In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventors' summary information for this patent: "An embodiment of the invention relates to providing a gas flow system that maintains temperature of a gas flowing along a flow path of the system to within a desired temperature range. Optionally the gas flow system is a gas flow system that delivers a precursor gas to a reactor.
"In an embodiment of the invention, the gas flow system comprises at least one flow pipe, in which the gas flows that has a wall configured to provide enhanced contact with the gas so that energy transfer between the wall and molecules of the gas that collide with the wall contributes advantageously to maintaining temperature of the gas within a desired operating temperature range. Contact of a gas with a wall or feature of the gas flow system refers to a frequency of collisions of molecules of the gas with the wall or feature. A flow pipe configured in accordance with an embodiment of the invention to provide desired contact with the gas, that is a desired frequency of collisions between gas molecules and the flow pipe wall, may be referred to as a 'contact flow pipe'.
"In an embodiment of the invention, the contact flow pipe may have a cross section area that increases gradually along its length to provide slow change in pressure of the gas, so that contact between the gas and the wall maintains the gas within a desired temperature range. Optionally, the contact flow pipe may be serpentine to provide enhanced contact between aerosol particles that may be carried by the precursor gas and the wall of the contact flow pipe. The enhanced contact operates to increase a probability that the aerosols will evaporate or be sublimated and removed from the precursor gas. Additionally or alternatively, to provide enhanced contact, the contact flow pipe may be configured so that a cross section of the flow pipe has a circumference equal to or greater than about five times that of a circle having a same area as the cross section. Optionally, the contact flow pipe may have a cross section area that increases gradually along the length of the flow pipe to provide enhanced contact between the gas and the wall
"Optionally, a region of the wall of the flow pipe is maintained at a temperature for which energy transfer between the wall and molecules of the gas that collide with the wall is advantageous for maintaining the temperature of the gas within the desired temperature operating range. The wall temperature may be determined to cause vaporization of aerosol particles of the gas that collide with the wall.
"The contact flow pipe may comprise protuberances that contact the gas. In an embodiment of the invention, the protuberances are maintained at a temperature for which energy transfer between the protuberances and molecules of the gas that collide with the protuberances is advantageous for maintaining the temperature of the gas within the desired temperature operating range and/or for vaporizing or sublimating aerosol particles of the gas. Optionally, the protuberances are fin shaped, and may have an orientation that imparts a desired flow direction to the flowing gas. Optionally, the fin shaped protuberances impart a helical, rotary, or turbulent flow to the gas. Hereinafter helical or rotary flow may be referred to as rotary flow.
"The gas flow system may comprise an energy source, such as an electromagnetic or acoustic energy source, that is controllable to add energy to the gas to maintain the gas at a desired temperature. In an embodiment of the invention, the gas flow system comprises a temperature sensor that acquires measurements of the temperature of the gas and a controller that controls temperature of the wall or the energy source responsive to the acquired measurements.
"In an embodiment of the invention, changes in pressure of a first gas flowing in the flow system in a region of the flow path are moderated to maintain temperature of the first gas within a desired operating range by providing the region with a second gas at a pressure that moderates a rate and magnitude of expansion of the first gas.
"In the discussion, unless otherwise stated, adjectives such as 'substantially' and 'about' modifying a condition or relationship characteristic of a feature or features of an embodiment of the invention, are understood to mean that the condition or characteristic is defined to within tolerances that are acceptable for operation of the embodiment for an application for which it is intended
"This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter."
URL and more information on this patent, see: Laor, Yuval; Laor, Herzel. Gas Delivery System. U.S. Patent Number 8485230, filed
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