Ridha
Ridha Benmrad, Toronto CA
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20100237737 | OPTIMIZED BI-DIRECTIONAL ELECTROSTATIC ACTUATORS - An electrostatic actuator comprising: first and second comb arrays of electrodes arranged on a base, the electrodes of the first and second comb arrays being interleaved; a third comb array of electrodes spring mounted over the first and second comb arrays, the electrodes of the third comb array being aligned with the electrodes of the second comb array; and, means for applying a first voltage to the third comb array and a second voltage to the first and second comb arrays to generate an attractive force acting on the third comb array to move the third comb array toward the second comb array; wherein: the electrodes of the third comb array each have a thickness tj and a width a such that a≧tf, the electrodes of the second comb array each have a width b such that a≦b≦10a; the electrodes of the first and second comb arrays are separated by a distance d such that 0.5Z>09-23-2010 | |
20110080627 | Translating and Rotation Micro Mechanism - A translation and rotation mechanism is disclosed, which comprises of one or more bi-directional electrostatic actuators. Each bi-directional electrostatic actuator comprising of fixed electrodes and movable electrodes, where the fixed electrodes of each actuator being attached onto a base. The movable electrodes of each actuator are connected to the translating and rotation unit through a spring system. The movable elements of each said actuator being able to rotate with respect to the base plane by applying voltage signals to the actuator and by controlling the voltage signals applied to each said actuator independently, said translating and rotation unit being able to translate, rotate, or translate and rotate simultaneously. | 04-07-2011 |
Ridha Ben Mrad, Richmond Hill CA
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20090045333 | Electrospray emitter and method of using same - The present invention relates to electrospray emitters that have a rigid substrate layer, a second layer, a channel formed in one of the rigid substrate layer and an exit orifice in flow communication with the channel. The second layer is attached to the first layer. The exit orifice is capable of holding an electric charge. The electrospray emitter may be used with such devices as a mass spectrometer, a colloidal thruster or an ion mobility device. Additionally, it may be used to coat a surface. | 02-19-2009 |
Ridha Berriche, Dallas, TX US
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20120085326 | METHOD AND APPARATUS FOR CONVERTING DIESEL ENGINES TO BLENDED GASEOUS AND DIESEL FUEL ENGINES - The invention presents a method of converting a diesel fueled engine to a blended-fuel engine capable of operating on blended gaseous fuel and diesel fuel, where the diesel fueled engine has a plurality of cylinders, a plurality of diesel fuel injectors for injecting diesel fuel into the cylinders, and an Engine Control Unit (ECU) for controlling at least the operation of the diesel injectors by sending diesel fuel injector control signals to the diesel fuel injectors. | 04-12-2012 |
Ridha Bhiri, Grenoble FR
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20130249284 | CONDUIT FOR RECEIVING ELONGATE ELEMENTS, METHOD FOR MOUNTING SAME, AND ASSEMBLY COMPRISING A MOUNTING AND SUCH A CONDUIT - A conduit is mountable to a mounting, such as the engine block of an automobile, and includes a body defining an area for receiving elongate elements, such as cables. A first locking member is stationary relative to the body, and a second locking member is mobile relative to the body. The movable locking member is capable of assuming an intermediate position, in which it defines, together with the body, a preliminary support space for the mounting, The conduit includes a locking feature capable of moving the movable locking member from the intermediate position to a locking position. | 09-26-2013 |
Ridha Chafai, Gloucestershire GB
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20100089659 | Drilling Tool - A bi-center drilling tool comprises a main reamer region located eccentrically to an axis of rotation of the tool, and a leading cutting structure located ahead of the main reamer region, in the drilling direction, the leading cutting structure being located so as to apply a side loading to the drilling tool, the direction in which the side loading acts being such as to counter a side loading applied, in use, due to the main reamer region being eccentric to the axis of rotation. | 04-15-2010 |
20100108396 | Drilling Tool - A drilling tool has a body with a main drilling region and a pilot drilling region, eccentric to the main drilling region. The main drilling region has main blades and the pilot drilling region has pilot blades. The main drilling region has a main pass-through diameter, centered upon a first axis, one of the main blades extending to the main pass-through diameter, the pilot region having a pilot gauge diameter, centred upon a second axis of rotation at least one of the pilot blades extending to the pilot gauge diameter, wherein part of a circle of diameter equal to the pilot gauge diameter and centred upon the second axis of rotation extends outside of a circle of diameter equal to the main pass-through diameter and centred upon the first axis. | 05-06-2010 |
Ridha Chaggara, Toulouse FR
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20100169005 | METHOD AND DEVICE FOR DETERMINING A CONSOLIDATED POSITION OF A TRAVELING OBJECT, PARTICULARLY AN AIRCRAFT - The invention relates to a method and device for determining a consolidated position of a travelling object, particularly an aircraft. The device ( | 07-01-2010 |
Ridha Hamila, Doha QA
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20130251057 | SYSTEM AND METHODS FOR COMPENSATION OF I/Q IMBALANCE IN BEAMFORMING OFDM SYSTEMS - Disclosed are an system and method for compensation of I/Q imbalance in a beamforming OFDM system. The system comprises: a TX beamformer configured at a transmitter end of the beamforming OFDM system; a noise whitener configured at a receiver end of the beamforming OFDM system; and a RX MMSE configured at the receiver end of the beamforming OFDM system. At least one of the TX beamformer, the noise whitener and the RX MMSE receiver, or any combination thereof are capable of jointly processing a carrier and its image subcarrier to compensate the I/Q imbalance in the beamforming system. | 09-26-2013 |