Patents by Inventor Wenzhuo Yan
Wenzhuo Yan 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: 9512531Abstract: A method of stripping, prepping and coating a surface includes first stripping the exiting coating from a surface, using continuous or pulsed fluid jet, followed by prepping the surface by the same fluid jet. The method also provides entraining particles into a fluid stream, if desired to generate a particle-entrained fluid stream that is directed at the surface to be stripped and prepped. The particles act as abrasive particles for prepping the surface to a prescribed surface roughness required for subsequent application of a coating to the surface. The method then entails coating the surface by electrically charging particles having the same chemical composition as the particles used to prep the surface. Finally, a charged-particle-entrained fluid stream is directed at high speed at the charged surface to coat the surface. The particles form both mechanical and electronic bonds with the surface.Type: GrantFiled: November 10, 2014Date of Patent: December 6, 2016Assignee: VLN Advanced Technologies Inc.Inventors: Mohan M. Vijay, Meisheng M. Xu, Emilio Panarella, Wenzhuo Yan, Andrew Hung Tieu, Bruce R. Daniels
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Publication number: 20160339460Abstract: A method of stripping, prepping and coating a surface comprises first stripping the exiting coating from a surface, using continuous or pulsed fluid jet, followed by prepping the surface by the same fluid jet. The method also provides entraining particles into a fluid stream, if desired to generate a particle-entrained fluid stream that is directed at the surface to be stripped and prepped. The particles act as abrasive particles for prepping the surface to a prescribed surface roughness required for subsequent application of a coating to the surface. The method then entails coating the surface by electrically charging particles having the same chemical composition as the particles used to prep the surface. Finally, a charged-particle-entrained fluid stream is directed at high speed at the charged surface to coat the surface. The particles form both mechanical and electronic bonds with the surface.Type: ApplicationFiled: June 24, 2016Publication date: November 24, 2016Inventors: Mohan M. Vijay, Meisheng M. Xu, Emilio Panarella, Wenzhuo Yan, Andrew Hung Tieu, Bruce R. Daniels
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Publication number: 20150315714Abstract: A method of stripping, prepping and coating a surface includes first stripping the exiting coating from a surface, using continuous or pulsed fluid jet, followed by prepping the surface by the same fluid jet. The method also provides entraining particles into a fluid stream, if desired to generate a particle-entrained fluid stream that is directed at the surface to be stripped and prepped. The particles act as abrasive particles for prepping the surface to a prescribed surface roughness required for subsequent application of a coating to the surface. The method then entails coating the surface by electrically charging particles having the same chemical composition as the particles used to prep the surface. Finally, a charged-particle-entrained fluid stream is directed at high speed at the charged surface to coat the surface. The particles form both mechanical and electronic bonds with the surface.Type: ApplicationFiled: November 10, 2014Publication date: November 5, 2015Inventors: Mohan M. Vijay, Meisheng M. Xu, Emilio Panarella, Wenzhuo Yan, Andrew Hung Tieu, Bruce R. Daniels
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Publication number: 20140252107Abstract: A method of prepping a cylindrical inner surface of a bore using a high-frequency forced pulsed waterjet apparatus entails generating a pressurized waterjet using a high-pressure water pump, generating a high-frequency signal using a high-frequency signal generator, applying the high-frequency signal to a transducer having a microtip to cause the microtip to vibrate to thereby generate the high-frequency forced pulsed waterjet, and rotating the rotatable ultrasonic nozzle inside the bore to prep the inner cylindrical surface of the bore using the high-frequency forced pulsed waterjets exiting from the angled exit orifices of the rotatable ultrasonic nozzle.Type: ApplicationFiled: May 22, 2014Publication date: September 11, 2014Applicant: VLN Advanced Technologies Inc.Inventors: Mohan M. Vijay, Andrew Hung Tieu, Wenzhuo Yan, Bruce R. Daniels
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Publication number: 20140008453Abstract: A method of prepping a cylindrical inner surface of a bore using a high-frequency forced pulsed waterjet apparatus entails generating a pressurized waterjet using a high-pressure water pump, generating a high-frequency signal using a high-frequency signal generator, applying the high-frequency signal to a transducer having a microtip to cause the microtip to vibrate to thereby generate the high-frequency forced pulsed waterjet, and rotating the rotatable ultrasonic nozzle inside the bore to prep the inner cylindrical surface of the bore using the high-frequency forced pulsed waterjets exiting from the angled exit orifices of the rotatable ultrasonic nozzle.Type: ApplicationFiled: September 5, 2013Publication date: January 9, 2014Applicant: VLN Advanced Technologies Inc.Inventors: Mohan M. Vijay, Andrew Hung Tieu, Wenzhuo Yan, Bruce R. Daniels
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Patent number: 8550873Abstract: A method of prepping a surface using a high-frequency forced pulsed waterjet entails generating a high-frequency signal having a frequency f using a high-frequency signal generator, applying the high-frequency signal to a transducer having a microtip to cause the microtip of the transducer to vibrate to thereby generate a forced pulsed waterjet through an exit orifice of a nozzle having an exit orifice diameter d and a length L. The forced pulsed waterjet prepares the surface to within a predetermined range of surface roughness. The surface roughness is determined by selecting operating parameters comprising a standoff distance (SD), a traverse velocity VTR of the nozzle, a water pressure P, a water flow rate Q, a length-to-diameter (L/d) ratio, a microtip-to-orifice distance (a), the frequency f, and an amplitude A of the high-frequency signal.Type: GrantFiled: July 16, 2009Date of Patent: October 8, 2013Assignee: VLN Advanced Technologies Inc.Inventors: Mohan M. Vijay, Andrew Hung Tieu, Wenzhuo Yan, Bruce R. Daniels
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Patent number: 8387894Abstract: An ultrasonic waterjet apparatus (10) has a mobile generator module (20) and a high-pressure water hose (40) for delivering high-pressure water from the mobile generator module (20) to a hand-held gun (50) with a trigger and an ultrasonic nozzle (60). An ultrasonic generator in the mobile generator module (20) transmits high-frequency electrical pulses to a piezoelectric or magnetostrictive transducer (62) which vibrates to modulate a high-pressure waterjet flowing through the nozzle (60). The waterjet exiting the ultrasonic nozzle (60) is pulsed into mini slugs of water, each of which imparts a waterhammer pressure on a target surface. The ultrasonic waterjet apparatus (10) may be used to cut and de-burr materials, to clean and de-coat surfaces, and to break rocks.Type: GrantFiled: December 29, 2010Date of Patent: March 5, 2013Assignee: Pratt & Whitney Military Aftermarket Services, Inc.Inventors: Mohan M. Vijay, Wenzhuo Yan, Andrew Tieu, Baolin Ren
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Patent number: 8360337Abstract: An ultrasonic waterjet apparatus has a mobile generator module and a high-pressure water hose for delivering high-pressure water from the mobile generator module to a hand-held gun with a trigger and an ultrasonic nozzle. An ultrasonic generator transmits high-frequency electrical pulses to a piezoelectric or magnetostrictive transducer which vibrates to modulate a high-pressure waterjet flowing through the nozzle. The waterjet exiting the ultrasonic nozzle is pulsed into mini slugs of water. The ultrasonic waterjet apparatus may be used to cut and de-burr materials, to clean and de-coat surfaces, and to break rocks. The ultrasonic waterjet apparatus performs these tasks with much greater efficiency than conventional continuous-flow waterjet systems because of the repetitive waterhammer effect. A nozzle with multiple exit orifices or a rotating nozzle may be provided in lieu of a nozzle with a single exit orifice to render cleaning and de-coating large surfaces more efficient.Type: GrantFiled: November 21, 2011Date of Patent: January 29, 2013Assignee: Pratt & Whitney Military Aftermarket Services, Inc.Inventors: Mohan M. Vijay, Wenzhuo Yan, Andrew Tieu, Baolin Ren
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Publication number: 20120061485Abstract: An ultrasonic waterjet apparatus has a mobile generator module and a high-pressure water hose for delivering high-pressure water from the mobile generator module to a hand-held gun with a trigger and an ultrasonic nozzle. An ultrasonic generator transmits high-frequency electrical pulses to a piezoelectric or magnetostrictive transducer which vibrates to modulate a high-pressure waterjet flowing through the nozzle. The waterjet exiting the ultrasonic nozzle is pulsed into mini slugs of water. The ultrasonic waterjet apparatus may be used to cut and de-burr materials, to clean and de-coat surfaces, and to break rocks. The ultrasonic waterjet apparatus performs these tasks with much greater efficiency than conventional continuous-flow waterjet systems because of the repetitive waterhammer effect. A nozzle with multiple exit orifices or a rotating nozzle may be provided in lieu of a nozzle with a single exit orifice to render cleaning and de-coating large surfaces more efficient.Type: ApplicationFiled: November 21, 2011Publication date: March 15, 2012Inventors: Mohan M. Vijay, Wenzhuo Yan, Andrew Tieu, Baolin Ren
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Patent number: 8006915Abstract: An ultrasonic waterjet apparatus (10) has a mobile generator module (20) and a high-pressure water hose (40) for delivering high-pressure water from the mobile generator module (20) to a hand-held gun (50) with a trigger and an ultrasonic nozzle (60). An ultrasonic generator in the mobile generator module (20) transmits high-frequency electrical pulses to a piezoelectric or magnetostrictive transducer (62) which vibrates to modulate a high-pressure waterjet flowing through the nozzle (60). The waterjet exiting the ultrasonic nozzle (60) is pulsed into mini slugs of water, each of which imparts a waterhammer pressure on a target surface. The ultrasonic waterjet apparatus (10) may be used to cut and de-burr materials, to clean and de-coat surfaces, and to break rocks.Type: GrantFiled: August 24, 2009Date of Patent: August 30, 2011Inventors: Mohan M. Vijay, Wenzhuo Yan, Andrew Tieu, Baolin Ren
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Publication number: 20110089251Abstract: An ultrasonic waterjet apparatus (10) has a mobile generator module (20) and a high-pressure water hose (40) for delivering high-pressure water from the mobile generator module (20) to a hand-held gun (50) with a trigger and an ultrasonic nozzle (60). An ultrasonic generator in the mobile generator module (20) transmits high-frequency electrical pulses to a piezoelectric or magnetostrictive transducer (62) which vibrates to modulate a high-pressure waterjet flowing through the nozzle (60). The waterjet exiting the ultrasonic nozzle (60) is pulsed into mini slugs of water, each of which imparts a waterhammer pressure on a target surface. The ultrasonic waterjet apparatus (10) may be used to cut and de-burr materials, to clean and de-coat surfaces, and to break rocks.Type: ApplicationFiled: December 29, 2010Publication date: April 21, 2011Applicant: VLN ADVANCED TECHNOLOGIES, INC.Inventors: Mohan M. Vijay, Wenzhuo Yan, Andrew Tieu, Baolin Ren
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Publication number: 20100015892Abstract: A method of prepping a surface using a high-frequency forced pulsed waterjet entails generating a high-frequency signal having a frequency f using a high-frequency signal generator, applying the high-frequency signal to a transducer having a microtip to cause the microtip of the transducer to vibrate to thereby generate a forced pulsed waterjet through an exit orifice of a nozzle having an exit orifice diameter d and a length L. The forced pulsed waterjet prepares the surface to within a predetermined range of surface roughness. The surface roughness is determined by selecting operating parameters comprising a standoff distance (SD), a traverse velocity VTR of the nozzle, a water pressure P, a water flow rate Q, a length-to-diameter (L/d) ratio, a microtip-to-orifice distance (a), the frequency f, and an amplitude A of the high-frequency signal.Type: ApplicationFiled: July 16, 2009Publication date: January 21, 2010Applicant: VLN Advanced Technologies Inc.Inventors: Mohan M. Vijay, Andrew Hung Tieu, Wenzhuo Yan, Bruce R. Daniels
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Publication number: 20090308948Abstract: An ultrasonic waterjet apparatus (10) has a mobile generator module (20) and a high-pressure water hose (40) for delivering high-pressure water from the mobile generator module (20) to a hand-held gun (50) with a trigger and an ultrasonic nozzle (60). An ultrasonic generator in the mobile generator module (20) transmits high-frequency electrical pulses to a piezoelectric or magnetostrictive transducer (62) which vibrates to modulate a high-pressure waterjet flowing through the nozzle (60). The waterjet exiting the ultrasonic nozzle (60) is pulsed into mini slugs of water, each of which imparts a waterhammer pressure on a target surface. The ultrasonic waterjet apparatus (10) may be used to cut and de-burr materials, to clean and de-coat surfaces, and to break rocks.Type: ApplicationFiled: August 24, 2009Publication date: December 17, 2009Applicant: VLN ADVANCED TECHNOLOGIES, INC.Inventors: Mohan M. Vijay, Wenzhuo Yan, Andrew Tieu, Baolin Ren
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Patent number: 7594614Abstract: An ultrasonic waterjet apparatus (10) has a mobile generator module (20) and a high-pressure water hose (40) for delivering high-pressure water from the mobile generator module (20) to a hand-held gun (50) with a trigger and an ultrasonic nozzle (60). An ultrasonic generator in the mobile generator module (20) transmits high-frequency electrical pulses to a piezoelectric or magnetostrictive transducer (62) which vibrates to modulate a high-pressure waterjet flowing through the nozzle (60). The waterjet exiting the ultrasonic nozzle (60) is pulsed into mini slugs of water, each of which imparts a waterhammer pressure on a target surface. The ultrasonic waterjet apparatus (10) may be used to cut and de-burr materials, to clean and de-coat surfaces, and to break rocks. The ultrasonic waterjet apparatus (10) performs these tasks with much greater efficiency than conventional continuous-flow waterjet systems because of the repetitive waterhammer effect.Type: GrantFiled: November 3, 2003Date of Patent: September 29, 2009Assignee: VLN Advanced Technologies, Inc.Inventors: Mohan M. Vijay, Wenzhuo Yan, Andrew Tieu, Baolin Ren
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Publication number: 20070063066Abstract: An ultrasonic waterjet apparatus (10) has a mobile generator module (20) and a high-pressure water hose (40) for delivering high-pressure water from the mobile generator module (20) to a hand-held gun (50) with a trigger and an ultrasonic nozzle (60). An ultrasonic generator in the mobile generator module (20) transmits high-frequency electrical pulses to a piezoelectric or magnetostrictive transducer (62) which vibrates to modulate a high-pressure waterjet flowing through the nozzle (60). The waterjet exiting the ultrasonic nozzle (60) is pulsed into mini slugs of water, each of which imparts a waterhammer pressure on a target surface. The ultrasonic waterjet apparatus (10) may be used to cut and de-burr materials, to clean and de-coat surfaces, and to break rocks.Type: ApplicationFiled: November 3, 2003Publication date: March 22, 2007Applicant: Nortel Networks LimitedInventors: Mohan Vijay, Wenzhuo Yan, Andrew Tieu, Baolin Ren