Patents by Inventor Fumitoshi Numata

Fumitoshi Numata 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).

  • Patent number: 11951504
    Abstract: An electric blower is configured to blow air. The blower includes a body configured such that a sprayer attachment is attachable thereto. The body is configured to be carried integrally with the sprayer attachment with the sprayer attachment attached to the body. The sprayer attachment includes a container, a nozzle and a liquid supply passage. The container is configured to store a liquid. The nozzle has a discharge opening. The liquid supply passage is connected to the container and the nozzle to lead the liquid.
    Type: Grant
    Filed: March 2, 2022
    Date of Patent: April 9, 2024
    Assignee: MAKITA CORPORATION
    Inventor: Fumitoshi Numata
  • Patent number: 11946484
    Abstract: A blower includes a motor, a plurality of fans coaxially arranged in multiple stages, a housing having an inlet opening and a discharge opening, and a battery mounting part to which a battery is removably mountable. A rotational speed of the motor is within a range of 50,000 rpm to 120,000 rpm. A diameter of each of the fans is within a range of 30 mm to 70 mm. An area of the discharge opening is within a range of not less than an area of a circle having a diameter of 2.5 mm and not more than an area of a circle having a diameter of 10 mm. A blowing force of air discharged through the discharge opening is within a range of 1 N to 3 N.
    Type: Grant
    Filed: July 13, 2021
    Date of Patent: April 2, 2024
    Assignee: MAKITA CORPORATION
    Inventors: Akira Ojima, Fumitoshi Numata
  • Publication number: 20240017369
    Abstract: To reduce wasteful power consumption and noise generation, a control circuit drives a motor in response to a switch being turned on after a handle detector detects attachment of an auxiliary handle and a handle gripping detector detects gripping of the auxiliary handle, controls the motor to rotate at a predetermined first rotational speed in response to the switch being turned on with the attachment and the gripping of the auxiliary handle being detected, and controls the motor to rotate at a second rotational speed lower than the first rotational speed in response to a state of a load on a tip tool being unchanged for a predetermined period of time.
    Type: Application
    Filed: May 15, 2023
    Publication date: January 18, 2024
    Applicant: MAKITA CORPORATION
    Inventor: Fumitoshi NUMATA
  • Publication number: 20240011502
    Abstract: A blower includes a body having a main inlet opening and a discharge opening, a motor assembly housed in the body, and an auxiliary inlet opening. The motor assembly includes a case, a motor and a fan. The case has a first opening and a second opening. The motor is housed within the case. The fan is configured to rotate in response to driving of the motor to generate a flow of air passing the main inlet opening, the first opening, the motor, the second opening and the discharge opening in this order. A first space that communicates with the main inlet opening and the first opening of the case is formed within the body. The auxiliary inlet opening is configured to introduce the air from an outside of the body into the first space.
    Type: Application
    Filed: September 20, 2023
    Publication date: January 11, 2024
    Applicant: MAKITA CORPORATION
    Inventors: Fumitoshi NUMATA, Takumi HAYASHI
  • Publication number: 20240003360
    Abstract: A blower includes a body, a motor, and a single fan configured to rotate in response to rotation of a motor shaft to discharge air through a discharge opening. The maximum rotational speed of the motor shaft is within a range of 50,000 rpm to 120,000 rpm. An area of the discharge opening is changeable by a user. The blower is configured to selectively operate in a first mode or in a second mode according to the area of the discharge opening. In the first mode, the maximum blowing force of the air discharged through the opening is within a range of 2.5 N to 5.0 N when the motor is driven at the maximum rotational speed. In the second mode, the maximum dynamic pressure of the air discharged is within a range of 30 kPa to 65 kPa when the motor is driven at the maximum rotational speed.
    Type: Application
    Filed: September 15, 2023
    Publication date: January 4, 2024
    Applicant: MAKITA CORPORATION
    Inventor: Fumitoshi NUMATA
  • Patent number: 11846291
    Abstract: A blower includes a blower body and a nozzle. The blower body includes a housing having an inlet opening, a motor housed in the housing and at least one fan housed in the housing. The nozzle is connected to the blower body and extends in an axial direction. The nozzle has a discharge opening formed in its one end in the axial direction and at least one vent hole formed in a different position from the discharge opening.
    Type: Grant
    Filed: September 2, 2021
    Date of Patent: December 19, 2023
    Assignee: MAKITA CORPORATION
    Inventor: Fumitoshi Numata
  • Patent number: 11802573
    Abstract: A blower includes a body having a main inlet opening and a discharge opening, a motor assembly housed in the body, and an auxiliary inlet opening. The motor assembly includes a case, a motor and a fan. The case has a first opening and a second opening. The motor is housed within the case. The fan is configured to rotate in response to driving of the motor to generate a flow of air passing the main inlet opening, the first opening, the motor, the second opening and the discharge opening in this order. A first space that communicates with the main inlet opening and the first opening of the case is formed within the body. The auxiliary inlet opening is configured to introduce the air from an outside of the body into the first space.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: October 31, 2023
    Assignee: MAKITA CORPORATION
    Inventors: Fumitoshi Numata, Takumi Hayashi
  • Patent number: 11795967
    Abstract: A blower includes a body, a motor, and a single fan configured to rotate in response to rotation of a motor shaft to discharge air through a discharge opening. The maximum rotational speed of the motor shaft is within a range of 50,000 rpm to 120,000 rpm. An area of the discharge opening is changeable by a user. The blower is configured to selectively operate in a first mode or in a second mode according to the area of the discharge opening. In the first mode, the maximum blowing force of the air discharged through the opening is within a range of 2.5 N to 5.0 N when the motor is driven at the maximum rotational speed. In the second mode, the maximum dynamic pressure of the air discharged is within a range of 30 kPa to 65 kPa when the motor is driven at the maximum rotational speed.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: October 24, 2023
    Assignee: MAKITA CORPORATION
    Inventor: Fumitoshi Numata
  • Publication number: 20230330808
    Abstract: A grinding tool facilitates wiring between a detector for an auxiliary handle and a controller. A grinding tool includes a motor, a housing including an inner housing accommodating the motor and an outer housing covering an exterior of the inner housing and extending rearward from the inner housing, a spindle protruding from a front of the housing, rotatable when driven by the motor, and including a protruding end to receive a tip tool, a controller that controls driving of the motor, a handle mount located at the front of the housing to receive an auxiliary handle in a detachable manner, a handle detector that electrically detects an attachment of the auxiliary handle to the handle mount, and wiring extending between the inner housing and the outer housing to electrically connect the controller and the handle detector.
    Type: Application
    Filed: February 17, 2023
    Publication date: October 19, 2023
    Applicant: MAKITA CORPORATION
    Inventor: Fumitoshi NUMATA
  • Publication number: 20230302624
    Abstract: An electric power tool includes a housing, a fan, a tubular portion, and a rectifier. The housing houses a motor. The fan rotates in association with driving of the motor to generate a cooling air for the motor within the housing. The tubular portion is formed in the housing to house the fan. The rectifier is disposed to be opposed to the fan in an upstream side of the cooling air. The rectifier is divided into an inside and an outside in a radial direction of the tubular portion, the outside in the radial direction is formed of the tubular portion, and the inside in the radial direction is formed of a baffle plate assembled to the housing.
    Type: Application
    Filed: April 21, 2023
    Publication date: September 28, 2023
    Applicant: MAKITA CORPORATION
    Inventor: Fumitoshi NUMATA
  • Publication number: 20230278157
    Abstract: A grinder includes a locking assembly to lock a spindle in a head housing and has outlets with a large opening area for high cooling efficiency. A grinder includes a main housing accommodating a motor and a fan, a spindle, a locking assembly that locks rotation of the spindle, and a head housing including a joint connected to a front of the main housing, and a compartment accommodating the spindle and the locking assembly. The compartment is laterally less wide than the joint. The locking assembly is located at a middle in a lateral direction of the head housing. The joint has, in a portion of a front surface of the joint, a first outlet at least on a right or a left of the compartment to discharge air for cooling the motor generated from rotation of the fan.
    Type: Application
    Filed: January 5, 2023
    Publication date: September 7, 2023
    Applicant: MAKITA CORPORATION
    Inventor: Fumitoshi NUMATA
  • Publication number: 20230249314
    Abstract: Heat generated during braking is reduced to prevent reduction in braking performance or the service life of the components. A grinder includes a housing, an operable member, a switch operable to be turned on or off in response to an operation on the operable member, a rotational shaft rotatable in response to an operation for turning on the switch, and a brake assembly that applies braking to the rotational shaft with the switch being in an off state and to release the braking applied to the rotational shaft in response to an operation for turning on the switch performed by the operable member. The brake assembly includes a brake member being circular and fixed to the rotational shaft, and multiple pressing members that press the brake member at multiple positions to apply a uniform force to the brake member from radially outward positions toward a center of the brake member.
    Type: Application
    Filed: January 6, 2023
    Publication date: August 10, 2023
    Applicant: MAKITA CORPORATION
    Inventor: Fumitoshi NUMATA
  • Patent number: 11691262
    Abstract: An electric power tool includes a housing, a fan, a tubular portion, and a rectifier. The housing houses a motor. The fan rotates in association with driving of the motor to generate a cooling air for the motor within the housing. The tubular portion is formed in the housing to house the fan. The rectifier is disposed to be opposed to the fan in an upstream side of the cooling air. The rectifier is divided into an inside and an outside in a radial direction of the tubular portion, the outside in the radial direction is formed of the tubular portion, and the inside in the radial direction is formed of a baffle plate assembled to the housing.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: July 4, 2023
    Assignee: MAKITA CORPORATION
    Inventor: Fumitoshi Numata
  • Patent number: 11571802
    Abstract: A metal wire may be provided inside a hanger portion extending with an annular shape and which is integrally formed with an outer casing. An electric power tool may be prevented from falling, etc. due to deformation or breakage of the hanger portion by being reinforced by the wire.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: February 7, 2023
    Assignee: MAKITA CORPORATION
    Inventors: Fumitoshi Numata, Hideharu Muto, Yasushi Ogura, Kenichi Tabushi
  • Patent number: 11472018
    Abstract: A power tool includes a handle detector that is less susceptible to vibrations and is highly durable and reliable. A grinder includes a brushless motor, an inner housing accommodating the brushless motor, a rubber cylinder, a spindle driven by the brushless motor, and an outer housing enclosing the inner housing and holding the inner housing with the rubber cylinder in between. The outer housing includes a handle mount and at least one handle detector that detects a side handle attached.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: October 18, 2022
    Assignee: MAKITA CORPORATION
    Inventor: Fumitoshi Numata
  • Publication number: 20220305508
    Abstract: An electric blower is configured to blow air. The blower includes a body configured such that a sprayer attachment is attachable thereto. The body is configured to be carried integrally with the sprayer attachment with the sprayer attachment attached to the body. The sprayer attachment includes a container, a nozzle and a liquid supply passage. The container is configured to store a liquid. The nozzle has a discharge opening. The liquid supply passage is connected to the container and the nozzle to lead the liquid.
    Type: Application
    Filed: March 2, 2022
    Publication date: September 29, 2022
    Applicant: MAKITA CORPORATION
    Inventor: Fumitoshi NUMATA
  • Publication number: 20220258321
    Abstract: A power tool includes an accessory and a reader. The accessory is configured to be attachable to and detachable from the power tool. The accessory includes a passive wireless tag. The reader includes at least one antenna and a reading part. The reading part is electrically connected to the at least one antenna. The reading part is configured to wirelessly communicate with the wireless tag via the at least one antenna and to read information stored in the wireless tag when the accessory is attached to the power tool.
    Type: Application
    Filed: July 28, 2020
    Publication date: August 18, 2022
    Applicant: MAKITA CORPORATION
    Inventor: Fumitoshi NUMATA
  • Patent number: 11396078
    Abstract: Vibrations and a reaction force transferred to an operator are effectively reduced to improve usability and operability. A grinder includes an inner housing accommodating a motor, a final output shaft located in front of the motor, a connecting shaft parallel to the final output shaft, a front elastic member located in front of the connecting shaft, and an outer housing enclosing the inner housing and holding, with the connecting shaft and the front elastic member in between, the inner housing in a relatively rotatable manner.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: July 26, 2022
    Assignee: MAKITA CORPORATION
    Inventor: Fumitoshi Numata
  • Publication number: 20220196035
    Abstract: A blower includes a body having a main inlet opening and a discharge opening, a motor assembly housed in the body, and an auxiliary inlet opening. The motor assembly includes a case, a motor and a fan. The case has a first opening and a second opening. The motor is housed within the case. The fan is configured to rotate in response to driving of the motor to generate a flow of air passing the main inlet opening, the first opening, the motor, the second opening and the discharge opening in this order. A first space that communicates with the main inlet opening and the first opening of the case is formed within the body. The auxiliary inlet opening is configured to introduce the air from an outside of the body into the first space.
    Type: Application
    Filed: December 20, 2021
    Publication date: June 23, 2022
    Applicant: MAKITA CORPORATION
    Inventors: Fumitoshi NUMATA, Takumi HAYASHI
  • Patent number: D997476
    Type: Grant
    Filed: January 7, 2022
    Date of Patent: August 29, 2023
    Assignee: MAKITA CORPORATION
    Inventors: Xing Xu, Tatsuya Kobayashi, Dan Shi, Fumitoshi Numata