A pipe fitting includes a fitting body defining an inner surface, an outer surface, a first fitting end, and a second fitting end, the inner surface defining a channel extending from the first fitting end to the second fitting end, a portion of the inner surface defining a tapered region tapering towards the first fitting end; and an engagement assembly comprising a metal grip ring received in the channel, the metal grip ring defining a substantially frustoconical ring body, the ring body defining a diameter that tapers from a first lateral end of the ring body to a second lateral end of the ring body, the engagement assembly configured to slide along the tapered region.

A pipe coupling segment includes an arcuate body portion defining a first end, a second end opposite the first end, a first axial side, and a second axial side opposite the first axial side; a hook extending from the first end of the arcuate body portion, wherein the hook defines a shank portion and a bend portion, the shank portion extending in a substantially radially outward direction from the arcuate body portion and the bend portion extending in a substantially axial direction from the shank portion, the bend portion defining an upper engagement surface, the upper engagement surface defining a sloped portion angled rearwardly towards the shank portion; and a fastener lug extending from the second end of the arcuate body portion.

A combined quick connector structure for fuel feed and return system may include a cover assembly; a lever mechanism along the inside walls of the fuel feed and fuel return openings of the cover assembly; a pawl and ratchet mechanism on either side of the cover assembly; a rib on either side of a connector assembly; the connector assembly with retainer elements for engine feed and engine return lines and fuel feed and return lines; actuator pads provided on the external and internal circumference of the openings of connector assembly; a locking mechanism on the inside circumference of the retainer elements for the fuel feed line and fuel return line; and a lever mechanism configured for hinging the cover assembly together with the connector assembly.

A combined quick connector structure for fuel feed and return system may include a cover assembly; a lever mechanism along the inside walls of the fuel feed and fuel return openings of the cover assembly; a pawl and ratchet mechanism on either side of the cover assembly; a rib on either side of a connector assembly; the connector assembly with retainer elements for engine feed and engine return lines and fuel feed and return lines; actuator pads provided on the external and internal circumference of the openings of connector assembly; a locking mechanism on the inside circumference of the retainer elements for the fuel feed line and fuel return line; and a lever mechanism configured for hinging the cover assembly together with the connector assembly.

A pipe coupling segment includes an arcuate body portion defining a first end, a second end opposite the first end, a first axial side, and a second axial side opposite the first axial side; a hook extending from the first end of the arcuate body portion, wherein the hook defines a shank portion and a bend portion, the shank portion extending in a substantially radially outward direction from the arcuate body portion and the bend portion extending in a substantially axial direction from the shank portion, the bend portion defining an upper engagement surface, the upper engagement surface defining a sloped portion angled rearwardly towards the shank portion; and a fastener lug extending from the second end of the arcuate body portion.

A method for manufacturing a resin pipe joint with a joint body includes the following steps. Preparing a mold and a supply device configured to supply molten resin. The mold includes a first mold for an outer shape of the joint body and a second mold for an inner shape of the joint body. Combining the second mold with the first mold to form a cavity, into which the molten resin is injectable, inside the mold. Supplying the molten resin to the cavity in the mold. Solidifying the molten resin in the cavity after stop of the supply of the molten resin from the supply device. The second mold has a gap that connects the cavity to a discharge space outside the cavity and allows gas to flow.

A resin tube fitting has a body with a sleeve allowing the longitudinal end of the tube to be put therein, an inner ring with a press-in portion configured to be pressed in the longitudinal end of the tube, and a union nut with a connector configured to be screwed to an outer periphery of the body to allow the longitudinal end of the tube to be put radially between the connector and the press-in portion. The inner ring and the union nut are made of resin, which has a property of contracting in response to change in ambient temperature. The radial contraction rate of the connector is higher by 0.05% or more than that of the press-in portion of the inner ring.

A coupling segment can comprise an arcuate central portion defining a first end, a second end, a first axial side, and a second axial side; a first end portion defining a shank and a bend, the shank extending from the first end of the arcuate central portion proximate the first axial side, the bend extending from the shank towards the second axial side, the bend defining a proximal end coupled to the shank and a distal end distal from the shank, the bend defining an engagement surface and a bottom surface opposite the engagement surface, the bottom surface lying in a plane, wherein the bottom surface faces away from the coupling segment such that the plane does not intersect the coupling segment; and a second end portion extending from the second end of the arcuate central portion, the second end portion defining an opening.

A coupling segment can comprise an arcuate central portion defining a first end, a second end, a first axial side, and a second axial side; a first end portion defining a shank and a bend, the shank extending from the first end of the arcuate central portion proximate the first axial side, the bend extending from the shank towards the second axial side, the bend defining a proximal end coupled to the shank and a distal end distal from the shank, the bend defining an engagement surface and a bottom surface opposite the engagement surface, the bottom surface lying in a plane, wherein the bottom surface faces away from the coupling segment such that the plane does not intersect the coupling segment; and a second end portion extending from the second end of the arcuate central portion, the second end portion defining an opening.

A fluid circuit (160) defining a flow path for a fluid from a fluid supply (152) toward a process stage (156). The fluid circuit may include a plurality of operative components (168) including a body portion (182) and a plurality of tubing connector fittings (186). The operative components may be connected by a plurality of tubing segments (164). Each body portion may include a non-conductive fluoropolymer portion and an outer conductor (234) that extends between each of the plurality of tubing connector fittings and that is unitary with the non-conductive fluoropolymer portion. The plurality of tubing segments may include a non-conductive fluoropolymer tubing portion (187) and an axial strip (188) of conductive polymer. The outer conductor of each body portion conductively connected with tubing segments connected thereto. Each of the connectors may include a bridging component (262) for conductively connecting the respective outer conductor of the body portion to the strip of conductive polymer of the connecting tubing segments.