Pre-stressed hockey shaft
View Patent ↗A hockey stick comprising a shaft portion and a blade portion, the shaft portion including means having preformed stresses to induce a flexural resistance at about mid-span so as to create in the shaft portion induced stresses which are neutralized as stresses are further induced in the shaft portion at impact on the blade portion to thereby provide a stiffer and more rigid shaft portion.
1. A stiff and rigid hockey stick with a flexural pre-stressed shaft comprising a shaft and a blade attached to an extremity of the shaft, said shaft comprising a pre-stressed portion at mid span of the handle portion, along a length thereof, said pre-stressed portion comprising preformed stresses, said preformed stresses being neutralized, as stresses are further induced in said shaft at impact on said blade, before generation of a deflection at the mid span of the handle portion, wherein said shaft comprises at least one curved molded piece, said at least one curved molded piece being straightened and locked in place, forming said pre-stressed portion.
2. The hockey stick of claim 1 , wherein said shaft comprises carbon fibers embedded in a thermoset resin.
3. The hockey stick of claim 1 , said shaft comprising a single molded curved piece, said single molded curved piece being straightened and locked in place with a secondary component bonded to one of: i) the inside and ii) the outside of the shaft.
4. The hockey stick of claim 1 , said shaft comprising two curved molded half shafts, said half shafts being bonded back to back after straightening.