Page 63 - Wire Rope News & Sling Technology - April 2019
P. 63

INVENTOR’S CORNER
                                                              sectional size and/or that mates with the cross section size
                                                              and/or shape of at least a portion of the outer aperture 136 of
                                                              the outer conduit 116. Additionally, the inner side 144 of the
                                                              second wall 142 of the inner conduit 118 generally defines
                                                              an inner aperture 154 of the inner conduit 118 that is sized
                                                              to receive slideable displacement of at least a portion of the
                                                              core wire 120. Further, when inserted into the outer aper-
         Figure 14:  Partial cross sectional view of the  portion of the  cable
         system.                                              ture 136, the second central axis 152 of the inner conduit
                                                              118 may generally align with at least the central axis 138 of
         portion of the outer conduit 116. Further, according to some   the outer aperture 136.
         embodiments, the outer aperture 136 may extend along a   A variety of different types of cables, wires, cords, strands,
         central axis 138 that is arranged generally parallel with, if   chain, lines, or ropes, among other devices or materials, hav-
         not co-axial with, a first central longitudinal axis 140 of the   ing a length along a longitudinal axis 156 of the core wire 120
         outer conduit 116.                                   that is substantially longer than a corresponding width in a
           The first wall 126 of the outer conduit 116, and more par-  direction that is generally perpendicular to the longitudinal
         ticularly, the outer and inner surfaces 128, 130 of the first   axis 156, may be utilized for the core wire 120. Further, the
         wall 126, may have a variety of shapes and configurations,   core wire 120 may be constructed from a variety of different
         including, for example, having a cross sectional shape that   materials, including, but not limited to, a braided or non-
         is round, non-round, oval, square, rectangular, triangle, or   braided  steel, metal, and non-metallic cable(s) or wire(s).
         trapezoidal, among other suitable shapes. Additionally, the   Further, according to some embodiments, the core wire 120
         shape of the outer surface 128 may be similar to the shape   may be coated, at least along an outer surface 158 of the
         of the inner surface 130, or can be similar in shape in only   core wire 120, with a vinyl material, among other coatings
         some areas. Further, the outer conduit  116 may  be con-  or materials. The core wire 120 may be sized to extend from
                                                              a first end to a second end along the longitudinal axis 158 of
                                                              the core wire 120. Additionally, at least a portion of the core
                                                              wire 120 has a width that can accommodate placement of
                                                              the core wire 120 in at least a portion of the inner aperture
                                                              154 of the inner conduit 118.
                                                               The  conduit  locking  device  122  is  adapted to  selectively
                                                              lock the relative positions of the outer and inner conduits
                                                              116, 118. For example, once the relative axial positions of
         Figure 15: Side cross sectional view of a portion of an inner conduit
         positioned within a portion of an outer aperture of an outer conduit   the outer and inner conduits 116, 118 are selected, the con-
         of the adjustable length cable.                      duit locking device 122 is adapted to provide one or more
                                                              forces that at least attempt to prevent subsequent axial dis-
         structed from a variety of materials, including, for example,   placement of the inner conduit 118 relative to the outer con-
         materials that may accommodate a restriction of a size of   duit 116, or vice versa. A variety of different types of fittings
         at least a portion of the outer aperture 136 when at least a   may be employed for the conduit locking device 122, includ-
         corresponding portion of the first wall 126 is subjected to a   ing, for example, fittings that may provide a clamping force
         clamping or radial compressive force by one or more fittings,   for one or both of the outer and inner conduits 116, 118.
         and/or a material that can accommodate an expansion of the   The exemplary conduit locking device  122 depicted in
         outer aperture 136 to accommodate the placement of one or   figure  16  includes  mating  first  and  second  locking  seg-
         more press fittings in the outer aperture 136.       ments  164,  166,  with  both  the  first  and  second  locking
           Similar to the outer conduit  116, the inner conduit  118   segments  164,  166 having inner walls  168a,  168b that
         includes a second wall 142 having an inner side 144 and an   generally define orifices 170a, 170b that extend through
         outer side 146, and which extends from a first end 148 to a   the first and second locking segments 164, 166 and which
         second end 150 along a second central axis 152. Addition-  are sized to at least accommodate passage of at least the
         ally, the outer side 146 of the second wall 142 of the inner   inner conduit 118 through the conduit locking device 122.
         conduit 118 can be configured to be received in the outer ap-  The exemplary first locking segment 164 depicted in fig-
         erture 136 of the outer conduit 116 such that an axial posi-  ure 16 includes opposite first and second extensions 172a,
         tion of the inner conduit 118 is adjustable relative to at least   172b that are separated from one another by a shoulder
         an axial position of the outer conduit 116. Thus, according to   section  174. According to the depicted embodiment, the
         some embodiments, at least a portion of the outer side 146   first extension 172a is sized relative to the outer aperture
         of the second wall 142 of the inner conduit 118 has a cross   136 of the outer conduit 116, or vice versa, such that at
                                                              least a portion of the first extension 172a may be retained
                                                              in the outer aperture 136 via a press, interference, and/
                                                              or  friction  fit  between  the  first  extension  172a  and  the
                                                              adjacent first wall 126 of the outer conduit 116. According
                                                              to the illustrated embodiment, an outer portion 176 of the
                                                              first extension 172a may include one or more barbs 178
                                                              that can be structured to facilitate placement of the first
                                                              extension 172a into the outer aperture 136, as well as as-
                                                              sist in the formation of the press, interference, and/or fric-
                                                              tion fit and/or otherwise assist in the retention of the en-
                                                              gagement between the first extension 172a and the inner
         Figure 16: Side cross sectional view of an exemplary conduit locking
         device coupled to both a first end of an outer conduit and a portion   surface 130 of the first wall 126 of the outer conduit 116.
         of an inner conduit.                                       Inventors Corner continues with more patents on next page
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