Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 47 for “"Bellows"”.
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Pressurized Metal Bellows Shock Absorber for Space Applications.
… To address these issues, a pressurized metal bellows shock absorber is proposed. This shock absorber could operate at nearly any expected spacecraft environment. Metal bellows are designed to operate from cryogenic temperatures to several hundred degrees Celsius. A hermetically sealed system …
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Welding fixture design for irregular profile metal bellows
… is presented that can be used to weld Metal bellows of any shape. The bellows are made of thin stainless diaphragms welded together. Currently there is no established method for welding non-circular bellows that is both low cost and reliable. This thesis addresses some of the issues with the …
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"The Bellows / of Experience": The Modernist Love Poem and Its Legacy
The vein of experimental love poetry examined in this project takes advantage of the friction generated by charging both form and content with innovation. The troubled relationship between sex and power is knit directly into the long and dynamic history of love poetry, but there has yet to be a …
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The analysis and design of a pressure-measuring syringe utilizing elastomeric bellows
… tube. This device takes the form of elastomeric bellows. These bellows were analyzed to determine the optimum geometry for the pressures involved in the procedure. Although no closed-form model exists for this analysis, FEA was used to obtain accurate results. Using the optimized bellows, a …
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A Biologically Inspired Soft-Bodied Bellows-Driven Stomach Robot: Concept, Design and Validation
… on prototypes. The results lead to novel bellows-driven soft pneumatic actuators (SPA) that provide high linear displacement. This actuator is developed, modelled, and validated to be a suitable actuator for the soft robotic stomach simulator (SoRSS) application. A ring-shaped actuator …
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Fatigue Life Prediction of Edge-Welded Metal Bellows Using Neural Networks and Multiple Linear Regression
<p>Edge-welded metal bellows present an ongoing challenge: the prediction of an accurate cycle life. Current methods rely on physical leak detection to determine a bellow's cycle life to failure. It is known, however, that crack initiation begins many cycles before a leak path is present. Bellows …
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Design, Manufacturing, and Control of Soft and Soft/Rigid Hybrid Pneumatic Robotic Systems
… two different methods to create layered bellows actuators, which can be made with a heat press machine or in an oven. We also describe origami-like actuators with possible corner structures. Moreover, the fabrication process permits the creation of soft and soft/rigid hybrid robotic …
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Development of a simplified negative pressure wound device
… and analyzed for possible implementation: bellows pumps, bladder pumps, and rolling diaphragm pumps. The bellows pump is chosen for the final design, and is analyzed in preparation for manufacture. Once manufactured, the bellows pump will be used in clinical trials at the Shriners Bum …
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A device for the treatment of adult Sleep Apnea Syndrome
… electronically-controlled positive-displacement bellows-type air pump has been developed in the Bio-medical Engineering Laboratory for the treatment of adult Sleep Apnea Syndrome (SAS). An electronically-controlled positive-displacement pump has been employed in order to eliminate the pressure …
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Low cost solar powered water pump
… of the fluid is utilized to move flexible bellows, resulting in the pumping action. The thermodynamic and heat transfer aspects of the system have been modelled and the results were compared with the experimental data. A number of working fluids were attempted and the final results show …
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Non-intrusive load monitoring for existing water and natural gas metering infrastructure
… non-intrusively extracting flow from these and bellows-and-diaphragm natural gas meters, and signal processing techniques for reconstructing flow from measured data to enable cheap and easy retrofit of existing metering infrastructure for NILM.
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Engineering a human Factors analysis of a novel one Atmosphere Diving Suit (ADS) elbow joint
… joints, widely in use today, in that it is a bellows type joint which allows sixty degrees of motion in plane. The engineering required to allow this joint to operate under pressure is to maintain a constant volume as it travels throughout its range of motion. If volume changes while subjected …
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Segmented breast treatment planning incorporating 4D data acquisition
… of time to be added to the process through a bellows devise and post processing. This paper identifies that, unlike other methods of utilizing 4-D technology (which add time and may require the purchase of additional equipment), selecting a mid point phase of the breathing cycle is an …
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High Temperature and High Pressure Determination of the Viscosity and Density of Bitumen as well as the Mutual Solubility of a Bitumen and Water Mixture
… reservoirs. This work utilizes a variable-volume bellows cell with a custom viscometer to measure density and viscosity for a Christina Lake bitumen and Christina Lake bitumen/water mixtures at 13.8 MPa (2000 psig) up to 300⁰C. Mutual solubility and composition is determined from samples using …
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Predictors of obstructive lung disease among seafood processing workers along the west coast of the Western Cape of South Africa
… method) conducted using Vitallograph S-model bellows volume-time spirometers according to ATS guidelines. Serum omega-3 and omega-6 fatty acid levels also analysed to examine the association between dietary fatty acids and asthma outcomes. Multivariate regression models were developed for …
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Carbon nanotube based electromechanical probes
… buckle formation which later can serve as micro-bellows and elastic springs.
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Design, measurement, and analysis of oxygenated fluid pump system
… fluid by means of a low-density polyurethane bellows, which is powered by a stepper motor. A peristaltic pump simultaneously pumps saline fluid in another branch of the system. The two branches come together, the fluids are mixed, and bubbles are removed before the fluid is ready to be …
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The effect of voltage wave form on the operation of two types of current overload relays
… Type PAC, a plunger type relay with an air bellows time delay, is, in general, retarded in operation by the application of non-sinusoidal potential waves. The operation may be slightly accelerated, however, if the wave distortion is slight, the current setting is low, and the distortion is …
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