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Pilot valve

Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Reexamination Certificate

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Pilot valve

Fluid handling – Systems – With selective motion for plural valve actuator
Patent

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Pilot valve apparatus

Fluid handling – Systems – With selective motion for plural valve actuator
Patent

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Pilot valve assembly

Fluid handling – Systems – With selective motion for plural valve actuator
Patent

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Pilot valve assembly

Fluid handling – Convertible – Unit orientable in a single location between plural positions
Patent

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Pilot valve comprising a valve seat arrangement

Fluid handling – Systems – Sequentially closing and opening alternately seating flow...
Reexamination Certificate

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Pilot valve for an oil and gas separator

Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent

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Pilot valve for control valves and method of operation

Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent

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Pilot valve for pneumatic control systems with improved poppet

Fluid handling – Systems – Sequentially closing and opening alternately seating flow...
Patent

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Pilot valve for subsea test valve system for deep water

Fluid handling – Systems – Supply and exhaust
Patent

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Pilot valve including a hydraulically actuated detent

Fluid handling – Systems – With selective motion for plural valve actuator
Patent

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Pilot valve initiated mud pulse telemetry system

Fluid handling – Systems – Programmer or timer
Patent

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Pilot valve manifold

Fluid handling – Systems – Supply and exhaust
Reexamination Certificate

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Pilot valve mechanism for high or low pressure cut-off control

Fluid handling – Systems – Multi-way valve unit
Patent

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Pilot valve mechanism for high or low pressure cutoff control

Fluid handling – Systems – Multi-way valve unit
Patent

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Pilot valve operated demand regulator for a breathing apparatus

Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent

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Pilot valve operated pressure reducing valve

Fluid handling – Systems – Multi-way valve unit
Patent

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Pilot valve operated pressure regulator

Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent

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Pilot valve with fusible lockout knob

Fluid handling – Destructible or deformable element controlled – Heat destructible or fusible
Patent

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Pilot valve with improved cage

Fluid handling – Processes – Cleaning – repairing – or assembling
Patent

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