Dart flight stem

公开(公告)号:
GB202314285D0
公开(公告)日:
2023-11-01
申请号:
GB2023014285
申请日:
2021-11-10
授权日:
-
受理局:
英国
专利类型:
发明申请
简单法律状态:
审中
法律状态/事件:
实质审查
IPC分类号:
-
战略新兴产业分类:
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国民经济行业分类号:
-
当前申请(专利权)人:
COBRA INDUSTRIES LTD.
原始申请(专利权)人:
COBRA INDUSTRIES LTD.
当前申请(专利权)人地址:
Unit 3 Pindar Road, Hoddesdon, Hertfordshire, EN11 0JX, United Kingdom
工商统一社会信用代码:
-
工商登记状态:
-
工商注册地址:
-
工商成立日期:
1973-01-01
工商企业类型:
-
发明人:
-
代理机构:
-
代理人:
-
摘要:
A dart flight stem 100 comprises a first portion 140 and a second portion. The first portion 140 is formed from a first material and the second portion is formed from a second material different to the first material. The second portion is moulded or 3D-printed. Additionally, there is disclosed a dart flight stem comprising a specular component arranged to reflect light arriving from a predominantly radial direction with respect to a longitudinal axis of the flight stem towards a back end of the flight stem.
技术问题语段:
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技术功效语段:
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权利要求:
Claims 1. A dart flight stem comprising a first portion and a second portion, wherein the first portion is formed from a first material and the second portion is moulded or 3D-printed from a second material different from the first material. 2 A dart flight stem according to Claim 1, wherein the first portion is moulded or 3D-printed from the first material. 3. A dart flight stem according to Claim 1 or 2, wherein the first portion and the second portion are integrally formed as a unitary body. 4, A dart flight stem according to Claim 1, 2 or 3, wherein the first material and the second material are co- moulded. 8. A dart flight stem according to any preceding claim, wherein the second portion includes a plurality of second portions formed on the outside of the first portion. 6. A dart flight stem according to any preceding claim, wherein the first portion is formed as a core and the second material is moulded onto and/or around the core of first material to form the second portion. 1. A dart flight stem according to Claim 1 or 2, wherein the first portion is formed as a core and the second portion is formed as two or more mating pieces that form a casing around the core, optionally wherein the mating pieces are opposed halves that extend around both sides of the core either to matingly engage one another or to matingly engage the first portion. 8. A dart flight stem according to Claim 6 or 7, wherein the core includes one or more projections extending radially from a substantially cylindrical or prismatic elongate central body, and wherein the second portion substantially covers and/or surrounds the central body but not the one or more projections such that they are exposed at least at their radially outer surfaces. 9. A dart flight stem according to Claim 8, wherein the one or more projections includes at least two projections, and wherein the at least two projections extend from the elongate central body in different radial directions, optionally wherein the radial directions are substantially 60 degrees, 90 degrees, 120 degrees or 180 degrees apart with respect to a longitudinal axis of the central body. 10. A dart flight stem according to Claim 8 or 9, wherein at least one of the one or more projections is formed with a faceted or grooved outer surface. 11. A dart flight stem according to any preceding claim, wherein one of the first and second portions 1s substantially transparent or translucent and the other of the first and second portions is substantially opaque. 12. A dart flight stem according to any preceding claim, wherein one of the first and second materials is relatively resilient and the other of the first and second materials is relatively brittle. 13. A dart flight stem according to Claim 12, wherein the portion of relatively resilient material reinforces the portion of relatively brittle material. 14. A dart flight stem according to any preceding claim, wherein the flight stem includes an elongate body having a front end with a threaded connection portion and a back end with petals projecting rearwardly from bases thereof. 15. A dart flight stem according to Claim 14, wherein a region of the flight stem immediately adjacent the threaded connection portion and/or a region immediately at and adjacent the base of each of the petals is formed from the second material. 16. A dart flight stem according to Claim 15, wherein the threaded connection portion, the petals, the immediately adjacent portions of the elongate body, and a portion of the elongate body extending therebetween are integrally formed from the second material. 17. A dart flight stem according to Claim 15 or 16 as dependent directly or indirectly from Claim 12, wherein the second material is relatively resilient and the first material is relatively brittle. 18. A dart flight stem according to any preceding claim, wherein the first material is a translucent plastic, which may be polycarbonate, and the second material is an opaque polymer, which may be nylon. 19. A dart flight stem according to any preceding claim, wherein the first material and the second material have substantially the same chemical composition but at least one of the first and second materials includes an additive so that it is a different colour and/or opacity from the first material. 20. A dart flight stem comprising a specular component arranged to reflect light arriving from a predominantly radial direction with respect to a longitudinal axis of the flight stem towards a back end of the flight stem. 21. A darft flight stem according to Claim 20, wherein the specular component is arranged to reflect substantially all light in the visible spectrum. 22. A dart flight stem according to Claim 20 or 21, wherein the dart flight stem is a dart flight stem according to any one of Claims 1 to 19 and the specular component is, or 1s formed by, the first or second portion. 23. A method of manufacturing a dart flight stem comprising: providing a first portion of the flight stem made from a first material in a stem mould; and moulding a second portion of the flight stem from a second material in the stem mould together with the first portion. 24. A method of manufacturing a dart flight stem according to Claim 23, wherein moulding the second portion includes injection moulding the second portion by injecting the second material into the stem mould. 25. A method of manufacturing a dart flight stem according to Claim 23 or 24, wherein providing the first portion includes moulding the first portion in a first portion mould or 3D-printing the first portion with a 3D- printer. 26. A method of manufacturing a dart flight stem according to Claim 23, 24 or 25, wherein providing the first portion includes placing the first portion in the stem mould in an open configuration of the stem mould and closing the stem mould such that the first portion is securely held in place inside the stem mould in a closed configuration of the stem mould. 27. A method of manufacturing a dart flight stem according to any one of Claims 23 to 26, wherein the first portion includes two or more projections that are contacted by the stem mould in the closed configuration to hold the first portion in place. 28. A method of manufacturing a dart flight stem according to any one of Claims 23 to 27, wherein the stem mould secures the first portion on opposite sides of the first portion to inhibit lateral motion of the first portion during moulding of the second portion. 29. A method of manufacturing a dart flight stem according to Claim 28, wherein the stem mould includes clamp parts for securing the first portion on opposite sides, and wherein the clamp parts define windows in the sides of the moulded second portion. 30. A method of manufacturing a dart flight stem according to any one of Claim 28 or 29, wherein the lateral motion is inhibited in a direction substantially orthogonal to a direction in which a or the projections of the first portion project. 31. A method of manufacturing a dart flight stem according to any one of Claims 23 to 30, wherein moulding the second portion includes injecting the second material into the stem mould onto and/or around the first portion to form the second portion. 32. A method of manufacturing a dart flight stem according to any one of Claims 27 to 30, or Claim 31 as dependent directly or indirectly on Claim 27, wherein moulding the second portion includes substantially covering and surrounding the first portion with the second material injected into the stem mould, with the exception of the projections that are contacted by the mould, such that the projections are uncovered by the second material at least at their radially outer surfaces. 33. A method of manufacturing a dart flight stem according to any one of Claims 23 to 32, wherein the dart flight stem is a dart flight stem according to any one of Claims 1 to 22. 34. A method of manufacturing a dart flight stem comprising: providing a first component made from a first material and including a core portion; and encasing the core portion within a second component made from a second material, the second component being formed from two or more parts by placing the parts around the core and mating the two or more parts with one another and/or with the first component. 35. The method of Claim 35, wherein the two or more parts includes two halves that are arranged to matingly engage with an interference fit, and the method includes positioning the two halves on opposite sides of the core and bringing the two halves into mating engagement with one another with the core between them.
技术领域:
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背景技术:
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发明内容:
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具体实施方式:
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