Apparatus and method for damming a pipeline
Apparatus for blocking fluid flow through a conduit
Apparatus for blocking fluid flow through a conduit responsive t
Apparatus for instantaneously terminating movement of flow...
Ballast exhaust pipe closing appliance for a ship
Bladder system for reinforcing a portion of a longitudinal...
Closure device with dual-mandrel-acutated peripheral seal
Closure plug assembly
Closure plug assembly
Compressed-ring pneumatic pipe plug
Conduit closure system for closing a conduit having a gripless i
Conduit for paint
Cup type pipeline inflation anchor
Drain pipe plug device
Dual seal nozzle dam and alignment means therefor
Expandable plug for drain pipes
Expansible pneumatic plug device
Expansion bulb for plugging a conduit or passage
Flexible emergency gas pipeline plug
Flexible tube means, especially for an expansible valve