Durable high performance hockey stick
View Patent ↗A hockey stick comprises a shaft and a blade. The blade is configured to impact and exert energy on a hockey puck. The blade comprises a core that is generally enclosed within an outer layer. The core comprises a foam-filled cell structure having cell walls that define foam-filled cells. The cell walls of the core structure extend in a direction generally from the front face toward the rear face of the hockey stick blade.
1. A hockey stick comprising a shaft and a blade, the blade having a core substantially enclosed within an outer layer, the outer layer formed by at least one composite layer of fibers entrained in a cured resin, the fiber and resin composite fully enclosing the core and comprising a primary impact wall and a secondary impact wall that generally oppose one another, the core comprising a cell structure comprising a plurality of spaced apart cell walls, the cell structure filled with an expanded foam disposed between the cell walls, the core arranged between the primary and secondary impact walls and configured so that longitudinal axes of the cell walls generally extend in a direction from the primary impact wall toward the secondary impact wall, wherein the cell walls are made of a material that is more compliant than the primary impact wall.
2. The hockey stick of claim 1 , wherein the longitudinal axes of the cell walls generally extend in a direction generally perpendicular to the primary impact wall.
3. The hockey stick of claim 1 , wherein the primary and secondary impact walls comprise a plurality of layers of fibers.
4. The hockey stick of claim 3 , wherein the cell walls substantially engage the primary impact wall.
5. The hockey stick of claim 4 , wherein the cell walls substantially engage the secondary impact wall.
6. The hockey stick of claim 4 , wherein a layer of foam is disposed between the cell walls and the secondary impact wall.
7. The hockey stick of claim 1 , wherein the cell structure is constructed of a material having greater ability to dampen vibrations from impacts than does the composite that forms the primary impact wall.
8. The hockey stick of claim 7 , wherein the outer layer is substantially rigid and the cell structure is semi-rigid.
9. The hockey stick of claim 1 , wherein the cell structure comprises an open cell structure in which at least one cell wall is not interconnected with the other cell walls.
10. The hockey stick of claim 1 , wherein the cell structure comprises a closed cell structure in which the cell walls are interconnected.
11. The hockey stick of claim 10 , wherein cell walls intersect to form a plurality of closed cells.
12. The hockey stick of claim 11 , wherein the cell structure is arranged in a honeycomb structure.
13. The hockey stick of claim 10 , wherein a diameter of the cells is between about 1/20 in. and ½ in.
14. The hockey stick of claim 13 , wherein the diameter is between about ⅛ in. and ⅜ in.
15. The hockey stick of claim 1 , wherein the blade core comprises a first zone and a second zone, each zone comprising the cell structure and foam in a corresponding area of the core, and the first zone of the core has different structural properties than the second zone.
16. The hockey stick of claim 15 , wherein the first zone comprises a cell structure and the second zone does not comprise a cell structure.
17. The hockey stick of claim 15 , wherein the first zone comprises a foam having greater structural strength than a material of the second zone.
18. The hockey stick of claim 1 , wherein the cell walls are made of a material that is less compliant than the expanded foam.
19. The hockey stick of claim 18 , wherein the blade comprises a tenon portion adapted to connect the blade to the shaft, and in the tenon portion of the blade, the core comprises an expanded foam but does not include cell walls.
20. The hockey stick of claim 19 , wherein a spine extends between the primary and secondary impact walls, and the spine extends from a heel portion of the blade to a toe portion of the blade.
21. The hockey stick of claim 20 , wherein the core comprises an upper core portion and a lower core portion that are separated by the spine.
22. The hockey stick of claim 18 , wherein the primary impact wall comprises an insert.
23. The hockey stick of claim 22 , wherein the insert comprises a metal.
24. The hockey stick of claim 23 , wherein the spine comprises a composite made up of fibers entrained in a cured resin.
25. The hockey stick of claim 24 , wherein the upper core comprises expanded foam, and the upper core does not include cell walls extending generally from the primary impact face to the secondary impact face.