Cable restrain device with dual-material double wedge chuck

A cable fitting, comprising:

• a gland nut including first threads, an axial gland bore, and a first sloped surface along a portion of the axial gland bore;
• a body including second threads configured to receive the first threads, an axial body bore, and a second sloped surface along a portion of the axial body bore;
• and
• a chuck including:
• multiple segments together in a shape of a ring, wherein each of the multiple segments includes a distal end tapered surface and a proximal end tapered surface, and
• a flexible band to hold the multiple segments in the ring shape, wherein the flexible band comprises a thermoplastic elastomer (TPE) molded over each of the multiple segments, and wherein each of the multiple segments includes a groove, oriented parallel to and facing away from a central axis, into which a portion of the flexible band is molded;
• wherein the gland nut, the body, and the chuck are configured to form an axial pathway for receiving a cable,
• wherein, when the first threads of the gland nut are advanced onto the second threads of the body, the first sloped surface is configured to apply a first compressive force to the distal end tapered surfaces, and the second sloped surface is configured to apply a second compressive force to the proximal end tapered surfaces, and
• wherein the first and second compressive forces cause inward deformation of the chuck to secure the cable within the axial pathway.

A chuck for a cable fitting, comprising:

• multiple segments, of a nylon-based material, substantially forming a ring shape, each segment of the multiple segments including:
• a first tapered surface on a distal end, wherein the first tapered surface slopes in a first direction and
• a second tapered surface on a proximal end, wherein the second tapered surface slopes in a second direction;
• and
• a flexible band to hold the multiple segments in the ring shape,
• wherein the flexible band comprises a thermoplastic elastomer (TPE) molded over each of the multiple segments, and wherein each of the multiple segments includes a groove, oriented parallel to and facing away from a central axis, into which a portion of the flexible band is molded,
• wherein each segment of the multiple segments is configured to receive compressive forces on both the first tapered surface and the second tapered surface to force each segment of the multiple segments inwardly toward the central axis,
• and wherein the multiple segments are configured to engage a cable.