Patents by Inventor Toru Kakiuchi
Toru 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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Publication number: 20240359463Abstract: There is provided a liquid droplet ejecting head including: a channel member having a plurality of individual channels and a first common channel communicating with an inlet port of each of the plurality of individual channels; and a piezoelectric element arranged on the channel member. Each of the plurality of individual channels includes a nozzle, a pressure chamber communicating with the nozzle and a first communicating channel having an end which is the inlet port and the other end which communicates with the pressure chamber. The piezoelectric element is configured to apply a pressure to a liquid inside the pressure chamber to cause a liquid droplet of the liquid to be ejected from the nozzle. A channel resistance R1 [N s/m5] of the first communicating channel satisfies a first relational expression: 3.48×1013?R1?6.98×1013.Type: ApplicationFiled: April 11, 2024Publication date: October 31, 2024Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: TAISUKE MIZUNO, TORU KAKIUCHI, TAKAAKI YOSHINO
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Publication number: 20240359462Abstract: There is provided a liquid droplet ejecting head including: a channel member having a channel which includes a nozzle and a pressure chamber communicating with the nozzle; and a piezoelectric element arranged on the channel member and configured to apply a pressure to a liquid inside the pressure chamber to eject a liquid droplet of the liquid from the nozzle. A diameter D [?m] of the nozzle and a natural frequency Fr [kHz] of the channel satisfy Expressions 1 and 2 as follows: Expression 1: D??2.25×10?8×Fr4+2.11×10?5×Fr3?7.60×10?3×Fr2+1.32×Fr?62.9, Expression 2: D?0.050×Fr+8.5.Type: ApplicationFiled: April 8, 2024Publication date: October 31, 2024Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: TAKAAKI YOSHINO, TORU KAKIUCHI, TAISUKE MIZUNO
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Publication number: 20240322027Abstract: A conductor layer is positioned between a gate electrode and a drain electrode. The conductor layer contacts a nitride semiconductor layer. The conductor layer is electrically connected with the drain electrode. The drain electrode includes a first part contacting the nitride semiconductor layer, and a second part positioned further toward the conductor layer side than the first part in a first direction. An insulating film includes a portion positioned between the conductor layer and the drain electrode. The second part is located on the portion of the insulating film.Type: ApplicationFiled: August 23, 2023Publication date: September 26, 2024Inventors: Hitoshi KOBAYASHI, Masaaki ONOMURA, Toru SUGIYAMA, Akira YOSHIOKA, Yasuhiro ISOBE, Tetsuya OHNO, Hideki SEKIGUCHI, Hung HUNG, Yorito KAKIUCHI
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Publication number: 20240294010Abstract: A liquid droplet discharging head includes: a channel member having a channel including a nozzle and a pressure chamber communicating with the nozzle; and a piezoelectric element fixed to the channel member and configured to apply pressure to liquid inside the pressure chamber to discharge liquid droplets of the liquid from the nozzle. A natural frequency Fr of the channel is not less than 250 kHz; and a diameter D [?m] of the nozzle has a relationship of the following expression (1) with the natural frequency Fr [kHz]: 0.0446×Fr+7.5?0.0446×Fr+13.5 . . . (1).Type: ApplicationFiled: December 4, 2023Publication date: September 5, 2024Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: TAKAAKI YOSHINO, TORU KAKIUCHI, TAISUKE MIZUNO
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Publication number: 20240278557Abstract: A liquid droplet discharging apparatus includes: a channel member having a nozzle and a pressure chamber; an actuator which applies pressure to liquid inside the pressure chamber; and a controller which applies a driving signal to the actuator. Within one discharging cycle, the driving signal includes: a main pulse for causing a liquid droplet to be discharged from the nozzle; and a cancel pulse which is applied to the actuator after the main pulse. In a case that a driving frequency of the driving signal is f (unit: kHz), a time from an end point of the main pulse to a start point of the cancel pulse is Tw (unit: ?sec) and a width of the cancel pulse is Tc (unit: ?sec), the following expressions (1) and (2) hold: 50?f??11.3×(Tw+Tc)+120 . . . (1); and Tw+Tc?5.2 . . . (2).Type: ApplicationFiled: November 30, 2023Publication date: August 22, 2024Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: TAKAAKI YOSHINO, TORU KAKIUCHI
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Patent number: 12059895Abstract: A liquid discharging head includes a channel member which has a plurality of individual channels, each of the plurality of individual channels having a pressure chamber communicating with a nozzle, and a piezoelectric actuator which is configured to make the liquid discharge from the nozzle by causing a change in a pressure on a liquid inside the pressure chamber. The piezoelectric actuator has a thin-film piezoelectric element, and when a Helmholtz natural frequency of the pressure chamber is let to be Fr (kHz) and a diameter of the nozzle is let to be D (?m), a relationship D<?0.0313×Fr+25.62 (provided that, 100 kHz?Fr) is satisfied, and a viscosity of the liquid discharged from the nozzle is not higher than 5 mPa·s.Type: GrantFiled: January 31, 2022Date of Patent: August 13, 2024Assignee: Brother Kogyo Kabushiki KaishaInventor: Toru Kakiuchi
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Publication number: 20240246335Abstract: A liquid droplet ejecting device includes a channel member and an actuator. The channel member has a channel. The channel includes a nozzle and a pressure chamber communicating with the nozzle. The actuator is on the channel member and configured to apply a pressure to a liquid in the pressure chamber. A diameter of the nozzle and a natural frequency of the channel are parameters of the liquid droplet ejecting device to satisfy that (1) the actuator has a threshold drive frequency of 100 kHz or more, (2) the nozzle ejects a liquid droplet having a volume of 1.8 pl or more, and (3) the Ohnesorge number is 0.2 or more.Type: ApplicationFiled: March 13, 2023Publication date: July 25, 2024Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Takaaki YOSHINO, Toru KAKIUCHI, Taisuke MIZUNO
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Patent number: 11833828Abstract: A liquid discharge head includes: nozzles aligned on a nozzle surface; a supply manifold configured that a liquid is supplied therein from the outside of the liquid discharge head; a return manifold which is arranged between the nozzle surface and the supply manifold in a first direction, which is configured that the liquid is flown out therefrom to the outside of the liquid discharge head, and which is provided with a return damper part; and individual flow channels each of which corresponds to one of the nozzles. Each of the individual flow channels has a return throttle channel communicating the corresponding nozzle with the return manifold and being arranged between the return manifold and the nozzle surface in the first direction. The return manifold has a compliance larger than a compliance of the supply manifold.Type: GrantFiled: October 12, 2021Date of Patent: December 5, 2023Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Takaaki Yoshino, Toru Kakiuchi, Jiro Yamamoto, Taisuke Mizuno, Shotaro Kanzaki
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Patent number: 11712893Abstract: A liquid discharge head is provided, the liquid discharge head comprising a plurality of individual channels, a first manifold connected to the plurality of individual channels, a second manifold connected to the plurality of individual channels, and a bypass channel connecting the first manifold and the second manifold and being distinct from the individual channels. A flow channel resistance Rct brought about by the plurality of individual channels, a flow channel resistance Rbp of the bypass channel, a bending loss ?P provided when the liquid flows from the first manifold via the bypass channel to the second manifold, and a flow rate Q of the liquid flowing through the bypass channel fulfill a relationship of: 0.5<[Rct/(Rbp+(?P/Q))]<2.0.Type: GrantFiled: November 23, 2021Date of Patent: August 1, 2023Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Shotaro Kanzaki, Toru Kakiuchi, Takaaki Yoshino, Taisuke Mizuno, Jiro Yamamoto
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Patent number: 11679586Abstract: There is provided a liquid discharge head including: a plurality of first individual channels; a first supply manifold; a first return manifold; a plurality of second individual channels; a second supply manifold; a second return manifold; and a first bypass channel communicating the first supply manifold and the second return manifold. The first bypass channel includes: a first supply connecting channel, a first return connecting channel, and a first connecting channel. Channel resistance in one of the first supply connecting channel and the first return connecting channel is greater than channel resistance in the first connecting channel.Type: GrantFiled: September 23, 2021Date of Patent: June 20, 2023Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Shotaro Kanzaki, Toru Kakiuchi, Takaaki Yoshino, Taisuke Mizuno, Jiro Yamamoto
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Patent number: 11679588Abstract: A liquid discharging head includes: a first common channel, a second common channel; and individual channels. The individual channels have: nozzles aligned in a first direction; pressure chambers; descenders formed in a channel substrate arranged between a nozzle plate and a pressure chamber plate in a second direction orthogonal to the first direction; and a connecting channel. The connecting channel has: a first channel part formed in the nozzle plate, and a second channel part formed in the channel substrate, connected to the first channel part and having a length in the second direction which is shorter than that of the second common channel. The second common channel is formed in the channel substrate, overlaps with the descenders in a third direction orthogonal to both of the first direction and the second direction, and is partitioned from the descenders by a partition wall formed by the channel substrate.Type: GrantFiled: October 13, 2021Date of Patent: June 20, 2023Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventor: Toru Kakiuchi
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Patent number: 11654679Abstract: A liquid discharging apparatus includes: liquid discharging modules which are arranged in a first direction along a predetermined plane; and a wiring member commonly joined to the liquid discharging modules. The wiring member includes: first parts joined to the liquid discharging modules, respectively, in a state that the first parts are arranged side by side in the first direction along the predetermined plane; second parts; and a sixth part. The second parts include: third parts extending from the first parts, respectively, in a second direction orthogonal to the first direction and along the predetermined plane, fourth parts extending in a third direction away from the predetermined plane, and fifth parts connected to the third parts and the fourth parts, respectively. Width in the first direction of each of the second parts is smaller than width in the first direction of the sixth part.Type: GrantFiled: February 24, 2022Date of Patent: May 23, 2023Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventor: Toru Kakiuchi
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Patent number: 11548279Abstract: There is provided a liquid discharge head, including: a pressure chamber connected to a nozzle from which a liquid is discharged; an actuator configured to apply discharge pressure to the liquid in the pressure chamber; a first supply channel which is connected to the pressure chamber, and through which a first liquid is supplied to the pressure chamber; a second supply channel, different from the first channel, which is connected to the pressure chamber, and through which a second liquid different from the first liquid is supplied to the pressure chamber; a first valve which is disposed in the first supply channel, and by which the first supply channel is opened and closed; and a second valve which is disposed in the second supply channel, and by which the second supply channel is opened and closed.Type: GrantFiled: February 16, 2021Date of Patent: January 10, 2023Assignee: Brother Kogyo Kabushiki KaishaInventors: Shingo Katayama, Toru Kakiuchi
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Patent number: 11535033Abstract: A liquid discharge head includes a common flow channel extending along a first direction, and individual flow channels arranged along the first direction. Each individual flow channel includes a first pressure chamber and a second pressure chamber arranged along the first direction, each of which communicates with the common flow channel, a nozzle located away from the first and second pressure chambers in a second direction orthogonal to the first direction, and a connection flow channel connecting the first pressure chamber, the second pressure chamber, and the nozzle with each other. One end of the connection flow channel in the second direction communicates with the first pressure chamber and the second pressure chamber, and the other end thereof in the second direction communicates with the nozzle. The connection flow channel extends along the second direction from the one end to the other end thereof in the second direction.Type: GrantFiled: December 23, 2020Date of Patent: December 27, 2022Assignee: Brother Kogyo Kabushiki KaishaInventors: Taiki Tanaka, Toru Kakiuchi
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Patent number: 11515464Abstract: There is provided a piezoelectric actuator, including: a vibration plate; a first piezoelectric body; a second piezoelectric body; a first electrode disposed on a first surface of the first piezoelectric body; a second electrode disposed on a second surface of the second piezoelectric body; an intermediate electrode disposed on an intermediate surface of the first piezoelectric body and overlapping with the first and second electrodes; an intermediate trace connected to the intermediate electrode on the intermediate surface and drawn out to one side in a first direction beyond the first piezoelectric body and the second piezoelectric body; a first trace overlapping with the intermediate trace in the thickness direction and being conducted with the intermediate trace; and a second trace overlapping with the intermediate trace in the thickness direction and being conducted with the intermediate trace.Type: GrantFiled: November 27, 2019Date of Patent: November 29, 2022Assignee: Brother Kogyo Kabushiki KaishaInventor: Toru Kakiuchi
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Publication number: 20220314616Abstract: A liquid discharging head includes a channel member which has a plurality of individual channels, each of the plurality of individual channels having a pressure chamber communicating with a nozzle, and a piezoelectric actuator which is configured to make the liquid discharge from the nozzle by causing a change in a pressure on a liquid inside the pressure chamber. The piezoelectric actuator has a thin-film piezoelectric element, and when a Helmholtz natural frequency of the pressure chamber is let to be Fr (kHz) and a diameter of the nozzle is let to be D (?m), a relationship D<?0.0313×Fr+25.62 (provided that, 100 kHz?Fr) is satisfied, and a viscosity of the liquid discharged from the nozzle is not higher than 5 mPa·s.Type: ApplicationFiled: January 31, 2022Publication date: October 6, 2022Inventor: Toru Kakiuchi
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Patent number: 11420439Abstract: There is provided a liquid discharge head, including: a plurality of inlet parts provided corresponding to a plurality of kinds of liquids; a plurality of pressure chambers in which discharge pressure is applied to the liquids; a plurality of individual outlet parts through which the liquids are supplied to the plurality of pressure chambers; and a manifold which communicates with the plurality of inlet parts, and through which the liquids from the plurality of inlet parts are supplied to the plurality of individual outlet parts. The manifold includes: a plurality of upstream-side portions in each of which a channel corresponding to one of the plurality of inlet parts is defined, and a downstream-side portion which communicates with the plurality of upstream-side portions, and in which a channel communicating with the plurality of individual outlet parts is defined.Type: GrantFiled: April 22, 2021Date of Patent: August 23, 2022Assignee: Brother Kogyo Kabushiki KaishaInventors: Shingo Katayama, Toru Kakiuchi
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Publication number: 20220203682Abstract: A liquid discharge head is provided, the liquid discharge head comprising a plurality of individual channels, a first manifold connected to the plurality of individual channels, a second manifold connected to the plurality of individual channels, and a bypass channel connecting the first manifold and the second manifold and being distinct from the individual channels. A flow channel resistance Rct brought about by the plurality of individual channels, a flow channel resistance Rbp of the bypass channel, a bending loss ?P provided when the liquid flows from the first manifold via the bypass channel to the second manifold, and a flow rate Q of the liquid flowing through the bypass channel fulfill a relationship of: 0.5<[Rct/(Rbp+(?P/Q))]<2.0.Type: ApplicationFiled: November 23, 2021Publication date: June 30, 2022Inventors: Shotaro KANZAKI, Toru KAKIUCHI, Takaaki YOSHINO, Taisuke MIZUNO, Jiro YAMAMOTO
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Patent number: 11367828Abstract: An actuator device includes: an actuator including piezoelectric elements arranged in a first direction and first contacts arranged in the first direction; a protector including a first wall opposed to the piezoelectric elements and a second wall coupled to the first wall and joined to a region of the actuator at which the first contacts are disposed; first connection terminals disposed on the first; and first through electrodes formed in the second wall to bring the first contacts and the first connection terminals into conduction with each other. A distance between two of the first through electrodes which respectively correspond to two of the piezoelectric elements which are adjacent to each other in the first direction is greater than a distance in the first direction between the two of the piezoelectric elements which are adjacent to each other in the first direction.Type: GrantFiled: November 10, 2020Date of Patent: June 21, 2022Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Toru Kakiuchi, Yasuo Kato, Rui Wang, Yuichi Ito
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Publication number: 20220176696Abstract: A liquid discharging apparatus includes: liquid discharging modules which are arranged in a first direction along a predetermined plane; and a wiring member commonly joined to the liquid discharging modules. The wiring member includes: first parts joined to the liquid discharging modules, respectively, in a state that the first parts are arranged side by side in the first direction along the predetermined plane; second parts; and a sixth part. The second parts include: third parts extending from the first parts, respectively, in a second direction orthogonal to the first direction and along the predetermined plane, fourth parts extending in a third direction away from the predetermined plane, and fifth parts connected to the third parts and the fourth parts, respectively. Width in the first direction of each of the second parts is smaller than width in the first direction of the sixth part.Type: ApplicationFiled: February 24, 2022Publication date: June 9, 2022Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventor: Toru KAKIUCHI