Abstract: A quick-connect coupling is disclosed for manually joining together pipe or hose sections or the like. A pair of identical coupling bodies are provided, each containing an elastomeric annular face seal, and adapted for sealing engagement with a corresponding coupling body. Members are provided for releasably joining the coupling bodies together. The coupling forms a fluid-tight seal with its mate under low pressure conditions, yet when the coupling is over-pressured, it does not fail catastrophically.

Abstract: An apparatus for establishing a quick-connect fluid-tight coupling together of hose sections or the like. A pair of identical couplings are provided each interconnected to and terminating a respective hose section and adapted to be aligned along a common co-axis in mutual sealing engagement. Each coupling includes a body member having a circular seal face disposed in a plane perpendicular to the axis. Means are provided on each body member for releasably sealing the seal faces together in fluid-tight engagement by rotation of the body members in opposing directions about the axis. Each body member includes a locking assembly mechanism for automatically locking the respective body members together upon make-up to prevent further relative rotation in either direction or separating movement in the axial direction.

Abstract: A safety interlock device is provided for preventing the opening of a vessel containing a pressurized fluid. In a typical application, the interlock device may be used in industrial applications to prevent the inadvertent unscrewing of a cap from the end of a large pressure vessel containing a hazardous gas. A pressure port end of the interlock body is adapted for threaded engagement with the vessel and is open to vessel pressure. A pressure-responsive locking piston movable within the body prohibits removal of a stem when vessel pressure exceeds a selected minimum pressure. A chain may be secured at each end to the stem and vessel cap, so that the cap cannot be unscrewed to open the container unless the stem is first removed. In one embodiment, the locking piston is prevented from manual override by the position of a second piston and a plurality of ball members locked in a groove.

Abstract: An oil reservoir gland stuffing box employed to extend the service life of the packing by providing an oil reservoir to maintain essential lubrication is provided with an attached container which will receive the overflow of the oil reservoir should the packing begin to leak excessively threatening thereby to create a pollution problem. A predetermined overflow actuates a weight sensitive micro-switch wired to shut off the pumping unit and/or send a warning signal to a remote control station. The control switch incorporates a manual re-set provision to prevent the pumping unit from restarting until the well has been serviced.

Abstract: A molded plastic scraper is molded in place on the sucker rod and as a result of shrink fitting of the material is firmly held in place thereon. Special configurations and materials particularly useful as and in both scrapers and centralizers are disclosed as well as additional unexpected advantages of such scrapers, configurations, and materials. A preferred method and apparatus for the production and manufacture of such scrapers and centralizers are also disclosed.