Resources Contact Us Home Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE     Device for the selective injection of an oxidizing gas or a carrier gas with or without carbonaceous material to a liquid metal bath Image Number 10 for United States Patent #4693274. This invention relates to a device used in the selection between two fluids that are to be injected into a liquid metal contained in a metallurgical converter: an oxidizing gas and another gas conveying powdered carbonaceous material; both fluids arrive through different conduits to a selecting valve located at the bottom of a metallurgical converter just before a single conduit tuyere for leading one of the fluids to the liquid metal by means of the selective mechanism in such valve. The valve design and operation avoids the possibility of mixing the oxidizing gas with the carbonaceous powder in any part of their path up to the metal bath by providing separate passages for each fluid and one inert gas purge passageway between said passages, and further including a safety mechanism which provides control means for the fluid to be correctly injected by avoiding the transport of the oxidizing gas or the carbonaceous material if the corresponding movable passage within the valve body is not correctly and precisely positioned.       Recently Added Patents Separation of pyrophosphate release and pyrophosphate detection Balanced microstrip folded dipole antennas and matching networks LED controller with compensation for die-to-die variation and temperature drift Image processor, image processing method and program Inverted pendulum type vehicle Slurry composition containing cracking agent Overmolded rotor   Randomly Featured Patents Systems and methods for providing a scan Differential planetary gear system for producing complementary levels of forward/reverse drive Method and system for controlling MEMS switches in an integrated circuit package Miscanthus plant named `Lottum` Integrated reconfigurable polarizer Method and apparatus for enlarging a charged particle beam Testing a memory device having field effect transistors subject to threshold voltage shifts caused by bias temperature instability Food mixer Systems and methods for implanting and examining intraocular lens Method of production of cross-fin type heat exchanger © 2006-2008 PatentGenius. All Rights Reserved.