4. Measuring and testing
  5. Vibration
  6. Sensing apparatus

Paul D. Engdahl

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Automatic safety shutoff valve

Valves and valve actuation – Permanent or constantly energized magnet actuator
Patent

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Automatic safety shutoff valve

Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent

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Earthquake actuated automatic gas shutoff valve

Fluid handling – Control by change of position or inertia of system
Reissue Patent

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Earthquake actuated automatic gas shutoff valve

Fluid handling – Control by change of position or inertia of system
Reexamination Certificate

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Earthquake actuated horizontal valve with micro switch

Fluid handling – Processes
Reexamination Certificate

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Profile ID: LFUS-PAI-P-316292

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