Patents by Inventor Yoshimitsu Iijima
Yoshimitsu Iijima 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: 11623330Abstract: A driving tool without necessary to secure an arrangement space dedicated to an actuator is provided. A driving tool includes: a striking unit movable to strike a fastener; a housing for supporting the striking unit; a trigger provided in the housing; a push lever provided in the housing, and a trigger valve, and the driving tool further includes: a slide member provided in the trigger; and a solenoid provided in the trigger and configured to move the slide member.Type: GrantFiled: August 2, 2019Date of Patent: April 11, 2023Assignee: KOKI HOLDINGS CO., LTD.Inventors: Kazuhiro Ootsuka, Yoshimitsu Iijima
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Patent number: 11331779Abstract: 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: GrantFiled: February 24, 2020Date of Patent: May 17, 2022Assignee: Koki Holdings Co., Ltd.Inventors: Yoshimitsu Iijima, Hiroki Kitagawa
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Publication number: 20210308851Abstract: A driving tool without necessary to secure an arrangement space dedicated to an actuator is provided. A driving tool includes: a striking unit movable to strike a fastener; a housing for supporting the striking unit; a trigger provided in the housing; a push lever provided in the housing, and a trigger valve, and the driving tool further includes: a slide member provided in the trigger; and a solenoid provided in the trigger and configured to move the slide member.Type: ApplicationFiled: August 2, 2019Publication date: October 7, 2021Inventors: Kazuhiro OOTSUKA, Yoshimitsu IIJIMA
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Publication number: 20200189079Abstract: 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: ApplicationFiled: February 24, 2020Publication date: June 18, 2020Applicant: Koki Holdings Co., Ltd.Inventors: Yoshimitsu IIJIMA, Hiroki KITAGAWA
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Patent number: 10569402Abstract: 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: GrantFiled: January 24, 2017Date of Patent: February 25, 2020Assignee: KOKI HOLDINGS CO., LTD.Inventors: Yoshimitsu Iijima, Hiroki Kitagawa
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Patent number: 10232498Abstract: A driving machine is provided to prevent clogging of a fastener in an ejection passage without increasing the total length of the ejection passage. A nail driving machine includes: a nose part forming an upper portion of an ejection passage through which a nail passes; a contact part being slidable along the nose part and forming a lower portion of the ejection passage; a driver blade striking a head part of the nail supplied to the ejection passage; and a guide part disposed in a lower portion of the nose part and guiding the nail passing through the ejection passage. The guide part has a guide surface inclining to protrude from a radial outer side toward a radial inner side of the ejection passage. A housing groove is formed in the contact part and the guide part enters the housing groove when the contact part slides along the nose part.Type: GrantFiled: November 25, 2015Date of Patent: March 19, 2019Assignee: Koki Holdings Co., Ltd.Inventors: Masashi Nishida, Yoshimitsu Iijima, Masaya Nagao
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Publication number: 20170209995Abstract: 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: ApplicationFiled: January 24, 2017Publication date: July 27, 2017Applicant: HITACHI KOKI CO., LTD.Inventors: Yoshimitsu IIJIMA, Hiroki KITAGAWA
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Publication number: 20160151901Abstract: A driving machine is provided to prevent clogging of a fastener in an ejection passage without increasing the total length of the ejection passage. A nail driving machine includes: a nose part forming an upper portion of an ejection passage through which a nail passes; a contact part being slidable along the nose part and forming a lower portion of the ejection passage; a driver blade striking a head part of the nail supplied to the ejection passage; and a guide part disposed in a lower portion of the nose part and guiding the nail passing through the ejection passage. The guide part has a guide surface inclining to protrude from a radial outer side toward a radial inner side of the ejection passage. A housing groove is formed in the contact part and the guide part enters the housing groove when the contact part slides along the nose part.Type: ApplicationFiled: November 25, 2015Publication date: June 2, 2016Applicant: Hitachi Koki Co.,Ltd.Inventors: MASASHI NISHIDA, YOSHIMITSU IIJIMA, MASAYA NAGAO
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Patent number: 9061408Abstract: A rigid member is configured to move a valve member to separate the valve member from an engaging part when a push lever moves from a lower dead center to an upper dead center. A resilient member is configured to move the valve member to separate the valve member from the engaging part when the push lever moves from the lower dead center to the upper dead center. A switching part selects one of the rigid member and the resilient member to move the valve member to separate the valve member from the engaging part. When the switching part selects the rigid member, a fastener driving operation is performed regardless of an order of a pulling operation and a pressing operation. When the switching part selects the resilient member, the fastener driving operation is performed only when the pulling operation is executed after the pressing operation is executed.Type: GrantFiled: November 22, 2011Date of Patent: June 23, 2015Assignee: HITACHI KOKI CO., LTD.Inventors: Yoshinori Ishizawa, Haruhiko Oouchi, Yoshimitsu Iijima
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Patent number: 8960516Abstract: A fastener driving tool is capable of not only linearly driving but also rotationally fastening a fastener into a workpiece P. The fastener driving tool includes a housing 2, a nose portion 40 formed with an injection passage 40a through which a fastener 41 is driven, a magazine 4 accommodating fasteners 41 and supplying a fastener 41 to the nose portion 40, a push lever 5 movable relative to the housing 2 upon depression against the workpiece P, combustion chamber frames 12, 22 movable in the housing 2 in accordance with the movement of the push lever 5, and first and second cylinders 7, 8 fixed to the housing 2. First and second pistons 71, 81 are movably disposed in the first and second cylinders 7,8, respectively, and a bit 9 extends from the first piston 71. A rod 14 formed with a rack 14A extends from the second piston 72. The rack 14A is engageable with a motion conversion mechanism 6 for converting a linear motion of the rod 14 into rotational motion of the bit 9.Type: GrantFiled: September 15, 2010Date of Patent: February 24, 2015Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshimitsu Iijima, Norikazu Baba, Yasuki Ohmori, Shouichi Hirai
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Patent number: 8397970Abstract: The present application relates to a driving machine. The driving machine has a driver blade for striking a fastener and a nose portion having formed therein an injection passage which slidably guides the driver blade, and into which the fastener is fed to be injected therefrom. An injection hole from which the fastener is injected is specified at a leading end in an injecting direction of the injection passage. The injection hole is defined by a first guide portion and a second guide portion which is movable relative to the first guide portion so as to change a cross section, perpendicular to the injecting direction, of the injection hole. A positioning apparatus is provided to dispose the second guide portion at a plurality of positions relative to the first guide portion.Type: GrantFiled: February 27, 2012Date of Patent: March 19, 2013Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshimitsu Iijima, Isamu Tanji
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Publication number: 20120298712Abstract: A rigid member is configured to move a valve member to separate the valve member from an engaging part when a push lever moves from a lower dead center to an upper dead center. A resilient member is configured to move the valve member to separate the valve member from the engaging part when the push lever moves from the lower dead center to the upper dead center. A switching part selects one of the rigid member and the resilient member to move the valve member to separate the valve member from the engaging part. When the switching part selects the rigid member, a fastener driving operation is performed regardless of an order of a pulling operation and a pressing operation. When the switching part selects the resilient member, the fastener driving operation is performed only when the pulling operation is executed after the pressing operation is executed.Type: ApplicationFiled: November 22, 2011Publication date: November 29, 2012Applicant: Hitachi Koki Co., Ltd.Inventors: Yoshinori Ishizawa, Haruhiko Oouchi, Yoshimitsu Iijima
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Publication number: 20120181319Abstract: A fastener driving tool is capable of not only linearly driving but also rotationally fastening a fastener into a workpiece P. The fastener driving tool includes a housing 2, a nose portion 40 formed with an injection passage 40a through which a fastener 41 is driven, a magazine 4 accommodating fasteners 41 and supplying a fastener 41 to the nose portion 40, a push lever 5 movable relative to the housing 2 upon depression against the workpiece P, combustion chamber frames 12, 22 movable in the housing 2 in accordance with the movement of the push lever 5, and first and second cylinders 7, 8 fixed to the housing 2. First and second pistons 71, 81 are movably disposed in the first and second cylinders 7,8, respectively, and a bit 9 extends from the first piston 71. A rod 14 formed with a rack 14A extends from the second piston 72. The rack 14A is engageable with a motion conversion mechanism 6 for converting a linear motion of the rod 14 into rotational motion of the bit 9.Type: ApplicationFiled: September 15, 2010Publication date: July 19, 2012Applicant: Hitachi Koki Co., Ltd.Inventors: Yoshimitsu Iijima, Norikazu Baba, Yasuki Ohmori, Shouichi Hirai
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Publication number: 20120153004Abstract: A driving machine including: a driver blade for striking a fastener; and a nose portion having formed therein an injection passage which slidably guides the driver blade, and into which the fastener is fed to be injected therefrom, wherein an injection hole from which the fastener is injected is specified at a leading end in an injecting direction of the injection passage, wherein the injection hole being defined by a first guide portion and a second guide portion which is movable relative to the first guide portion so as to change a cross section, perpendicular to the injecting direction, of the injection hole, and wherein a positioning apparatus is provided to dispose the second guide portion at a plurality of positions relative to the first guide portion.Type: ApplicationFiled: February 27, 2012Publication date: June 21, 2012Applicant: Hitachi Koki Co., Ltd.Inventors: Yoshimitsu IIJIMA, Isamu Tanji
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Patent number: 8123096Abstract: A driving machine including: a driver blade for striking a fastener; and a nose portion having formed therein an injection passage which slidably guides the driver blade, and into which the fastener is fed to be injected therefrom, wherein an injection hole from which the fastener is injected is specified at a leading end in an injecting direction of the injection passage, wherein the injection hole being defined by a first guide portion and a second guide portion which is movable relative to the first guide portion so as to change a cross section, perpendicular to the injecting direction, of the injection hole, and wherein a positioning apparatus is provided to dispose the second guide portion at a plurality of positions relative to the first guide portion.Type: GrantFiled: September 12, 2008Date of Patent: February 28, 2012Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshimitsu Iijima, Isamu Tanji
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Patent number: 7980439Abstract: According to an aspect of the present invention, there is provided a nailing machine including: a housing; an ejection section in the housing; an activation lever provided in the ejection section to be movable inside a traveling course; a magazine holding nails; a feeder urging the nails to feed the nails; and an engagement member engaged with the feeder so that, when an amount of remaining nails becomes to a predetermined number, the engagement member is moved toward a first direction to protrude into the traveling course; wherein one of the activation lever and the engagement member includes a slope portion so that the engagement member is further moved toward the first direction through the sliding contact therebetween.Type: GrantFiled: May 9, 2008Date of Patent: July 19, 2011Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshitaka Akiba, Yoshimitsu Iijima
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Publication number: 20090072000Abstract: According to an aspect of the present invention, there is provided a driving machine including: a driver blade for striking a fastener; and a nose portion having formed therein an injection passage which slidably guides the driver blade, and into which the fastener is fed to be injected therefrom, wherein an injection hole from which the fastener is injected is specified at a leading end in an injecting direction of the injection passage, wherein the injection hole being defined by a first guide portion and a second guide portion which is movable relative to the first guide portion so as to change a cross section, perpendicular to the injecting direction, of the injection hole, and wherein a disposing means is provided to dispose the second guide portion at a plurality of positions relative to the first guide portion.Type: ApplicationFiled: September 12, 2008Publication date: March 19, 2009Inventors: Yoshimitsu IIJIMA, Isamu Tanji
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Publication number: 20080308593Abstract: The combustion type power tool includes a housing accommodating a combustion chamber and an ignition plug for igniting a combustion gas supplied into the combustion chamber. In the housing is defined a lithium ion battery accommodating part for causing the ignition plug to generate ignition energy. The housing includes a handle part. The lithium ion battery accommodating part is arranged at the free end of the handle part.Type: ApplicationFiled: March 14, 2008Publication date: December 18, 2008Inventors: Yoshitaka Akiba, Haruhisa Fujisawa, Yoshimitsu Iijima, Norikazu Baba
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Patent number: D804924Type: GrantFiled: August 10, 2016Date of Patent: December 12, 2017Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshimitsu Iijima, Masaaki Furumi