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 method for making a sporting implement blade portion configured to withstand repeated impacts, comprising:
providing a core comprising a foam-filled cell structure, the cell structure comprising a plurality of spaced apart cell walls that cooperate to define a plurality of cells therebetween, the cell walls arranged so that each cell has a longitudinal axis, the foam being disposed in the cells;
enclosing the core in a generally rigid outer layer comprising at least one composite layer of fibers entrained in a cured resin, the outer layer having an impact surface; and
treating the foam so that it preferentially expands in a desired direction prior to enclosing the core within the outer layer;
wherein the cell structure is arranged relative to the outer layer such that the longitudinal axis is generally transverse to the impact surface.
2. The method of claim 1 , wherein the core is arranged so that the foam preferentially expands in a direction generally away from the impact surface.
3. The method of claim 2 , wherein treating the foam comprises roughening a surface of the foam.
4. The method of claim 1 , wherein the cell walls are made of a material that is more compliant than the outer layer.
5. A method for making a sporting implement blade portion configured to withstand repeated impacts, comprising:
providing a core comprising a foam-filled cell structure, the cell structure comprising a plurality of spaced apart cell walls that cooperate to define a plurality of cells therebetween, the cell walls arranged so that each cell has a longitudinal axis, the foam being disposed in the cells; and
enclosing the core in a generally rigid outer layer comprising at least one composite layer of fibers entrained in a cured resin, the outer layer having an impact surface;
wherein the cell structure is arranged relative to the outer layer such that the longitudinal axis is generally transverse to the impact surface, and wherein the cell walls are made of a material that is more compliant than the outer layer and less compliant than the foam.
6. The method of claim 5 , wherein providing the core comprises providing a sheet stock of a foam-filled cell structure and cutting it to a desired size.
7. The method of claim 5 , wherein providing the core comprises providing a cell structure shaped to generally approximate a shape of the core, placing the shaped cell structure in a mold that approximates the shape of the core, and injecting an expanding structural foam into the mold.
8. The method of claim 5 additionally comprising providing a second core, arranging the second core adjacent the first core, and enclosing both the first and second cores in a generally rigid outer layer so that a generally rigid spine is disposed between the first and second cores.
9. The method of claim 8 , wherein the second core is made of a different material than the first core.
10. The method of claim 9 , wherein the second core comprises a foam-filled cell structure.
11. The method of claim 5 , wherein the cell walls are made of a material having greater ability to dampen vibrations from impacts than does the composite layer.
12. The method of claim 5 , wherein a diameter of the cells is between about ⅛ in. and ⅜ in.
13. The method of claim 5 , wherein the 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 does the second zone.
14. The method of claim 5 additionally comprising providing a handle portion, and joining the blade portion to the handle portion, wherein the blade portion comprises a tenon adapted to connect to the handle portion, and in the tenon of the blade portion, the core comprises an expanded foam but does not include cell walls.
15. The method of claim 5 additionally comprising placing an insert in the impact surface of the outer layer, the insert constructed of a different material than the rest of the outer layer.
16. The method of claim 15 , wherein the insert comprises a metal.
17. The method of claim 5 additionally comprising treating the foam so that it preferentially expands in a desired direction prior to enclosing the core within the outer layer.
18. The method of claim 17 , wherein the core is arranged so that the foam preferentially expands in a direction generally away from the impact surface.
19. The method of claim 18 , wherein treating the foam comprises roughening a surface of the foam.
20. The method of claim 5 , wherein the cell structure is arranged so that at least some of the cell walls are substantially in contact with the outer layer.
21. A method for making a sporting implement having a handle portion and a blade portion configured to withstand repeated impacts, comprising:
providing a blade core comprising a foam-filled cell structure, the cell structure comprising a plurality of spaced apart cell walls that cooperate to define a plurality of cells therebetween, the cell walls arranged so that each cell has a longitudinal axis, the foam being disposed in the cells;
enclosing the blade core in a generally rigid outer layer comprising at least one composite layer of fibers entrained in a cured resin, the outer layer having an impact surface;
providing a handle portion; and
joining the blade portion to the handle portions;
wherein the blade portion comprises a tenon adapted to connect to the handle portion, and in the tenon of the blade portion, the core comprises an expanded foam but does not include cell walls;
wherein the cell structure is arranged relative to the outer layer such that the longitudinal axis is generally transverse to the impact surface.
22. A sports stick having a handle portion and a contact portion, the contact portion configured to impact a sports implement and having a cover comprising a primary impact face and a secondary impact face that generally oppose one another, the cover comprising at least one composite layer of fibers entrained in a cured resin, and a generally rigid elongate spine extends between the primary and secondary impact faces along the length of the contact portion, the contact portion further comprising an upper core and a lower core substantially surrounded by the cover, the upper and lower cores being separated from one another by the elongate spine, at least one of the cores comprising a celled structural member constructed of a different material than the cover and comprising a plurality of cell walls, the cell walls arranged to extend generally in a direction from the primary impact face to the secondary impact face, wherein the cell walls are constructed of a first material and the primary impact face is constructed of a second material, the first material being more compliant than the second material, wherein the cell walls are more compliant than the primary impact face, the celled structural member comprising an expanded foam disposed between the cell walls, wherein the foam is more compliant than the cell walls.
23. The sports stick of claim 22 , wherein the celled member is configured to absorb and dampen vibrations from impacts to the primary impact face.
24. The sports stick of claim 22 , wherein the spine comprises a composite made up of fibers entrained in a cured resin.
25. The sports stick of claim 22 , wherein the upper core has different structural properties than the lower core.
26. The sports stick of claim 25 , wherein both the upper core and the lower core comprise a celled structural member comprising an expanded foam disposed between the cell walls.
27. The sports stick of claim 22 , wherein the primary impact face comprises an insert attached thereto, the insert constructed of a different material than the rest of the impact face.
28. The sports stick of claim 27 , wherein the insert comprises a metal.
29. The sports stick of claim 22 , wherein the contact portion is elongate and has a heel end and a toe end, and the spine extends from the heel end to toe end.
30. A sports stick having a handle portion and a contact portion, the contact portion configured to impact a sports implement and having a cover comprising a primary impact face and a secondary impact face that generally oppose one another, the cover comprising at least one composite layer of fibers entrained in a cured resin, the primary impact face comprising an insert attached thereto, the insert constructed of a different material than the rest of the primary impact face, the insert comprising a metal, and a generally rigid elongate spine extends between the primary and secondary impact faces along the length of the contact portion, the contact portion further comprising an upper core and a lower core substantially surrounded by the cover, the upper and lower cores being separated from one another by the elongate spine, at least one of the cores comprising a celled structural member constructed of a different material than the cover and comprising a plurality of cell walls, the cell walls arranged to extend generally in a direction from the primary impact face to the secondary impact face.