Patents by Inventor Kohei OISHI
Kohei OISHI 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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Patent number: 11878726Abstract: A handcart may include a chassis unit and a container unit configured to be detachably attached to the chassis unit. The chassis unit may include a front wheel unit rotatably supporting a front wheel; a rear wheel unit rotatably supporting a rear wheel; a chassis frame extending in a front-rear direction and supporting the front and rear wheel units; and a prime mover configured to rotate at least one of the front wheel and the rear wheel as a drive wheel. The container unit may be selected from a group including at least a first container unit and a second container unit. The first container unit may include a first container and a first container frame extending in the front-rear direction and supporting the first container. The second container unit may include a second container and a second container frame extending in the front-rear direction and supporting the second container.Type: GrantFiled: August 6, 2020Date of Patent: January 23, 2024Assignee: MAKITA CORPORATIONInventors: Yoshinori Shibata, Susumu Kato, Tomonobu Nashimoto, Kohei Oishi, Yasuo Ifuku
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Patent number: 11834087Abstract: A handcart may include a chassis unit and a container unit configured to be detachably attached to the chassis unit. The chassis unit may include a front wheel unit rotatably supporting a front wheel; a rear wheel unit rotatably supporting a rear wheel; a chassis frame extending in a front-rear direction and supporting the front and rear wheel units; and a prime mover configured to rotate at least one of the front wheel and the rear wheel as a drive wheel. The container unit may be selected from a group including at least a first container unit and a second container unit. The first container unit may include a first container and a first container frame extending in the front-rear direction and supporting the first container. The second container unit may include a second container and a second container frame extending in the front-rear direction and supporting the second container.Type: GrantFiled: August 6, 2020Date of Patent: December 5, 2023Assignee: MAKITA CORPORATIONInventors: Yoshinori Shibata, Susumu Kato, Tomonobu Nashimoto, Kohei Oishi, Yasuo Ifuku
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Patent number: 11833656Abstract: A chain saw may include a saw chain, a guide bar to which the saw chain is attached, a sprocket configured to run the saw chain along a periphery of the guide bar, a prime mover configured to rotate the sprocket, an oil tank configured to store oil to be supplied to the saw chain, a housing that houses the prime mover and the oil tank, a bolt protruding from the housing and penetrating a hole disposed in the guide bar, a nut screwed onto the bolt to fix the guide bar to the housing, and a heat dissipating structure configured to dissipate heat from the bolt to the oil in the oil tank.Type: GrantFiled: December 15, 2021Date of Patent: December 5, 2023Assignee: MAKITA CORPORATIONInventors: Kohei Oishi, Ryo Sunazuka, Yoshifumi Watanabe
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Patent number: 11801882Abstract: A handcart may include a drive wheel; a prime mover configured to rotate the drive wheel; a grip portion configured to be gripped by a user; and a visibly noticeable portion that is clearly noticeable from behind the user when the user stands behind the handcart, gripping the grip portion.Type: GrantFiled: March 25, 2022Date of Patent: October 31, 2023Assignee: MAKITA CORPORATIONInventors: Tomoyuki Kutsuna, Toshihiro Tomita, Susumu Kato, Tomonobu Nashimoto, Kohei Oishi
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Patent number: 11787458Abstract: A handcart may include a frame; a drive wheel rotatably supported by the frame about a rotation axis extending in a right-left direction; a prime mover configured to rotate the drive wheel; a bracket pivotably supported by the frame about a pivot axis extending in an up-down direction; and a non-drive wheel supported by the bracket about a rotation axis extending in a direction perpendicular to the up-down direction. The non-drive wheel may include a first non-drive wheel and a second non-drive wheel, and the first non-drive wheel and the second non-drive wheel may be configured to be rotatable independent of each other.Type: GrantFiled: August 5, 2020Date of Patent: October 17, 2023Assignee: MAKITA CORPORATIONInventors: Susumu Kato, Tomonobu Nashimoto, Shin Noji, Kohei Oishi, Yasuo Ifuku
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Publication number: 20230284556Abstract: A working machine may include: a first blade; a second blade overlapping with the first blade in an up-down direction; and a holding unit configured to hold the first blade and the second blade overlapping each other in the up-down direction. The first blade may be configured to reciprocate in a direction perpendicular to the up-down direction with respect to the second blade. The first blade may include a first elongated hole having a longitudinal direction along the reciprocating direction. The second blade may include a second elongated hole having a longitudinal direction along the reciprocating direction. The holding unit may include: a holding part inserted in the first elongated hole of the first blade and the second elongated hole of the second blade; and an outer sleeve having a cylindrical shape and supported by the holding part such that the outer sleeve is rotatable around the holding part.Type: ApplicationFiled: March 6, 2023Publication date: September 14, 2023Applicant: Makita CorporationInventors: Kohei OISHI, Takayoshi IIO, Tomoyuki KUTSUNA, Satoshi TAKAHASHI
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Publication number: 20230101418Abstract: A working machine may include: a conversion mechanism configured to convert motion of a prime mover; a first blade connected to the conversion mechanism; a second blade overlapping with the first blade in an up-down direction and facing a first facing surface of the first blade; a sealing member engaged with a first non-facing surface of the first blade that is opposite to the first facing surface, wherein the sealing member includes a first sealing surface facing the first non-facing surface in the up-down direction; and a cover member facing a second sealing surface of the sealing member that is opposite to the first sealing surface of the sealing member. The sealing member may be disposed forward of the conversion mechanism and configured to suppress the object cut with the first blade and the second blade from moving toward the conversion mechanism between the first blade and the cover member.Type: ApplicationFiled: September 28, 2022Publication date: March 30, 2023Applicant: Makita CorporationInventors: Kohei OISHI, Tomoyuki Kutsuna
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Patent number: 11400966Abstract: A handcart may include a support frame, an actuator, a rotating frame configured to be rotated relative to the support frame by the actuator and a container configured to be rotated relative to the support frame. The container may be configured to be rotated with the rotating frame relative to the support frame when the rotating frame is rotated relative to the support frame by the actuator. The rotating frame may be rotatable up to a position at which an angle between the support frame and the rotating frame becomes a first rotation angle. The container may be rotatable up to a position at which an angle between the support frame and the container becomes a second rotation angle, the second rotation angle being greater than the first rotation angle.Type: GrantFiled: August 6, 2020Date of Patent: August 2, 2022Assignee: MAKITA CORPORATIONInventors: Susumu Kato, Tomonobu Nashimoto, Kohei Oishi, Yasuo Ifuku
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Patent number: 11390310Abstract: A handcart may include a drive wheel; a prime mover configured to rotate the drive wheel; a grip portion configured to be gripped by a user; and a visibly noticeable portion that is clearly noticeable from behind the user when the user stands behind the handcart, gripping the grip portion.Type: GrantFiled: August 6, 2020Date of Patent: July 19, 2022Assignee: MAKITA CORPORATIONInventors: Tomoyuki Kutsuna, Toshihiro Tomita, Susumu Kato, Tomonobu Nashimoto, Kohei Oishi
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Publication number: 20220212705Abstract: A handcart may include a drive wheel; a prime mover configured to rotate the drive wheel; a grip portion configured to be gripped by a user; and a visibly noticeable portion that is clearly noticeable from behind the user when the user stands behind the handcart, gripping the grip portion.Type: ApplicationFiled: March 25, 2022Publication date: July 7, 2022Applicant: Makita CorporationInventors: Tomoyuki KUTSUNA, Toshihiro TOMITA, Susumu KATO, Tomonobu NASHIMOTO, Kohei OISHI
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Publication number: 20220203513Abstract: A chain saw may include a saw chain, a guide bar to which the saw chain is attached, a sprocket configured to run the saw chain along a periphery of the guide bar, a prime mover configured to rotate the sprocket, an oil tank configured to store oil to be supplied to the saw chain, a housing that houses the prime mover and the oil tank, a bolt protruding from the housing and penetrating a hole disposed in the guide bar, a nut screwed onto the bolt to fix the guide bar to the housing, and a heat dissipating structure configured to dissipate heat from the bolt to the oil in the oil tank.Type: ApplicationFiled: December 15, 2021Publication date: June 30, 2022Applicant: MAKITA CORPORATIONInventors: Kohei OISHI, Ryo SUNAZUKA, Yoshifumi WATANABE
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Publication number: 20210039702Abstract: A handcart may include a drive wheel; a prime mover configured to rotate the drive wheel; a grip portion configured to be gripped by a user; and a visibly noticeable portion that is clearly noticeable from behind the user when the user stands behind the handcart, gripping the grip portion.Type: ApplicationFiled: August 6, 2020Publication date: February 11, 2021Applicant: Makita CorporationInventors: Tomoyuki KUTSUNA, Toshihiro TOMITA, Susumu KATO, Tomonobu NASHIMOTO, Kohei OISHI
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Publication number: 20210039703Abstract: A handcart may include a frame; a drive wheel rotatably supported by the frame about a rotation axis extending in a right-left direction; a prime mover configured to rotate the drive wheel; a bracket pivotably supported by the frame about a pivot axis extending in an up-down direction; and a non-drive wheel supported by the bracket about a rotation axis extending in a direction perpendicular to the up-down direction. The non-drive wheel may include a first non-drive wheel and a second non-drive wheel, and the first non-drive wheel and the second non-drive wheel may be configured to be rotatable independent of each other.Type: ApplicationFiled: August 5, 2020Publication date: February 11, 2021Applicant: Makita CorporationInventors: Susumu KATO, Tomonobu Nashimoto, Shin Noji, Kohei Oishi, Yasuo Ifuku
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Publication number: 20210039697Abstract: A handcart may include a chassis unit and a container unit configured to be detachably attached to the chassis unit. The chassis unit may include a front wheel unit rotatably supporting a front wheel; a rear wheel unit rotatably supporting a rear wheel; a chassis frame extending in a front-rear direction and supporting the front and rear wheel units; and a prime mover configured to rotate at least one of the front wheel and the rear Wheel as a drive wheel. The container unit may be selected from a group including at least a first container unit and a second container unit. The first container unit may include a first container and a first container frame extending in the front-rear direction and supporting the first container, The second container unit may include a second container and a second container frame extending in the front-rear direction and supporting the second container.Type: ApplicationFiled: August 6, 2020Publication date: February 11, 2021Applicant: MAKITA CORPORATIONInventors: Yoshinori SHIBATA, Susumu KATO, Tomonobu NASHIMOTO, Kohei OISHI, Yasuo IFUKU
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Publication number: 20210039698Abstract: A handcart may include a support frame, an actuator, a rotating frame configured to be rotated relative to the support frame by the actuator and a container configured to be rotated relative to the support frame. The container may be configured to be rotated with the rotating frame relative to the support frame when the rotating frame is rotated relative to the support frame by the actuator. The rotating frame may be rotatable up to a position at which an angle between the support frame and the rotating frame becomes a first rotation angle. The container may be rotatable up to a position at which an angle between the support frame and the container becomes a second rotation angle, the second rotation angle being greater than the first rotation angle.Type: ApplicationFiled: August 6, 2020Publication date: February 11, 2021Applicant: Makita CorporationInventors: Susumu KATO, Tomonobu NASHIMOTO, Kohei OISHI, Yasuo IFUKU