Abstract: A pipe plug is disclosed which includes a disc-like screw plate, an elastic sealing ring, a horn-like pressure block, and a lifting eye. The screw plate receives the bottom edge of the sealing ring and the horn-like pressure block is mounted on the upper edge. The screw plate has a central rod that extends upwardly through a hole in the pressure block. The lifting eye is then threadedly received on the end of the rod and as the lifting eye is turned, the block and plate will be urged together causing the sealing ring to expand against the internal wall of a pipe.

Abstract: The plug is disposable around a fiber optic cable in an innerduct to form the present assembly. The plug releasably seals the cable and innerduct against ingress of mud, dirt, water, grit and other foreign substances. The plug includes upper and lower rigid compression plates positioned, respectively, immediately above and below a flexible, resilient tubular gasket having an upper circular flange. The lower compression plate has two or more spaced vertical curved arms disposed in a circle around a central vertical cable-receiving passageway and extending up from the plate through slots in the gasket and upper compression plate. The arms are threaded externally and hae an internally threaded collar screwed down thereover. The collar, upper plate and flange seat over theopen end of an innerduct bearing the cable. the lower compression plate and gasket (except for the flange) are in the innerduct. The gasket, upper and lower compression plates and collar have aligned cable-receiving vertical passageways.

Abstract: A cable holder for use in supporting a single cable within a conduit is formed of a strong, lightweight, arc-shaped element having a substantially planar front surface, a rear surface broken by a cavity extending substantially the thickness of the arc-shaped element, an arcuate concave upper surface and an arcuate convex bottom surface. Both arcuate surfaces constitute approximately 120 degree arcs of circles. A stud is provided on the planar front surface. A rib positioned within the cavity provides support for the front surface at the point where the stud is located.