US 12,007,216 B2
Stabilising vane for archery or crossbow arrows
Christian Striuli, Limana (IT)
Assigned to Top Flight Archery di Christian Striuli, Limana BL (IT)
Filed by Top Flight Archery di Christian Striuli, Limana (IT)
Filed on Sep. 26, 2022, as Appl. No. 17/952,397.
Claims priority of application No. 102021000024626 (IT), filed on Sep. 27, 2021.
Prior Publication US 2023/0102323 A1, Mar. 30, 2023
Int. Cl. F42B 6/06 (2006.01)
CPC F42B 6/06 (2013.01) 11 Claims
OG exemplary drawing
 
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%.
 
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.
 
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.