Tech Exchange

Cooler, Quieter Jet Engine for Light-Sport Aircraft and Ultralights

A small jet engine is suitable for light-sport, ultralight, and experimental aircraft, and can replace the vibrating piston engine and propeller combination used in most sport aircraft. Exhaust heat is minimized for safety to 750 °C, so that a suitably insulated cowling can be touched. By minimizing the heat, sound absorbers can be used so that sound output of the engine is also minimized to about 200 dB or less at a measured distance from the exhaust. The engine provides much less vibration than does a conventional propeller and piston engine combination. The engine provides about 500 N (almost 370 foot-pounds) of thrust using a small compressor diameter and a high rotation speed. This engine produces inherently less noise, and in addition uses sound attenuation such as glass fibers and other materials formed as part of the exhaust tube, boundary layers, and other techniques. Using such sound attenuation, as well as bypass air, also serves to insulate the heat-producing portions of the engine from pilot, passengers, and ground personnel. Get the complete report on this technology at: www.techbriefs.com/tow/200907b.html Email: nasatech@yet2.com Phone: 781-972-0600

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Low-Cost Engineered Properties for Non- Wovens, Films, and Laminates

A suite of nonwoven technologies offers low-cost mechanical processes that impart specific engineered properties to commodity-priced nonwovens, films, and laminates, and even to non-polymeric materials. A wide range of textures, controllable permeability, aperturing, multilayer composites, elasticity without elastic chemistry, and other features comprises various aspects of the suite. Many of the technologies operate at room temperature, without adhesives, and are suitable to high-speed lines (in excess of 500 FPM). They are compatible with production lines that may need to start and stop. They enhance the performance of low-cost materials — adding strength, puncture resistance, stretch, texture, permeability, and more — in ways that melt-based systems can achieve. They open potential new markets such as a new category of disposable fabric home goods (sheets, curtains, and pillows), new packaging options, and agricultural products. Get the complete report on this technology at: www.techbriefs.com/tow/200907a.html Email: nasatech@yet2.com Phone: 781-972-0600

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Shape-Memory Alloys Replace Traditional Electromagnet Actuators

Shape Memory Alloys (SMAs) are metals that “remember” their original shapes. SMA technology can provide the same mechanical movement and required forces of an electromagnetic actuator, but in a more compact form, while removing the need for motors, gearing, or springs. This SMA technology has shown a reduction in weight of up to 50%, a reduction in the space required of up 70%, and a cost reduction of up to 30% compared to traditional electromagnetic actuators. The technology can deliver mechanical movement as well as electrical connectivity, it is intrinsically safe, can be made into a flat but flexible actuator, and can operate around curvatures. Examples of applications are compact and low-weight linear electromechanical actuators; active Bowden cable devices; and temperature-dependent shape-changing actuation, displacement, or reversible surface modification. The technology could be used by the white goods, automation, medical devices, transportation, consumer goods, and leisure goods industries. Get the complete report on this technology at: www.techbriefs.com/tow/200906b.html Email: nasatech@yet2.com Phone: 781-972-0600

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Mechanical Mounting/Connection/Release System

The internal mechanism of the connector part of this system works to maintain positioning repeatability and rigidity, and compensates for wear over time, while both the connector and receiver are tapered in two planes to assure repeatable positioning. Together, the two form a rigid connection that can be unlocked and removed in a single plane, with no access to the side faces required for release. The principles of engaging, securing, and releasing the connector of this mount from the receiver remain the same at any scale — from applications in heavy equipment attachments, to medical devices and prostheses, to the scale of nano-machines. Applications include situations where one piece of equipment must be attached rigidly to another in a single direction; for example, attaching down-hole tools for drilling or laparoscopic operating tools where attachment and release can take place in one plane only, with no access to releases on the side. Areas of application include securing shipping containers and in microgravity where applications of side force cause unwanted rotational reaction. Get the complete report on this technology at: www.techbriefs.com/tow/200906a.html Email: nasatech@yet2.com Phone: 781-972-0600

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Modular Electronic Air Sterilization Technology for Airborne Bacteria, Molds, and Viruses

This technology sterilizes air, eliminating odors, preventing infections, and extending the shelf life of food. The scalable system results in 100% removal of microorganisms with one passthrough of air. The technology has optimized UV exposure with a specialized lamp construction and array formation. The system can be modularized according to the required volume flows, and can react to changes via its proprietary microchip technology. It can be used in conjunction with HEPA filters to remove all unwanted bodies within an air stream. The underlying technology deals with the variation in atmospheric conditions. The system is made up of a series of highly developed tubular modules that include a unique internal intelligent microchip that understands changes in the humidity and temperature of the atmosphere and adapts the optimized UV exposure and flow in the unit (or series of units) to apply the minimum power required to achieve full sterilization. Get the complete report on this technology at: www.techbriefs.com/tow/200905b.html Email: nasatech@yet2.com Phone: 781-972-0600

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Single-Motion Extension Mechanism for Poles

Originally developed and marketed as an extension pole for painting, light bulb changing, and similar operations, the single-motion extension principle in this technology is adaptable to any rod or pole that must be extended and retracted to a compact length. It applies to extendable antennae; tent poles; emergency equipment such as stretchers, cots, or IV poles; tools; robotic arms; or surgical instruments that must extend and retract once in the body. The internal mechanism uses a metal tape similar to that in a retractable tape measure that pushes on the extending tube. The mechanism may be hand-operated or motorized, but either way, a single motion extends the pole. The internal, contained mechanism of the extension pole provides a singlemotion extension to about three times the collapsed length of the assembly. The assembly can be fabricated in a variety of materials in a variety of tensile and compression strengths in multiple segments. The assembly can scale up to greater lengths or be miniaturized to suit the application. Get the complete report on this technology at: www.techbriefs.com/tow/200905a.html Email: nasatech@yet2.com Phone: 781-972-0600

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Odor Removal From Recycled Plastics

This technology removes odors from recycled plastics, especially high-density polyethylene (HDPE). Odors absorbed from household or industrial liquids do not affect physical properties of the polymer, but make the recycled plastic unsuitable for consumer goods. Trace amounts of polyethylene imines blended with the recycled plastic remove aldehyde odors typically resulting from rancid fats and oils. The technology also includes a process for manufacturing odor-free films from recycled plastics. This technology comprises a process for preparing a blend of recycled polymer and polyalkylene imines (PAI). The present technology includes another process for preparing films, molded articles, or thermoformed articles by a compounding or masterbatch process. The method of producing the blend is not material as long as a relatively uniform distribution of the PAI polymer through the recycled polymer is obtained. It is preferred for the blend to have intimate mixing of the polymers, i.e. microscopic distribution of PAI through the recycled polymer. Get the complete report on this technology at: www.techbriefs.com/tow/200904b.html Email: nasatech@yet2.com

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