Patents by Inventor Kunihiro Arai
Kunihiro Arai 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: 11135708Abstract: The present invention provides a screw feeding/fastening unit of a continuous screw fastening device which enables assuredly pulling screws out of a screw strip in tandem with a screw fastening operation even in case of using the screws each of which has, e.g., a flat shape below its head portion.Type: GrantFiled: November 29, 2018Date of Patent: October 5, 2021Assignee: MURO CORPORATIONInventors: Kunihiro Arai, Isamu Arai
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Patent number: 10737372Abstract: A screw rope is configured to hold fixed portions of threaded parts of respective screws so as to be obliquely disposed at predetermined parallel intervals and at a predetermined inclination angle by a belt-shaped member which runs in a length direction and binding strips which are provided on the rear surface side of the belt-shaped member at predetermined intervals, to continuously form a guide groove on the front surface side of the belt-shaped member along a length direction thereof, to dispose many upper recessed parts at a position above the guide groove in a scattered state and over the entire length on the front surface side of the belt-shaped member and to dispose many lower recessed parts at a position under the guide groove in the scattered state and over the entire length.Type: GrantFiled: December 14, 2017Date of Patent: August 11, 2020Assignee: MURO CORPORATIONInventors: Kunihiro Arai, Tomiaki Ochiai
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Patent number: 10569397Abstract: The present invention provides a successive screw fastener which enhances a screw fastening function and improves operability and rapidness of each element.Type: GrantFiled: April 25, 2017Date of Patent: February 25, 2020Assignee: MURO CORPORATIONInventors: Kunihiro Arai, Satoshi Mishima
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Patent number: 10364574Abstract: In a continuous screw tightening machine with washer stacking supply mechanism, in conjunction with retreating of a tightening machine, a washer is placed on a seat surface portion of a washer feeding body of a washer sequential supply mechanism and reliably supplied to a tightening possible position one by one and the one screw is supplied by a screw sequential supply mechanism between the washer and a bit so as to be in concentric arrangement, in conjunction with advancing of the tightening machine, the washer sequential supply mechanism is set to a feeding preparation attitude of the subsequent washer, and the screw sequential supply mechanism is constituted to be set to a feeding preparation attitude of the subsequent screw, and the screw is tightened and fixed together with the washer at the tightening target spot by rotation/driving of the bit advanced to the tightening possible position by a driving machine.Type: GrantFiled: July 28, 2015Date of Patent: July 30, 2019Assignee: MURO CORPORATIONInventors: Kunihiro Arai, Yoichi Watanabe
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Publication number: 20190176305Abstract: The present invention provides a screw feeding/fastening unit of a continuous screw fastening device which enables assuredly pulling screws out of a screw strip in tandem with a screw fastening operation even in case of using the screws each of which has, e.g., a flat shape below its head portion.Type: ApplicationFiled: November 29, 2018Publication date: June 13, 2019Applicant: MURO CORPORATIONInventors: Kunihiro ARAI, Isamu Arai
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Publication number: 20180178358Abstract: A screw rope is configured to hold fixed portions of threaded parts of respective screws so as to be obliquely disposed at predetermined parallel intervals and at a predetermined inclination angle by a belt-shaped member which runs in a length direction and binding strips which are provided on the rear surface side of the belt-shaped member at predetermined intervals, to continuously form a guide groove on the front surface side of the belt-shaped member along a length direction thereof, to dispose many upper recessed parts at a position above the guide groove in a scattered state and over the entire length on the front surface side of the belt-shaped member and to dispose many lower recessed parts at a position under the guide groove in the scattered state and over the entire length.Type: ApplicationFiled: December 14, 2017Publication date: June 28, 2018Applicant: MURO CORPORATIONInventors: Kunihiro Arai, Tomiaki Ochiai
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Publication number: 20170312896Abstract: The present invention provides a successive screw fastener which enhances a screw fastening function and improves operability and rapidness of each element.Type: ApplicationFiled: April 25, 2017Publication date: November 2, 2017Applicant: MURO CORPORATIONInventors: Kunihiro Arai, Satoshi Mishima
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Publication number: 20160032591Abstract: In a continuous screw tightening machine with washer stacking supply mechanism, in conjunction with retreating of a tightening machine, a washer is placed on a seat surface portion of a washer feeding body of a washer sequential supply mechanism and reliably supplied to a tightening possible position one by one and the one screw is supplied by a screw sequential supply mechanism between the washer and a bit so as to be in concentric arrangement, in conjunction with advancing of the tightening machine, the washer sequential supply mechanism is set to a feeding preparation attitude of the subsequent washer, and the screw sequential supply mechanism is constituted to be set to a feeding preparation attitude of the subsequent screw, and the screw is tightened and fixed together with the washer at the tightening target spot by rotation/driving of the bit advanced to the tightening possible position by a driving machine.Type: ApplicationFiled: July 28, 2015Publication date: February 4, 2016Inventors: Kunihiro ARAI, Yoichi WATANABE
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Patent number: 7415910Abstract: A continuous screw tightening machine including a driving machine (4) equipped with a grip handle (2); a tightening machine main body (3) with which a bit (7) for screw tightening is removably connected to the driving machine (4) through a reduction gear and a clutch; and a screw feed mechanism through which the bit (7) is rotatably inserted and which sequentially feeds a screw to the position where a tightening operation is to be carried out by the bit 7. The screw tightening machine also includes a screw feed mechanism main body (6) which is connected to the front of the tightening machine main body (3) so as to be slidable in the longitudinal direction, a screw supply mechanism (110) which continuously supplies a number of single-part screws in sequence to the screw feed mechanism under the force of gravity, and a tip block (12) which is connected to the screw feed mechanism main body, providing a surface to be contacted with an object.Type: GrantFiled: September 13, 2005Date of Patent: August 26, 2008Assignee: Muro CorporationInventor: Kunihiro Arai
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Publication number: 20060053978Abstract: A continuous screw tightening machine which is capable of precisely feeding single-part screws without the need for using a conventional screw gang element containing a number of screws arranged at prescribed intervals in a row by means of a belt-like member, and is capable of continuously and efficiently screwing-in screws into a plate material or other object.Type: ApplicationFiled: September 13, 2005Publication date: March 16, 2006Inventor: Kunihiro Arai
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Patent number: 5825048Abstract: A semiconductor functional device includes a semi-insulating semiconductor substrate; a resonant tunneling structure which includes, on the substrate, an n-type collector layer, an epitaxial multilayer structure including a double barrier structure constituted of a plurality of barrier layers holding a well layer therebetween, and an n-type emitter layer; an emitter electrode formed on the emitter layer; and a collector electrode formed on the collector layer. An undoped semiconductor barrier layer is interposed between the semi-insulating semiconductor substrate and the collector layer.Type: GrantFiled: June 21, 1996Date of Patent: October 20, 1998Assignee: Nippon Telegraph and Telephone CorporationInventor: Kunihiro Arai
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Patent number: 5770958Abstract: A first partial circuit is formed by grounding the emitter electrode of a first negative differential resistive element, connecting the emitter electrode of a second negative differential resistive element to the collector electrode of the first negative differential resistive element, and connecting a first field-effect transistor in parallel with the first negative differential resistive element. A second partial circuit is formed by grounding the emitter electrode of a third negative differential resistive element, connecting the emitter electrode of a fourth negative differential resistive element to the collector electrode of the third negative differential resistive element, and connecting a second field-effect transistor in parallel with the third negative differential resistive element. An output from the first partial circuit is input to the input of the second partial circuit. The inversion of the output of the second partial circuit is input to the input of the first partial circuit.Type: GrantFiled: April 1, 1997Date of Patent: June 23, 1998Assignee: Nippon Telegraph and Telephone CorporationInventors: Kunihiro Arai, Hideaki Matsuzaki
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Patent number: 5151757Abstract: A heterojunction field-effect transistor includes a first electron transit channel formation semiconductor layer formed on a substrate and consisting of a compound semiconductor, a first electron supply semiconductor layer formed on the first electron transit channel formation semiconductor layer and consisting of a compound semiconductor, a gate electrode, a source electrode, and a drain electrode formed on the first electron supply semiconductor layer, and a second electron transit channel formation semiconductor layer formed between the substrate and the first electron transit channel formation semiconductor layer.Type: GrantFiled: October 24, 1991Date of Patent: September 29, 1992Assignee: Nippon Telegraph and Telephone CorporationInventors: Takatomo Enoki, Naoteru Shigekawa, Kunihiro Arai
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Patent number: D440137Type: GrantFiled: September 25, 2000Date of Patent: April 10, 2001Assignee: Muro CorporationInventors: Giichiro Muro, Hideki Fujita, Kunihiro Arai
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Patent number: D782257Type: GrantFiled: September 22, 2014Date of Patent: March 28, 2017Assignee: MURO CORPORATIONInventors: Kunihiro Arai, Yoichi Watanabe