Abstract: A warning device of the disconnection of a tube from another tube, for example, of a respirator canula from a patient's medical equipment comprises: a source of gas under pressure; a pneumatic switch; a filter; an adjustable pressure reducing valve; and a pneumatic cell of the fully open -- fully closed type, supplied by said pressure-reducing valve. A sensing tube terminates in at least one orifice between the walls in contact of two said tubes when they are normally connected and controls the cell. A distributor is supplied by said pressure-reducing valve and controlled at its resting input and at its working input by the cell. At least one alarm means is supplied by the distributor. The said orifice may be an open end of said sensing tube, inserted between the walls in contact of the canula and of the apparatus of the patient.

Abstract: A quick disconnect device for connecting a flexible tube to a poppet valve comprising a valve actuator inserted in the end of the tube, an outer sleeve screwed onto the valve and having an inner recess for receiving an O-ring surrounding the tube behind the valve actuator, the sleeve when tightened being adapted to constrict the O-ring on the tube and open the valve and when loosened to allow withdrawal of the tube.

Abstract: A quick connect coupling is disclosed providing a body assembly having a tube end receiving passage proportioned to closely fit the forward end of a tube. A seal is located in the body assembly to provide a fluid tight joint between the end of the tube and the body assembly. The body assembly also includes a lock ring retaining groove within a nut with an expandable lock ring positioned therein. Mounted on the tube at a location spaced from the end thereof is a locking sleeve which is crimped inwardly toward a tubular insert to lock the locking sleeve in position. The forward end of the locking sleeve is formed with a camming ramp which extends toward a lock ring groove. Assembly of the coupling requires the mere axial movement of the tube end assembly into the body assembly until the seal engages the outer surface of the tube and the lock ring bridges between the nut groove and the lock sleeve groove to permanently connect the tube end and the nut.

Abstract: A transition fitting for connecting plastic conduit to various elements of a fluid transfer system is provided which includes in combination a pressure deformable plastic conduit, rigid sleeve means inserted in one end of said plastic conduit in circumferential contact therewith, a pressure deformable rubbery resilient member extending around the conduit and sleeve in contact with said conduit, compression ring means extending around the conduit and sleeve having a radial face abutting one face of the resilient member and applying compressive pressure thereon, a radially expandable and contractible frusto-conical gripping member, said gripping member surrounding the conduit and sleeve and having a base portion engaging the other side of the compression ring, spaced surface engaging means on the gripper member in contact with the exterior of the conduit, a first body member surrounding the conduit and sleeve and confining the rubbery gasket against outward radial expansion, said body member and compression rin

Abstract: A compression type end fitting for a non-metal flexible tubing wherein the fitting includes a tubing receiving bore terminating at an internal stop shoulder with a continuing smaller diameter throughbore, a nut sub-assembly of a nut and compression sleeve having a nut receiving throughbore has a tubing reinforcing insert loosely retained within the body and nut sub-assembly when the latter are preassembled preparatory to receiving the tubing through the nut sub-assembly. The insert has a circular flange for loosely retaining the insert within the fitting body bore and has a guide end protruding outwardly of the nut sub-assembly when the latter is assembled to the fitting body to provide for an initial engagement with the tubing and for a prealigning of the tubing, insert and nut sub-assembly throughbore preparatory to pressing the tubing into the fitting and final tightening of the nut sub-assembly on to the fitting.

Abstract: In a membrane filter system composed of a plurality of tubular membrane supporting pipes disposed in parallel and arranged to conduct a flow of concentrate under pressure, there is provided a deflection sleeve connecting together the ends of two of the pipes to conduct concentrate between the pipes in such a manner that concentrate is deflected as it passes through the sleeve and such deflection produces forces in the system parallel to the axes of the pipes, and a connecting unit connected between each pipe end and the sleeve for connecting them together and transmitting such axial forces from the sleeve to each supporting pipe.

Abstract: A joint assembly for plastic tubes including an annular caulking element having a substantially triangular cross section, opposite annular ends thereof being adapted to be caulked into the outer peripheral surface of a plastic tube to be connected by the wedging action applied by a fastening structure, said caulking element being composed of two annular members arranged to be axially compressible toward each other while defining an annular groove therebetween, and an annular elastic sealing member being disposed in said groove and being adapted to be bulged out, radially inwardly to be pressed against the outer surface of said plastic tube under said axial compression of said two annular members.

Abstract: The present invention relates to a coupling useful for repairing broken or otherwise damaged tubing. More particularly the invention includes a coupling body member which accepts the cut ends of the tubing being repaired, a pair of washer-seals one for each tubing end and a pair of locking rams which drive the washer seals into the coupling body member and into an expanded fit thereby providing a secure fitting. The rams are threadably received into the coupling body member and locked thereon against unintentional reverse rotation.

Abstract: A fitting, for pipe of flexible plastic material, having improved sealing and mechanical holding characteristics. The fitting includes a main body having an external screw thread terminating at a shoulder from which a coaxial, reduced-diameter, nipple projects. Annular saw tooth or buttress ribs on the nipple are dimensioned to have a slip fit into the interior of a plastic pipe section. A collet is slideable on the exterior of the pipe section into abutment with the shoulder and is radially compressed by a collet sleeve threaded onto the external threads of the fitting body. Axial slots in the collet open alternately at opposite ends of the collet so that radial compression is achieved over the entire length of the collet. Saw toothed or buttress annual ribs on the collet interior bite into the exterior surface of the pipe section in opposition to the ribs on the inserted nipple, the pipe wall being thereby radially clamped between the collet and nipple.

Abstract: A recoilable air hose having a two-piece swivel fitting.

Abstract: A meter riser for connecting normally buried plastic pipe to metallic couplings which are normally disposed above the ground for connection with utility meters, such as gas meters and the like, and comprising means for connecting the plastic pipe being encased in a metallic sheath, and having insulating means disposed around at least a portion of the metallic sheath and plastic pipe in the proximity of the connecting means securing the plastic pipe to the metallic coupling for protecting the plastic pipe against adverse environmental conditions.