Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1997-12-23
1998-12-29
Chambers, A. Michael
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
137315, 137571, 222 3, 222195, F16K 3140, B67B 724
Patent
active
058531602
ABSTRACT:
An aerator valve assembly adapted to provide selective fluid communication between a supply of pressurized gas and a pressure vessel and adapted to provide selective fluid communication between the pressure vessel and a bulk material handling structure. The valve assembly includes a valve housing including a valve body, an end cap adapted to be connected to the supply of pressurized gas, and a piston seat having an outlet port adapted to provide fluid communication with the bulk material handling structure. The valve body includes a port adapted to provide fluid communication with the pressure vessel. A piston is located within a chamber of the valve body between the end cap and the piston seat. The piston is selectively slidable between an extended position wherein the piston creates a metal-to-metal seal with the piston seat to seal the outlet port closed and a retracted position wherein the seal is broken. The piston includes a diaphragm that is adapted to engage the piston seat and that includes a plurality of fluid passages adapted to provide fluid communication between the supply of gas and the port of the valve body. The piston includes a cylindrical skirt extending from the diaphragm that slidably engages a bearing on the interior wall of the valve body to provide proper piston alignment. A biasing member extends between the piston and the end cap and resiliently biases the piston from the retracted position to the extended position.
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Burkhart James R.
Hurdis Jason R.
Chambers A. Michael
Martin Engineering Company
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