# US 12,007,216 B2 · Stabilising vane for archery or crossbow arrows > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,007,216 B2 - Document ID: US12007216B2 - Status: Granted - Kind: B2 - Application number: 17/952,397 - Filed: 2022-09-26 - Published: 2023-03-30 - Granted: 2024-06-11 - Earliest claimed: 2021-09-27 - Assignees: Top Flight Archery di Christian Striuli - Applicants: Top Flight Archery di Christian Striuli - Inventors: Christian Striuli - Web page: https://patentgrep.com/patent/US12007216B2 ## CPC - F42B 6/06: Tail ends, e.g. nocks, fletching - F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D) ## Abstract A stabilising vane for arrows is described, which comprises: a base shaped to be connected at a tail of a shaft of an arrow, wherein the base extends along a first direction between a first and a second end; where the first direction coincides with the flight direction of the vane when the arrow is in flight; a body connected to the base and extending away from the base substantially along a second direction starting from a first point positioned at a marginal position of a first side positioned at the first end and from a second point positioned at a marginal position of a second side positioned at the second end of the base; wherein the body further extends between a third side and a fourth side of the base; the first point and the second point facing the fourth side, the body has an airfoil having a convex upper surface and a concave lower surface; the body has a variable thickness. ## Claims ### Claim 1 Stabilizing vane for arrows, comprising: a base shaped to be connected at a tail of a shaft of an arrow, said base extending along a first direction between a first and a second end, the first direction coinciding with the flight direction of the vane when the arrow is in flight; a body connected to the base and extending away from the base substantially along a second direction, orthogonal to the first direction, starting from a first point positioned at a marginal position of a first side positioned at the first end and from a second point positioned at a marginal position of a second side positioned at the second end of said base; said body further extending between a third side and a fourth side of the base; said first point and said second point facing the fourth side, said body having an airfoil having a convex upper surface and a concave lower surface, said body further having a variable thickness wherein said airfoil is described by an NACA airfoil wherein M is between 1.5% and 4.5%, P is between 35.0% and 55.0% and T is between 1.5% and 4.5%. ### Claim 2 (depends on 1) Stabilizing vane according to claim 1, having: a length along the first direction between 2.54 cm and 12.7 cm; a height along the second direction variable along said second direction defining a curved line of the body, said stabilizing vane having a maximum height between 7 and 15 mm. ### Claim 3 (depends on 1) Stabilizing vane according to claim 1, wherein the body has a variable thickness along the first direction. ### Claim 4 (depends on 1) Stabilizing vane according to claim 1, wherein the body has a variable thickness along the second direction. ### Claim 5 (depends on 1) Stabilizing vane according to claim 1, wherein said body has a variable thickness along the first direction and along the second direction. ### Claim 6 (depends on 1) Stabilizing vane according to claim 1, made by injection moulding. ### Claim 7 (depends on 1) Stabilizing vane according to claim 1, made of PVC or TPU. ### Claim 8 Covering for arrows comprising: a sheath extending along a main extension direction and configured to fit on a shaft of an arrow extending along a longitudinal direction coinciding with said main extension direction when the sheath fits on the shaft; one or more stabilizing vanes placed at an end portion of the sheath, each stabilizing vane comprising: a base extending along a first direction between a first and a second end, the first direction coinciding with the main extension direction of the sheath; a body connected to the base and extending away from the base substantially along a second direction orthogonal to the first direction, said body having an airfoil having a convex upper surface and a concave lower surface, said airfoil being described by an NACA airfoil. ### Claim 9 (depends on 8) Covering according to claim 8, wherein the sheath is made of heat shrinkable material. ### Claim 10 Arrow comprising: a shaft extending along a shaft direction between a tip and a tail, one or more stabilizing vanes arranged at the tail, said tail having one or more seats to each accommodate a respective stabilizing vane, each stabilizing vane comprising: a base shaped to be connected at a tail of a shaft of an arrow, said base extending along a first direction between a first and a second end, the first direction coinciding with the flight direction of the stabilizing vane when the arrow is in flight; a body connected to the base and extending away from the base substantially along a second direction orthogonal to the first direction, said body having an airfoil having a convex upper surface and a concave lower surface, said airfoil being described by an NACA airfoil. ### Claim 11 (depends on 10) Arrow according to claim 10, wherein each stabilizing vane is arranged with the first direction parallel to the shaft direction.