Abstract: A plug having a pressure release valve for releasing excess pressure within a bladder of the plug. The release valve has a valve core with a pressure release passage therethrough with an inlet in fluid communication with an interior void of the bladder and an outlet in fluid communication with the external environment outside the bladder. An elastomeric seal under hoop stress about a portion of the valve core seals the outlet until overinflation of the bladder causes the seal to become elastically deflected and unseal the outlet, thereby allowing excess pressure to be released. When the overinflation no longer exists because of the pressure release, the hoop stress of the seal causes resealing of the outlet. An inflation valve may also be provided to inflate the bladder, and with the inlet opening into an inflation passageway into the bladder's interior.

Abstract: The present invention addresses provides a clean-out plug that seals a pipe system clean-out that includes a clean-out end and an inner surface, a portion of which is threaded. In general, the clean-out plug includes a compressible sealing member that is retained by the clean-out plug and that seals against an inner surface of the clean-out and/or the back side of the threaded portion of the clean-out. The clean-out plug may also include a cover plate that is secured to the clean-out plug via a second retaining member that engages a first retaining member of the clean-out plug. By sealing against the inner surface and/or back side of the threaded portion of the clean-out, various embodiments of the present invention do not seal within the treaded portion of the clean-out, which is often damaged by cross-threading from previous removals and reinsertions of threaded clean-out plugs.

Abstract: This invention concerns, a sun spot for use as an extension on a vehicle visor of a vehicle where the vehicle visor has a peripheral edge and the vehicle has an interior roof surface and a windshield. The sun spot comprises: a resiliently flexible injection molded shield member of unibody construction having a clip mechanism for adjusting and removing placement of the sun spot along the peripheral edge of the vehicle visor in approximate alignment with a longitudinal axis of the resiliently flexible injection molded shield member. The resiliently flexible injection molded shield member is sized and proportioned for shielding glare without impairing visibility through the windshield and the resiliently flexible injection molded shield member is retainable on the vehicle visor while flexing for comforming with the placement of the vehicle visor against the interior roof surface or the windshield.

Abstract: 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 to the fluid inlet line assembly which is comprised of a first chemical line, a second chemical line and a test media line and to the inflatable packer which has input connectors to receive the first and second chemical lines. The connector valve assembly has a first chemical conduit with an actuatable valve and connectors at opposite ends to transfer a first chemical component. A second chemical conduit with an actuatable valve and having connector means at opposite ends transfers a second chemical component. A valve actuating means is in communication with the second conduit at a location before its valve to simultaneously activate the valves of the first and second conduits.

Abstract: 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 mixing relationship. The outlet nozzles are dome-shaped and contain slot-like apertures to allow the dispensing of the components under pressure and to prevent the clogging re-entry of the components into the valve which would otherwise result from back pressures developed as the components combine and react.

Abstract: 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 rim is constructed in sections which can be transported through a relatively small opening and utilized in a large diameter pipe. Sealant material injected into an open channel between the casings is forced into the void or joint by inflating an inner casing positioned between the outer casings. A flexible liner positioned between the sealant material and the inflatable casings prevents the sealant from adhering to the inflatable casings.