Patents by Inventor Yoshiro Tada
Yoshiro Tada 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: 10751868Abstract: It is an object of the invention to provide rational structure for vibration proofing in hammering operation. A driving motor 110 and a striking mechanism 140 are provided in a first body element 101a, and a handle 109 and a battery mounting part 160 are provided in a second body element 101b. The first and second body elements 101a, 101b are moved with respect to each other via a biasing member 181 when vibration is caused by driving of the striking mechanism 140. Further, a first region 100a close to the striking mechanism 140 forms a long-distance moving region 200 in which the first and second body elements 101a, 101b move a longer distance in a longitudinal direction than in the second region 100b less close to the striking mechanism 140.Type: GrantFiled: November 27, 2015Date of Patent: August 25, 2020Assignee: MAKITA CORPORATIONInventors: Yoshiro Tada, Masanori Furusawa, Kei Watanabe
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Patent number: 10744609Abstract: A dust collector for electric power tool includes a casing, a ring-shaped suction opening, a dust collecting route, and a filter. The suction opening protrudes forward from the casing. The tool bit of the electric power tool is insertable into the suction opening in a state where the suction opening is brought into contact with a surface to be processed. The dust collecting route is formed within the casing and guides an air suctioned from the suction opening to a dust collection portion in the casing. The filter is disposed in the dust collection portion to capture dust suctioned with the air. On the dust collecting route in the dust collection portion, a first filter and a second filter are disposed. The first filter includes a dust collecting chamber partitioned inside the dust collection portion. The second filter is arranged outside the first filter independently from the first filter.Type: GrantFiled: January 31, 2019Date of Patent: August 18, 2020Assignee: MAKITA CORPORATIONInventor: Yoshiro Tada
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Patent number: 10744634Abstract: An impact tool is provided which has a driving mechanism, that drives a tool bit, a motor that drives the driving mechanism, an inner housing that houses the driving mechanism, an outer housing that has an internal space for housing the inner housing and the motor, an opening that leads from the outside to the internal space of the outer housing, and a covering member that covers the opening.Type: GrantFiled: November 9, 2017Date of Patent: August 18, 2020Assignee: MAKITA CORPORATIONInventors: Yasuhiro Kakiuchi, Hajime Takeuchi, Masanori Furusawa, Yoshiro Tada
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Publication number: 20200078918Abstract: An impact tool includes a motor, a driving mechanism, a body housing, a battery-mounting part, a first detection part and a control part. The driving mechanism is configured to linearly drive a tool accessory along a driving axis by power of the motor, the driving axis extending in a front-rear direction of the impact tool. The body housing houses the motor and the driving mechanism. The battery-mounting part is configured to removably receive a battery. The first detection part is configured to detect a rearward push of the tool accessory relative to the body housing. The control part is configured to start driving of the motor in response to detection of the rearward push of the tool accessory by the first detection part.Type: ApplicationFiled: September 9, 2019Publication date: March 12, 2020Applicant: MAKITA CORPORATIONInventors: Kiyonobu YOSHIKANE, Yoshiro TADA, Yoshitaka MACHIDA
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Publication number: 20190381646Abstract: A power tool (100) comprises a motor (110) operably driving a tool bit (119), a tool body (101) housing the motor (110), a handle (109) coupled to the tool body (101), and at least two battery mount parts (160A, 160B) defined on the handle (109) and/or the tool body (101). Each of the battery mount parts (160A, 160B) comprises a battery engaging part (161) configured to detachably engage with battery packs (170A, 170B) by sliding the battery packs (170A, 170B) relative to the battery engaging part (161) in a direction perpendicular to the longitudinal direction of the tool bit (119).Type: ApplicationFiled: September 3, 2019Publication date: December 19, 2019Inventors: Kiyonobu YOSHIKANE, Hajime TAKEUCHI, Yoshiro TADA, Masanori FURUSAWA, Masao MIWA, Shinji ONODA, Yoshitaka MACHIDA
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Publication number: 20190344416Abstract: An impact tool includes a switch for driving the tool accessory, an operation member configured to be movable between an OFF position and an ON position, a first lock member configured to lock the operation member in the ON position, a second lock member configured to be movable between a lock position and a lock-release position in response to an external operation by a user, and a holding mechanism configured to hold the second lock member in the lock position and also in the lock-release position. The second lock member in the lock position is capable of locking the operation member in the OFF position, and the second lock member in the lock-release position is incapable of locking the operation member in the OFF position.Type: ApplicationFiled: April 23, 2019Publication date: November 14, 2019Applicant: MAKITA CORPORATIONInventors: Yoshiro TADA, Kei WATANABE, Tetsuhisa KANEKO
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Publication number: 20190314971Abstract: An impact tool includes a tubular tool holder, a hammering mechanism, a resistor, and a biasing member. An impact element moves forward and rearward in conjunction with a piston. An intermediate element is housed movable back and forth between the impact element and a tip tool. The intermediate element abuts on a rear end of the tip tool to indirectly transmit a striking force from the impact element to the tip tool in a normal striking. The resistor is configured to abut on at least one of the intermediate element and the tip tool to apply a resistance to a front-rear movement of at least one of the intermediate element and the tip tool in a non-striking state. The biasing member disposed on the tool holder biases the resistor to a side of at least one of the intermediate element and the tip tool.Type: ApplicationFiled: February 28, 2019Publication date: October 17, 2019Applicant: MAKITA CORPORATIONInventors: Kiyonobu YOSHIKANE, Yoshiro TADA, Mizuki YAMAMOTO
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Publication number: 20190291226Abstract: A dust collector for electric power tool includes a casing, a ring-shaped suction opening, a dust collecting route, and a filter. The suction opening protrudes forward from the casing. The tool bit of the electric power tool is insertable into the suction opening in a state where the suction opening is brought into contact with a surface to be processed. The dust collecting route is formed within the casing and guides an air suctioned from the suction opening to a dust collection portion in the casing. The filter is disposed in the dust collection portion to capture dust suctioned with the air. On the dust collecting route in the dust collection portion, a first filter and a second filter are disposed. The first filter includes a dust collecting chamber partitioned inside the dust collection portion. The second filter is arranged outside the first filter independently from the first filter.Type: ApplicationFiled: January 31, 2019Publication date: September 26, 2019Applicant: MAKITA CORPORATIONInventor: Yoshiro TADA
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Patent number: 10076833Abstract: An electric tool may include a battery mount portion having a guide groove structure that can be slidably fitted with a guide projection structure of a rechargeable battery. A reinforcing member may be attached to the guide groove structure of the battery mount portion and may include a connecting structure for detachably connecting the reinforcing member to the guide groove structure.Type: GrantFiled: September 11, 2014Date of Patent: September 18, 2018Assignee: MAKITA CORPORATIONInventors: Yoshiro Tada, Masanori Furusawa
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Patent number: 9956659Abstract: A dust collecting device 140 is provided which is attached to an electric hammer 101 having a side handle 110 which is removably attached to a body 103. The dust collecting device 140 has a dust collecting hood 141 and a hose holder 145. The side handle 110 has a mounting ring 111 which is mounted on the body 103, a grip 121 and a grip securing part 131. The grip 121 is secured by moving relative to the grip securing part 131 in a direction crossing an axial direction of the hammer bit 200. By this relative movement for securing the grip 121, the hose holder 145 is held between the grip 121 and the grip securing part 131.Type: GrantFiled: November 12, 2013Date of Patent: May 1, 2018Assignee: MAKITA CORPORATIONInventors: Hajime Takeuchi, Masanori Furusawa, Yoshiro Tada
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Patent number: 9950418Abstract: An impact tool is provided which has a driving mechanism 120, 140 that drives a tool bit 119, a motor 110 that drives the driving mechanism 120, 140, an inner housing 103 that houses the driving mechanism 120, 140, an outer housing 101 that has an internal space for housing the inner housing 103 and the motor 110, an opening 193 that leads from the outside to the internal space of the outer housing 101, and a covering member 195 that covers the opening 193.Type: GrantFiled: December 20, 2013Date of Patent: April 24, 2018Assignee: MAKITA CORPORATIONInventors: Yasuhiro Kakiuchi, Hajime Takeuchi, Masanori Furusawa, Yoshiro Tada
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Publication number: 20180065240Abstract: An impact tool is provided which has a driving mechanism, that drives a tool bit, a motor that drives the driving mechanism, an inner housing that houses the driving mechanism, an outer housing that has an internal space for housing the inner housing and the motor, an opening that leads from the outside to the internal space of the outer housing, and a covering member that covers the opening.Type: ApplicationFiled: November 9, 2017Publication date: March 8, 2018Applicant: MAKITA CORPORATIONInventors: Yasuhiro KAKIUCHI, Hajime TAKEUCHI, Masanori FURUSAWA, Yoshiro TADA
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Publication number: 20170252915Abstract: A hammer drill includes a housing, a tool holder, a hammering member, a gear, and a conversion member. The gear is switched to a first state where a rotation of the intermediate shaft is transmitted and a second state where the rotation of the intermediate shaft is not transmitted, and a mode switching member is configured to perform a switching operation of the state of the gear from an outside of the housing. The switching of the state of the gear by the mode switching member provides at least two operation modes of a hammer drill mode where the gear integrally rotates with the intermediate shaft to generate the rotation and a reciprocation of the hammering member on the tool holder and a hammer mode where the gear is separated from the rotation of the intermediate shaft to generate only the reciprocation of the hammering member to be selectable.Type: ApplicationFiled: January 31, 2017Publication date: September 7, 2017Applicant: MAKITA CORPORATIONInventors: Masanori FURUSAWA, Keita MORI, Yoshiro TADA
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Patent number: 9573262Abstract: A hammer drill serving as an impact tool is provided with a crank housing that accommodates a crankshaft, and a cylinder accommodated in the crank housing. Receiving portions that receive the cylinder which is pressed rearward are provided at multiple locations of the crank housing in the front-rear direction. At least one of the receiving portions is disposed to receive the rear-end portion of the cylinder. A portion of the cylinder, which is received by another one of the receiving portions is a circlip (circumferential member) made of a metal.Type: GrantFiled: October 16, 2013Date of Patent: February 21, 2017Assignee: MAKITA CORPORATIONInventors: Hajime Takeuchi, Masanori Furusawa, Yoshiro Tada
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Patent number: 9463563Abstract: It is an object of the invention to provide an improved impact tool in which a biasing member is not affected by dust. An impact tool according to the invention has a driving mechanism 120 for driving a tool bit 119, housing parts 105, 106 that form a housing space 105a in which at least part of the driving mechanism 120 is disposed, and a switching member 160 for switching a drive mode of the impact tool. The switching member 160 has an operating member 161 that is operated by a user for mode switching, and a biasing member 175 that is disposed between the operating member 161 and the housing part 106 and biases the operating member 161 so as to hold the operating member 161 in a selected position. The biasing member 175 is disposed in the housing space 105a.Type: GrantFiled: November 6, 2013Date of Patent: October 11, 2016Assignee: MAKITA CORPORATIONInventors: Hajime Takeuchi, Masanori Furusawa, Yoshiro Tada
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Publication number: 20160151905Abstract: It is an object of the invention to provide rational structure for vibration proofing in hammering operation. A driving motor 110 and a striking mechanism 140 are provided in a first body element 101a, and a handle 109 and a battery mounting part 160 are provided in a second body element 101b. The first and second body elements 101a, 101b are moved with respect to each other via a biasing member 181 when vibration is caused by driving of the striking mechanism 140. Further, a first region 100a close to the striking mechanism 140 forms a long-distance moving region 200 in which the first and second body elements 101a, 101b move a longer distance in a longitudinal direction than in the second region 100b less close to the striking mechanism 140.Type: ApplicationFiled: November 27, 2015Publication date: June 2, 2016Inventors: Yoshiro TADA, Masanori FURUSAWA, Kei WATANABE
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Publication number: 20150328764Abstract: A power tool includes a motor which drives a tool bit, a tool body, a handle, and battery mount part, to which battery is detachably mounted. The power tool includes a plurality of battery mount parts, and the battery mount part, includes a battery engaging part with which the battery, can engage. The battery is mounted to the battery mount part by sliding against the battery engaging part in a crossing direction which crosses the longitudinal direction of the tool bit.Type: ApplicationFiled: July 27, 2015Publication date: November 19, 2015Inventors: Kiyonobu YOSHIKANE, Hajime TAKEUCHI, Yoshiro TADA, Masanori FURUSAWA, Masao MIWA, Shinji ONODA, Yoshitaka MACHIDA
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Patent number: 9108284Abstract: In a dust collection device attached to a hammer drill, a filter is provided in a dust box at a position at which the filter covers an outlet provided on a rear face of a lid body, in a state such that a filter surface projects into the dust box from the rear face of the lid body. A space is formed between an inner face of a box main body and a side face of the filter that is adjacent to the filter surface. Air outlets are provided to guide air, which flows in through an inlet, toward the space.Type: GrantFiled: March 15, 2012Date of Patent: August 18, 2015Assignee: MAKITA CORPORATIONInventors: Yoshiro Tada, Kiyonobu Yoshikane, Yoshitaka Machida
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Publication number: 20150104250Abstract: An electric tool may include a battery mount portion having a guide groove structure that can be slidably fitted with a guide projection structure of a rechargeable battery. A reinforcing member may be attached to the guide groove structure of the battery mount portion and may include a connecting structure for detachably connecting the reinforcing member to the guide groove structure.Type: ApplicationFiled: September 11, 2014Publication date: April 16, 2015Inventors: Yoshiro TADA, Masanori FURUSAWA
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Publication number: 20140174777Abstract: An impact tool is provided which has a driving mechanism 120, 140 that drives a tool bit 119, a motor 110 that drives the driving mechanism 120, 140, an inner housing 103 that houses the driving mechanism 120, 140, an outer housing 101 that has an internal space for housing the inner housing 103 and the motor 110, an opening 193 that leads from the outside to the internal space of the outer housing 101, and a covering member 195 that covers the opening 193.Type: ApplicationFiled: December 20, 2013Publication date: June 26, 2014Inventors: Yasuhiro KAKIUCHI, Hajime TAKEUCHI, Masanori FURUSAWA, Yoshiro TADA