Patents by Inventor Giang Vo
Giang Vo 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: 20240157706Abstract: Printheads and a method of operating a printhead. In one embodiment, a printhead comprises a plurality of jetting channels, a manifold internal to the printhead that is configured to convey a print fluid from an inlet of the printhead to the jetting channels, and an internal pump disposed at the manifold. The internal pump is configured to draw the print fluid into the manifold through the inlet, and to discharge the print fluid from the manifold to the jetting channels.Type: ApplicationFiled: January 24, 2024Publication date: May 16, 2024Applicant: Ricoh Company, Ltd.Inventor: Giang Vo
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Patent number: 11912041Abstract: Printheads and a method of operating a printhead. In one embodiment, a printhead comprises a plurality of jetting channels, a manifold internal to the printhead that is configured to convey a print fluid from an inlet of the printhead to the jetting channels, and an internal pump disposed at the manifold. The internal pump is configured to draw the print fluid into the manifold through the inlet, and to discharge the print fluid from the manifold to the jetting channels.Type: GrantFiled: December 17, 2021Date of Patent: February 27, 2024Assignee: Ricoh Company, Ltd.Inventor: Giang Vo
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Publication number: 20240009998Abstract: Printheads and design of printheads. In one embodiment, a printhead comprises a plurality of jetting channels, and a manifold apparatus fluidly coupled to the jetting channels. For each jetting channel, the printhead includes a first fluid path between the jetting channel and the manifold apparatus, and a second fluid path between the jetting channel and the manifold apparatus. The jetting channel is configured to jet a print fluid via pressure waves generated in a pressure chamber of the jetting channel. Lengths of the first fluid path and the second fluid path are different by a threshold length so that an arrival time of the pressure waves at the manifold apparatus are different by a threshold time.Type: ApplicationFiled: September 26, 2023Publication date: January 11, 2024Applicant: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Cesar Hurtado
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Patent number: 11801677Abstract: Printheads and design of printheads. In one embodiment, a printhead comprises a plurality of jetting channels, and a manifold apparatus fluidly coupled to the jetting channels. For each jetting channel, the printhead includes a first fluid path between the jetting channel and the manifold apparatus, and a second fluid path between the jetting channel and the manifold apparatus. The jetting channel is configured to jet a print fluid via pressure waves generated in a pressure chamber of the jetting channel. Lengths of the first fluid path and the second fluid path are different by a threshold length so that an arrival time of the pressure waves at the manifold apparatus are different by a threshold time.Type: GrantFiled: February 10, 2022Date of Patent: October 31, 2023Assignee: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Cesar Hurtado
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Publication number: 20230249460Abstract: Printheads and design of printheads. In one embodiment, a printhead comprises a plurality of jetting channels, and a manifold apparatus fluidly coupled to the jetting channels. For each jetting channel, the printhead includes a first fluid path between the jetting channel and the manifold apparatus, and a second fluid path between the jetting channel and the manifold apparatus. The jetting channel is configured to jet a print fluid via pressure waves generated in a pressure chamber of the jetting channel. Lengths of the first fluid path and the second fluid path are different by a threshold length so that an arrival time of the pressure waves at the manifold apparatus are different by a threshold time.Type: ApplicationFiled: February 10, 2022Publication date: August 10, 2023Applicant: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Cesar Hurtado
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Publication number: 20230191792Abstract: Printheads and a method of operating a printhead. In one embodiment, a printhead comprises a plurality of jetting channels, a manifold internal to the printhead that is configured to convey a print fluid from an inlet of the printhead to the jetting channels, and an internal pump disposed at the manifold. The internal pump is configured to draw the print fluid into the manifold through the inlet, and to discharge the print fluid from the manifold to the jetting channels.Type: ApplicationFiled: December 17, 2021Publication date: June 22, 2023Applicant: Ricoh Company, Ltd.Inventor: Giang Vo
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Patent number: 11571892Abstract: Printheads and manifolds within printheads. In one embodiment, a method comprises determining a resonant frequency of jetting channels for a printhead, and selecting a target length for a manifold fluidly coupled to the jetting channels such that resonant frequencies of the manifold differ from the resonant frequency of the jetting channels by a threshold amount.Type: GrantFiled: March 8, 2021Date of Patent: February 7, 2023Assignee: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Cesar Hurtado
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Publication number: 20220281222Abstract: Printheads and manifolds within printheads. In one embodiment, a method comprises determining a resonant frequency of jetting channels for a printhead, and selecting a target length for a manifold fluidly coupled to the jetting channels such that resonant frequencies of the manifold differ from the resonant frequency of the jetting channels by a threshold amount.Type: ApplicationFiled: March 8, 2021Publication date: September 8, 2022Applicant: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Cesar Hurtado
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Patent number: 9833994Abstract: An inkjet head that is able to circulate ink. The inkjet head includes a diaphragm plate, a first restrictor plate, one or more chamber plates, a second restrictor plate, and an orifice plate. The orifice plate forms a plurality of nozzles. The chamber plates form a plurality of chambers corresponding with the nozzles, and also form a return manifold for receiving ink from the chambers when circulating the ink through the inkjet head. The diaphragm plate forms a diaphragm that seals the chambers. The first restrictor plate controls a flow of ink between the chambers and the return manifold to circulate the ink through the inkjet head. The second restrictor plate controls the flow of ink between a supply manifold and the chambers.Type: GrantFiled: March 14, 2017Date of Patent: December 5, 2017Assignee: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Connor Matsumori
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Publication number: 20170182777Abstract: An inkjet head that is able to circulate ink. The inkjet head includes a diaphragm plate, a first restrictor plate, one or more chamber plates, a second restrictor plate, and an orifice plate. The orifice plate forms a plurality of nozzles. The chamber plates form a plurality of chambers corresponding with the nozzles, and also form a return manifold for receiving ink from the chambers when circulating the ink through the inkjet head. The diaphragm plate forms a diaphragm that seals the chambers. The first restrictor plate controls a flow of ink between the chambers and the return manifold to circulate the ink through the inkjet head. The second restrictor plate controls the flow of ink between a supply manifold and the chambers.Type: ApplicationFiled: March 14, 2017Publication date: June 29, 2017Applicant: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Connor Matsumori
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Patent number: 9630408Abstract: An inkjet head that is able to circulate ink. The inkjet head includes a diaphragm plate, a first restrictor plate, one or more chamber plates, a second restrictor plate, and an orifice plate. The orifice plate forms a plurality of nozzles. The chamber plates form a plurality of chambers corresponding with the nozzles, and also form a return manifold for receiving ink from the chambers when circulating the ink through the inkjet head. The diaphragm plate forms a diaphragm that seals the chambers. The first restrictor plate controls a flow of ink between the chambers and the return manifold to circulate the ink through the inkjet head. The second restrictor plate controls the flow of ink between a supply manifold and the chambers.Type: GrantFiled: January 26, 2016Date of Patent: April 25, 2017Assignee: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Connor Matsumori
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Patent number: 9604457Abstract: An inkjet head that is able to circulate ink. The inkjet head includes a diaphragm plate, a first restrictor plate, one or more chamber plates, a second restrictor plate, and an orifice plate. The orifice plate forms a plurality of nozzles. The chamber plates form a plurality of chambers corresponding with the nozzles, and also form a return manifold for receiving ink from the chambers when circulating the ink through the inkjet head. The diaphragm plate forms a diaphragm that seals the chambers. The first restrictor plate controls a flow of ink between the chambers and the return manifold to circulate the ink through the inkjet head. The second restrictor plate controls the flow of ink between a supply manifold and the chambers.Type: GrantFiled: January 26, 2016Date of Patent: March 28, 2017Assignee: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Connor Matsumori
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Publication number: 20160136154Abstract: The present invention generally provides a method of treatment and improvement of quality of life for patients adversely affected by various pain conditions. One preferred embodiment provides a method of treatment of acute pain, moderate to moderately severe pain, chronic pain, non-cancer pain, osteoarthritic pain, bunionectomy pain or lower back pain in a patient in need thereof, comprising providing at least one or two dosage form having about 15 mg of hydrocodone and its salt and about 500 mg of acetaminophen, once, twice or thrice daily. Preferably, the dosage form is about 30 mg of hydrocodone and about 1000 mg of acetaminophen taken twice daily. Alternatively, the dosage form is about 15 mg of hydrocodone and about 500 mg of acetaminophen taken twice daily.Type: ApplicationFiled: November 19, 2015Publication date: May 19, 2016Inventors: Rita I. Jain, Andrea E. Best, Earle Lockhart, Steven E. Marx, James W. Thomas, Pamela Giang Vo
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Publication number: 20160136955Abstract: An inkjet head that is able to circulate ink. The inkjet head includes a diaphragm plate, a first restrictor plate, one or more chamber plates, a second restrictor plate, and an orifice plate. The orifice plate forms a plurality of nozzles. The chamber plates form a plurality of chambers corresponding with the nozzles, and also form a return manifold for receiving ink from the chambers when circulating the ink through the inkjet head. The diaphragm plate forms a diaphragm that seals the chambers. The first restrictor plate controls a flow of ink between the chambers and the return manifold to circulate the ink through the inkjet head. The second restrictor plate controls the flow of ink between a supply manifold and the chambers.Type: ApplicationFiled: January 26, 2016Publication date: May 19, 2016Applicant: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Connor Matsumori
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Publication number: 20160136962Abstract: An inkjet head that is able to circulate ink. The inkjet head includes a diaphragm plate, a first restrictor plate, one or more chamber plates, a second restrictor plate, and an orifice plate. The orifice plate forms a plurality of nozzles. The chamber plates form a plurality of chambers corresponding with the nozzles, and also form a return manifold for receiving ink from the chambers when circulating the ink through the inkjet head. The diaphragm plate forms a diaphragm that seals the chambers. The first restrictor plate controls a flow of ink between the chambers and the return manifold to circulate the ink through the inkjet head. The second restrictor plate controls the flow of ink between a supply manifold and the chambers.Type: ApplicationFiled: January 26, 2016Publication date: May 19, 2016Applicant: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Connor Matsumori
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Patent number: 9272514Abstract: An inkjet head that is able to circulate ink. The inkjet head includes a diaphragm plate, a first restrictor plate, one or more chamber plates, a second restrictor plate, and an orifice plate. The orifice plate forms a plurality of nozzles. The chamber plates form a plurality of chambers corresponding with the nozzles, and also form a return manifold for receiving ink from the chambers when circulating the ink through the inkjet head. The diaphragm plate forms a diaphragm that seals the chambers. The first restrictor plate controls a flow of ink between the chambers and the return manifold to circulate the ink through the inkjet head. The second restrictor plate controls the flow of ink between a supply manifold and the chambers.Type: GrantFiled: April 24, 2014Date of Patent: March 1, 2016Assignee: Ricoh Company, Ltd.Inventors: Hiroshi Nishimura, Giang Vo, Connor Matsumori
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Patent number: 9226907Abstract: The present invention generally provides a method of treatment and improvement of quality of life for patients adversely affected by various pain conditions. One preferred embodiment provides a method of treatment of acute pain, moderate to moderately severe pain, chronic pain, non-cancer pain, osteoarthritic pain, bunionectomy pain or lower back pain in a patient in need thereof, comprising providing at least one or two dosage form having about 15 mg of hydrocodone and its salt and about 500 mg of acetaminophen, once, twice or thrice daily. Preferably, the dosage form is about 30 mg of hydrocodone and about 1000 mg of acetaminophen taken twice daily. Alternatively, the dosage form is about 15 mg of hydrocodone and about 500 mg of acetaminophen taken twice daily.Type: GrantFiled: February 4, 2009Date of Patent: January 5, 2016Assignee: AbbVie Inc.Inventors: Rita I. Jain, Andrea E. Best, Earle Lockhart, Steven E. Marx, James W. Thomas, Pamela Giang Vo
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Publication number: 20150306875Abstract: An inkjet head that is able to circulate ink. The inkjet head includes a diaphragm plate, a first restrictor plate, one or more chamber plates, a second restrictor plate, and an orifice plate. The orifice plate forms a plurality of nozzles. The chamber plates form a plurality of chambers corresponding with the nozzles, and also form a return manifold for receiving ink from the chambers when circulating the ink through the inkjet head. The diaphragm plate forms a diaphragm that seals the chambers. The first restrictor plate controls a flow of ink between the chambers and the return manifold to circulate the ink through the inkjet head. The second restrictor plate controls the flow of ink between a supply manifold and the chambers.Type: ApplicationFiled: April 24, 2014Publication date: October 29, 2015Applicant: RICOH PRINTING SYSTEMS AMERICA, INC.Inventors: Hiroshi Nishimura, Giang Vo, Connor Matsumori
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Publication number: 20100010030Abstract: The present invention generally provides a method of treatment and improvement of quality of life for patients adversely affected by various pain conditions. One preferred embodiment provides a method of treatment of acute pain, moderate to moderately severe pain, chronic pain, non-cancer pain, osteoarthritic pain, bunionectomy pain or lower back pain in a patient in need thereof, comprising providing at least one or two dosage form having about 15 mg of hydrocodone and its salt and about 500 mg of acetaminophen, once, twice or thrice daily. Preferably, the dosage form is about 30 mg of hydrocodone and about 1000 mg of acetaminophen taken twice daily. Alternatively, the dosage form is about 15 mg of hydrocodone and about 500 mg of acetaminophen taken twice daily.Type: ApplicationFiled: February 4, 2009Publication date: January 14, 2010Applicant: ABBOTT LABORATORIESInventors: Rita I. Jain, Andrea E. Best, Earle Lockhart, Steven E. Marx, James W. Thomas, Pamela Giang Vo
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Patent number: 5559539Abstract: An ink jet apparatus including a recording head having a jetting surface, an actuator positioned adjacent to the jetting surface, and a cleaning blade member coupled to the actuator by a self-aligning system. The actuator is adapted to move the wiping blade between a cleaning position in which the blade comes in contact with the jetting surface for wiping and a retracted position in which the wiping blade is separated from the jetting surface. The self-aligning system automatically aligns the edge of the blade substantially in parallel with the jetting surface in the cleaning position.Type: GrantFiled: October 12, 1993Date of Patent: September 24, 1996Assignee: Dataproducts CorporationInventors: Giang Vo, Akihiro Okada