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Now showing items 113 - 128 of 1756

  • Method for improvement of involute and lead error in powder metal gears

    Gears, particularly spur gears, are produced by powder metal techniques with minimal lead line error and eccentricity, which gears are preformed from powder metal, sintered, hardened and thereafter have their involute surfaces regenerated by a hard hob with a negative rake on the hob teeth to provide gears having aligned involute surfaces between adjacent gear teeth and, between each gear tooth and the gear center line.
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  • Electrically isolated power switching device mounting assembly for EMI reduction

    A power electronics chassis (10) and liquid-cooled heat sink mounting assembly for electric vehicles and other applications that use liquid coolant to cool power electronic devices (20) contained within an electrically conductive housing (12). The power electronics chassis (10) includes an inverter (18) containing power switching devices (20) that are heat sunk using the liquid-cooled mounting assembly. The mounting assembly includes a heat exchanger (22) and a plastic, electrically non-conductive coolant manifold (16) that has an inlet (26) and outlet (28) for passage of liquid coolant into and out of the electronics housing (12). The power switching devices (20) are attached to a mounting surface (40) of the heat exchanger (22) and are thermally coupled to the coolant within the heat exchanger (22) via the mounting surface (40). The inlet (26) and outlet (28) of the plastic coolant manifold (16) are connected to the heat exchanger (22) by conduits (30,32) to thereby permit circulation of liquid coolant into the chassis housing (12), through the heat exchanger (22), and back out of the chassis housing (12) while maintaining electrical isolation between the liquid coolant and chassis housing (12). This configuration significantly reduces the radiated EMI by significantly reducing the parasitic capacitance between the switching devices (20) and chassis housing (12).
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  • Method for repairing tissue defects using ultrasonic radio frequency energy

    A method of repairing a defect in tissue includes the steps of placing a prosthetic over a tissue defect and against surrounding tissue. The prosthetic is then embedded into the surrounding tissue by an application of pressure and ultrasonic energy to the prosthetic and the surrounding tissue on at least one location on the prosthetic and surrounding tissue. The embedded prosthetic is then welded into surrounding tissue by an application of pressure and Radio Frequency energy on the same location.
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  • RF bipolar mesentery takedown device including improved bipolar end effector

    The present invention is directed to a bipolar electrosurgical instrument suitable for use in mesentery tissue and other suitable tissue structures, including vessels. A bipolar electrosurgical instrument according to the present invention includes an end effector which includes a tissue slot and electrodes arranged on either side of the tissue slot. The opposing electrodes are electrically connected such that tissue passing through the slot is electrically treated with electrosurgical current passing laterally through the tissue. An end effector according to the present invention further includes a tissue separator arranged at the end of the slot to divide tissue as it is passed through the slot and after it is treated.
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  • Fluid-assisted medical devices, systems and methods

    Surgical devices for treating tissue are provided. Also provided are systems for treating tissue and methods of treating tissue. An exemplary surgical device has a handle, a fluid passage connectable to a fluid source, a tip portion and a distal end. The tip portion can simultaneously provide RF power and conductive fluid to tissue. The tip portion includes an electrode having a domed portion having a domed surface and a cylindrical portion having a cylindrical surface. The domed portion is located distal to the cylindrical portion and occupies at least a portion of the distal end of the surgical device. The device includes a fluid outlet opening in fluid communication with the fluid passage, the fluid outlet opening configured to provide the conductive fluid to a surface of the electrode proximal to the distal end surface of the surgical device.
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  • Method and apparatus for tracking mobile transactions

    A method to submit transaction data using a mobile device involves obtaining a receipt associated with a financial transaction, transmitting a message, based on the receipt, from the mobile device to a transaction management service, wherein the message comprises a mobile device identifier and transaction data associated with the financial transaction, wherein transaction data associated with financial transaction is stored in a repository based on the mobile device identifier, receiving a form, wherein the form is generated based on transaction data associated with the mobile device identifier, and transmitting and synchronizing transaction data from the repository to a financial management software associated with a user of the mobile device.
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  • Method for repairing tissue defects using an ultrasonic device

    A method of repairing a defect in tissue includes the steps of placing a prosthetic over a tissue defect and against surrounding tissue. The prosthetic is then embedded into the surrounding tissue by an application of pressure and ultrasonic energy to the prosthetic and the surrounding tissue on at least one location on the prosthetic and surrounding tissue. The embedded prosthetic is then welded into surrounding tissue by an application of pressure and ultrasonic energy on the same location. The second application of energy is at a different energy intensity than the first application of energy.
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  • RF bipolar end effector for use in electrosurgical instruments

    The present invention is directed to a bipolar electrosurgical end effector for use in medical instruments. A bipolar end effector according to the present invention includes a tissue slot and electrodes arranged on either side of the tissue slot. The opposing electrodes are electrically connected such that tissue passing through the slot is electrically treated with electrosurgical current passing laterally through the tissue. An end effector according to the present invention further includes a tissue separator arranged at the end of the slot to divide tissue as it is passed through the slot and after it is treated.
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  • Pin fin heat sink and pin fin arrangement therein

    A pin fin heat sink having mixed geometry pin fin configurations is presented. The mixed geometry pin fin configuration are designed to optimize the positive attributes of each individual pin fin geometry to provide a low cost overall system and provide better system performance in high flow rate systems. In an exemplary embodiment, the pin fin heat sink comprises a base surface having a plurality of pin fins perpendicular to and protruding therefrom. The plurality of pin fins actually comprises a plurality of pin fins having a first configuration and a plurality of pin fins having a second configuration. The second configuration pin fins are intended to streamline any turbulence created by the first configuration pin fins which are located upstream of the second configuration pin fins. Preferably, the first configuration comprises substantially circular shaped pin fins and the second configuration comprises substantially elliptical shaped pin fins.
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  • Support apparatus with a plurality of thermal zones providing localized cooling

    An apparatus for supporting a human or animal body, while selectively cooling weight-bearing areas of the body in order to prevent or reduce damage from ischemia includes a cooling layer that is partitioned into a plurality of zones, and a surface disposed over the cooling layer to support the body. Each zone of the cooling layer is disposed for cooling a respective portion of the surface. Means are provided to selectively operate one or more zones of the plurality of the zones to cool a portion of the surface that receives pressure from a weight-bearing surface of the body being supported.
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  • System for convective warming of a patient during cardiac surgery

    A warming system is provided for convectively warming a patient during a progressive medical procedure, such as cardiac surgery. The system includes one or more inflatable thermal blankets that are adjustably configurable to cover one or both of a patient's legs. Each thermal blanket includes an inflatable covering formed from an upper sheet and a base sheet attached at a plurality of locations. The base sheet includes a plurality of apertures that direct an inflating medium from the inflatable covering toward the patient. A portion of each thermal blanket is initially furled using a retaining device that prevents an inflating medium from inflating the furled portion. The non-furled portion of each thermal blanket is allowed to inflate and cover a patient. Prior to inflation, the furled portion of each thermal blanket defines a thermal blanket edge with demarcates an access area for a surgical procedure. When the retaining strip is removed, the furled portion is unfurled by action of the inflating medium and self erects into a continuation of the previously inflated nonfurled portion of the thermal blanket to cover the surgical access site. A surgical drape may be placed over the tops of the thermal blankets in order to properly position each blanket on the patient, to maintain the temperature controlled medium proximate to the patient, and to perform the usual barrier functions of a drape. In the operation, a heater/blower that includes a compressor and a heater supplies heated air, under pressure, to an inlet opening in the one or more inflatable thermal blankets. The heated, pressurized air is distributed throughout each inflatable blanket, and flows to the patient through the apertures in the blanket's base sheet.
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  • Flat resistors for automotive blower motor speed control or other service

    The flat resistor comprises a stack of flat components including a first metal plate having assembly tabs bent, a first outer electrical insulator having alignment slots for receiving the tabs, a first sheet metal resistance element having slots for receiving the tabs with a clearance fit, a first inner electrical insulator having alignment slots for receiving the tabs, a metal midplate having oversize slots for receiving the tabs with a clearance fit, a second thin inner insulator having alignment slots for receiving the tabs, a second sheet metal resistance element having clearance slots for receiving the tabs, a second thin outer insulator having alignment slots for receiving the tabs, and a second metal outer plate having alignment slots for receiving the tabs, which are bent into engagement with the second plate for compressing the stack. The resistance elements have alignment tabs extending through alignment slots in the corresponding outer insulators and securely bent behind the insulators. The outer plates have clearance voids formed by outward embossments opposite the bent tabs. A thermal fuse is pressed by a wire spring against a V-shaped seat comprising lugs bent from the midplate at oppositely slanting angles. The wire spring is connected between the fuse and the lugs.
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  • Inflatable thermal blanket for convectively and evaporatively cooling a body

    An inflatable thermal blanket is disclosed for convectively and evaporatively cooling a patient. The inflatable thermal blanket comprises an upper sheet and a base sheet that are attached at a plurality of locations to form an inflatable covering. The base sheet includes a plurality of apertures that direct an inflating medium from the inflatable covering toward the patient. The base sheet also supports a fluid delivery apparatus that distributes and delivers a cooling fluid to the patient. The fluid is evaporated from the patient's skin by the inflating medium exhausted from the inflatable covering. The fluid delivery apparatus may be constructed in a variety of configurations and may be circulate a variety of fluids, which may be pressurized or unpressurized. In operation, an air blower, that may also include a compressor for selectively delivering room temperature or cooled air to the inflatable thermal blanket, is connected to the inflatable covering. The blower delivers air, under pressure, to an inlet opening in the inflatable covering. The pressurized air is distributed throughout the inflatable covering and flows to the patient through the apertures in the base sheet. The inflatable thermal blanket is configured to cover one or more portions of a patient's body. In one construction, the inflatable thermal blanket covers all of the patient's body except for the head. In an alternative construction, a specially designed inflatable thermal blanket is constructed to cover only the patient's head.
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  • Learning from a Disaster: Improving Nuclear Safety and Security after Fukushima ed. by Edward D. Blandford, Scott D. Sagan

    Okamoto, Takuji  

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  • System and method of providing communication service using a private packet network backbone exchange

    Systems and methods for providing communication service using a private packet network backbone exchange (PPNBE) are disclosed. The private packet network backbone exchange may include a logical call control entity, a logical routing database, one or more PPNBE gateways, and a private packet network. The PPNBE may provide “one-hop” call connection between a call-originating entity and a call-terminating entity without traversal of any other exchanges. The PPNBE may simultaneously support both one-hop local and long distance calls. The PPNBE architecture is easily scalable and incorporated into existing communication networks for on-net and off-net service. Methods and systems for providing access tandem communication service using a PPNBE are also disclosed.
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  • Method for forming a lithographic mask used for patterning semiconductor die

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