The present invention relates to a pre-terminated (pre-terminated) optical fibre cable assembly (10,90), which is configured to be installed through a duct (20). The pre-terminated optical fibre construction (10,90) includes at least one optical fibre (46). A protective sleeve (26) is added to the optical fibre (46) before adding a terminal connector (24) to the leading end of at least one optical fibre (46). The protective sleeve (26) extends from behind the terminal connector (24) along part of the length of the optical fibre (46). When the cable is installed through a duct, the protective sleeve protects the portion of the fibre that protrudes from the end of the duct, for example in a communications cabinet (16). A residual length (28) of the protective sleeve remains within the duct. Terminal connectors and protective sleeves can be applied at both ends of the cable assembly, or only one end.

Before pulling a leading end of a fiber optic cable through a duct in order to splice the cable fibers to other fibers located at a far end of the duct, the outer jacket of the cable and elements surrounding the cable fibers are removed to expose the fibers. The exposed fibers are prepared by (a) removing coatings on the fibers, (b) cleaving the ends of the fibers, and (c) placing the cleaved fibers into one or more protective covers. A cable grip or sock is dimensioned and formed to envelop the leading end of the cable including the protective covers, up to and including the outer jacket. The grip together with the cable are pulled through the duct, and the grip and the protective covers are removed at the far end of the duct to expose the cleaved fibers for splicing to the other fibers at the far end.

A dust cap includes a cap body and a pair of opposing latches. The cap body is adapted to cover a connectorized end of a fiber optic connector and cable assembly when the connectorized end is inserted through an opening of an interior of the cap body. The cap body further includes an opposing pair of resilient walls. The pair of opposing latches each include latching features that extend outside of the interior of the cap body. The pair of opposing latches each further include a mounting portion mounted to a respective one of the opposing pair of resilient walls. The dust cap may further include a pulling interface. The pulling interface may be adapted to attach to a pulling member and may be positioned at a tapered nose of the cap body. The dust cap may thereby be a cable pulling cap and may pull a fiber optic connector and cable assembly through conduits and other narrow passages. A pair of opposing pulling halves may enclose the cable pulling cap or the dust cap without a pulling interface and at least a portion of the connectorized end of the fiber optic connector and cable assembly.

A optical fiber connecting device includes a hollow main body and a dust-proof sleeve. The hollow main body includes a first hollow inserting portion, a second hollow inserting portion oppositely of the first hollow inserting portion, and a flange between the first and second hollow inserting portions. The second hollow inserting portion has an engaging recess. The dust-proof sleeve is removably sleeved around the second hollow inserting portion. The dust-proof sleeve has an inner sleeve surface and a C-shaped rib that projects inwardly from the inner sleeve surface to releasably engage the engaging recess.

The present disclosure relates to a splice-on connector configuration having connector body defining a forward fiber buckling region and a rearward splice encapsulation region. The splice encapsulation region can be filled with curable adhesive. The splice encapsulation region can also function to anchor a fiber optic cable.

A protective caddy for the installation of an optical fiber cable in optical fiber ducting which temporarily protects a duplex optical fiber cable assembly for an optical fiber duplex connector during insertion of the assembly into a length of ducting. The duplex optical fiber cable assembly comprises a duplex optical fiber cable and a pair of optical fiber connector sub-assemblies. The protective caddy comprises a pair of receptacles, each for receiving one of the optical fiber connector sub-assemblies. Each receptacle has a recess for protectively receiving the termination end of one of the optical fiber ferrules. In use, both the duplex optical fiber cable and the pair of optical fiber connector sub-assemblies are held to the elongate body so that the termination ends are protected by the recesses during insertion of the protective caddy and duplex optical fiber cable assembly into the length of ducting.

A method of conveying a fiber optic cable through a conduit having an inside diameter involves connecting an interior pig assembly to a far end of the fiber optic cable, the interior pig assembly having an outside diameter smaller than the conduit inside diameter, and inserting the interior pig assembly into the conduit. To convey the fiber optic cable through the conduit, the interior pig assembly may be magnetic, and an exterior assembly including a magnet outside the conduit may be used to pull the interior pig assembly pig through the conduit. In addition or alternatively, a gas may be injected into the conduit to push the pig assembly through the conduit.

A ferrule assembly comprises a ferrule mounted in an opening of a ferrule back body. The ferrule assembly is mounted at an end of an optical fibre extending through the ferrule along an axial direction. The ferrule assembly is passed through a tubular section and then through a biasing member. The back body is then inserted into an opening of a back body holder and attached to the back body holder. The back body holder prevents the ferrule assembly from passing back through the biasing member. The insertion comprises moving the ferrule assembly relative to the back body holder in the axial direction. During the relative movement, an orientation of the back body relative to the back body holder, determined by a guide element of the back body, is maintained. The tubular section may for example be a duct as narrow as 3 mm.

A optical fiber connecting device includes a hollow main body and a dust-proof unit. The hollow main body includes a first hollow inserting portion for insertion of a fiber optic connector, a second hollow inserting portion oppositely of the first hollow inserting portion, and a flange between the first and second hollow inserting portions. The second hollow inserting portion has a threaded outer surface. The dust-proof unit includes a dust-proof sleeve that has a threaded inner surface. The dust-proof sleeve is removably sleeved around the second hollow inserting portion by an inter-engagement of the threaded inner and outer surfaces.

A optical fiber connecting device includes a hollow main body and a dust-proof sleeve. The hollow main body includes a first hollow inserting portion, a second hollow inserting portion oppositely of the first hollow inserting portion, and a flange between the first and second hollow inserting portions. The second hollow inserting portion has an engaging recess. The dust-proof sleeve is removably sleeved around the second hollow inserting portion. The dust-proof sleeve has an inner sleeve surface and a C-shaped rib that projects inwardly from the inner sleeve surface to releasably engage the engaging recess.