Patents Assigned to KOKI HOLDINGS CO., LTD.
  • Electric tool
    Patent number: 11418094
    Abstract: Providing an electric tool with excellent cooling efficiency. An electric tool includes: a housing 2; a motor 3; a fan 34; a sensing portion 41; a switching portion 42; and a circuit board 40. The motor 3 is accommodated in the housing 2. The motor 3 includes a stator 33, a rotor 32, and a rotating shaft 31. The rotor 32 is rotatable relative to the stator 33. The rotating shaft 31 is rotatable together with the rotor 32. The fan 34 is configured to generate a cooling air flow inside the housing 2. The sensing portion 41 is configured to detect a rotated position of the rotor 32. The switching portion 41 controls a rotation of the rotor 32. The sensing portion 41 and the switching portion 42 are mounted on the circuit board 40.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: August 16, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Akira Matsushita, Tomomasa Nishikawa, Yuta Noguchi, Takahiro Hirai
  • Battery pack, power tool, and battery pack and power tool set
    Patent number: 11411277
    Abstract: The purpose of the invention is to provide a battery pack and a power tool on which the same can be detachably mounted such that compatibility can be ensured even if the dimensions of the battery cells therefor are changed, as well as a battery pack and power tool set. A second battery pack is provided with second battery cells, a second case which houses the second battery cells, a second latch portion for mounting the second battery pack to the power tool, and a second latch operating portion. The second battery pack has a larger case width than that of a specified battery pack for housing battery cells shorter than the second battery cells. However, as the rail width is the same, the second battery pack can be detachably mounted to the power tool in place of the specified battery pack.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: August 9, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Tomomasa Nishikawa, Satoru Matsuno, Mitsutaka Sakamoto
  • VACUUM CLEANER
    Publication number: 20220240741
    Abstract: Provided is a vacuum cleaner comprising: a main body housing 10 which houses a motor and a fan and which has an intake by which an airflow created by the fan enters inside; and a dust collection unit which is attachable to and detachable from the main body housing 10 so as to cover the intake. The main body housing 10 has an attachment-receiving part 30 with a common shape such that a cyclonic dust collection unit 50 which separates fine particles using a cyclonic air flow and a dust collection unit which carries out dust collection by filtration without using centrifugal force can be interchangeably attached to and detached from the main body housing as the dust collection unit.
    Type: Application
    Filed: June 26, 2020
    Publication date: August 4, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Naoto ICHIHASHI, Hiroyuki TAGAMI
  • POWER TOOL
    Publication number: 20220241877
    Abstract: Provided is a power tool capable of suitably fixing an auxiliary member to a base pedestal. The power tool has a base 30 having a sliding surface capable of sliding on a workpiece, and an auxiliary member 60 that is attachable to the base 30 and has a guiding surface 61. The power tool also has a wing bolt 33 and a leaf spring 35 as a pressing mechanism capable of pressing an extension part 62 of the auxiliary member 60. An operator can change a pressing force of the wing bolt 33 to the auxiliary member 60 by changing the position of the wing bolt 33 in a pressing direction. The leaf spring 35 applies a predetermined pressing force to the auxiliary member 60 even in the absence of the pressing force of the wing bolt 33 to the auxiliary member 60.
    Type: Application
    Filed: June 26, 2020
    Publication date: August 4, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Yoshiaki Osada, Shinji Kuragano, Takeru Kumakura
  • BATTERY PACK AND ELECTRIC DEVICE
    Publication number: 20220223949
    Abstract: A battery pack includes: a connection terminal group including a positive electrode terminal and a negative electrode terminal, which are connected to a battery cell; a wireless communication unit for performing a wireless communication with an external device; a wireless control circuit for controlling the wireless communication unit; and a circuit board on which the wireless communication unit is mounted. The wireless communication unit includes an antenna wire that is extended along the surface of the circuit board; a rubber sheet member is provided so as to cover the upper surface of the wireless communication unit; and a resin layer is formed so as to cover a soldered portion of an electronic element that is mounted in a region of the circuit board other than the rubber sheet member. The rubber sheet member is provided with a notch so as to expose the antenna wire portion to the outside.
    Type: Application
    Filed: May 15, 2020
    Publication date: July 14, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Toshiaki Masumori, Satoshi Yamaguchi, Hiroyuki Hanawa
  • DC POWER SUPPLY DEVICE
    Publication number: 20220216799
    Abstract: A DC power supply device includes a first conversion unit connected to an AC power supply, a second conversion unit connected to an electric tool, and a cable connecting the first conversion unit and the second conversion unit to each other. The first conversion unit includes a power factor correction circuit, converts an AC voltage having a first voltage value, input from the AC power supply, into a DC voltage having a second voltage value higher than the first voltage value, and outputs the DC voltage having the second voltage value to the cable. The second conversion unit converts the output voltage of the first conversion unit, input via the cable, into a DC voltage having a third voltage value lower than the second voltage value, and outputs the DC voltage having the third voltage value to the electric tool.
    Type: Application
    Filed: June 28, 2019
    Publication date: July 7, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Takuya YOSHINARI, Yuji KISHIMA, Eiji NAKAYAMA, Kazuhiko FUNABASHI, Haruhisa FUJISAWA
  • Battery pack and electric apparatus using battery pack
    Patent number: 11367907
    Abstract: A battery pack includes cell units in which upper and lower battery cells are connected in series, wherein an output of series-connection and an output of parallel-connection can be switched. The cell units are respectively provided with protection circuit ICs for monitoring the state of the battery cells, and only the protection circuit on the lower cell unit side is provided with a controller 350 including a microcomputer. To adjust the power consumption for the microcomputer only provided in the lower cell unit, the circuit on the upper cell unit side is provided with a current consumption control means including dummy loads. The current consumption control means is operated in conjunction with the start-up of the microcomputer in the controller so as to equalize power consumption on the upper cell unit side and the lower cell unit side.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: June 21, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Yasushi Nakano, Satoshi Yamaguchi, Hiroyuki Hanawa, Kazuhiko Funabashi, Tomomasa Nishikawa, Shota Kanno, Toshio Mizoguchi, Takuya Teranishi
  • Portable power supply
    Patent number: 11368029
    Abstract: There is provided a battery power pack and power tool system, including at least first and second power tools operational with a first voltage supply level and a second power voltage supply level respectively. The battery pack is selectively mechanically and electrically connectable with each of the said power tools to provide power thereto and the first power tool includes electrical connection means in a first configuration to provide the power from the battery pack for the operation of said first power tool at the said first voltage supply level and the second power tool includes electrical connection means in a second configuration to provide the power from the battery pack for the operation of said second power tool at the said second voltage supply level such that the same battery pack is used to supply different required voltage supply levels for the respective power tools.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: June 21, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventor: Rients Bakker
  • ELECTRIC DEVICE
    Publication number: 20220181969
    Abstract: An electric device is provided which can reduce risk of malfunction. This electric device is provided with a motor (31), an inverter circuit (30) which has switching elements (S1-S6) and which drives the motor (31), and a charge pump circuit (22) which generates the drive voltage of the switching elements (S1-S6). A discharge circuit (a discharge resistor R and a capacitor C1) is provided between a power line to which a drive voltage (VM) of the motor (31) is supplied and an output terminal (a VGT terminal) of the charge pump circuit (22). Energy of the surge voltage (Vs) generated in a parasitic inductance (Ls) when the switching elements (S4-S6) are turned off is absorbed by the discharge circuit (the discharge resistor R and the capacitor C1).
    Type: Application
    Filed: March 27, 2020
    Publication date: June 9, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventor: Shinya TOYODA
  • Driving machine
    Patent number: 11331779
    Abstract: The disclosure discloses a driving machine includes a trigger, a first switch turned on or off by an operation of the trigger, a push lever that moves in response to an operation of pressing an ejection port of a fastener against a driven material, and a second switch turned on or off by movement of the push lever. The driving machine drives the fastener when the first switch and the second switch are both in the ON state. The trigger includes a switching mechanism to switch between a single-shot driving mode and a continuous-shot driving mode.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: May 17, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Yoshimitsu Iijima, Hiroki Kitagawa
  • CLEANER
    Publication number: 20220125267
    Abstract: As a result of the rotation of a fan (65) driven by a motor (40) inside a housing (2), dust-laden air that has been sucked in from a nozzle (92) passes through a filter device (95), flows as in (C1, C2), and is discharged from a discharge port (30) to the outside of the housing (2). Viewed in the direction of the axis (A1) of the motor (40): an air intake port (10) is located in front of the motor (40); a battery pack (100) is located behind the motor (40); and a handle (4) is located behind the motor (40). The air exhaust port (30) is located between the handle (4) and the battery pack (100) and is provided behind the center position of the battery pack (100) in the axis (A1) direction.
    Type: Application
    Filed: November 29, 2019
    Publication date: April 28, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Hiroyuki TAGAMI, Naoto ICHIHASHI
  • CHARGING DEVICE
    Publication number: 20220123569
    Abstract: A charging device (1) includes: a case (4) to which a battery pack is detachably attached; a charging circuit portion that charges the battery pack; a fan (30) for cooling; a first opening portion (5) for intake; and a second opening portion (6) for exhaust. An air path from the fan (30) to the second opening portion (6) is connected by an air path forming portion (33) having a long and curved passage length. The air path forming portion (33) narrows down at a point in the middle to achieve a positional relationship in which the fan (30) cannot be seen from the second opening portion (6), thereby making it difficult for operating noise of the fan (30) to leak to the outside. The air path forming portion (33) is formed using a wall surface of the case (4), an outer air-guiding wall (34), and an inner air-guiding wall (35).
    Type: Application
    Filed: January 31, 2020
    Publication date: April 21, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Mikihiro KATAOKA, Naoto ICHIHASHI
  • WORKING MACHINE
    Publication number: 20220118596
    Abstract: A working machine includes a housing, a motor, an operating part, and an on-locking unit. The motor is accommodated in the housing. The operating part is a part of the housing. The operating part is movable between an on position and an off position. The motor is driven when the operating part is in the on position, and is stopped when the operating part is in the off position. The on-locking element is configured to maintain the operating part in the on position. At least a portion of the on-locking element is accommodated inside of the housing so as not to be operable when the operating part is in the off position. The portion of the on-locking unit is positioned outside of the housing such that the on-locking unit becomes operable when the operating part is in the on position.
    Type: Application
    Filed: October 25, 2019
    Publication date: April 21, 2022
    Applicant: KOKI HOLDINGS CO., LTD.
    Inventor: Kentaro HATAKEYAMA
  • BATTERY PACK AND ELECTRIC DEVICE SYSTEM
    Publication number: 20220094178
    Abstract: The battery pack includes: a battery cell group; a control unit; and a battery-side LD terminal The battery-side LD terminal common to the output of a charging prohibition signal and the output of a discharging prohibition signal is used. When charging is performed, the control unit does not output, to the battery-side LD terminal, the result of determining whether the battery cell group is in a discharging prohibition state or not, but outputs, to the battery-side LD terminal, the result of determining whether the battery cell group is in a charging prohibition state or not. Otherwise, the control unit does not output, to the battery-side LD terminal, the result of determining whether the battery cell group is in the charging prohibition state or not, but outputs, to the battery-side LD terminal, the result of determining whether the battery cell group is in the discharging prohibition state or not.
    Type: Application
    Filed: October 25, 2019
    Publication date: March 24, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Satoshi YAMAGUCHI, Satoshi YOSHIKAWA, Hiroyuki HANAWA, Kazuhiko FUNABASHI
  • Driving machine
    Patent number: 11273545
    Abstract: There is provided a driving machine capable of reducing a load applied to a guide member in a direction of a center axis. The driving machine drives a fastener into a workpiece. The driving machine includes a movable piston, a driver blade operating together with the piston and applying driving force to the fastener, a cylinder guiding operation of the piston, a holder provided in a housing and supporting the cylinder, and a vibration damping rubber interposed between the holder and the housing and receiving a load applied to the holder in an operational direction of the piston.
    Type: Grant
    Filed: August 3, 2021
    Date of Patent: March 15, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventor: Takashi Ueda
  • WORKING MACHINE
    Publication number: 20220072638
    Abstract: A front grease retention unit is provided under a front plunger and a wall is provided between the retention unit and a gear accommodation unit. Furthermore, a front grease receiving member is provided under the front plunger and a front metal bearing, and grease falling into the front grease receiving member is sent toward the outer circumferential face of the front plunger. The grease is pushed out by using the vertical oscillation of a front metal anchor bolt in orbital mode. A rear grease receiving member is provided under a rear plunger and a rear metal bearing, and grease falling into the rear grease receiving member is sent toward the outer circumferential face of the rear plunger. The grease in a grease reservoir groove is pushed out by using the vertical oscillation of a rear metal anchor bolt in orbital mode.
    Type: Application
    Filed: November 29, 2019
    Publication date: March 10, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Ryosuke NAKANO, Yoshikazu YOKOYAMA, Ken INUI
  • Drive-in machine
    Patent number: 11267116
    Abstract: The present invention is to prevent a drive-in position of a fastening member with respect to a material to be driven from being shifted. The drive-in machine according to the present invention comprises: an operation member; a contact member; a striking portion; and a first pressure chamber, the drive-in machine further comprising: a valve element for opening and closing a first passage through which a compressed fluid is sent to the first pressure chamber; a control mechanism having a first state and a second state in which the valve element is controlled; and a restriction mechanism for allowing and restricting the switching between the first state and the second state of the control mechanism. The restriction mechanism has first and second functions for allowing or restricting the control mechanism to be switched from the second state to the first state according to a time from a reference time point.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: March 8, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Masaaki Furumi, Masashi Nishida
  • Working machine
    Patent number: 11229997
    Abstract: In order to provide a working machine capable of suppressing an increase in size, a working machine that rotates a working tool with motive power of a motor includes a transmission mechanism that transmits a rotational force of the motor to the working tool, a front case in which the transmission mechanism is disposed, a holding tool that is attached to the front case so as to protrude from an outer surface of the case and is gripped by a worker, and an attaching hole which is provided in the front case and to which the holding tool is attached, and the attaching hole penetrates the front case in plan view intersecting with an axis that is a rotation center of the working tool.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: January 25, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Shota Hirano, Hiroyuki Hanawa, Keita Saitou, Naoki Sato
  • Fastening tool
    Patent number: 11229996
    Abstract: A fastening tool is provided, wherein a relief valve piston (65) is arranged that blocks an air passage from an air plug (58) to an accumulator chamber (50) and that opens/closes a flow path of a discharge port of compressed air from the accumulator chamber (50) to the atmosphere. When a state in which a trigger lever (21) is pulled while a push lever is released continues for a prescribed time or longer, a portion of the compressed air in the accumulator chamber (50) is released to the outside from the discharge port to notify the operator that the trigger lever (21) has not returned. If the trigger lever (21) is not returned even after the notification, the compressed air in the accumulator chamber (50) is discharged to the atmosphere at once and an air passage from an air plug (58) to the accumulator chamber (50) is blocked.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: January 25, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventor: Masaya Nagao
  • Band saw
    Patent number: D951735
    Type: Grant
    Filed: August 23, 2020
    Date of Patent: May 17, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Takeshi Taniguchi, Shinichi Kakefuda, Masahiro Fujiwara, Tomohiro Ejiri