Abstract: A plug and socket cleanout assembly for fluid transmission lines, storage tanks, and like receptacles comprises a socket connectible to the receptacle and communicating therewith. A plug is removably seated in the socket, there being a relatively tapered interface between the plug and socket. Seal means is seated at the interface. Interengaging means carried by the plug and socket releasably interengage these two members in sealed relation to each other when the plug is seated in the socket. Pressure relieving means mounts in the plug and is manually operable to vent excess pressure from the receptacle.

Abstract: Winding apparatus for the manufacture of fiberglass pipe and other filament-wound, reinforced resinous products comprises a rotatable mandrel; a vat stationed adjacent the mandrel and adapted to contain a quantity of liquid, settable resin; and a reciprocating carriage assembly supporting the vat. The filamentous reinforcing material is guided across the top of an applicator roll rotatably mounted within the vat thereby impregnating the filaments with resin. The impregnated filaments then are squeegeed and guided onto the mandrel, the rotation of which pulls the filaments through the vat. As the carriage mounting the vat reciprocates, the filaments are wound on the mandrel in a predetermined pattern to produce the finished filament-wound, reinforced resinous product.