Page 68 - Wire Rope News & Sling Technology - February 2020
P. 68

INVENTOR’S CORNER
         continued from previous page
         level of the cylindrical section 8 is pressed into the thread
         10, which acts as set of interlocking teeth, and at the level
         of the inner strands 5 is pressed into the outer contours of
         the inner strands 5 to form a positive connection. To produce
         an additional connection between the sleeve 3 and the outer
         strands 6, the outer strands 6 can also be welded to the edge
         of the sleeve 3 at which the bevel 11 is provided. Figure 16
         shows such a weld 12.
         Jacketed wire rope
         Pat. 10,501,887 U.S. class 1/1 Int. class D07B 1/06
         Inventor: Bonita Carter, Victoria, CA.
         Assignee: Bonita Carter, Victoria, CA.
           A wire rope has a lubricated core, an inner jacket in con-
         tact with the core, and outer strands wrapped around the   Figure 18: Cross-section view of an embodiment of a wire rope before
         inner jacket. An outer jacket surrounds the outer strands   the outer jacket and outer strands have been applied.
         and contacts the inner jacket to form an integrated jacket.   meant that the outer jacket material at least is in physical
         A method of forming an integrated jacket for a wire rope in   contact with the inner jacket 14 and may enter into (impreg-
         which an inner jacket is cold applied and an outer jacket is   nate) the open pores 19 of the inner jacket material to help
         applied by application of molten material to the inner jacket.  form a bond between the inner jacket 14 and the outer jacket
           As shown in figures 17 and 18, an embodiment of a wire   16. The outer jacket 16 may penetrate the open pores 19 of
         rope 10 has a lubricated core 12, which may be for example   the inner jacket to a greater extent than the inner jacket
         an independent wire rope core, a strand core, a fiber core   penetrates the indented profile of the core 12. This relative
         or a plastic core. The lubricated core 12 has an indented   penetration of the outer jacket 16 into the inner jacket 14
         profile including indentation between strands of the core   compared with the penetration of the inner jacket 14 into
         and between wires forming the strands. An inner jacket 14   the core 12 may be facilitated by the relative melting tem-
         contacts the core 12 and completely surrounds the core 12.   peratures of the outer jacket 16 and inner jacket 14.
         A plurality of outer strands 18 is wrapped around the in-  The material forming the plastic outer jacket 16 may ex-
         ner jacket 14. A plastic outer jacket 16 at least partly sur-  tend a varying degree into the inner jacket 14, from filling
         rounds the outer strands 18 and contacts the inner jacket   some of the pores of the inner jacket 14 to filling all of the
         14 to separate the outer strands from each other. The inner   pores 19 of the inner jacket 14 (as illustrated in figure 17).
         jacket 14 may have a higher melting point than the outer   In some embodiments, the plastic of the outer jacket  16
         jacket 16. In some embodiments, the inner jacket 14 may   may extend inwardly through the inner jacket 14 into the
         have the same melting point as or a lower melting point   core 12. The combined inner jacket 14 and outer jacket 16
         than the outer jacket  16. The outer jacket  16  may  suffi-  together form a single integrated jacket for the wire rope.
         ciently cover the outer strands 18 to prevent metal to metal   Figure  19  shows  a  cross-section  of  part  of  an  integrated
         contact between the outer strands that would cause prema-  jacket in which the outer jacket 16 has filled the pores 19
         ture wear on the outer strands 18 and to prevent migration   of the inner jacket 14.
         of debris between the outer strands that might deteriorate   The inner jacket 14 may be compressible and compressed
         the function of the wire rope.                       by the laying of the outer strands 18 on the inner jacket 14.
           In an embodiment, the inner jacket 14 comprises a porous   The outer strands 18 may be compressed against the inner
         and permeable material with open pores 19 on the outward   jacket 14. Figure 18 shows the inner jacket 14 surrounding
         facing surface of the inner jacket 14. The outer jacket 16 con-  the core 12 before compression. The compression of the out-
         tacts the pores 19 of the inner jacket 14, as shown in figure   er strands 18 may result in the inner jacket 14 being com-
         19 and binds to material of the inner jacket 14 that defines   pressed or crushed into a new shape and forced into voids
         the pores 19 of the inner jacket 14. Figure 19 is representa-  and gaps within the wire rope. The voids and gaps may for
         tional. The pores 19 may all be connected. By contacting it is   example be gaps between each of the outer strands 18, be-
                                                              tween the outer strands 18 and the core 12, and between
                                                              strands and wires of the core 12. The compression of the in-
                                                              ner jacket 14 into gaps of the wire rope may prevent strand
                                                              to strand or core to strand contact.
                                                               The outer jacket 16 may be impregnated or injected on to
                                                              the surface of and into the inner jacket 14 surrounding the
                                                              core 12 and into the outer strands 18 as a molten material
                                                              that passes through the outer strands 18 to the inner jack-
                                                              et 14. The molten material may be applied to the surface
                                                              of the inner jacket 14 surrounding the core 12 and outer
                                                              strands 18 before or simultaneously with closing the outer
                                                              strands 18 around the inner jacket 14. The outer strands
                                                              18 may be wrapped around the outer jacket 16 and com-
                                                              pressed against the inner jacket 14, forcing the material of
                                                              outer jacket 16 to spread in between the outer strands 18
                                                              and into the inner jacket 14.
                                                               The inner jacket  14 may for example be made of met-
         Figure 17: Cross-section view of an embodiment of a wire rope.  al or plastic. A plastic inner jacket 14 may be made from

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