|4572228||Connector valve assembly for inflatable packer device|
The connector valve assembly is for insertion between a fluid inlet line assembly and an inflatable packer device having an externally disposed chemical dispensing assembly to pressure test and repair pipelines. The connector valve assembly is connectable...
|4096997||Dual outlet check valve assembly|
A non-clogging check valve assembly useful in the simultaneous dispensing of individual components of a two-part grouting material. Two opposed flexible outlet nozzles mounted adjacent one another in a body member allow the components to be dispensed in a...
|3951173||Method and apparatus for sealing large diameter pipes|
An inflatable packer positionable in the interior of pipes for packing a sealant material into a void or joint in the pipe wall. Inflatable outer casings mounted on a support rim are utilized to seal off the area surrounding the void or joint. The support...