Vibration dampener for archery bow
A vibration dampener for an archery bow is formed as an elastomeric member having an outer surface containing a plurality of spaced grooves which define ribs there between. Each groove has a constant depth, but the grooves toward the ends of the member are not as deep as the grooves progressing toward the center of the member. The ribs may contain spaced and aligned depressions which cooperate with the grooves to absorb vibrations from the bow in three dimensions during execution of an archery shot. Inserts are provided in each end of the dampener to stabilize the ends and to facilitate connection of the dampener with a bow stabilizer and weights.
1. A vibration dampener for an archery bow, comprising
a cylindrical elastomeric member having a longitudinal axis and a constant diameter, an outer surface of said elastomeric member containing a plurality of spaced annular grooves coaxial with said longitudinal axis, a groove intermediate each end of said elastomeric member and having a depth relative to said outer surface greater than a depth of said grooves at the ends of said elastomeric member, whereby when said vibration dampener is connected with an archery bow stabilizer, vibrations from the bow are dampened in three dimensions.
2. A vibration dampener as defined in claim 1 , wherein the depth of said grooves progressively increases from groove to groove in a direction toward a center of said elastomeric member.
3. A vibration dampener as defined in claim 2 , wherein said grooves are equally spaced along a length of said elastomeric member.
4. A vibration dampener as defined in claim 1 , wherein said outer surface of said elastomeric member contains a plurality of ribs between said grooves, said ribs containing a plurality of spaced depressions around a circumference of said elastomeric member, said depressions of said ribs being aligned in an axial direction of said elastomeric member.
5. A vibration dampener as defined in claim 4 , wherein said depressions have the same depth.
6. A vibration dampener as defined in claim 1 , and further comprising a pair of inserts molded within each end of said elastomeric member, respectively.
7. A vibration dampener as defined in claim 6 , wherein each insert contains a threaded opening which extends to an external end surface of said elastomeric member, each threaded opening extending coaxial with said elastomeric member.
8. A vibration dampener as defined in claim 7 , wherein each insert includes a flange extending radially from said threaded opening, said flange containing a plurality of spaced openings having axes parallel to said longitudinal axis, whereby when said inserts are molded within said elastomeric member, elastomeric material enters said openings and prevents said inserts from being displaced relative to said elastomeric member when the vibration dampener is in use.
9. A vibration dampener as defined in claim 8 , wherein said inserts are formed of at least one of a lightweight metal and composite rigid material.