Patent ID: 7383860
Filing Date: 2008-06-10
Classification: F16K,Y10T

Abstract:
1. A flow valve for gases or liquids comprising: a first stage valve seat located on a flow aperture; a mount located radially inward from the first valve seat within the aperture, wherein the mount defines a single contiguous first passage connected in parallel with and concentric to a single contiguous second passage; a first stage pintel sized to interface with the first stage valve seat, wherein the first stage pintel is structured to adjustably increase, decrease or stop the flow of gasses or liquids through the first passage, the first stage pintel further structured to be selectively positioned at a location intermediate of its fully opened and fully closed positions; a second stage pintel located concentrically with the first stage pintel wherein the second stage pintel has a smaller diameter than the first stage pintel and is structured to adjustably increase, decrease or stop the flow of gasses or liquids through the second passage, the second stage pintel further structured to be selectively positioned at a location intermediate of its fully opened and fully closed positions; and control means for adjustably controlling the first and second stage pintels to adjustably increase or decrease the flow of gases or liquids through each of the first and second passages to provide a desired flow of gasses or liquids through the flow valve.