The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 2021
Filed:
Nov. 21, 2018
Applicant:
Warsaw Orthopedic, Inc., Warsaw, IN (US);
Inventors:
Jonathan M. Dewey, Memphis, TN (US);
William D. Armstrong, Memphis, TN (US);
Assignee:
WARSAW ORTHOPEDIC, INC., Warsaw, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F 2/44 (2006.01); A61F 2/46 (2006.01); A61F 2/30 (2006.01);
U.S. Cl.
CPC ...
A61F 2/447 (2013.01); A61F 2/4611 (2013.01); A61F 2/442 (2013.01); A61F 2/4455 (2013.01); A61F 2/4603 (2013.01); A61F 2002/3054 (2013.01); A61F 2002/30158 (2013.01); A61F 2002/30411 (2013.01); A61F 2002/30471 (2013.01); A61F 2002/30507 (2013.01); A61F 2002/30523 (2013.01); A61F 2002/30538 (2013.01); A61F 2002/30556 (2013.01); A61F 2002/30579 (2013.01); A61F 2002/30593 (2013.01); A61F 2002/4625 (2013.01); A61F 2002/4627 (2013.01); A61F 2002/4629 (2013.01);
Abstract
A geared cam expandable spinal implant. Rotational motion of a rotating portion is translated into linear motion of a yoke, which moves geared cams at the distal end of the implant to mate with, and walk along, teeth of corresponding racks. The walking of the gear cam teeth along the rack teeth creates a regular rate of implant expansion, reduces initial excessive expansion force applied to the implant, and provides fine adjustment of the expansion rate and force.