Patent ID: 7565916
Filing Date: 2009-07-28
Classification: F16K,Y10T

Abstract:
1. A pneumatic oscillating valve comprising: a housing defining an internal chamber and comprising: an annular seat extending into the internal chamber at a perimeter of the inlet passageway; a diaphragm disposed in the internal chamber and comprising a sealing portion adapted to seat against the annular seat and separate the inlet passageway from fluid communication with the outlet passageway; and a biasing spring engaging the diaphragm to seat the diaphragm sealing portion against the annular seat; wherein the inlet passageway is more restrictive to fluid flow than the outlet passageway enabling the pneumatic oscillating valve to cyclically admit and interrupt fluid flow from the inlet passageway to the outlet passageway, and wherein the housing defines an exhaust passageway in fluid communication with the inlet passageway and the exhaust passage comprising a flow restriction.