Patent Document

BACKGROUND  
       [0001]     The present invention pertains generally to the organization and storage of flexible tubes and cables, and more particularly to devices for releasably constraining flexible tubes and cable together in a manner amenable to quick and easy storage and deployment.  
         [0002]     The need to coil or bundle wires, cables, flexible tubes, ropes and hoses exists throughout industry and home life. Devices such as extension cords, cables, air hoses, ropes, and other long, flexible articles (hereinafter referred to generically as “cables”) present a storage problem, where coiled cables often become tangled due to the lack of constraints to keep the cables properly coiled. The traditional storage method is to wrap the cables around a person&#39;s elbow and between the thumb and forefinger.  
         [0003]     Once the cable has been coiled, some means for retaining the strap in the coiled condition may be necessary to prevent the coiled cable from uncoiling or becoming tangled. External devices for retaining the cable in a coiled condition include straps which surround the cable to prevent it from becoming unbundled. Such straps may take the form of wire ties, plastic wire ties, or cable straps having a feature to allow the strap to be closed around a bundle. While each of these devices solve the problem of the cable becoming unbundled to one degree or another, each has the problem that the bundling device is physically separate from the cable being bundled, and accordingly may be lost. When these devices are attached to a cable, the devices may create features which snag on objects if the feature is pulled past such an object. Additionally, separate cable bundling devices may also require two hands for operation, such that releasing a coiled or bundled cable in order to operate the tie could allow the cable to become uncoiled or unbundled.  
         [0004]     Alternately, the end of the coiled or bundled cable could be tied around the coil or bundle to keep the coil or bundle from uncoiling. In order to keep the end in place, a knot would typically be formed in the end of the cable to allow the cable end to be retained around the coiled or bundled cables. Such knots, however, may become difficult to untie, especially if the knot becomes over-tightened.  
       SUMMARY OF THE INVENTION  
       [0005]     The present invention creates an improvement in the management of cables or other long flexible articles, particularly when gathered for storage. The invention contemplates the inclusion of a feature to allow a cable or other long flexible article to be self retaining when wrapped around a cable or bundle formed from the cable or long flexible article.  
         [0006]     The feature may include an element integrated with one or both ends of the cable or other long flexible article, such that when wrapped around a coil or bundle, the end retains itself in the wrapped condition. The feature may utilize a malleable element which allows the end of the cable or other long flexible article to be bent into a wrapped shape, while still allowing a user to unbend the end when the cable is in use. In an alternate embodiment, the feature may utilize a form, such as a helix, which allows the end of the cable or other long flexible article to be wrapped around a bundled or coiled cable or other long flexible article. In a still further variant, the feature may comprise the addition of an element to the outer surface of the cable or other long flexible article allowing one or more successive wraps of the cable or long flexible article to be retained in contact with the previous wrapping.  
         [0007]     The present invention may be embodied in implementations which are fabricated internally to the cable or other long, flexible article, or in configurations which may be added by a user to a previously obtained cable or other long flexible article.  
         [0008]     In one implementation which may be added to a previously owned cable, the feature may be a wrap formed from a web having malleable elements contained therein, such that the web may be wrapped around an end of a cable or other long flexible article to retain the malleable elements in an orientation parallel to a long axis of the cable or other long flexible article.  
         [0009]     Alternately, the feature may be a cover which can be placed around an end of a cable or other long flexible article, or through which a cable or other long flexible article may be inserted. 
     
    
     BRIEF DESCRIPTION OF THE FIGURES  
       [0010]      FIG. 1  illustrates a coiled cable having an integrated cable stay according to the present invention.  
         [0011]      FIG. 2  illustrates a bundled cable having an integrated cable stay according to the present invention.  
         [0012]      FIG. 3  illustrates a cable end in cross section having an internally integrated malleable stay.  
         [0013]      FIG. 4  illustrates a cable end having an internally integrated flexible spinal stay according to the present invention.  
         [0014]      FIG. 4A  illustrates the cable end of  FIG. 4  in lengthwise cross section.  
         [0015]      FIG. 5  illustrates an external malleable stay in wrap form according to the present invention, prior to application of the stay to a cable.  
         [0016]      FIG. 6  illustrates an external malleable stay in wrap form partially installed onto a cable.  
         [0017]      FIG. 7  illustrates a cable cover including two malleable wires inset into the cable cover, with the cable cover installed over a cable.  
         [0018]      FIG. 8  illustrates a malleable wire stay applied on a helical fashion to a cable.  
         [0019]      FIG. 9  illustrates a cable cover form of stay using a clamp to retain the cover adjacent to the end of a cable.  
         [0020]      FIG. 10  illustrates a hook and loop style cable stay according to the present invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0021]     In order to provide a more full understanding of the present invention, a discussion of embodiments of the present invention is provided as follows, in which like reference numbers within the Figures indicate like elements.  
         [0022]     In  FIG. 1 , there is shown a cable  100  that has been coiled  102 , and in which an integrated cable stay  104  has been utilized to retain the cable  100  in the coiled condition. As noted above, the term cable is used herein to refer to any long, flexible article which a user may desire to coil or bundle, and may include, but is not limited to ropes, strings, twine, electrical cords, cables, wires, and flexible tubes and hoses.  
         [0023]     The coiled cable may include several bights  100   a ,  100   b , . . . which have been coiled, such as by having been wound between a user&#39;s hand and elbow. A first end  106  of the cable may then be wound around the coiled cable  108  to prevent the coiled cable  108  from becoming uncoiled. In order to prevent the windings  110  from unwinding from around the coiled cable  108 , the first end  106  may include a cable stay  104 , such as a malleable element extending along a length of the cable  100  adjacent the first end  106  of the cable  100 , such that when the first end  106  is wound around the cable  100 , the malleable material is formed to remain in the wound condition, while also allowing the first cable end  106  to be straightened when the first cable end  106  is not wound around a bundled or coiled cable.  
         [0024]     In  FIG. 2 , an alternate embodiment of an integrated stay is shown, using a resilient helical stay  202  to maintain the first cable end around a bundled section of cable  204 . The term resilient is used herein to identify that the helical stay should not preferably be rigid, but rather allow some flexing to ease the winding of the helical stay portion around one or more bights of a bundled or coiled cable. The resilient helical stay  202  forms a spiral  206  around the bundled cable  204 , such that the cable  100  does not readily become unbundled. The helical stay  202  may be applied around the bundled cable  204  by wrapping the helical stay portion around the bundled portion of cable  100 .  
         [0025]     Although the illustrations show a coiled cable being held by a malleable stay and a bundled cable held by a helical stay, either stay form may be used with either gathered, coiled or bundled cable, and no limitations are intended by the use of the particular types of stay in conjunction with coiled or bundled cables.  
         [0026]     In  FIG. 3 , a cable having an internally integrated malleable stay  302  is shown in cross section. The use of the malleable stay  302  allows the cable  100  to be in a straight position when unwrapped. As shown in  FIG. 3 , an internally integrated malleable stay  302  may be formed by placing a malleable strip  304  or wire, such as formed by a soft piece of metal (hereinafter referred to collectively as a “strip”  308 ), within the outer sheath  306  of the cable  100 . The strip  308  may be coated, such as with an insulative material, to limit the potential for the strip  308  becoming a conductor within the cable  100 . The outer sheath  306  may be used to contain one or more conductive elements  310  or load bearing elements. The strip  308  may have a length selected to allow a desired amount of self-retaining wraps around a coiled or bundled cable to be achieved. The cable may utilize a malleable strip  308  at one end only, or may utilize malleable strips at both ends.  
         [0027]     One potential issue regarding the use of a stay in a wrapped section of coil relates to the deformation of the cable when bent. When a cable is bent into a circular path, such as when wound around a coiled or bundled portion of the cable, the outer boundary of the wound portion of cable may typically be at a larger radius than an inner boundary. The difference between the inner radius and the outer radius creates a difference in the lengths of the outer boundary and the inner boundary along the circular path. This difference in the lengths may create relative motion between components which comprise the cable, such as may occur if an outer edge of an outer sheath is stretched relative to a core of the cable. If the components of the cable are joined, i.e., not allowed to move relative to each other, high stresses may develop in one or more of the components, such that stress or plastic deformation related failures may become a concern.  
         [0028]     In order to accommodate such relative motion, the components of the cable  100  may be integrated such that the individual components can slide relative to each other. In the case of an integrated malleable stay  302 , the strip  308  may be enclosed within a tube structure (not shown) to protect wires or other conductive elements within the outer sheath  306  from abrasion damage from relative motion. The strip  308  itself may be slidable relative to the flexible tube structure and provided with radiused edges to limit the potential for the strip binding in the tube as a result of differential motion between the strip and the tube.  
         [0029]     As shown in  FIG. 4 , the stay of the present invention may alternately be formed by integrating a resilient helical form along an end of a cable. The helical form may hold the cable end in a helical shape, such that the end of the cable may be wrapped around a coiled or bundled cable, with the helical shape inducing the end of the cable to be retained around the coil or bundle.  
         [0030]     As shown in  FIG. 4A , the resilient helical form  402  may be built into one end of a cable  100 , such that conductive elements  404  and an outer sheath  406  may be formed around the resilient helical form  402 . The helical form  402  may use a non-circular cross section to bias the flexibility of the stay in a preferred direction, as well as to provide pockets  408  within the outer sheath for conductive elements, thus allowing the outer sheath  406  to retain a generally circular cross section.  
         [0031]     Although the implementations shown in  FIGS. 3 and 4  show the stay being internal to the cable, external stays may be utilized to allow stays to be added to cables that a user already has. As shown in  FIG. 5 , an external malleable stay  502  in a wrap form may be formed from a web  504  having one or more malleable strips  506  bonded to a flexible sheet  508 , embedded within a flexible sheet  508 , or placed between flexible sheets. As shown in  FIG. 5 , a plurality of strips  506  may be placed between an inner  510  and an outer  512  flexible sheet. The flexible sheets may be formed from a plastic material having sufficient flexibility to allow deformation of the plastic sheets as the stay is wrapped around an end of a portion of a cable, or as the end of a cable to which the stay has been attached is wound around a coiled or bundled portion of the cable. A pressure sensitive adhesive strip  514  may be applied to one end of the wrap style stay to allow the wrap style stay to be joined or bonded to itself around a cable, around a portion of the cable, or a combination of both dependant upon the width of the wrap style stay relative to the circumference of the cable around which the wrap style stay is being wrapped.  
         [0032]     Alternately, the adhesive  514  may be provided with a release strip (not shown) which exposes the adhesive only after the release strip has been removed from the wrap style stay. Defining the length  516  of the stay to be along the axis  518  along which the malleable strips  506  extend, and the normal to this to be the width  520 , it can be seen that wrap-style stays of a considerably greater width than needed to provide a stay for a single cord may be formed. Such a stay having a width greater than needed may be provided with features allowing a portion of the wrap style stay to be readily separated from the remaining portion of the wrap style stay to allow a user to form a wrap style stay having an appropriate width. This may be accomplished by proving the wrap style stay with periodic lines of perforation  522  parallel to the malleable strips, such that a user can easily tear along the line of perforations to form the wrap style stay of an appropriate width. Alternately, a wrap style stay of greater width than needed may be packaged such that the packaging provides a convenient means for cutting the wrap style stay to an appropriate width, such as by packaging the wrap style stay in roll form within a box, wherein the box has an opening through which the wrap style stay may be withdrawn, the opening further having an edge provided with a cutter which allows the wrap style stay to be pulled against the cutter to form a wrap style stay of an appropriate width.  
         [0033]     As shown in  FIG. 6 , a section of the flexible wrap style stay  602  having an appropriate length  604  and width  606  may be wrapped around a section of cable  100  to form a stay  608  at the portion of cable  100  around which the wrap style stay  602  has been wrapped. The use of a single strip of adhesive  610  allows the remaining length of the wrap style stay  602  to slide relative to the underlying cable  100 , such that winding the portion of the cable  100  to which the wrap style stay has been applied around a coil or bundle will not create adverse stresses between the wrap style stay  602  and the cable  100 .  
         [0034]     Although the wrap style stay  602  is shown using a pre-applied line of adhesive, other methods of joining or bonding the wrap style stay to the cable  100  may be incorporated. For example, the wrap style stay  602  may use an external clamp to retain the wrap style stay  602  around the cable, such as a piece of tape, wire wrap, or other fastener. Alternately, the stay may be retained by an adhesive strip along one edge of the sheet stay which is parallel to the cable length.  
         [0035]     As shown in  FIG. 7 , a stay  702  using malleable strips  704  may alternately be formed as a cable cover  706 . As shown, a cable cover body  708  may be formed from a flexible material. The cable cover body  708  may be provided with one or more malleable elements  710  to allow the stay  702  to be retained in position once an end of a cable has been wound around a coil or bundle. The stay body  708  may additionally be provided with a longitudinal slit  712  allowing a cable  100  to be passed into a cavity running the length of the cable cover  706 .  
         [0036]     The effectiveness of a cable cover  706  stay may be dependant upon the outer diameter of the cable  100  being slightly larger that the inner diameter of the stay body when no clamp is provided to limit motion of the cable cover relative to the cables. If the cable has a slightly larger outer diameter  714  then the inner diameter  716  of the stay body  708 , the inner diameter  716  may be allowed to expand as required by forming a gap  720  along the slit  712 , thus retaining the stay body  708  around the cable  100 , without requiring tight tolerances with respect to the outer diameter  714  of the cable versus the inner diameter  716  of the stay body  708 .  
         [0037]     As shown in  FIG. 8 , a simple form of a stay  800  according to the present invention may be created by wrapping a malleable element  802  around an end of a cable  100 , such that the stay provides the necessary stiffness to allow a cable end wrapped around a coil or bundle to be held in the wrapped position. The stay  800  may use a middle portion  804  from which the spinal windings are formed, as well as first  806  and second  808  ends which may be wound close together to fix the position of the stay  800  relative to the cable  100 . A plurality of windings of the stay  800  may be used adjacent to the ends of the stay, to assist in retention of the stay ends adjacent to the positions on the cable  100  at which the ends are desired to remain fixed. The use of spiral windings  810  along the length of the portion of the cable  100  to which the stay has been applied allows the windings to adjust as necessary as the cable bends to form any wrappings. The spiral malleable stay may additionally be overwrapped with a flexible material (not shown), such as electrical tape, to retain the spiral malleable stay in its position.  
         [0038]     As shown in  FIG. 9 , a stay  902  may be formed as a cover  904  without a slit into an inner cavity, using multiple malleable wires  906  to provide the position retention capability. A clamp  908  formed from a piece of tape, cable tie, or other structure may be included to prevent the cover  904  from sliding relative to the cable  100  around which the cover has been placed.  
         [0039]     As shown in  FIG. 10 , a stay  1002  may alternately be formed using a hook and pile type fastening system commonly called by its trademark “Velcro”, such that successive windings of the cable may be joined to each other to prevent the windings from unwinding when wound around a cable bundle or coil. The stay  1002  may have a first end  1004  and a second end  1006  and a midpoint  1008  between the first  1004  and second  1006  ends. A surface  1010  may be formed between the first endpoint and the midpoint having one half of a hook and pile fastener, with a second surface  1012  formed between the midpoint  1008  and a second end  1006  having the mating half of the fastener. The stay  1002  may be formed by placing alternating sections of hook and pile material onto two backings, and then joining the backings on opposite sides of the cable  100 , such as by sewing the backings together, or adhering the backings together. Preferable, the backing pieces may be joined together tightly enough that the assembled stay  1002  does not readily slip relative to the cable  100 . Alternately, a clamp such as a piece of tape wrapped around the cover or a wire tie may be used to create a sufficient interference between the cover and the cable to prevent the cover from readily sliding relative to the cable. The formation of the hook and pile fasteners into a cover running parallel to the long axis of the cable provides the benefit that the cover is less likely to become entangled when attached to the cable than a retainer, such as an attached strap extending outwardly from the cable would do.  
         [0040]     The present invention may be embodied in other specific forms than the embodiments described above without departing from the spirit or essential attributes of the invention. Accordingly, reference should be made to the appended claims, rather than the foregoing specification, as indicating the scope of the invention.

Technology Category: 4