Patents by Inventor Logan H. Do
Logan H. Do 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: 10060285Abstract: A method of controlling a variable vane assembly includes the steps of sensing a first angular deflection of a first array of variable vanes about a first vane axis, and a second angular deflection of a second array of variable vanes about a second vane axis, the first array of variable vanes axially spaced from the second array of variable vanes, and adjusting the angular deflection of one of the first and second arrays of variable vanes, based on the sensed angular deflections from the other of the first and second arrays of variable vanes. A compressor including the variable vane assembly and a method of operating the variable vane assembly for a compressor are also disclosed.Type: GrantFiled: February 21, 2014Date of Patent: August 28, 2018Assignee: United Technologies CorporationInventors: Logan H. Do, Richard L. Sykes
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Patent number: 9835053Abstract: A bushing includes a cylindrical bushing body with a lubricant aperture and a dry lubrication source. The bushing defines a main bushing bore therethrough along a longitudinal axis. The lubricant aperture is defined in the bushing body along an angle relative to the longitudinal axis. The dry lubrication source is disposed in the lubricant aperture. A variable vane system includes a cylindrical case, a plurality of vanes projecting radially inward from the case, and a plurality of bushings. Each vane includes a respective vane stem operatively connecting an end of each vane to the case. Each bushing is disposed on one of the respective vane stems between the vane stem and the case. The respective vane stem is disposed within the main bushing bore and each bushing is slidingly engaged with the case.Type: GrantFiled: February 16, 2015Date of Patent: December 5, 2017Assignee: UNITED TECHNOLOGIES CORPORATIONInventor: Logan H. Do
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Publication number: 20160356178Abstract: A bushing includes a cylindrical bushing body with a lubricant aperture and a dry lubrication source. The bushing defines a main bushing bore therethrough along a longitudinal axis. The lubricant aperture is defined in the bushing body along an angle relative to the longitudinal axis. The dry lubrication source is disposed in the lubricant aperture. A variable vane system includes a cylindrical case, a plurality of vanes projecting radially inward from the case, and a plurality of bushings. Each vane includes a respective vane stem operatively connecting an end of each vane to the case. Each bushing is disposed on one of the respective vane stems between the vane stem and the case. The respective vane stem is disposed within the main bushing bore and each bushing is slidingly engaged with the case.Type: ApplicationFiled: February 16, 2015Publication date: December 8, 2016Inventor: Logan H. Do
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Patent number: 9422825Abstract: A synchronization ring for a gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, a synchronization ring for a variable vane assembly. A plurality of rollers are attached to the synchronization ring for engaging a case on the gas turbine engine.Type: GrantFiled: November 5, 2012Date of Patent: August 23, 2016Assignee: UNITED TECHNOLOGIES CORPORATIONInventor: Logan H. Do
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Patent number: 9404384Abstract: An assembly includes a synchronizing ring, a vane arm, and a multi-axis joint. The multi-axis joint connects the synchronizing ring to the vane arm and provides the vane arm with movement about a first pivot axis and a second pivot axis.Type: GrantFiled: September 12, 2012Date of Patent: August 2, 2016Assignee: United Technologies CorporationInventor: Logan H. Do
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Publication number: 20160040550Abstract: A method of controlling a variable vane assembly includes the steps of sensing a first angular deflection of a first array of variable vanes about a first vane axis, and a second angular deflection of a second array of variable vanes about a second vane axis, the first array of variable vanes axially spaced from the second array of variable vanes, and adjusting the angular deflection of one of the first and second arrays of variable vanes, based on the sensed angular deflections from the other of the first and second arrays of variable vanes. A compressor including the variable vane assembly and a method of operating the variable vane assembly for a compressor are also disclosed.Type: ApplicationFiled: February 21, 2014Publication date: February 11, 2016Inventors: Logan H. Do, Richard L. Sykes
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Publication number: 20160024959Abstract: An example section of a gas turbine engine includes a plurality of variable vanes circumferentially disposed about an engine axis, a first moveable annular ring disposed on an upstream side of the variable vanes, a second movable annular ring disposed on a downstream side of the variable vanes, and a plurality of vane arms, each including a first end secured to the first annular ring and a second end secured to the second annular ring. Movement of the first and second annular rings moves the vane arms, thereby actuating the plurality of variable vanes. An example variable vane assembly includes a vane arm including a portion that engages a variable vane, a first end configured to be secured to a first movable annular ring, and a second end configured to be secured to a second movable annular ring. Movement of the first and second annular rings moves the vane arms, thereby actuating the plurality of variable vanes.Type: ApplicationFiled: February 18, 2014Publication date: January 28, 2016Inventors: Logan H. Do, Richard L. Sykes
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Publication number: 20140072413Abstract: An assembly includes a synchronizing ring, a vane arm, and a multi-axis joint. The multi-axis joint connects the synchronizing ring to the vane arm and provides the vane arm with movement about a first pivot axis and a second pivot axis.Type: ApplicationFiled: September 12, 2012Publication date: March 13, 2014Applicant: UNITED TECHNOLOGIES CORPORATIONInventor: Logan H. Do
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Patent number: 8549834Abstract: A nacelle assembly for a bypass gas turbine engine includes a variable area fan nozzle having a first fan nacelle section and a second fan nacelle section. The variable area fan nozzle is in communication with a fan bypass flow path, the first fan nacelle section defines an intermittent trailing edge which defines a multiple of ports and the second fan nacelle section defines a multiple of doors, each of the multiple of doors match each of the multiple of ports such that a fan nacelle trailing edge is continuous when the second fan nacelle section is selectively translated to a closed position relative to the first fan nacelle section.Type: GrantFiled: October 21, 2010Date of Patent: October 8, 2013Assignee: United Technologies CorporationInventors: Logan H. Do, Edward A. Krystowski
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Publication number: 20130009004Abstract: A thrust reverser for a gas turbine engine includes a hinge, a propulsion system duct, and a kicker blocker. Bypass air and gas path air travel through the propulsion system duct and the propulsion system duct has an intake inlet and an exhaust outlet. The kicker blocker has a kicker portion and a blocker portion. The kicker blocker is rotatably attached to the hinge and is movable between a stowed position and a deployed position. The blocker portion extends into the propulsion system duct when the kicker blocker is in the deployed position to block bypass air and gas path air traveling through the propulsion system duct in a first direction prior to the exhaust outlet, thereby redirecting the bypass air and the gas path air in a second direction.Type: ApplicationFiled: July 8, 2011Publication date: January 10, 2013Applicant: UNITED TECHNOLOGIES CORPORATIONInventor: Logan H. Do
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Patent number: 8196934Abstract: A slider seal assembly for a gas turbine engine includes a housing, a seal plate moveable relative to the housing and a retaining ring. The housing includes an outer surface, an inner surface, and a recessed opening between the outer surface and the inner surface. The seal plate is received within the recessed opening. The inner surface of the housing includes a curved portion which is curved in an outward direction toward the outer surface.Type: GrantFiled: January 10, 2007Date of Patent: June 12, 2012Assignee: United Technologies CorporationInventor: Logan H. Do
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Publication number: 20120096831Abstract: A nacelle assembly for a bypass gas turbine engine includes a variable area fan nozzle having a first fan nacelle section and a second fan nacelle section. The variable area fan nozzle is in communication with a fan bypass flow path, the first fan nacelle section defines an intermittent trailing edge which defines a multiple of ports and the second fan nacelle section defines a multiple of doors, each of the multiple of doors match each of the multiple of ports such that a fan nacelle trailing edge is continuous when the second fan nacelle section is selectively translated to a closed position relative to the first fan nacelle section.Type: ApplicationFiled: October 21, 2010Publication date: April 26, 2012Inventors: Logan H. Do, Edward A. Krystowski
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Publication number: 20100282832Abstract: A rural mailbox used for temporarily mails storage having a flexible support system or a flexi-modular that absorbs and reduces lateral impact through its spring system/mechanism by allowing the support arm to deflect and soften the magnitude of shock impact. The flexible support system or flexi-modular is a horizontal member of the mailbox post and can be utilized or mounted on any traditional mailbox vertical member or post that made of woods or hard plastics. The flexible support system or flexi-modular includes a base, a leaf spring, a horizontal support member and a pivot bolt assembly. The base is a main interface to the vertical post, as well as other sub-components of the flexi-modular. It is integrated with two extended lugs that hold the horizontal member through the pivot bolt and allow it to swing in plane to the left or right of the mailbox.Type: ApplicationFiled: May 5, 2009Publication date: November 11, 2010Inventor: Logan H. Do
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Publication number: 20080164658Abstract: A slider seal assembly for a gas turbine engine includes a housing, a seal plate moveable relative to the housing and a retaining ring. The housing includes an outer surface, an inner surface, and a recessed opening between the outer surface and the inner surface. The seal plate is received within the recessed opening. The inner surface of the housing includes a curved portion which is curved in an outward direction toward the outer surface.Type: ApplicationFiled: January 10, 2007Publication date: July 10, 2008Inventor: Logan H. Do