Patents by Inventor Yasuhiro Kakiuchi
Yasuhiro Kakiuchi 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: 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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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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Patent number: 9126320Abstract: A working tool in which a tip tool with a longitudinal shaft is linearly moved, wherein a motor and other tool constituting members are effectively cooled. In order to cool the inside of a motor-driven hammer comprising a main body, a motor, and a motion converter, the hammer is provided with a first cooling air passage through which a cooling air is supplied to the motor, and a second cooling air passage through which a cooling air is supplied to a hammer portion. To generate a cooling air to be supplied to the first and second cooling air passages, a cooling fan is provided at a lower portion of an output shaft of the motor and a hammer portion cooling fan is provided between the output shaft of the motor and the motion converter.Type: GrantFiled: December 8, 2009Date of Patent: September 8, 2015Assignee: MAKITA CORPORATIONInventors: Yasutoshi Shinma, Yasuhiro Kakiuchi
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Patent number: 9114491Abstract: A male terminal is formed on a dust collecting device so as to protrude therefrom, while a plug-in port into which the male terminal can be inserted, and a female terminal that is located inside the plug-in port and can be electrically connected to the male terminal, are provided in a hammer drill. When the dust collecting device is joined to the hammer drill and the male terminal is electrically connected to the female terminal, a driving source is supplied from a battery pack to the dust collecting device.Type: GrantFiled: February 10, 2011Date of Patent: August 25, 2015Assignee: MAKITA CORPORATIONInventors: Yasuhiro Kakiuchi, Hajime Takeuchi, Yoshitaka Machida
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Patent number: 8915309Abstract: A dust box joined to a dust collecting device is formed of a box body, and a lid body that is joined to the box body by a hinge and can open and close an opening of the box body, and a main filter and a pre-filter are attached to the lid body.Type: GrantFiled: February 17, 2011Date of Patent: December 23, 2014Assignee: Makita CorporationInventors: Yasuhiro Kakiuchi, Yoshitaka Machida
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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
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Patent number: 8496074Abstract: In a power tool, a housing is composed of two divisional housings to be combined together; two receptacle blocks are provided on inner surfaces of the two divisional housings, respectively, and configured to protrude opposite to each other from the inner surfaces of the two divisional housings to surround an electric component and to hold the electric component in place when the two divisional housings are combined together into the housing; and a seal layer of an elastic material is formed integrally with one or each of the two receptacle blocks. The seal layer formed on a first receptacle block is pressed against a second receptacle block or another seal layer formed on the second receptacle block to provide sealing between opposed surfaces of the two receptacle blocks when the two divisional housings are combined together.Type: GrantFiled: August 13, 2010Date of Patent: July 30, 2013Assignee: Makita CorporationInventors: Junichi Nishikimi, Yasuhiro Kakiuchi
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Patent number: 8360168Abstract: It is an object of the invention to provide a power tool that effectively prevents leakage of lubricant while regulating the internal pressure of a housing space for a driving mechanism. The object can be achieved by a representative power tool that includes a too bit 119, a driving mechanism 113, 115, an enclosed housing space 107a which houses the driving mechanism and in which lubricant is sealed in, and a path 151 which regulates pressure of the housing space 107a. On the path, a filter chamber 154 having a predetermined capacity, an inner passage 155c that communicates the filter chamber 154 with the housing space 107a, and an outer passage 159c that communicates the filter chamber 154 with the outside are formed. A filter 157 is disposed in the filter chamber 154 and spaced apart from a peripheral edge of an opening of the outer passage 159c which is open to the filter chamber 154, so that a space 161 is created on the opening edge side of the filter chamber 154.Type: GrantFiled: July 30, 2010Date of Patent: January 29, 2013Assignee: Makita CorporationInventors: Yasuhiro Kakiuchi, Shinya Bito
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Patent number: 8348286Abstract: A carrier for carrying a power tool may include a tool bit holder supporting at least one tool bit and a tool bit restraint device that is capable of preventing the at least one tool bit from being dropped out of the tool bit holder. The tool bit restraint device includes a tool bit restraint member. The tool bit restraint member is arranged and constructed so as to substantially uniformly press the at least one tool bit, thereby restraining the at least one tool bit.Type: GrantFiled: March 19, 2009Date of Patent: January 8, 2013Assignee: Makita CorporationInventors: Takuo Arakawa, Shinsuke Tateyama, Takuya Sumi, Masao Miwa, Yasuhiro Kakiuchi
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Publication number: 20120298391Abstract: A male terminal is formed on a dust collecting device so as to protrude therefrom, while a plug-in port into which the male terminal can be inserted, and a female terminal that is located inside the plug-in port and can be electrically connected to the male terminal, are provided in a hammer drill. When the dust collecting device is joined to the hammer drill and the male terminal is electrically connected to the female terminal, a driving source is supplied from a battery pack to the dust collecting device.Type: ApplicationFiled: February 10, 2011Publication date: November 29, 2012Applicant: MAKITA CORPORATIONInventors: Yasuhiro Kakiuchi, Hajime Takeuchi, Yoshitaka Machida
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Publication number: 20110308828Abstract: A working tool in which a tip tool with a longitudinal shaft is linearly moved, wherein a motor and other tool constituting members are effectively cooled. In order to cool the inside of a motor-driven hammer comprising a main body, a motor, and a motion converter, the hammer is provided with a first cooling air passage through which a cooling air is supplied to the motor, and a second cooling air passage through which a cooling air is supplied to a hammer portion. To generate a cooling air to be supplied to the first and second cooling air passages, a cooling fan is provided at a lower portion of an output shaft of the motor and a hammer portion cooling fan is provided between the output shaft of the motor and the motion converter.Type: ApplicationFiled: December 8, 2009Publication date: December 22, 2011Applicant: MAKITA CORPORATIONInventors: Yasutoshi Shinma, Yasuhiro Kakiuchi
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Publication number: 20110226499Abstract: A dust box joined to a dust collecting device is formed of a box body, and a lid body that is joined to the box body by a hinge and can open and close an opening of the box body, and a main filter and a pre-filter are attached to the lid body.Type: ApplicationFiled: February 17, 2011Publication date: September 22, 2011Applicant: MAKITA CORPORATIONInventors: Yasuhiro KAKIUCHI, Yoshitaka MACHIDA
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Publication number: 20110083868Abstract: In a power tool, a housing is composed of two divisional housings to be combined together; two receptacle blocks are provided on inner surfaces of the two divisional housings, respectively, and configured to protrude opposite to each other from the inner surfaces of the two divisional housings to surround an electric component and to hold the electric component in place when the two divisional housings are combined together into the housing; and a seal layer of an elastic material is formed integrally with one or each of the two receptacle blocks. The seal layer formed on a first receptacle block is pressed against a second receptacle block or another seal layer formed on the second receptacle block to provide sealing between opposed surfaces of the two receptacle blocks when the two divisional housings are combined together.Type: ApplicationFiled: August 13, 2010Publication date: April 14, 2011Applicant: MAKITA CORPORATIONInventors: Junichi NISHIKIMI, Yasuhiro Kakiuchi
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Publication number: 20110030983Abstract: It is an object of the invention to provide a power tool that effectively prevents leakage of lubricant while regulating the internal pressure of a housing space for a driving mechanism. The object can be achieved by a representative power tool that includes a too bit 119, a driving mechanism 113, 115, an enclosed housing space 107a which houses the driving mechanism and in which lubricant is sealed in, and a path 151 which regulates pressure of the housing space 107a. On the path, a filter chamber 154 having a predetermined capacity, an inner passage 155c that communicates the filter chamber 154 with the housing space 107a, and an outer passage 159c that communicates the filter chamber 154 with the outside are formed. A filter 157 is disposed in the filter chamber 154 and spaced apart from a peripheral edge of an opening of the outer passage 159c which is open to the filter chamber 154, so that a space 161 is created on the opening edge side of the filter chamber 154.Type: ApplicationFiled: July 30, 2010Publication date: February 10, 2011Applicant: MAKITA CORPORATIONInventors: Yasuhiro KAKIUCHI, Shinya Bito
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Publication number: 20090243241Abstract: A carrier for carrying a power tool may include a tool bit holder supporting at least one tool bit and a tool bit restraint device that is capable of preventing the at least one tool bit from being dropped out of the tool bit holder. The tool bit restraint device includes a tool bit restraint member. The tool bit restraint member is arranged and constructed so as to substantially uniformly press the at least one tool bit, thereby restraining the at least one tool bit.Type: ApplicationFiled: March 19, 2009Publication date: October 1, 2009Applicant: MAKITA CORPORATIONInventors: Takuo Arakawa, Shinsuke Tateyama, Takuya Sumi, Masao Miwa, Yasuhiro Kakiuchi
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Patent number: 6971455Abstract: A hammer drill (1) includes a lock plate (35) forward of a boss sleeve (13) and a swash bearing (14) which cooperates with the boss sleeve to convert the rotation of an intermediate shaft (5) on which the boss sleeve is mounted. The lock plate is mounted on the boss sleeve and selectively engages claws (23) of the boss sleeve (13) in a manner that permits its integral rotation with and axial slide with respect to the boss sleeve. The lock plate is additionally biased in the forward direction by a coil spring (38) so that when a clutch (19) is shifted forward in a drill mode, the lock plate also moves forward into engagement with a stopper (39) secured to an inner housing (4), preventing inadvertent rotation of the boss sleeve.Type: GrantFiled: November 20, 2003Date of Patent: December 6, 2005Assignee: Makita CorporationInventors: Mitsuyoshi Shibata, Masanori Furusawa, Yasuhiro Kakiuchi
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Publication number: 20040108123Abstract: A hammer drill (1) includes a lock plate (35) forward of a boss sleeve (13) and a swash bearing (14) which cooperates with the boss sleeve to convert the rotation of an intermediate shaft (5) on which the boss sleeve is mounted. The lock plate is mounted on the boss sleeve and selectively engages claws (23) of the boss sleeve (13) in a manner that permits its integral rotation with and axial slide with respect to the boss sleeve. The lock plate is additionally biased in the forward direction by a coil spring (38) so that when a clutch (19) is shifted forward in a drill mode, the lock plate also moves forward into engagement with a stopper (39) secured to an inner housing (4), preventing inadvertent rotation of the boss sleeve.Type: ApplicationFiled: November 20, 2003Publication date: June 10, 2004Applicant: Makita CorporationInventors: Mitsuyoshi Shibata, Masanori Furusawa, Yasuhiro Kakiuchi
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Publication number: 20040035010Abstract: A tool-less blade clamps (10, 50) may include a rod (2, 52) having a slot (2a, 2c, 52c) and a guide slot (2b, 52b) formed substantially perpendicularly to the slot (2a, 2c, 52c). A control member (20, 56) may be slidably disposed within the slot (2a, 2c, 52c) and a spring (21, 57) preferably biases the control member (20, 56) towards a forward portion of the slot (2a, 2c, 52c). The rod (2, 52) rotatably supports a sleeve (11, 53). Preferably, the sleeve (11, 53) being prevented from axially displacing with respect to the rod (2, 52) when the sleeve (11, 53) rotates about the rod (2, 52). An L-shaped slot (16, 53a) may be formed in the sleeve (11, 53) and may have a blade lock slot (16b, 53ab) disposed substantially perpendicularly to a blade lock control slot (16a, 53aa). The control member (20, 53) may include a pin (22, 55) that extends through the guide slot (2b, 52b) and travels within the L-shaped slot (16, 53a).Type: ApplicationFiled: September 2, 2003Publication date: February 26, 2004Applicant: MAKITA CORPORATIONInventors: Yasuhiro Kakiuchi, Shinsuke Mori
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Patent number: 6612039Abstract: A tool-less blade clamps (10, 50) may include a rod (2, 52) having a slot (2a, 2c, 52c) and a guide slot (2b, 52b) formed substantially perpendicularly to the slot (2a, 2c, 52c). A control member (20, 56) may be slidably disposed within the slot (2a, 2c, 52c) and a spring (21, 57) preferably biases the control member (20, 56) towards a forward portion of the slot (2a, 2c, 52c). The rod (2, 52) rotatably supports a sleeve (11, 53). Preferably, the sleeve (11, 53) being prevented from axially displacing with respect to the rod (2, 52) when the sleeve (11, 53) rotates about the rod (2, 52). An L-shaped slot (16, 53a) may be formed in the sleeve (11, 53) and may have a blade lock slot (16b, 53ab) disposed substantially perpendicularly to a blade lock control slot (16a, 53aa). The control member (20, 53) may include a pin (22, 55) that extends through the guide slot (2b, 52b) and travels within the L-shaped slot (16, 53a).Type: GrantFiled: May 15, 2001Date of Patent: September 2, 2003Assignee: Makita CorporationInventors: Yasuhiro Kakiuchi, Shinsuke Mori