EP4483121A1 - Construction de branche d'arc de tir - Google Patents

Construction de branche d'arc de tir

Info

Publication number
EP4483121A1
EP4483121A1 EP23760711.4A EP23760711A EP4483121A1 EP 4483121 A1 EP4483121 A1 EP 4483121A1 EP 23760711 A EP23760711 A EP 23760711A EP 4483121 A1 EP4483121 A1 EP 4483121A1
Authority
EP
European Patent Office
Prior art keywords
limb
spacer
assembly
archery
bow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23760711.4A
Other languages
German (de)
English (en)
Other versions
EP4483121A4 (fr
Inventor
Mathew Mcpherson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MCP IP LLC
Original Assignee
MCP IP LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MCP IP LLC filed Critical MCP IP LLC
Priority claimed from PCT/US2023/013870 external-priority patent/WO2023164165A1/fr
Publication of EP4483121A1 publication Critical patent/EP4483121A1/fr
Publication of EP4483121A4 publication Critical patent/EP4483121A4/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F41B5/0005—Single stave recurve bows
    • F41B5/0026—Take-down or foldable bows
    • F41B5/0052—Limbs

Definitions

  • This invention relates generally to archery bows and more specifically to limb technology useful in archery bows.
  • a user When an arrow is launched from an archery bow, a user might feel an initial force shock and residual vibrations. It is desirable to minimize shock and vibration in an archery bow.
  • an archery bow limb assembly comprises a first limb, a second limb and a spacer.
  • the spacer contacts the first limb and the second limb.
  • the first limb comprises a limb material.
  • the spacer comprises a spacer material comprising a higher elastic modulus than the limb material.
  • a width of the spacer is less than a width of the first limb.
  • the first limb comprises a first engagement region arranged to be supported by a limb cup, and the spacer contacts the first engagement region.
  • the first limb comprises a working length portion and the spacer contacts the working length portion.
  • the first limb comprises a second engagement region arranged to support an axle or bowstring, and the spacer contacts the second engagement region.
  • the spacer comprises a body portion and a flange, wherein the flange comprises a greater width than the body.
  • the flange contacts a first end surface of the first limb.
  • the flange contacts a second end surface of the first limb.
  • the flange contacts top surfaces of the first limb and the second limb.
  • the flange contacts bottom surfaces of the first limb and the second limb.
  • the spacer extends an entire length of the first limb.
  • the first limb comprises an aperture arranged to receive an axle and the spacer comprises an aperture arranged to receive the axle.
  • a limb cup is arranged to support the first limb and the second limb.
  • the limb cup comprises a groove and a portion of the spacer oriented in the groove.
  • the first limb comprises a different width from the second limb.
  • the limb material comprises a composite material comprising reinforcing fibers and the spacer comprises an elastomeric material.
  • Figure 2 shows a partially exploded view of the embodiment of Figure 1.
  • Figure 3 shows a bottom view of an embodiment of a limb construction.
  • Figure 4 shows a cross-sectional view of an embodiment of a limb cup and embodiments of limb assemblies.
  • Figure 5 shows a cross-sectional view of embodiments of limb assemblies.
  • Figure 6 shows an embodiment of an archery bow.
  • Figures 7 and 8 show another embodiment of a limb construction.
  • Figure 1 shows an embodiment of a limb construction 20.
  • Figure 2 shows a partially exploded view of the embodiment of Figure 1.
  • a limb assembly 30 comprises a first limb 32 and a second limb 34.
  • the first limb 32 and second limb 34 each comprise a first material, such as a composite material comprising reinforcing fibers and resin, or any other suitable known archery bow limb material.
  • the limb assembly 30 comprises a spacer 36.
  • the spacer 36 comprises a second material that is different from the first material.
  • the second material is generally more flexible than the first material, for example having a lower elastic modulus.
  • the second material is highly flexible as compared to the first material and the spacer 36 acts as a shock absorber or vibration damper.
  • a spacer 36 can comprise any suitable material.
  • a spacer 36 comprises a polymer.
  • a spacer 36 comprises a thermoplastic material.
  • a spacer 36 comprises a thermoset material.
  • a spacer 36 comprises an elastomeric material.
  • a spacer 36 comprises a thermoplastic elastomer.
  • a spacer 36 comprises a thermoplastic vulcanisate.
  • a spacer 36 comprises thermoplastic polyurethane.
  • a spacer 36 comprises a single material having a unitary construction.
  • a spacer 36 is formed by a molding process, such as injection molding.
  • a spacer 36 comprises a fabric, cloth, felt or other suitable textile formed from fibers comprising any suitable material.
  • a limb assembly 30 comprises a first engagement region 62, a working length portion 64 and a second engagement region 66.
  • the first engagement region 62 is arranged to engage a support, such as a limb cup 50.
  • the working length portion 64 extends between the first engagement region 62 and the second engagement region 66.
  • the second engagement region 66 is arranged to engage and support another portion of an archery' bow, such as an axle.
  • the first limb 32 and the second limb 34 comprise a similar longitudinal cross-sectional shape.
  • the spacer 36 comprises a longitudinal cross-sectional shape similar to the first limb 32.
  • the spacer 36 comprises a body portion 37 and a flange 38.
  • the flange 38 is wider than the body portion 37.
  • the body portion 37 contacts a side surface of a limb 32, 34 and the flange 38 is arranged to contact respective top, bottom and/or end surfaces of the limb 32, 34.
  • the second engagement region 66 of a limb assembly 30 is arranged to support an axle.
  • the limb assembly 30 comprises an aperture 26, for example arranged to receive an axle.
  • the first limb 32, the spacer 36 and the second limb 34 each comprise apertures 26 that are aligned with one another.
  • the spacer 36 contacts an entire side surface 28 of a limb 32, 34 continuously, for example from a first end 61 to a second end 67. In some embodiments, the body portion 37 contacts an entire side surface 28 of a limb 32, 34 continuously.
  • a limb assembly 30 comprises a bearing accessory 58.
  • a bearing accessory 58 is attached to the second engagement region 66.
  • a bearing accessory 58 comprises features as disclosed in US 9389040, the entire content of which is hereby incorporated herein by reference.
  • a bearing accessory 58 comprises a cavity 59 arranged to engage a bow press. In some embodiments, a bearing accessory 58 comprises a single piece of material. In some embodiments, a bearing accessory 58 is attached to a first limb 32 and is attached to a second limb 34. In some embodiments, the bearing accessory' 58 comprises a surface 72 arranged to contact the first limb 32 and the second limb 34. In some embodiments, the surface 72 is planar. In some embodiments, a bearing accessory 58 comprises a first surface 72 and a second surface 73 separated by a groove 74. In some embodiments, the first surface 72 contacts the first limb 32 and the second surface 73 contacts the second limb 34.
  • the first surface 72 is coplanar with the second surface 73.
  • the groove 74 provides clearance for a spacer 36.
  • a fastener such as a screw, abuts and passes through a limb 32, 34, 42, 44 and engages a bearing accessory 58.
  • a bearing accessory 58 comprises a plurality of threaded holes to engage fasteners for securement to a limb assembly 30, 40.
  • a limb cup 50 comprises a limb pad 51.
  • a limb pad 51 comprises a first surface 52 and a second surface 53 separated by a groove 54.
  • the first surface 52 and second surface 53 comprise curvature in a longitudinal direction of a limb assembly 30.
  • the first surface 52 extends parallel to the second surface 53.
  • the first limb 32 contacts the first surface 52 and the second limb 34 contacts the second surface 53.
  • the groove 54 provides clearance for the spacer 36.
  • the spacer 36 extends continuously between the location of the second force and the location of the first force. In some embodiments, the spacer 36 extends continuously across the portion of the limb 32, 34 oriented in the limb cup 50. In some embodiments, a spacer 36 extends continuously from the location of the limb pad 51 through the working length portion 64 of the limb 32, 34. In some embodiments, a spacer 36 extends continuously from the location of the limb pad 51 through the second engagement region 66 of the limb 32, 34.
  • the second limb assembly 40 is similar to the first limb assembly 30.
  • an aperture 26 of the second limb assembly 40 is arranged on a common axis 76 with an aperture 26 of the first limb assembly 30.
  • the limb construction 20 supports an axle, which supports a cam or rotating member.
  • the first limb assembly 30 is oriented to a first side of a rotating member and the second limb assembly 40 is oriented to a second side of the rotating member (see also Figure 6).
  • Figure 3 shows a bottom view of an embodiment of a limb construction 20.
  • the limb cup 50 comprises a first cavity 56 arranged to receive the first limb assembly 30 and a second cavity 57 arranged to receive the second limb assembly 40.
  • a cavity 56, 57 comprises at least one protrusion 78 arranged to engage a sidewall of the limb assembly 30, 40.
  • a cavity 56, 57 comprises a pair of diverging surfaces 80 arranged in a V- shape.
  • each diverging surface 80 of a given pair is arranged to contact one of the limb members 32, 34, 42, 44 of a respective limb assembly 30, 40.
  • a cavity 56, 57 comprises an airspace 81 located between the pair of diverging surfaces 80.
  • the airspace 81 provides clearance for a spacer 36, 46.
  • Figure 4 shows a cross-sectional view of an embodiment of a limb cup 50 and embodiments of limb assemblies 30, 40.
  • a cavity 56, 57 comprises a first surface 82 and a second surface 83 separated by a groove 84.
  • the first surface 82 contacts the first limb 32 of a limb assembly 30 and the second surface 83 contacts the second limb 34 of the limb assembly 30.
  • the groove 84 provides clearance for a spacer 36.
  • Figure 5 shows a cross-sectional view of embodiments of a first limb assembly 30 and a second limb assembly 40.
  • a width wb of the body 37 of a spacer 36 is less than a width wi of a limb 32, 34.
  • a width wr of the flange 38 is greater than a width wb of the body 37.
  • the width of a spacer 36 is less than the width of the first limb 32 and less than the width of the second limb 34. In some embodiments, the width of the body wb of a spacer 36 is less than the width of the first limb 32 and less than the width of the second limb 34. In some embodiments, the width of the flange wf of a spacer 36 is less than the width of the first limb 32 and less than the width of the second limb 34.
  • Figure 6 shows an embodiment of an archery' bow 10 comprising a first limb construction 50a arranged to support a first rotatable member 14 and a second limb construction 50b arranged to support a second rotatable member 16.
  • a first limb 32 and a second limb 34 each comprise a coating, such as a powder coated paint.
  • a spacer 36 contacts the coating of the first limb 32 and contacts the coating of the second limb 34.
  • a spacer 36 can have any suitable size and shape.
  • a spacer 36 fills a gap between limbs (e.g. 32, 34).
  • a spacer 36 acts as an energy damper.
  • a limb assembly 30 comprises multiple spacer 36 members distributed along the length of the limb assembly 30.
  • a first spacer is oriented in a first engagement region 62.
  • second spacer is oriented in a second engagement region 66.
  • the limbs 32, 34 that comprise a limb assembly 30 are similar to one another, for example comprising similar materials and dimensions.
  • the limbs 32, 34 that comprise a first limb assembly 30 are similar to the limbs 42, 44 that comprise a second limb assembly 40.
  • a third limb 42 is similar to a first limb 32, for example comprising similar materials and dimensions.
  • a third limb 42 is similar to a second limb 34, for example comprising similar materials and dimensions.
  • various limb members 32, 34, 42, 44 can be different from one another.
  • a first limb 32 that contacts a spacer 36 is different from a second limb 34 that contacts the spacer 36, such that the first limb 32 provides a different amount of supporting force to an axle than the second limb 34.
  • a first limb 32 and a second limb 34 can comprise similar materials but have different dimensions.
  • a thickness profile of a second limb 34 is different from the thickness profile of a first limb 32.
  • Figures 7 and 8 show another embodiment of a limb construction 20.
  • a first limb 32 comprises a width wi (see Figure 5) that is different from a width wi of a second limb 34.
  • a first limb 32 comprises a greater width wi than a second limb 34.
  • a spacer 36 is offset from a longitudinal midplane of a limb assembly 30.
  • a spacer 36 extends parallel to a longitudinal midplane of the limb assembly 30.
  • a second limb assembly 40 comprises a mirror image of a first limb assembly 30.
  • a first limb 32 comprises a greater width wi than a second limb 34 and a third limb 42 comprises a greater width wi than a fourth limb 44.
  • a first limb 32 is sized and shaped similar to a fourth limb 44 and a second limb 34 is sized and shaped similar to a third limb 42.
  • a second spacer 46 is offset from a longitudinal midplane of a second limb assembly 40.
  • a second spacer 46 extends parallel to a longitudinal midplane of the second limb assembly 40.
  • a bearing accessory 58 comprises a groove 74. In some embodiments, the groove 74 is offset from a longitudinal midplane of the bearing accessory . In some embodiments, a first bearing accessory 58 comprises a mirror image of a second bearing accessory 68.
  • a limb assembly 30 as disclosed herein can be used on any suitable type of archery bow.
  • an archery bow comprises a non-compound or recurve style bow, for example comprising a bowstring that attaches directly to the limb assembly 30.
  • a bowstring contacts a first limb 32 and a second limb 34.
  • the bowstring further contacts a spacer 36.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

Dans certains modes de réalisation, un ensemble branche d'arc de tir comprend une première branche, une seconde branche et un espaceur. L'espaceur entre en contact avec la première branche et la seconde branche. La première branche comprend un matériau de branche. L'espaceur comprend un matériau d'espaceur ayant un module d'élasticité supérieur à celui du matériau de branche. Une largeur de l'espaceur est inférieure à une largeur de la première branche.
EP23760711.4A 2022-02-25 2023-02-24 Construction de branche d'arc de tir Pending EP4483121A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US202263314241P 2022-02-25 2022-02-25
US202263424072P 2022-11-09 2022-11-09
PCT/US2023/013870 WO2023164165A1 (fr) 2022-02-25 2023-02-24 Construction de branche d'arc de tir

Publications (2)

Publication Number Publication Date
EP4483121A1 true EP4483121A1 (fr) 2025-01-01
EP4483121A4 EP4483121A4 (fr) 2026-02-25

Family

ID=93746057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23760711.4A Pending EP4483121A4 (fr) 2022-02-25 2023-02-24 Construction de branche d'arc de tir

Country Status (1)

Country Link
EP (1) EP4483121A4 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8505526B1 (en) * 2009-02-04 2013-08-13 Mcp Ip, Llc Archery bow
CA3022277C (fr) * 2016-04-25 2022-05-24 Stress Engineering Services, Inc. Branche d'arc et arc pour le tir a l'arc l'utilisant
US11226166B2 (en) * 2018-10-24 2022-01-18 Mcp Ip, Llc Archery bow limb assembly

Also Published As

Publication number Publication date
EP4483121A4 (fr) 2026-02-25

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