Patent application number | Description | Published |
20090315335 | ENERGY HARVESTING BY MEANS OF THERMO-MECHANICAL DEVICE UTILIZING BISTABLE FERROMAGNETS - An inventive energy harvesting apparatus may include a ferromagnetic material and/or a shape memory alloys to convert thermal energy to mechanical energy to electrical energy. The apparatus is subjected to a thermal gradient to cause beams to bend thus creating stress/strain in a piezoelectric material, or creating magnetic flux in a magnetic path. The charges created in this process can be transferred to electrical batteries. | 12-24-2009 |
20090322184 | Energy Harvesting Using Frequency Rectification - An energy harvesting apparatus includes an inverse frequency rectifier structured to receive mechanical energy at a first frequency, and a solid state electromechanical transducer coupled to the inverse frequency rectifier t receive a force provided by the inverse frequency rectifier. The force, when provided by the inverse frequency rectifier, causes the solid state transducer to be subjected to a second frequency that is higher than the first frequency to thereby generate electrical power. | 12-31-2009 |
20120267982 | NON-CONTACT MECHANICAL ENERGY HARVESTING DEVICE AND METHOD UTILIZING FREQUENCY RECTIFICATION - An energy harvesting apparatus includes an inverse frequency rectifier structured to receive mechanical energy at a first frequency, and a solid state electromechanical transducer coupled to the inverse frequency rectifier to receive a force provided by the inverse frequency rectifier. The force, when provided by the inverse frequency rectifier, causes the solid state transducer to be subjected to a second frequency that is higher than the first frequency to thereby generate electrical power. The coupling of the solid state electromechanical transducer to the inverse frequency rectifier is a non-contact coupling. | 10-25-2012 |
20140042574 | TUNABLE AND METASTABLE FERROELECTRIC MATERIALS AND MAGNETO-ELECTRIC DEVICES - A ferroelectric device includes a first electrode, a second electrode spaced apart from the first electrode, and a ferroelectric element arranged between the first and second electrodes. The ferroelectric element has a plurality of quasistatic strain configurations that are selectable by the application of an electric field and the device has selectable electromechanical displacement by the application of the electric field. | 02-13-2014 |
20140197910 | MAGNETOELECTRIC CONTROL OF SUPERPARAMAGNETISM - A magnetoelectric composite device having a free (i.e. switchable) layer of ferromagnetic nanocrystals mechanically coupled a ferroelectric single crystal substrate is presented, wherein application of an electrical field on the composite switches the magnetic state of the switchable layer from a superparamagnetic state having no overall net magnetization to a substantially single-domain ferromagnetic state. | 07-17-2014 |
20140249614 | THIN FILM VASCULAR STENT AND BIOCOMPATIBLE SURFACE TREATMENT - A vascular implant, comprising a sheet comprising thin film nickel titanium (NiTi), wherein the sheet has at least one super-hydrophilic surface having a water contact angle of less than approximately 5 degrees. The sheet is configured to have a compacted form having a first internal diameter and a deployed form having a second internal diameter larger than the first internal diameter. The sheet may be delivered into a blood vessel in the compacted form and expanded to its deployed form at a treatment location within the blood vessel, wherein the stent is configured to expand onto an internal surface of the blood vessel and exert a radial force on said internal surface. | 09-04-2014 |
20140249620 | ULTRA-LOW FRACTIONAL AREA COVERAGE FLOW DIVERTER FOR TREATING ANEURYSMS AND VASCULAR DISEASES - A flow diverter is described and fabricated using ultra-thin porous thin-film Nitinol, and is configured for implantation to a treatment site within a vessel for significant reduction in an intra-aneurismal flow velocity and vorticity. Using small size pores in a coverage area of only 10%, a 90% reduction in flow velocity into a pseudo-aneurysm can be achieved, with an almost immediate cessation of flow into an anatomical feature such as aneurysm sac in vivo. The size of the holes can be tailored to be any shape and range in size from 1-400 μm using photolithography and from 5-1000 nm using ebeam lithography. | 09-04-2014 |
20160000553 | THIN FILM VASCULAR STENT FOR ARTERIAL DISEASE - A thin film nitinol stent cover is provided that includes a plurality of fenestrations. Each fenestration extends in both longitudinal and transverse dimension, wherein the longitudinal and transverse dimensions are both less than or equal to a critical dimension that inhibits muscle cell migration through the fenestrations. | 01-07-2016 |
20160005949 | DEVICES AND METHODS FOR CONTROLLlNG MAGNETIC ANISTROPY WITH LOCALIZED BIAXIAL STRAIN IN A PIEZOELECTRIC SUBSTRATE - Devices and methods for controlling magnetic anisotropy and orientation of magnetic single domain structures between stable states are provided based on piezoelectric thin films and patterned electrodes. By using patterned electrodes, piezoelectric strain is manipulated to achieve a highly localized biaxial strain in a piezoelectric substrate and rotate the magnetic anisotropy of magnetic materials. Reorientation of a magnetic single domain between different stable states is accomplished by pulsing voltage across pairs of electrodes. Since only a small region surrounding the electrodes is strained, the methods can be applied to arrays of indexed magnetic elements and to piezoelectric thin films clamped to silicon base substrates. | 01-07-2016 |