US20140299116A1 - Flexible cable guard for a compound archery bow - Google Patents
Flexible cable guard for a compound archery bow Download PDFInfo
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- US20140299116A1 US20140299116A1 US12/581,791 US58179109A US2014299116A1 US 20140299116 A1 US20140299116 A1 US 20140299116A1 US 58179109 A US58179109 A US 58179109A US 2014299116 A1 US2014299116 A1 US 2014299116A1
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- 238000006073 displacement reaction Methods 0.000 claims description 38
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- 239000002184 metal Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 241000282326 Felis catus Species 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B5/00—Bows; Crossbows
- F41B5/14—Details of bows; Accessories for arc shooting
- F41B5/1403—Details of bows
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B5/00—Bows; Crossbows
- F41B5/10—Compound bows
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B5/00—Bows; Crossbows
- F41B5/14—Details of bows; Accessories for arc shooting
- F41B5/1403—Details of bows
- F41B5/1434—Clickers or draw indicators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
Definitions
- the field of the present invention relates to compound archery bows.
- a flexible cable guard for a compound archery bow is disclosed herein.
- a compound archery bow comprises a riser, first and second bow limbs, first and second pulley members, a draw cable, one or more additional cables, and a cable guard.
- the first and second bow limbs are attached to the riser, and the first and second pulley members are rotatably mounted on the first and second bow limbs, respectively.
- the draw cable is engaged with the first and second pulley members, and the additional cables are coupled to the first and second bow limbs.
- the bow limbs, the draw cable, and the additional cables are arranged so that pulling the draw cable to draw the bow causes (1) the pulley members to rotate and let out the draw cable, (2) each additional cable to be taken up or let out by at least one of the pulley members, and (3) the first and second bow limbs to bend toward one another.
- the cable guard comprises (1) an elongated, resilient, non-articulated member attached to and extending backward from the riser, and (2) a cable retainer engaged with the elongated member and with each additional cable.
- the cable guard is arranged with the bow at brace to retain a central portion of each additional cable displaced laterally from a shooting plane of the bow by a first cable displacement distance sufficient to enable an arrow shot by the bow to pass each additional cable substantially without interference between the additional cable and fletching of the arrow.
- the cable guard is arranged with the bow drawn to bend toward the shooting plane and to retain the central portion of each additional cable displaced laterally from the shooting plane by a second cable displacement distance sufficient to enable an arrow shot by the bow to pass each additional cable substantially without interference between the additional cable and a shaft of the arrow.
- the first cable displacement distance is larger than the second cable displacement distance.
- a method comprises arranging the cable guard on the compound bow. Another method comprises shooting an arrow with the compound bow having the cable guard.
- FIG. 1 is a side view of an exemplary compound archery bow with a cable guard.
- FIGS. 2A and 2B are partial top cross-sectional views of the exemplary bow of FIG. 1 and an arrow at brace and drawn, respectively.
- FIG. 3 is a side view of another exemplary compound archery bow with a cable guard.
- FIGS. 4A and 4B are partial top cross-sectional views of the exemplary bow of FIG. 3 and an arrow at brace and drawn, respectively.
- compound archery bow or “compound bow” shall denote an archery bow that uses a levering system, usually comprising one or more cables and pulleys, to bend the limbs as the bow is drawn.
- Compound archery bows of various types are conventional, and include pulley members rotatably mounted on the bow limbs. Those pulley members typically engage a draw cable of the bow so that pulling the draw cable to draw the bow causes the pulley members to rotate and let out the draw cable.
- One or more additional cables are coupled to the bow limbs, by one of the pulley members at one end, and by the other pulley member or directly to the bow limb at the other end.
- the additional cables are let out or taken up (according to the specific design or arrangement of a given compound bow) by the pulley members as they rotate when the bow is drawn.
- the pulley members typically comprise an assembly of journaled wheels or cams arranged to engage the corresponding cables, however, other suitable arrangements (e.g., a set of posts or an eccentric cable attachment) can be employed and fall within the scope of the present disclosure or appended claims.
- one or more of the additional cables can be referred to as a secondary or return cable.
- one or more of the additional cables typically is arranged as a so-called power or bus cable that serves to pull the bow limbs toward one another as the bow is drawn, the pulley members rotate, and at least one end of the power cables is taken up by a corresponding pulley member.
- Tension developed as the bow is drawn and one or more power cables are taken up by corresponding pulley members causes deformation of the bow limbs and storage of potential energy therein. A portion of that potential energy is transformed into the kinetic energy of the arrow shot by the bow.
- compound bows include dual-cam bows, bows that employ a Binary Cam System®, hybrid-cam bows, or single-cam bows.
- binary Cam System® binary Cam System®
- hybrid-cam bows hybrid-cam bows
- single-cam bows single-cam bows.
- the additional cables typically are positioned between the draw cable and the riser, where they would interfere with the path of an arrow as the bow is first drawn and then shot.
- many compound bows conventionally include a rigid or articulated cable guard.
- a cable guard is typically attached to the riser and arranged to displace a central portion of each additional cable laterally from the bow's shooting plane (i.e., a plane substantially defined by the draw cable travel as the bow is drawn and then shot). If sufficiently displaced, the additional cables do not interfere with the shaft or fletching of an arrow as it is nocked, the bow is drawn, and the arrow is shot.
- Conventional cable guards typically comprise a rigid or articulated member extending backward from the riser, and a cable retainer engaged with the member and with the additional cables to be laterally displaced.
- the arrangement of the limbs and pulley members results in substantial fore-and-aft motion of the additional cables as the bow is drawn.
- the cable guard for such a bow must allow for that motion of the additional cables while displacing those cables laterally.
- a common solution is a cable block slidable along a rigid cable guard rod or other member extending backward from the riser. Another solution is to mount the cable block on an articulated arm that allows the block to move with the cables.
- the cable block includes generally vertical holes or slots for receiving and retaining the additional cables while allowing one or more of them to slide through the holes or slots.
- a cable block arrangement can be used for such bows.
- one or more journaled wheels can be rotatably mounted on a rigid cable guard member, with each laterally displaced cable engaged with a journal of one of the wheels.
- any one or more of those effects can result in undesirable wear or fatigue of the bow or its parts, or can result in degraded velocity or accuracy of the bow. It is desirable to reduce the lateral force components exerted by the laterally displaced cables. This can be accomplished by reducing the lateral displacement, but at brace the lateral displacement of the cables preferably would still enable passage of the shot arrow substantially without interference between the displaced cables and the arrow's fletching.
- Exemplary compound bows 10 are illustrated schematically in FIGS. 1 and 3 , and each comprises a riser 12 , bow limbs 14 attached to the riser 10 , and pulley members 21 rotatably mounted on the limbs 14 .
- a draw cable 20 is engaged with the pulley members 21 .
- the additional cables are power cables 22 coupled at each end to the bow limbs 14 .
- each power cable 22 is connected directly at one end to the corresponding bow limb 14 , and engaged at the other end to be taken up by the corresponding pulley member 21 .
- the bow limbs 14 , the draw cable 20 , and the power cables 22 are arranged so that pulling the draw cable 20 to draw the bow causes (1) the pulley members 21 to rotate and let out the draw cable 20 , (2) each power cable 22 to be taken up by a corresponding one of the pulley members 14 , and (3) the first and second bow limbs 14 to bend toward one another.
- the exemplary bows 10 of FIGS. 1 and 3 are both arranged as dual-cam compound bows, with the additional cables being power cables 22 .
- a cable guard as disclosed and claimed herein can be employed with any suitable compound bow (e.g., dual-cam, single-cam, hybrid cam, or Binary Cam®) to laterally displace additional cables of any suitable type (e.g., power cable, bus cable, return cable, or secondary cable).
- Each of the exemplary bows 10 includes a cable guard 40 attached to the riser 12 and arranged to displace laterally the power cables 22 .
- the cable guard 40 comprises (1) an elongated, resilient, non-articulated member 42 attached to and extending backward from the riser 12 , and (2) a pair of journaled wheels 44 rotatably mounted on the member 42 that act as a cable retainer (a smaller or larger number of such wheels can be employed as needed or desired).
- FIGS. 2A and 2B are partial top cross-sectional views of the exemplary bow of FIG. 1 .
- FIGS. 2A and 2B include an arrow and depict the bow of FIG. 1 at brace and drawn, respectively.
- a non-articulated attachment can connect the member 42 to the riser 12 , substantially rigidly connecting the member 42 to riser 12 while allowing the backwardly extended portion of the member 42 to bend laterally.
- a flexible, pivotable, or articulated attachment can be employed if tension exerted by the cables 22 can be relied on to hold the cable guard 40 in place (see below).
- the member 42 can comprise a single, integrally formed, resilient member.
- member 42 can comprise multiple parts connected to form a member lacking any articulated joint (e.g., lacking any hinge, pivot, axle, or similar structure that forms a bending joint between adjacent segment of the member 42 ) but capable of elastic deformation as a whole.
- the cable guard 40 is arranged to retain a central portion of each power cable 22 displaced laterally from the shooting plane by a first cable displacement distance D1.
- the member 42 and cable retainer 44 are arranged so that, with the bow 10 at brace, the lateral component of the tension in cables 22 bends the member 42 medially toward the shooting plane, and the resulting elastic strain in the bent member 42 pulls the cables 22 laterally by the distance D1.
- the distance D1 also partly determines the lateral component of the cable tension; that lateral component varies approximately proportionally with the distance D1 for the typically small angular displacement of the cables 22 relative to the shooting plane (typically less than about 5°, and less than about 3° for most compound bows).
- the strength and stiffness of the member 42 , the position of cable retainer 44 along member 42 , and the position of cable guard 40 on the bow 10 are preferably chosen according to known methods so that the tension of the cables 22 (with the bow 10 at brace) results in a suitable amount of bend strain of member 42 and the desired lateral cable displacement D1.
- D1 can be chosen to be equal to or only slightly larger than the minimum displacement needed to avoid interference between the cables 22 and the fletching 54 of the arrow, to avoid unnecessarily large lateral force components exerted by the cables 22 .
- Slightly smaller displacement D1 can be employed that might allow only negligible interference between the cables 22 and the fletching 54 .
- the tension in cables 22 increases and further bends the member 42 medially toward the shooting plane, allowing the cables 22 to move medially as well.
- the cables 22 are displaced laterally from the shooting plane by a distance D2 ⁇ D1.
- the distance D2 is sufficient to enable the arrow shot by the bow 10 to pass the power cables 22 substantially without interference between the power cables 22 and the shaft 52 of the arrow.
- the smaller displacement D2 partly offsets the increased tension of the cables 22 , but there is still a net increase in the lateral component of the cable tension that is exerted on cable guard 40 .
- the member 42 bends further inward toward the shooting plane until the increased elastic strain in member 42 balances the increased lateral component of the cable tension.
- the stiffness of the member 42 , the position of cable retainer 44 along member 42 , and the position of cable guard 40 on the bow 10 are preferably chosen according to known methods so that the tension of the cables 22 (with the bow 10 drawn) result in a suitable amount of bend strain of member 42 and the desired distance D2.
- the cable guard returns to the arrangement shown in FIG. 2A .
- the cable guard 40 comprises (1) an elongated, resilient, non-articulated member 42 attached to and extending backward from the riser 12 , and (2) a cable block 46 slidably mounted on the elongated member that acts as a cable retainer.
- FIGS. 4A and 4B are partial top cross-sectional views of the exemplary bow of FIG. 3 . Each power cable 22 is received through and slidable through a corresponding hole or slot in the cable block 46 (holes are depicted in FIGS. 4A and 4B ).
- FIGS. 4A and 4B include an arrow and depict the bow of FIG. 3 at brace and drawn, respectively.
- the construction and attachment of member 42 can be substantially as described above for FIGS. 1 , 2 A, and 2 B.
- the displacement of the cables 22 by the member 42 and the cable block 46 as the bow 10 of FIGS. 3 , 4 A, and 4 B is drawn occurs substantially as described above for the bow 10 of FIGS. 1 , 2 A, and 2 B, with the addition of sliding motion of cable block 46 along the member 42 to accommodate fore-and-aft movement of the cables 22 as the bow 10 is drawn and then shot.
- the elastic strain on the member 42 with the bow 10 at brace is sufficient to displace laterally the cables 22 sufficiently to substantially avoid interference between the cables 22 and fletching 54 .
- Increased elastic strain on member 42 (arising from increased tension of cables 22 when the bow 10 is drawn) allows the cable block 46 and the displaced cables 22 to move toward the shooting plane but to still avoid interference between the cables 22 and the shaft 52 .
- Increased bending of member 42 results in decreased lateral tension components, relative to those that would occur with a rigid cable guard.
- member 42 Any suitably strong and resilient material can be used to form member 42 , e.g., fiberglass or other composite, plastic or polymer, wood, or metal or alloy (such as spring steel).
- An elastic modulus of a suitable material for member 42 typically can be less than about 10 Mpsi (1 Mpsi ⁇ 10 6 pounds per square inch), preferably between about 2 Mpsi and about 7 Mpsi.
- fiberglass is employed having a modulus of about 5.6 Mpsi.
- Member 42 can have any suitable cross sectional shape (e.g., circular, elliptical, oval, square, rectangular, or polygonal). It can be advantageous to employ a cross sectional shape for member 42 that is larger in a transverse dimension parallel to the shooting plane than in the orthogonal transverse dimension, to allow bending of member 42 toward the shooting plane while hindering bending toward one or the other of the bow limbs.
- the cross sectional size or shape can remain constant along the length of member 42 or can vary along that length as needed or desired.
- the cross section size and shape is preferably constant over that portion of the length of member 42 along which cable block 46 slides.
- D1 and D2 can be chosen for any suitable distances that eliminate interference between any additional cables and the fletching or shaft, respectively, of an arrow (or reduce that interference to a substantially negligible level).
- D1 or D2 might typically be made as small as practicable for fletching and shaft sizes of arrows typically shot with a given bow.
- D1 can typically range between about 0.5 inches and about 1.0 inches, preferably between about 0.65 and about 0.85 inches.
- D2 can typically range between about 0.2 inches and about 0.9 inches, preferably between about 0.4 inches and about 0.6 inches. In one particular example, D1 is about 0.75 inches and D2 is about 0.5 inches.
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Abstract
Description
- The field of the present invention relates to compound archery bows. In particular, a flexible cable guard for a compound archery bow is disclosed herein.
- Examples of compound archery bows with cable guards are disclosed in the following references.
- U.S. Pat. No. 4,834,061 entitled “Cable vibraguard” issued May 30, 1989 to Chattin;
- U.S. Pat. No. 5,718,213 entitled “Swing arm cable guard” issued Feb. 17, 1998 to Gallops et al;
- U.S. Pat. No. 6,152,124 entitled “Archery bow having an incrementally adjustable cable guard” issued Nov. 28, 2000 to Gallops;
- U.S. Pat. No. 6,425,385 entitled “Archery bow having a swing arm cable guard with adjustably mounted cable saver” issued Jul. 30, 2002 to Gallops;
- U.S. Pat. No. 6,178,958 entitled “Archery bow having a side mounted swing arm cable guard” issued Jan. 30, 2001 to Gallops;
- U.S. Pat. No. 6,655,371 entitled “Archery bow having a swing arm cable guard with adjustably mounted cable saver” issued Dec. 2, 2003 to Gallops; and
- U.S. Pat. No. 6,904,900 entitled “Archery bow with swing arm cable guard and fall-away arrow rest” issued Jun. 14, 2005 to Gallops.
- A compound archery bow comprises a riser, first and second bow limbs, first and second pulley members, a draw cable, one or more additional cables, and a cable guard. The first and second bow limbs are attached to the riser, and the first and second pulley members are rotatably mounted on the first and second bow limbs, respectively. The draw cable is engaged with the first and second pulley members, and the additional cables are coupled to the first and second bow limbs. The bow limbs, the draw cable, and the additional cables are arranged so that pulling the draw cable to draw the bow causes (1) the pulley members to rotate and let out the draw cable, (2) each additional cable to be taken up or let out by at least one of the pulley members, and (3) the first and second bow limbs to bend toward one another. The cable guard comprises (1) an elongated, resilient, non-articulated member attached to and extending backward from the riser, and (2) a cable retainer engaged with the elongated member and with each additional cable. The cable guard is arranged with the bow at brace to retain a central portion of each additional cable displaced laterally from a shooting plane of the bow by a first cable displacement distance sufficient to enable an arrow shot by the bow to pass each additional cable substantially without interference between the additional cable and fletching of the arrow. The cable guard is arranged with the bow drawn to bend toward the shooting plane and to retain the central portion of each additional cable displaced laterally from the shooting plane by a second cable displacement distance sufficient to enable an arrow shot by the bow to pass each additional cable substantially without interference between the additional cable and a shaft of the arrow. The first cable displacement distance is larger than the second cable displacement distance. A method comprises arranging the cable guard on the compound bow. Another method comprises shooting an arrow with the compound bow having the cable guard.
- Objects and advantages pertaining to a cable guard for a compound archery bow may become apparent upon referring to the exemplary embodiments illustrated in the drawings and disclosed in the following written description or appended claims.
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FIG. 1 is a side view of an exemplary compound archery bow with a cable guard. -
FIGS. 2A and 2B are partial top cross-sectional views of the exemplary bow ofFIG. 1 and an arrow at brace and drawn, respectively. -
FIG. 3 is a side view of another exemplary compound archery bow with a cable guard. -
FIGS. 4A and 4B are partial top cross-sectional views of the exemplary bow ofFIG. 3 and an arrow at brace and drawn, respectively. - The embodiments shown in the Figures are exemplary, and should not be construed as limiting the scope of the present disclosure or appended claims. Relative sizes, shapes, and proportions shown in the Figures may be distorted for clarity, and should not be considered to limit the scope of the present disclosure or appended claims.
- For purposes of the present disclosure and appended claims, the terms “compound archery bow” or “compound bow” shall denote an archery bow that uses a levering system, usually comprising one or more cables and pulleys, to bend the limbs as the bow is drawn. Compound archery bows of various types are conventional, and include pulley members rotatably mounted on the bow limbs. Those pulley members typically engage a draw cable of the bow so that pulling the draw cable to draw the bow causes the pulley members to rotate and let out the draw cable. One or more additional cables are coupled to the bow limbs, by one of the pulley members at one end, and by the other pulley member or directly to the bow limb at the other end. The additional cables are let out or taken up (according to the specific design or arrangement of a given compound bow) by the pulley members as they rotate when the bow is drawn. The pulley members typically comprise an assembly of journaled wheels or cams arranged to engage the corresponding cables, however, other suitable arrangements (e.g., a set of posts or an eccentric cable attachment) can be employed and fall within the scope of the present disclosure or appended claims.
- In some compound bows (e.g., single cam or hybrid cam bows) one or more of the additional cables can be referred to as a secondary or return cable. In most compound bows, one or more of the additional cables typically is arranged as a so-called power or bus cable that serves to pull the bow limbs toward one another as the bow is drawn, the pulley members rotate, and at least one end of the power cables is taken up by a corresponding pulley member. Tension developed as the bow is drawn and one or more power cables are taken up by corresponding pulley members causes deformation of the bow limbs and storage of potential energy therein. A portion of that potential energy is transformed into the kinetic energy of the arrow shot by the bow. Examples of compound bows include dual-cam bows, bows that employ a Binary Cam System®, hybrid-cam bows, or single-cam bows. A few examples of these various compound bow types are disclosed in the following patents, all of which are incorporated by reference as if fully set forth herein:
- U.S. Pat. No. 4,686,955 entitled “Compound archery bows” issued Aug. 18, 1987 to Larson, disclosing an example of a dual-cam compound bow;
- U.S. Pat. No. 5,368,006 entitled “Dual-feed single-cam compound bow” issued Nov. 29, 1994 to McPherson, disclosing an example of a single-cam compound bow;
- U.S. Pat. No. 6,871,643 entitled “Eccentric elements for a compound archery bow” issued Mar. 29, 2005 to Cooper et al, disclosing an example of a hybrid-cam compound bow; and
- U.S. Pat. No. 7,305,979 entitled “Dual-cam archery bow with simultaneous power cable take-up and let-out” issued Dec. 11, 2007 to Yehle, disclosing an example of a compound bow that employs a Binary Cam System®.
- Whether dual cam, single cam, hybrid cam, or Binary Cam®, the additional cables typically are positioned between the draw cable and the riser, where they would interfere with the path of an arrow as the bow is first drawn and then shot. Accordingly, many compound bows conventionally include a rigid or articulated cable guard. Such a cable guard is typically attached to the riser and arranged to displace a central portion of each additional cable laterally from the bow's shooting plane (i.e., a plane substantially defined by the draw cable travel as the bow is drawn and then shot). If sufficiently displaced, the additional cables do not interfere with the shaft or fletching of an arrow as it is nocked, the bow is drawn, and the arrow is shot.
- Conventional cable guards typically comprise a rigid or articulated member extending backward from the riser, and a cable retainer engaged with the member and with the additional cables to be laterally displaced. In some compound bows, the arrangement of the limbs and pulley members results in substantial fore-and-aft motion of the additional cables as the bow is drawn. The cable guard for such a bow must allow for that motion of the additional cables while displacing those cables laterally. A common solution is a cable block slidable along a rigid cable guard rod or other member extending backward from the riser. Another solution is to mount the cable block on an articulated arm that allows the block to move with the cables. In either case the cable block includes generally vertical holes or slots for receiving and retaining the additional cables while allowing one or more of them to slide through the holes or slots. In other compound bows there is little or no fore-and-aft motion. A cable block arrangement can be used for such bows. Alternatively, one or more journaled wheels can be rotatably mounted on a rigid cable guard member, with each laterally displaced cable engaged with a journal of one of the wheels.
- While solving the problem of interference between the arrow and the additional cables as the bow is first drawn and then the arrow is shot, conventional cable guards introduce a different problem. Lateral displacement of the additional cables causes them to exert forces on the corresponding pulley members or bow limbs that are not parallel to the shooting plane; the forces exerted by those cables include a laterally directed component. The laterally directed force components can result in tilting of the pulley members (i.e., so-called cam lean), torquing or twisting of the bow limbs, or torquing or twisting of the riser. Those effects become more pronounced as the bow is drawn and the power cables in particular experience greater tension. Any one or more of those effects can result in undesirable wear or fatigue of the bow or its parts, or can result in degraded velocity or accuracy of the bow. It is desirable to reduce the lateral force components exerted by the laterally displaced cables. This can be accomplished by reducing the lateral displacement, but at brace the lateral displacement of the cables preferably would still enable passage of the shot arrow substantially without interference between the displaced cables and the arrow's fletching.
- However, that amount of displacement is only needed when the fletching passes by the additional cables. As the bow is drawn and during the early portion of its flight (before the fletching passes the additional cables), the additional cables need only be displaced enough to clear the shaft of the arrow. Reduced lateral displacement in turn reduces the lateral force components exerted by the cables. Such reduced lateral displacement of the cables has been achieved previously by employing an articulated cable guard with its articulation axis tilted slightly, as disclosed in U.S. Pat. No. 5,718,213.
- Reduced lateral force components are achieved in a compound bow according to the present disclosure and appended claims. Exemplary compound bows 10 are illustrated schematically in
FIGS. 1 and 3 , and each comprises ariser 12, bowlimbs 14 attached to theriser 10, andpulley members 21 rotatably mounted on thelimbs 14. Adraw cable 20 is engaged with thepulley members 21. In the exemplary bows 10 (which are each both arranged as dual-cam bows), the additional cables arepower cables 22 coupled at each end to thebow limbs 14. As is typically the case for a dual-cam bow, eachpower cable 22 is connected directly at one end to thecorresponding bow limb 14, and engaged at the other end to be taken up by the correspondingpulley member 21. Thebow limbs 14, thedraw cable 20, and thepower cables 22 are arranged so that pulling thedraw cable 20 to draw the bow causes (1) thepulley members 21 to rotate and let out thedraw cable 20, (2) eachpower cable 22 to be taken up by a corresponding one of thepulley members 14, and (3) the first andsecond bow limbs 14 to bend toward one another. - The exemplary bows 10 of
FIGS. 1 and 3 are both arranged as dual-cam compound bows, with the additional cables beingpower cables 22. However, a cable guard as disclosed and claimed herein can be employed with any suitable compound bow (e.g., dual-cam, single-cam, hybrid cam, or Binary Cam®) to laterally displace additional cables of any suitable type (e.g., power cable, bus cable, return cable, or secondary cable). - Each of the exemplary bows 10 includes a
cable guard 40 attached to theriser 12 and arranged to displace laterally thepower cables 22. In the exemplary bow ofFIG. 1 , thecable guard 40 comprises (1) an elongated, resilient,non-articulated member 42 attached to and extending backward from theriser 12, and (2) a pair of journaledwheels 44 rotatably mounted on themember 42 that act as a cable retainer (a smaller or larger number of such wheels can be employed as needed or desired).FIGS. 2A and 2B are partial top cross-sectional views of the exemplary bow ofFIG. 1 .FIGS. 2A and 2B include an arrow and depict the bow ofFIG. 1 at brace and drawn, respectively. A non-articulated attachment can connect themember 42 to theriser 12, substantially rigidly connecting themember 42 toriser 12 while allowing the backwardly extended portion of themember 42 to bend laterally. Alternatively, a flexible, pivotable, or articulated attachment can be employed if tension exerted by thecables 22 can be relied on to hold thecable guard 40 in place (see below). Themember 42 can comprise a single, integrally formed, resilient member. Alternatively,member 42 can comprise multiple parts connected to form a member lacking any articulated joint (e.g., lacking any hinge, pivot, axle, or similar structure that forms a bending joint between adjacent segment of the member 42) but capable of elastic deformation as a whole. - As shown in
FIG. 2A , at brace thecable guard 40 is arranged to retain a central portion of eachpower cable 22 displaced laterally from the shooting plane by a first cable displacement distance D1. Themember 42 andcable retainer 44 are arranged so that, with thebow 10 at brace, the lateral component of the tension incables 22 bends themember 42 medially toward the shooting plane, and the resulting elastic strain in thebent member 42 pulls thecables 22 laterally by the distance D1. The distance D1 also partly determines the lateral component of the cable tension; that lateral component varies approximately proportionally with the distance D1 for the typically small angular displacement of thecables 22 relative to the shooting plane (typically less than about 5°, and less than about 3° for most compound bows). The strength and stiffness of themember 42, the position ofcable retainer 44 alongmember 42, and the position ofcable guard 40 on thebow 10 are preferably chosen according to known methods so that the tension of the cables 22 (with thebow 10 at brace) results in a suitable amount of bend strain ofmember 42 and the desired lateral cable displacement D1. D1 can be chosen to be equal to or only slightly larger than the minimum displacement needed to avoid interference between thecables 22 and thefletching 54 of the arrow, to avoid unnecessarily large lateral force components exerted by thecables 22. Slightly smaller displacement D1 can be employed that might allow only negligible interference between thecables 22 and thefletching 54. - As shown in
FIG. 2B , when thebow 10 is drawn the tension incables 22 increases and further bends themember 42 medially toward the shooting plane, allowing thecables 22 to move medially as well. With thebow 10 drawn, thecables 22 are displaced laterally from the shooting plane by a distance D2<D1. The distance D2 is sufficient to enable the arrow shot by thebow 10 to pass thepower cables 22 substantially without interference between thepower cables 22 and theshaft 52 of the arrow. The smaller displacement D2 partly offsets the increased tension of thecables 22, but there is still a net increase in the lateral component of the cable tension that is exerted oncable guard 40. Themember 42 bends further inward toward the shooting plane until the increased elastic strain inmember 42 balances the increased lateral component of the cable tension. As described above, the stiffness of themember 42, the position ofcable retainer 44 alongmember 42, and the position ofcable guard 40 on thebow 10 are preferably chosen according to known methods so that the tension of the cables 22 (with thebow 10 drawn) result in a suitable amount of bend strain ofmember 42 and the desired distance D2. When thedraw cable 20 is released to shoot the arrow, the cable guard returns to the arrangement shown inFIG. 2A . - In the exemplary bow of
FIG. 3 , thecable guard 40 comprises (1) an elongated, resilient,non-articulated member 42 attached to and extending backward from theriser 12, and (2) acable block 46 slidably mounted on the elongated member that acts as a cable retainer.FIGS. 4A and 4B are partial top cross-sectional views of the exemplary bow ofFIG. 3 . Eachpower cable 22 is received through and slidable through a corresponding hole or slot in the cable block 46 (holes are depicted inFIGS. 4A and 4B ).FIGS. 4A and 4B include an arrow and depict the bow ofFIG. 3 at brace and drawn, respectively. The construction and attachment ofmember 42 can be substantially as described above forFIGS. 1 , 2A, and 2B. - Likewise, the displacement of the
cables 22 by themember 42 and thecable block 46 as thebow 10 ofFIGS. 3 , 4A, and 4B is drawn occurs substantially as described above for thebow 10 ofFIGS. 1 , 2A, and 2B, with the addition of sliding motion ofcable block 46 along themember 42 to accommodate fore-and-aft movement of thecables 22 as thebow 10 is drawn and then shot. The elastic strain on themember 42 with thebow 10 at brace is sufficient to displace laterally thecables 22 sufficiently to substantially avoid interference between thecables 22 andfletching 54. Increased elastic strain on member 42 (arising from increased tension ofcables 22 when thebow 10 is drawn) allows thecable block 46 and the displacedcables 22 to move toward the shooting plane but to still avoid interference between thecables 22 and theshaft 52. Increased bending ofmember 42 results in decreased lateral tension components, relative to those that would occur with a rigid cable guard. - Any suitably strong and resilient material can be used to form
member 42, e.g., fiberglass or other composite, plastic or polymer, wood, or metal or alloy (such as spring steel). An elastic modulus of a suitable material formember 42 typically can be less than about 10 Mpsi (1 Mpsi≡106 pounds per square inch), preferably between about 2 Mpsi and about 7 Mpsi. In a particular example, fiberglass is employed having a modulus of about 5.6 Mpsi. -
Member 42 can have any suitable cross sectional shape (e.g., circular, elliptical, oval, square, rectangular, or polygonal). It can be advantageous to employ a cross sectional shape formember 42 that is larger in a transverse dimension parallel to the shooting plane than in the orthogonal transverse dimension, to allow bending ofmember 42 toward the shooting plane while hindering bending toward one or the other of the bow limbs. For the exemplary cable guard ofFIGS. 1 , 2A, and 2B the cross sectional size or shape can remain constant along the length ofmember 42 or can vary along that length as needed or desired. For the exemplary cable guard ofFIGS. 3 , 4A, and 4B the cross section size and shape is preferably constant over that portion of the length ofmember 42 along whichcable block 46 slides. - Any suitable distances can be chosen for D1 and D2 that eliminate interference between any additional cables and the fletching or shaft, respectively, of an arrow (or reduce that interference to a substantially negligible level). D1 or D2 might typically be made as small as practicable for fletching and shaft sizes of arrows typically shot with a given bow. D1 can typically range between about 0.5 inches and about 1.0 inches, preferably between about 0.65 and about 0.85 inches. D2 can typically range between about 0.2 inches and about 0.9 inches, preferably between about 0.4 inches and about 0.6 inches. In one particular example, D1 is about 0.75 inches and D2 is about 0.5 inches.
- It is intended that equivalents of the disclosed exemplary embodiments and methods shall fall within the scope of the present disclosure or appended claims. It is intended that the disclosed exemplary embodiments and methods, and equivalents thereof, may be modified while remaining within the scope of the present disclosure or appended claims.
- For purposes of the present disclosure and appended claims, the conjunction “or” is to be construed inclusively (e.g., “a dog or a cat” would be interpreted as “a dog, or a cat, or both”; e.g., “a dog, a cat, or a mouse” would be interpreted as “a dog, or a cat, or a mouse, or any two, or all three”), unless: (i) it is explicitly stated otherwise, e.g., by use of “either . . . or”, “only one of . . . ”, or similar language; or (ii) two or more of the listed alternatives are mutually exclusive within the particular context, in which case “or” would encompass only those combinations involving non-mutually-exclusive alternatives. For purposes of the present disclosure or appended claims, the words “comprising,” “including,” “having,” and variants thereof shall be construed as open ended terminology, with the same meaning as if the phrase “at least” were appended after each instance thereof.
- In the appended claims, if the provisions of 35 USC §112 ¶6 are desired to be invoked in an apparatus claim, then the word “means” will appear in that apparatus claim. If those provisions are desired to be invoked in a method claim, the words “a step for” will appear in that method claim. Conversely, if the words “means” or “a step for” do not appear in a claim, then the provisions of 35 USC §112 ¶6 are not intended to be invoked for that claim.
Claims (22)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/581,791 US20140299116A1 (en) | 2009-10-19 | 2009-10-19 | Flexible cable guard for a compound archery bow |
US14/454,224 US10066895B2 (en) | 2009-10-19 | 2014-08-07 | Flexible cable guard for a compound archery bow |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/581,791 US20140299116A1 (en) | 2009-10-19 | 2009-10-19 | Flexible cable guard for a compound archery bow |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/454,224 Division US10066895B2 (en) | 2009-10-19 | 2014-08-07 | Flexible cable guard for a compound archery bow |
Publications (1)
Publication Number | Publication Date |
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US20140299116A1 true US20140299116A1 (en) | 2014-10-09 |
Family
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US12/581,791 Abandoned US20140299116A1 (en) | 2009-10-19 | 2009-10-19 | Flexible cable guard for a compound archery bow |
US14/454,224 Active 2031-04-19 US10066895B2 (en) | 2009-10-19 | 2014-08-07 | Flexible cable guard for a compound archery bow |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US14/454,224 Active 2031-04-19 US10066895B2 (en) | 2009-10-19 | 2014-08-07 | Flexible cable guard for a compound archery bow |
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US (2) | US20140299116A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150153133A1 (en) * | 2013-03-15 | 2015-06-04 | Mcp Ip, Llc | Swivel Cable Guard |
US9291422B1 (en) * | 2014-10-03 | 2016-03-22 | Hoyt Archery, Inc. | Cable guard apparatus and method |
US9989329B2 (en) | 2016-09-09 | 2018-06-05 | Perfect Form Manufacturing Llc | Archery cord manager |
USRE47036E1 (en) | 2011-09-07 | 2018-09-11 | Perfect Form Manufacturing, LLC | Cable guard system for archery bows |
US20180347934A1 (en) * | 2017-06-02 | 2018-12-06 | Bear Archery, Inc. | Flexible cable guard |
US10175024B2 (en) | 2016-10-13 | 2019-01-08 | Perfect Form Manufacturing Llc | Archery cable director for archery bows |
US20210341252A1 (en) * | 2020-05-01 | 2021-11-04 | Mathew A. McPherson | Archery Bow with Centered Cable Guard |
CN114464351A (en) * | 2021-12-31 | 2022-05-10 | 无锡辰安光电有限公司 | Parallel cable and extrusion molding process system thereof |
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US4542591A (en) * | 1984-07-03 | 1985-09-24 | Glenn Montgomery | Bow sight |
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US5791324A (en) * | 1996-12-17 | 1998-08-11 | Johnson; Steven C. | Cable guard and compound archery bow containing the same |
US20110073090A1 (en) * | 2008-09-30 | 2011-03-31 | Mcpherson Mathew A | Archery Bow |
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US4834061A (en) | 1988-05-02 | 1989-05-30 | Chattin Binder Bows, Inc. | Cable vibraguard |
US5718213A (en) | 1996-01-25 | 1998-02-17 | Bear Archery, Inc. | Swing arm cable guard |
US6178958B1 (en) | 1999-08-05 | 2001-01-30 | Bear Archery, Inc. | Archery bow having a side mounted swing arm cable guard |
US6152124A (en) | 1999-08-05 | 2000-11-28 | Gallops, Jr.; Henry M. | Archery bow having an incrementally adjustable cable guard |
US6425385B1 (en) | 2001-01-24 | 2002-07-30 | Bear Archery Llc | Archery bow having a swing arm cable guard with adjustably mounted cable saver |
US6904900B2 (en) | 2001-01-24 | 2005-06-14 | Sop Services, Inc. | Archery bow with swing arm cable guard and fall-away arrow rest |
US8424511B2 (en) | 2008-10-03 | 2013-04-23 | Grace Engineering Corp. | Cable guard and guides for archery bows |
US8371283B2 (en) * | 2008-10-03 | 2013-02-12 | Grace Engineering Corp. | Cable guard and guides for archery bows |
US8784628B2 (en) | 2008-10-03 | 2014-07-22 | Grace Engineering Corp. | E-coating method for archery bow components |
-
2009
- 2009-10-19 US US12/581,791 patent/US20140299116A1/en not_active Abandoned
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US4542591A (en) * | 1984-07-03 | 1985-09-24 | Glenn Montgomery | Bow sight |
US4903678A (en) * | 1988-07-21 | 1990-02-27 | Walker Beeby G | Archery bow cable guard |
US5791324A (en) * | 1996-12-17 | 1998-08-11 | Johnson; Steven C. | Cable guard and compound archery bow containing the same |
US20110073090A1 (en) * | 2008-09-30 | 2011-03-31 | Mcpherson Mathew A | Archery Bow |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE47036E1 (en) | 2011-09-07 | 2018-09-11 | Perfect Form Manufacturing, LLC | Cable guard system for archery bows |
US20150153133A1 (en) * | 2013-03-15 | 2015-06-04 | Mcp Ip, Llc | Swivel Cable Guard |
US9303946B2 (en) * | 2013-03-15 | 2016-04-05 | Mcp Ip, Llc | Swivel cable guard |
US9291422B1 (en) * | 2014-10-03 | 2016-03-22 | Hoyt Archery, Inc. | Cable guard apparatus and method |
US9989329B2 (en) | 2016-09-09 | 2018-06-05 | Perfect Form Manufacturing Llc | Archery cord manager |
US10175024B2 (en) | 2016-10-13 | 2019-01-08 | Perfect Form Manufacturing Llc | Archery cable director for archery bows |
US20180347934A1 (en) * | 2017-06-02 | 2018-12-06 | Bear Archery, Inc. | Flexible cable guard |
US10488144B2 (en) * | 2017-06-02 | 2019-11-26 | Bear Archery, Inc. | Flexible cable guard |
US20210341252A1 (en) * | 2020-05-01 | 2021-11-04 | Mathew A. McPherson | Archery Bow with Centered Cable Guard |
US11906262B2 (en) * | 2020-05-01 | 2024-02-20 | Mcp Ip, Llc | Archery bow with centered cable guard |
CN114464351A (en) * | 2021-12-31 | 2022-05-10 | 无锡辰安光电有限公司 | Parallel cable and extrusion molding process system thereof |
Also Published As
Publication number | Publication date |
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US10066895B2 (en) | 2018-09-04 |
US20150027425A1 (en) | 2015-01-29 |
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