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US 10,154,867 B2Granted
Multi-layer composite material bone screw
AssigneeCarbofix In Orthopedics LLC
InventorsOren Globerman, Mordechay Beyar, Hila Wachsler-Avrahami
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Abstract
According to some embodiments of the invention there is provided a composite material bone screw comprising: a screw core comprising straight reinforcing fibers arranged along a longitudinal axis of the screw; a winding screw thread surrounding at least a portion of the screw core; a layer intermediate the screw core and the screw thread, the layer comprising reinforcing fibers helically wound in an opposite direction to a winding direction of the screw thread.
Claims22
A composite material bone screw comprising:
- a screw core comprising straight reinforcing fibers arranged along a longitudinal axis of said screw;
- a winding screw thread surrounding at least a portion of said screw core;
- a layer intermediate said screw core and said screw thread, said layer comprising reinforcing fibers helically wound in an opposite direction to a winding direction of said screw thread.
A method of manufacturing a composite material screw, comprising:
- winding prepreg tapes over a mandrel;
- molding said prepreg tapes comprising reinforcing fibers into a thread coil while on said mandrel;
- removing said thread coil from said mandrel and placing said thread coil in a mold defining a cavity shaped according to the final screw;
- adding prepreg tapes to the mold to form a core of said screw wherein said prepreg tapes of said core include reinforcing fibers arranged along a longitudinal axis of said core;
- and
- compression molding said thread coil and said core to form said screw wherein said reinforcing fibers of said prepreg tapes of said thread coil are at an angle to said reinforcing fibers of said core.
3 more elements
Dependencies are inferred from the claim text.