Patent Publication Number: US-2010108964-A1

Title: Tensioning tool and method for using same

Description:
This application is a continuation of U.S. application Ser. No. 12/062,633, filed Apr. 8, 2008, now U.S. Pat. No. 7,641,176, which is a continuation of U.S. application Ser. No. 11/619,886, filed Jan. 4, 2007, now U.S. Pat. No. 7,398,956, which claims priority to U.S. Provisional Application No. 60/756,262, filed Jan. 4, 2006. 
    
    
     TECHNICAL FIELD AND BACKGROUND OF THE INVENTION  
     The invention relates to a tool that can separate and exert pressure on string-like material, such as strings, fibers, ropes, etc. One embodiment of the invention is particularly useful in forming rope loops on archery bow strings. 
     Rope loops, also known as string loops, bow loops and/or D-loops, are a common feature on archery bow strings, as they provide several benefits to the archer. Such benefits include the prevention of premature wear on the serving, and the elimination of “nook pinch” when at full draw, which prevents the arrow from falling off the bow string at full draw. The rope loops are typically attached to the bow string via a pair of cinch knots. 
     While rope loops are popular in archery, forming the rope loop on the bow string with the necessary amount of tension in the cinch knots of the loop without damaging the bow string serving and/or the loop can be difficult. Tapered needle nose pliers and/or screw drivers have been used to pull hard on the rope to tighten the cinch knots. However, such a method has a risk of damaging the bow string. 
     SUMMARY OF THE INVENTION 
     Therefore, it is an object of the present invention to provide a tool that can be used in tensioning the cinch knots of a rope loop on a bow string. 
     It is another object of the present invention to provide a tool that can aid in the formation of a rope loop on a bow string while minimizing damage to the bow string or rope loop. 
     These and other objects of the invention can be achieved in the preferred embodiments disclosed below by providing a tensioning tool for applying tension to string-like material that includes a first member having a first handle section and a first engaging section opposite the handle section facing a first direction for receiving and engaging a first strand section, and a second member pivotally connected to the first member and having a second handle section and a second engaging section opposite the second handle section. The second engaging section faces a second direction opposite the first direction for receiving and engaging a second strand section, and moving the handle sections of the first and second members towards each other urges the engaging sections of the first and second members apart. 
     According to another preferred embodiment of the invention, the first engaging section is adapted to receive the first strand section, which is connected to the second strand section, and moving the first and second handle sections of the respective first and second members toward each other urges the engaging sections of the first and second members apart, thereby tensioning the first strand section. 
     According to another preferred embodiment of the invention, the first engaging section includes a recess facing the first direction for receiving and engaging the first strand section, and the second engaging section includes a plurality of recesses facing the second direction opposite the first direction for receiving and engaging the second strand section. 
     According to another preferred embodiment of the invention, the first and second members are joined by a pivot member extending through the first and second members. 
     According to another preferred embodiment of the invention, the first and second handle sections are arcuate. 
     According to another preferred embodiment of the invention, the recesses are substantially circular. 
     According to another preferred embodiment of the invention, a tool for use in forming a rope loop on a bow string includes a first member having a first handle section and a first engaging section opposite the first handle section with a first member prong having a recess facing a first direction for receiving and engaging a rope section, and a second member pivotally connected to the first member and having a handle section and an engaging section opposite the handle section having three second member prongs each having a respective recess facing a second direction opposite the first direction for receiving and engaging a bow string, wherein moving the first and second handle sections toward each other urges the first member prong away from the second member prongs. 
     According to another preferred embodiment of the invention, the three second member prongs are left, middle and right prongs, and the first member prong is aligned with the middle prong of the second member. 
     According to another preferred embodiment of the invention, the left and middle second member prongs define a first area for positioning a first cinch knot of the rope section on the bow string, and right and middle second member prongs define a second area for positioning a second cinch knot of the rope section on the bow string. 
     According to another preferred embodiment of the invention, moving the first and second handle sections of the respective first and second members toward each other tightens the first and second cinch knots. 
     According to another preferred embodiment of the invention, the recess in the first member prong and the recesses in the second member prongs are substantially circular. 
     According to another preferred embodiment of the invention, the first member prong and the second member prongs each include a rounded edge located at a longitudinal end. 
     According to another preferred embodiment of the invention, a method of forming a rope loop on a bow string includes providing a tool having a first member with a first handle section and a first prong opposite the first handle section with a recess facing a first direction for receiving and engaging a rope. A second member is pivotally connected to the first member and has a second handle section and second, third and fourth prongs that each have a recess facing a second direction opposite the first direction for receiving and engaging a bow string. The second and third prongs define a first area therebetween and the third and fourth prongs define a second area therebetween. A first end of the rope is tied in a first cinch knot at a desired location on the bow string, and the bow string is positioned in the recesses of the second, third and fourth prongs such that the first cinch knot is positioned in the first area defined by the second and third prongs. The rope is positioned in the recess of the first prong, and a second end of the rope is tied in a second cinch knot on the bow string in the second area defined by the third and fourth prongs. The first and second handle sections are moved toward each other thereby moving the first prong away from the second, third and fourth prongs so that the rope is tensioned and the first and second cinch knots are tightened. 
     According to another preferred embodiment of the invention, the method of forming a rope loop on a bow string includes the step of cutting an excess length of rope from the second cinch knot. 
     According to another preferred embodiment of the invention, the second cinch knot is heated, and pressure is applied. 
     According to another preferred embodiment of the invention, the first and second handle sections are moved away from each other in order to release the rope from the first prong and the bow string from the second, third and fourth prongs. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Some of the objects of the invention have been set forth above. Other objects and advantages of the invention will appear as the invention proceeds when taken in conjunction with the following drawings, in which: 
         FIG. 1  is a perspective view of a loop set tensioning tool according to a preferred embodiment of the invention; 
         FIG. 2  is a front elevation of the tensioning tool of  FIG. 1 , illustrating a method of using the tensioning tool according to a preferred embodiment of the invention, showing the tool in a non-tensioning position; 
         FIG. 2A  is another front elevation of the tensioning tool of  FIG. 1 , illustrating a method of using the tensioning tool according to a preferred embodiment of the invention, showing the tool in a tensioning position; 
         FIG. 3  is another perspective view of the tensioning tool of  FIG. 1 ; 
         FIG. 4  is a top plan view of the tensioning tool of  FIG. 1 ; 
         FIG. 5  is another top plan view of the tensioning tool of  FIG. 1 ; and 
         FIG. 6  is an environmental view illustrating a method of using the tensioning tool of  FIG. 1  according to a preferred embodiment of the invention. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS AND BEST MODE  
     Referring now specifically to the drawings, a loop set tensioning tool according to a preferred embodiment of the invention is illustrated in  FIG. 1 , and shown generally at reference numeral  10 . The loop set tensioning tool  10  includes first and second members  11 ,  21  pivotally joined at a pivot point  30 . The first and second members  11 ,  21  each include an arcuate handle section  12 ,  22 , respectively. The first member  11  has an engaging section such as an upper prong  14  having a recess  14 A facing outwardly from the interior of the tool  10 . The second member  21  has an engaging section comprised of three lower prongs  23 ,  24 ,  25  having recesses  23 A,  24 A,  25 A, respectively, facing the opposite direction of recess  14 A of the upper prong  14 . Alternatively, the second member  21  can have fewer or more than three lower prongs  23 ,  24 ,  25 . Preferably, each of the recesses  14 A,  23 A,  24 A,  25 A is in the shape of a half-circle and has a diameter of approximately ⅛ inch. As shown in  FIG. 3 , the ends of the prongs  14 ,  23 ,  24 ,  25  are rounded. By squeezing the handle sections  12 ,  22  together, the upper prong  14  and the lower prongs  23 ,  24 ,  25  are moved away from each other, as illustrated in  FIGS. 4 and 5 . 
     The tensioning tool  10  can be used to aid in the formation of a rope loop  40  attached to an archery bow string  50  via cinch knots  41 ,  42 , as shown in  FIGS. 2 and 6 . The terms “rope”, “string” and “strand” can be used interchangeably throughout this application, and refer generally to any and all string-like material, including rope, string, cords, fibers, strands, yarn, etc. 
     In a preferred method of using the tool  10 , one end of a small braided rope is connected to the bow string  50  at the desired location by tying the first cinch knot  41 . Excess length of rope at the cinch knot  41  can be burned using a lighter or eliminated by other means. The loose end of the rope is then wrapped around the other side of the bow string  50  to form a loop  40  on the string  50 . The lower prongs  23 ,  24 ,  25  of the tool  10  are placed on the string  50  such that the string  50  sits in the recesses  23 A,  24 A,  25 A. The rope loop  40  is positioned in the recess  14 A of the upper prong  14 . The loose end of the rope is pulled to tighten the loop  40  on the upper prong  14 . The loose end of the rope is then pushed through the space between lower prong  23  and lower prong  24 , and brought back into the loop  40 . The rope is pulled tight to form the second cinch knot  42 . Side cutters can be used to cut the excess length of rope from the second cinch knot  42  down to a length of approximately ⅛ to ¼ inch. The remaining length of rope can then be burned using a lighter. Once the fire burns out, pressure is applied to the cinch knot  42 . 
     At this point, the bow string  50  is securely held by the lower prongs  23 ,  24 ,  25 , while the rope loop  40  is held within the upper prong  14 , as shown in  FIG. 2 . The first cinch knot  41  is positioned in the space between lower left prong  23  and middle prong  24 , and the second cinch knot  42  is positioned between lower middle prong  24  and right prong  25 . The curvature of the prongs  14 ,  23 ,  24 ,  25  conform to the shape of the loop  40 . 
     The handles  12 ,  22  are squeezed together, and the upper prong  14  moves away from the lower prongs  23 ,  24 ,  25 , thereby tightening the cinch knots  41 ,  42  and expanding the size of the loop  40 , as shown in  FIG. 2A . The tensioning tool  10  can exert approximately 400 to 500 pounds of pressure. The three pressure points on the string  50  exerted by lower prongs  23 ,  24 ,  25  allows for the upper prong  14  to tighten the cinch knots  41 ,  42  without putting an undesired curve, bend or wave in the bow string  50 , or damaging the loop  40  or string  50 . The user releases the handles  12 ,  22  to cease exerting pressure and remove the prongs  14 ,  23 ,  24 ,  25  from the rope loop  40  and string  50 . The result is a rope loop  40  that is set extremely tight on the bow string  50 , without damage to the loop  40  or string  50 , as shown in  FIG. 2 . 
     A loop set tensioning tool and a method for using same are described above. Various details of the invention may be changed without departing from its scope. Furthermore, the foregoing description of the preferred embodiments of the invention and the best mode for practicing the invention are provided for the purpose of illustration only and not for the purpose of limitation—the invention being defined by the claims, and equivalents thereof.