DAN NGUYEN, NP
Nursing at Walker St, Cypress, CA

2011022, Sep 22, 2011

Mar 18, 2011

13/052013

Dan T. Nguyen - Irvine CA, US
Bruce W. Behar - Pasadena CA, US
Ted A. Mckay - Foothill Ranch CA, US

F16H 25/24, F16H 25/20

74 8938, 74 8939

Vehicles commonly include control-surfaces and other components that are selectively moved during operation among a plurality of positions. Movement of aircraft control-surface components is crucial in flight, and an actuating assembly must consistently and dependably perform during normal operation and be prepared to survive situations outside normal operation and/or to compensate for circumstances causing loss of actuator control. Jam tolerant electromechanically operated actuation systems, of both the rotary and linear types, together with their methods of operation are described herein. Specifically, electrical jam-detection and control systems and associated locking and damping devices can be electrically and mechanically engaged and disengaged, are automatically reversible, and are testable.

7275474, Oct 2, 2007

May 25, 2006

11/440636

Bruce D. Larkin - Plainwell MI, US
Joseph A. Kovach - Aurora OH, US
Matthew H. Simon - Kalamazoo MI, US
Eric B. Chapman - Brea CA, US
Dan T. Nguyen - Irvine CA, US

Parker-HannifinCorporation - Cleveland OH

F01B 31/12, F01B 3/00

92 5R, 92 122, 91 1

In a variable displacement type hydraulic pump/motor assembly including at least one internally movable component, such as a yoke, a swashplate, and the means for moving the swashplate, the improvement includes imparting on this component absolute location indicia markings and the addition of an optical/electronic sensor unit capable of reading such indicia markings fixedly located on a housing of the pump/motor assembly and including an optical read head extending into the housing interior and located at a spaced distance from the indicia markings for reading same, relative to a reference location, and producing a signal indicative of the absolute position of the movable component. The signal can then, in turn, be used for controlling the displacement of the pump/motor assembly. A method for determining the absolute component position is also set forth.

8230750, Jul 31, 2012

Feb 26, 2009

12/393304

James E. Flatt - Foothill Ranch CA, US
David J. Gurrola - Fillmore CA, US
Bruce W. Behar - Pasadena CA, US
Dan T. Nguyen - Irvine CA, US

Parker-Hannifin Corporation - Cleveland OH

F16H 29/20

74 8938, 74 8939, 74 8928, 74 8929, 244 992

An electromechanical actuating assembly can have a redundant design with a first electric motor providing actuator-moving power via a first drive train and a second electric motor providing actuator-moving power via a second drive train. A first decoupling train can transmit decoupling power to decouple the first drive train from the actuator and a second decoupling train for transmit decoupling power to decouple the second drive train from the actuator. The assembly is operable in a fault-tolerant mode wherein actuator-moving power is transferred only through one drive train and the other drive train is decoupled from the actuator.

7394244, Jul 1, 2008

Oct 22, 2004

10/971569

William R. Schley - Rancho Santa Margarita CA, US
Eric B. Chapman - Brea CA, US
Dan Thanh Nguyen - Irvine CA, US
Lawrence P. Flesch - Westminster CA, US
Sandra Lynn Harper - Dana Point CA, US
Curtis Edgar Stevens - Irvine CA, US

Parker-Hannifan Corporation - Cleveland OH

G01B 7/14, G01R 33/069, H01L 43/06

32420724, 3242072

A system and method for measuring the position of at least one field producing element (e. g. , a magnet) without a direct electrical or physical connection between the field producing element and one or more sensors. In one embodiment, the output from an array of sensors (e. g. , Hall Effect sensors) is curve fit using an algorithm having a characteristic bell curve (e. g. , curve fit tracking algorithm, center of gravity algorithm, etc. ) to determine at least one of an absolute or relative position associated with the field producing element and/or a property associated with the field producing element (e. g. , magnetic flux). Another embodiment is directed to detecting errors in one or more of the sensors and excluding the output of the faulty sensors in determining the position associated with the field producing element.

8136418, Mar 20, 2012

Aug 3, 2009

12/534168

Bruce W. Behar - Pasadena CA, US
James E. Flatt - Portage MI, US
David J. Gurrola - Fillmore CA, US
Dan T. Nguyen - Irvine CA, US

Parker-Hannifin Corporation - Cleveland OH

F16H 3/06, B64C 17/00

74 8923, 244 992

An electromechanical actuating assembly (), operable in a plurality of fault-tolerant modes to accommodate at least the most probable fault situations. In the M1D1-only mode, actuator-moving power is transferred only through the first drivetrain (A) and decoupling power transmitted through the second decoupling train (B) decouples the second drivetrain (B) from the actuator (). In the M2D2-only mode, actuator-moving power is transferred only through the second drivetrain (B) and decoupling power transmitted through the first decoupling train (A) decouples the first drivetrain (A) from the actuator ().