US 12,070,256 B2
Bi-spring surgical impact tool
Alexander Slocum, Bow, NH (US); Nicholas Oblas, Warsaw, IN (US); and Tom O'Donnell, Warsaw, IN (US)
Assigned to Zimmer, Inc., Warsaw, IN (US)
Filed by Zimmer, Inc., Warsaw, IN (US)
Filed on Nov. 10, 2021, as Appl. No. 17/523,540.
Claims priority of provisional application 63/111,789, filed on Nov. 10, 2020.
Prior Publication US 2022/0142693 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/92 (2006.01); A61F 2/46 (2006.01)
CPC A61B 17/92 (2013.01) [A61F 2/46 (2013.01); A61B 2017/925 (2013.01); A61B 2017/928 (2013.01); A61F 2002/4681 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A bi-spring surgical impact tool comprising:
a housing defining a cavity having a first end and a second end;
a shuttle located within the cavity and defining a plurality of indentations, the shuttle having a first end and a second end;
a pinion located proximate the shuttle and having a plurality of protrusions sized to mesh with the plurality of indentations during rotation of the pinion;
a first spring mechanically coupling the first end of the housing to the first end of the shuttle; and
a second spring mechanically coupling the second end of the housing to the second end of the shuttle,
wherein rotation of the pinion in a first rotational direction translates the shuttle in a first linear direction towards the first end of the housing and rotation of the pinion in a second rotational direction translates the shuttle in a second linear direction towards the second end of the housing.