A fitting for coupling a first conduit with a second conduit includes a body member including a first threaded portion at a first end of the body member, the first threaded portion having a first external thread and defined internally by a through-bore, a second threaded portion at a second end of the body member, the second threaded portion having a second external thread and defined internally by the through-bore, the second threaded portion being configured to engage the second conduit, and a third threaded portion between the first and second threaded portions, a first nut member and a second nut member, each having internal threads configured to mate with threads of the third threaded portion, the internal threads being complementary with threads of the third threaded portion, and a compression fit assembly configured to be in threaded association with the first external thread and to form a sealing engagement with the first conduit, wherein the first, second, and third threaded portions of the body member are monolithically formed.

A two-piece replaceable union nut for repairs on shipboard high pressure air systems. The replacement union nut is employed when an existing union nut has failed (i.e. cracked or broken) or has been identified as sub-standard due to material type or some other shortcoming, but the piping, tailpiece and thread piece are still in satisfactory condition. The two pieces fit around the pipe and mate using machined notches to form a complete union nut that is constrained in all directions and dimensionally equivalent to a standard union nut. The two-piece union nut facilitates replacement of a union nut in service without the need for cutting piping and reattaching the accompanying tailpiece, and testing the system as conventionally required.

An anti-rotation device for preventing a hydraulic connector assembly from leaking. Various embodiments of the anti-rotation device provide a mechanism whereby threadably engaged connectors, such as compression fittings, are permitted to rotate only a fraction of a turn after loosening. For many applications, the limited degree of loosening is sufficient to prevent the onset of leaking. Structurally, the anti-rotation device can include a band that is secured to a female nut of a hydraulic connector. Protrusions extend laterally from the band and engage with a stop tab on the male body of the hydraulic connector assembly, thereby limiting rotation of the female nut that would otherwise cause leaks. Locking provided by zip tie structures proximate the free ends of the anti-rotation device.

An apparatus for coupling together tubular components is described herein. The apparatus includes a coupling assembly with a coupling device having threads and an internal groove. The coupling assembly also includes a retainer clip positionable in the internal groove. The retainer clip is biased to apply a radially outward force against the internal groove when the retainer clip is positioned in the internal groove. The coupling assembly includes a ferrule, coupleable to the coupling device, in contact with the retainer clip when coupled to the coupling device to form an electrically conductive path through the coupling device, the retainer clip, and the ferrule. The retainer clip is configured to prevent movement of the coupling device relative to the ferrule when the retainer clip has an unbiased inner diameter smaller than an outer diameter of the ferrule or the retainer clip is not properly inserted into the internal groove.

Disclosed is a structure for preventing a leak at a synthetic resin tube joint, which includes a synthetic resin tube including a tapered portion at an end portion; a ferrule inserted into the end portion of the synthetic resin tube and including a tapered portion corresponding to the tapered portion of the synthetic resin tube; a fitting which accommodates the synthetic resin tube and the ferrule, and includes a tapered portion corresponding to the tapered portion of the synthetic resin tube and a protrusion formed on the tapered portion of the fitting, and a nut which engages with the fitting.

A connector has a cylindrical sleeve device having a first part, with an external screwthread on its outer side, and a second part, with an internal screwthread on its inner side. One of the screwthreads engages a corresponding screwthread on a further part when the device is in use. At least a portion of the said second part is yieldable. A locking part is provided with a screwthread which engages the other of the screwthreads of the cylindrical sleeve device when the connector is in use. The second part and the locking part have mutually engageable portions which, when the locking part is tightened relative to the cylindrical sleeve device, interengage to cause yielding of the second part or yieldable portion thereof. This effects locking of the cylindrical sleeve device with respect to such a further part when the connector is in use.

A fitting for use with metal, corrugated tubing having peaks and valleys, the fitting includes a nut configured to receive the tubing; a sealing member for placement in a valley of the tubing, the sealing member including a sealing surface; and an adaptor configured to be press fit into the nut, the adaptor including an adaptor sealing surface; wherein upon assembly, the adaptor is press fit into the nut and the tubing is compressed between the adaptor sealing surface and the sealing surface.

A pipe connection for conducting a fluid that is under pressure is provided, having two tubular connection parts for a conical clamping connection, which are screwed together by a union nut while one is inserted in the other, wherein each connection part has a conical sealing surface that contacts the other in a sealing manner and wherein an annular groove is provided in one of the sealing surfaces. In order to enable the pipe connection also to conduct a fluid having cycling or varying temperature, the inner of the two connection parts has thermal insulation on the inside of the pipe at least in the axial segment of the sealing surface of the connection part, wherein the thermal insulation tube has a cam or a collar on the outer surface, which engages in a recess, which is axially bounded by the two connection parts.

A pipe connection for conducting a fluid that is under pressure is provided, having two tubular connection parts for a conical clamping connection, which are screwed together by a union nut while one is inserted in the other, wherein each connection part has a conical sealing surface that contacts the other in a sealing manner and wherein an annular groove is provided in one of the sealing surfaces. In order to enable the pipe connection also to conduct a fluid having cycling or varying temperature, the inner of the two connection parts has thermal insulation on the inside of the pipe at least in the axial segment of the sealing surface of the connection part, wherein the thermal insulation tube has a cam or a collar on the outer surface, which engages in a recess, which is axially bounded by the two connection parts.

A connection between a first tubular member and a second tubular member includes a first tubular end, a second tubular end, a load shoulder member threadable onto the first tubular end, and a nut receivable around the first tubular end and the load shoulder member and threadable onto the second tubular end. The connection also includes a keyway disposed axially between the load shoulder member and the second tubular end, wherein the keyway is also disposed through the load shoulder member and into the first tubular end to receive a key member.