Abstract: A method and device for pressure testing a pipe line is provided wherein a fitting is inserted into the pipeline by inserting male ends of the pipeline into female ends of the fitting to define a flow path through the fitting extending along a longitudinal axis. The fitting has an internal boss extending around a circumference of the flow path and extending radially inward toward the centerline a distance corresponding to the wall thickness of the mating male ends of the pipes so the pipes and boss define a periphery of the flow path through the fitting. A recess is formed in the boss to sequentially receive two slides. An externally accessible port allows a test slide to be inserted into the recess, with the test slide sealing against the walls defining the recess to form a fluid-tight seal for pressure testing the line. The test slide is removed and a finish slide is inserted into the recess.

Abstract: A method and device for pressure testing a pipe line is provided wherein a fitting is inserted into the pipeline by inserting male ends of the pipeline into female ends of the fitting to define a flow path through the fitting extending along a longitudinal axis. The fitting has an internal boss extending around a circumference of the flow path and extending radially inward toward the centerline a distance corresponding to the wall thickness of the mating male ends of the pipes so the pipes and boss define a periphery of the flow path through the fitting. A recess is formed in the boss to sequentially receive two slides. An externally accessible port allows a test slide to be inserted into the recess, with the test slide sealing against the walls defining the recess to form a fluid-tight seal for pressure testing the line. The test slide is removed and a finish slide is inserted into the recess.

Abstract: The invention disclosed herein comprises a self-contained breathing apparatus regulator having a valve seat for overlying the crown of an orifice wherein high pressure gas is regulated by said valve seat into said orifice. The valve seat has a valve seat body of an inverted T shaped configuration. The upright portion of the T shaped configuration is seated within a spring block assembly having a seal around said upright portion. A continuous plastic coating is provided around the valve seat body into the zone of said orifice and beyond the zone of said seal so as to expose the junction only to intermediate pressure to prevent delamination of the plastic from the valve seat body.

Abstract: An adjustable regulator of the type having fluid coupling oil within a cavity exposed to ambient pressure and overlying a diaphragm which operates based upon imbalances of said ambient pressure and an intermediate pressure zone on the other side of said diaphragm. The adjustment of the spring on the diaphragm is accomplished by means of a cap screw which is screwed into the sidewalls of the regulator within the cavity holding the oil. The oil is prevented from draining from the cavity by a second diaphragm overlying the oil in the cavity which can flex based upon changes in ambient pressure. The cap screw has a threaded extension in the form of a stem and tool surface on the other side of said stem for turning said cap screw.

Abstract: A first stage scuba regulator operates to supply breathable air at a pressure of say, about 125 psi above ambient to a second stage demand regulator. The first stage regulator includes a piston subjected on one side to ambient pressure, and on the other to downstream air pressure, and so arranged as to open when the ambient pressure overpowers downstream pressure by a preset amount determined by a bias spring and to close when downstream pressure rises to the present amount. Instead of directly conducting outside water to the first side of the piston, an inert barrier fluid of high molecular weight is used that fills the piston chamber. Low temperature silicone grease is the preferred material. The barrier fluid is retained by a porous closure that offers very limited restriction to the flow of water, but significantly greater resistance to the flow of the barrier fluid.

Abstract: A power deflator for a buoyancy vest includes a Venturi tube attached to the vest fitting. A mouthpiece control unit has an actuator movable in a path. Initial movement opens a conduit for slow deflection powered by ambient pressure. Continued movement of the actuator sends pressurized air through the Venturi tube for faster deflation of the vest.