Fluid handling – Systems – Sequentially closing and opening alternately seating flow...
Patent
1991-12-13
1992-10-27
Nilson, Robert G.
Fluid handling
Systems
Sequentially closing and opening alternately seating flow...
251333, G05D 1600
Patent
active
051581116
ABSTRACT:
An improved mechanically actuated pilot valve is shown in which the output pressure from the valve is dependent upon a flapper position rather than upon force is applied to the flapper. The pilot valve has a valve body with a gas inlet chamber, a gas outlet chamber and an inner connecting gas passage for controlling the flow of gas through the valve. An improved poppet having primary and secondary sealing regions cooperates with a valve seat provided in the gas passage and with a hollow actuating stem which protrudes from the valve body to control the flow of control gas through the valve when the actuating stem is contacted by an external actuator, such as a flapper element.
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patent: 4875502 (1989-10-01), Romano
Lambert Floyd
Skaggs Jack
Gunter Jr. Charles D.
Nilson Robert G.
Quality Machine & Supply, Inc.
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