| CPC F16B 35/06 (2013.01) [F16B 33/002 (2013.01); A61C 7/36 (2013.01); A61F 5/566 (2013.01)] | 12 Claims |

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1. A locking assembly for a medical device, the device adapted to adjust the position of an upper teeth engagement member to a lower teeth engagement member, the device having a plate, an elongate recess and a block slidable along said recess to adjust the position of the members relative to each other;
the locking assembly including:
a screw having an elongate shaft having a thread extending substantially towards one end and a head at the other end, the thread adapted to engage the block, the head having at least one engagement member; and
a cap having a corresponding at least one engagement member in use to lock the engagement members together to inhibit said screw from rotating in said block, wherein the cap is an elongate plate having a top surface and a bottom surface, the plate including the at least one engagement member on the bottom surface.
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