Multi-stage air pressure apparatus and a bi-directional pneumatic conveyance system incorporating such apparatus
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United States of America Patent
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Dec 26, 2006
Grant Date -
Jun 5, 2003
app pub date -
Sep 18, 2002
filing date -
Dec 5, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A multi-stage pressure/vacuum apparatus is disclosed for a bi-directional pneumatic delivery system or the like. The apparatus includes separated turbines or separated sets of turbines that are operated independently of each other to alternatively create pressure and vacuum conditions for an external system such as a pneumatic delivery network relying upon the inventive apparatus for pressure and/or vacuum generation. A common housing contains both turbine sets and defines a system of internal chambers and valve mechanisms between them. The valve mechanisms respond to internal pressures created within the housing by the turbines, and preferably also to gravity in order to control air flow patterns through the housing and between the housing and an external system. According to the present invention, the turbines of the two turbine sets can be operated concurrently at maximum capacity or separately if air power requirements are lesser. The present invention also contemplates a method of creating pressure or vacuum conditions with the inventive apparatus disclosed. The present invention further contemplates a bi-directional pneumatic delivery system including the multi-stage pressure apparatus disclosed.
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