US 12,226,129 B2
Fastening devices, systems, and methods
Mary Sinnott, Logan, UT (US); and Andrew Fauth, North Logan, UT (US)
Assigned to RTG SCIENTIFIC, LLC, Austin, TX (US)
Filed by RTG Scientific, LLC, Austin, TX (US)
Filed on Feb. 9, 2022, as Appl. No. 17/668,320.
Claims priority of provisional application 63/147,640, filed on Feb. 9, 2021.
Prior Publication US 2022/0323131 A1, Oct. 13, 2022
Int. Cl. A61B 17/86 (2006.01); A61B 17/68 (2006.01); A61B 17/70 (2006.01); A61B 17/72 (2006.01); A61F 2/40 (2006.01); A61B 17/00 (2006.01); A61B 17/56 (2006.01); A61F 2/30 (2006.01)
CPC A61B 17/704 (2013.01) [A61B 17/7032 (2013.01); A61B 17/7034 (2013.01); A61B 17/7037 (2013.01); A61B 17/725 (2013.01); A61B 17/8605 (2013.01); A61B 17/8625 (2013.01); A61B 17/863 (2013.01); A61F 2/4014 (2013.01); A61F 2/4081 (2013.01); A61B 2017/00477 (2013.01); A61B 2017/00526 (2013.01); A61B 2017/564 (2013.01); A61B 2017/681 (2013.01); A61F 2002/30332 (2013.01); A61F 2220/0033 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A compression fastener comprising:
a shaft comprising:
a proximal end;
a distal end;
a proximal shaft portion;
a distal shaft portion; and
a smooth shaft portion intermediate the proximal shaft portion and the distal shaft portion;
a helical thread disposed about the shaft, the helical thread comprising:
at least one concave undercut surface; and
a plurality of pitches, the plurality of pitches comprising:
at least one first pitch along the proximal shaft portion; and
at least one second pitch along the distal shaft portion; and
a cutting flute formed in the proximal shaft portion and configured to urge bone chips distally toward the smooth shaft portion as the compression fastener is rotated into a bone;
wherein:
the at least one concave undercut surface is angled towards one of the proximal end and the distal end of the shaft;
the at least one first and second pitches are not equal to each other; and
a first minor diameter of the shaft along the proximal shaft portion is equal to a second minor diameter of the shaft along the distal shaft portion.