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2788 results about "Coolant flow" patented technology

Coolant flow is either laminar or turbulent, or in transition between laminar and turbulent. For laminar flow, heat transfer increases proportional to the cube root of the flow rate.

Cell necrosis apparatus with cooled microwave antenna

InactiveUS20050245920A1Minimize potential for bucklingSmall sizeElectrotherapySurgical instruments for heatingElectricityCoolant flow
A cell necrosis apparatus for delivering thermal microwave energy to a specific site in a body, including: a. a microwave generator, b. a coolant delivery system for delivering and circulating a quantity of cooled liquid coolant via inlet and return passageways, c. a probe including a probe handle and a probe body having a proximal portion coupled to the probe handle and a distal portion, d. a microwave antenna in the distal portion of the probe body for applying thermal microwave energy to a specific site in cell necrosis treatment, and e. a microwave transmission line extending from the microwave generator to and through the probe handle and to and through the probe body to the microwave antenna and electrically coupled thereto, where the inlet and return coolant flow passageways extend from the coolant delivery system to and through the probe handle and thence extend coaxially about the microwave transmission line and along the length thereof within the probe body, and extend coaxially about the antenna and long the length thereof within the probe body, and where a first of the inlet and return coolant flow passageways is radially outward of and immediately adjacent the microwave transmission line and the antenna within the probe body and the other of the inlet flow passageways is radially outward of the first flow passageway.

Powder feeder for material deposition systems

A method and apparatus for embedding features and controlling material composition in a three-dimensional structure (130) is disclosed. The invention enables the control of material characteristics, within a structure (130) made from a plurality of materials, directly from computer renderings of solid models of the components. The method uses stereolithography and solid model computer file formats to control a multi-axis head (480) in a directed material deposition process (123). Material feedstock (126, 127) is deposited onto a pre-heated substrate (19). Depositions (15) in a layer-by-layer pattern, defined by solid models (141, 146), create a three-dimensional article having complex geometric details. Thermal management of finished solid articles (250-302), not available through conventional processing techniques, is enabled by embedded voids (152) and/or composite materials (126, 127), which include dissimilar metals (210, 216). Finished articles control pressure drop and produce uniform coolant flow and pressure characteristics. High-efficiency heat transfer is engineered within a solid structure by incorporating other solid materials with diverse indexes. Embedding multi-material structures (132, 134) within a normally solid component (141) produces articles with diverse mechanical properties. Laser and powder delivery systems (420, 170) are integrated in a multi-axis deposition head (480) having a focused particle beam (502) to reduce material waste.
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