Patent ID: 7900365

Claim:
An archery sight assembly comprising: an archery sight defining a longitudinal sighting direction; a mounting bracket arranged to be substantially rigidly attached to an archery bow; and a positioning mechanism coupling the archery sight to the mounting bracket and arranged to provide adjustment of the position or orientation of the archery sight relative to the mounting bracket, which positioning mechanism includes at least one linear bearing for providing substantially linear motion of the archery sight along a corresponding direction substantially transverse to the sighting direction, wherein the linear bearing comprises: a bearing track having along at least a portion of its length a U-shaped cross-section transverse to a direction of motion defined by the linear bearing, each of two side portions of the U-shaped cross section of the bearing track having a corresponding groove on its inner surface arranged substantially parallel to the defined direction of motion, the grooves of the corresponding side portions facing one another across the bearing track; a bearing slide positioned between the side portions of the bearing track and reciprocally moveable within the bearing track along the defined direction of motion, the bearing slide having a groove on each of two opposite sides, each bearing slide groove arranged substantially parallel to the defined direction of motion and facing a corresponding one of the bearing track grooves; and a pair of cylindrical bearing members, each cylindrical bearing member being positioned with its corresponding cylinder axis substantially parallel to the defined direction of motion and engaged with corresponding facing bearing track grooves and bearing slide grooves, each cylindrical bearing being arranged to slide along at least one of the corresponding engaged grooves as the bearing slide moves along the defined direction within the bearing track, wherein the bearing track comprises discrete longitudinal portions that each correspond to one of the side portions, and that are arranged to be urged toward one another so as to apply an adjustable level of compression to the cylindrical bearing members with the corresponding engaged grooves, and to thereby permit movement of the bearing slide within the bearing track with a desired level of stiffness.