George D Letson

US Patent:

20090222007, Sep 3, 2009

Filed:

May 8, 2007

Appl. No.:

11/745767

Inventors:

Dennis R Aquilo - Youngsville NC, US
John E. Meyers - Columbia City IN, US
Douglas G. Branscome - Fort Wayne IN, US
Jack D. Jennings - Warsaw IN, US
Abraham P. Habegger - Warsaw IN, US
Alex P. Stoller - Fort Wayne IN, US
Kelly A. Timmons - Warsaw IN, US
Nathan Chastain - Warsaw IN, US
Marvin Figueroa - Warsaw IN, US
Clarence M. Panchison - Warsaw IN, US
Gary D. Bos - Moxee WA, US
Ernest U. Conrad - Seattle WA, US
Kimberly Les - Clarkston MI, US
Herrn Neumann - Magdeburg, DE
Mary I. O'Conner - Jacksonville FL, US
Peter S. Walker - New York NY, US
George D. Letson - Tampa FL, US
Thomas P. Vail - San Francisco CA, US

Assignee:

ZIMMER, INC. - Warsaw IN

International Classification:

A61B 17/56

US Classification:

606 62

Abstract:

The modular stem component may include a shaft portion, a head, and a sleeve. The shaft portion is configured for receipt within the intramedullary canal of a bone and the head is configured to receive another component of a modular prosthetic system, such as a femoral neck, thereon. In one exemplary embodiment, the head extends radially around at least a portion of the stem and includes a rib defining a flange extending therefrom. The sleeve, which is formed as an independent part of the modular stem component and is made at least partially of a highly porous biomaterial, includes opposing ends and has a bore extending therethrough. The bore is configured to facilitate sliding receipt of the sleeve on the head.

US Patent:

20120330430, Dec 27, 2012

Filed:

Sep 5, 2012

Appl. No.:

13/603899

Inventors:

John E. Meyers - Columbia City IN, US
George D. Letson - Tampa FL, US
Russell Windsor - Larchmont NY, US
Vincent A. Webster - Warsaw IN, US
Bill N. Sisk - Claypool IN, US
Bill H. Haywood - Warsaw IN, US
Adam Griner - Columbia City IN, US
Michael Cook - Claypool IN, US
Rodney L. Bays - Pierceton IN, US
Jerry L. Aikins - Warsaw IN, US
Marvin Figueroa - Warsaw IN, US
Peter S. Walker - New York NY, US

International Classification:

A61F 2/38

US Classification:

623 2025

Abstract:

A constrained prosthetic knee having a modular hinge post and a rotating bearing. A cannulated hinge post is rotatably connected to the femoral component of the knee prosthesis so that a hinge post extension may be anteriorly positioned through the hinge post and into the tibial component of the knee prosthesis, after positioning of the femoral component in the femur and the tibial component in the tibia. The hinge post is preassembled to the femoral component so that such assembly is not required during the implantation procedure. A meniscal component forming the rotating bearing of the knee prosthesis is packaged together with the hinge post extension so that the appropriate hinge post extension is readily available. The meniscal component includes a mechanism for preventing lift off of the meniscal component from the tibial component, while allowing rotation of the meniscal component relative to the tibial component.

US Patent:

RE44476, Sep 3, 2013

Filed:

May 7, 2010

Appl. No.:

12/776224

Inventors:

John E. Meyers - Columbia City IN, US
Jerry L. Aikins - Warsaw IN, US
Rodney L. Bays - Pierceton IN, US
Michael Cook - Claypool IN, US
Marvin Figueroa - Warsaw IN, US
Adam M. Griner - Columbia City IN, US
Bill H. Haywood - Warsaw IN, US
Bill N. Sisk - Claypool IN, US
Vincent A. Webster - Warsaw IN, US
George D Letson - Tampa FL, US
Peter S. Walker - New York NY, US
Russell Windsor - Larchmont NY, US

Assignee:

Zimmer, Inc. - Warsaw IN

International Classification:

A61F 2/38

US Classification:

623 2024, 623 1811, 623 2015, 623 2027, 623 2028

Abstract:

A constrained prosthetic knee having a modular hinge post and a rotating bearing. A cannulated hinge post is rotatably connected to the femoral component of the knee prosthesis so that a hinge post extension may be anteriorly positioned through the hinge post and into the tibial component of the knee prosthesis, after positioning of the femoral component in the femur and the tibial component in the tibia. The hinge post is preassembled to the femoral component so that such assembly is not required during the implantation procedure. A meniscal component forming the rotating bearing of the knee prosthesis is packaged together with the hinge post extension so that the appropriate hinge post extension is readily available.