lens and the imaging lens on the optical axis, and change a refractive index in accordance with an input drive signal; and a diaphragm disposed in the section between the front side lens system and the rear side lens system on the optical axis.Type: GrantFiled: October 16, 2018Date of Patent: February 1, 2022Assignee: MITUTOYO CORPORATIONInventors: Tatsuya Nagahama, Koji Kubo, Yuko Shishido, Masaki Okayasu, Atsushi Usami
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Patent number: 11193757Abstract: An image measurement apparatus, which functions as a non-contact profile-measuring device, includes: an image sensor as an image pick-up device; a variable focal length lens (liquid lens unit) disposed on an optical axis extending from a workpiece to the image sensor; and a controller (image-pickup lens controller and image measurement processor) configured to control the variable focal length lens and process a detected image by the image sensor. The image measurement apparatus, which also functions as a non-contact displacement-detecting device, includes: an image sensor; a variable focal length lens (liquid lens unit) disposed on an optical axis extending from the workpiece to the image sensor; and a controller (displacement-detection lens controller and profile measurement processor) configured to control the variable focal length lens and a detected image by the image sensor.Type: GrantFiled: December 17, 2019Date of Patent: December 7, 2021Assignee: MITUTOYO CORPORATIONInventors: Satoru Yoshida, Tatsuya Nagahama, Masafumi Yamanaka, Hitoshi Isobe, Naoto Oita, Koji Kubo, Yuko Shishido, Nobuo Ohba, Takahisa Ootake, Hiroki Matsui, Masanori Arai, Shiro Igasaki, Yuki Kurahashi, Hiroshi Sakai, Yutaka Watanabe
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Publication number: 20210367435Abstract: A power tool includes a power tool housing accommodating a motor; a battery pack interface electrically connected to the motor and being configured to be physically and electrically connected to and disconnected from a power tool interface of a battery pack; and a wireless communicator configured to be attached to or detached from the power tool housing. The wireless communicator wirelessly transmits data between the power tool and an external device using radio waves. In addition, the power tool housing includes a receptacle opening configured to accommodate the wireless communicator within the power tool housing such that no part of the wireless communicator projects or protrudes beyond an outer surface or contour of the power tool housing.Type: ApplicationFiled: August 4, 2021Publication date: November 25, 2021Inventors: Nobuyasu FURUI, Hitoshi SUZUKI, Masaaki Fukumoto, Takuya UMEMURA, Kosuke ITO, Hitoshi Sengiku, Shuji Yoshikawa, Tatsuya NAGAHAMA
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Patent number: 11114870Abstract: A power tool system includes a hand-held power tool having a power tool housing accommodating a motor, and a battery pack interface electrically connected to the motor within the power tool housing. A battery pack includes a battery pack housing accommodating at least one battery cell and a power tool interface electrically connected to the at least one battery cell within the battery pack housing. The power tool interface is configured to be physically and electrically connected to and disconnected from the battery pack interface of the power tool. A wireless communicator is attached to or accommodated within the battery pack housing. The wireless communicator is configured to wirelessly communicate with an external device using radio waves while the power tool interface of the battery pack is physically and electrically connected to the battery pack interface of the hand-held power tool.Type: GrantFiled: July 8, 2020Date of Patent: September 7, 2021Assignee: MAKITA CORPORATIONInventors: Nobuyasu Furui, Hitoshi Suzuki, Masaaki Fukumoto, Takuya Umemura, Kosuke Ito, Hitoshi Sengiku, Shuji Yoshikawa, Tatsuya Nagahama
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Patent number: D935996Type: GrantFiled: February 25, 2020Date of Patent: November 16, 2021Assignee: MAKITA CORPORATIONInventors: Shinsuke Okuda, Tatsuya Nagahama
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Patent number: D945959Type: GrantFiled: February 25, 2020Date of Patent: March 15, 2022Assignee: MAKITA CORPORATIONInventors: Shinsuke Okuda, Tatsuya Nagahama
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Patent number: D964270Type: GrantFiled: February 25, 2022Date of Patent: September 20, 2022Assignee: MAKITA CORPORATIONInventors: Shinsuke Okuda, Tatsuya Nagahama
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Patent number: D972497Type: GrantFiled: March 25, 2021Date of Patent: December 13, 2022Assignee: MAKITA CORPORATIONInventors: Tomonori Kawase, Tatsuya Nagahama, Kazuya Tanaka