Christopher J Campbell

US Patent:

6602255, Aug 5, 2003

Filed:

Sep 19, 2000

Appl. No.:

09/665530

Inventors:

Christopher M. Campbell - Westwood NJ
Todd Harrington - Golden CO

Assignee:

Stryker Spine

International Classification:

A61B 1780

US Classification:

606 69, 606 70, 606 61, 606 73, 606 76

Abstract:

An implant, particularly for the spinal column, comprises a plate having openings, bone-anchoring members capable of being accommodated in the openings and at least one split-ring capable of holding the members in the orifices. The split-ring can come into direct contact with the anchoring member or members to hold the member or members in the orifices.

US Patent:

6626907, Sep 30, 2003

Filed:

Mar 9, 2001

Appl. No.:

09/803394

Inventors:

Christopher M. Campbell - Westwood NJ
Donald E. Anselm - Bermuda Dunes CA
Jason D. Blain - Palm Desert CA
Joel P. Bales - Palm Desert CA
Dan L. Pastrick - Palm Desert CA
George A. Ramirez - San Jacinto CA
Rick B. Delamarter - Los Angeles CA

Assignee:

Alphatec Manufacturing, Inc. - Carlsbad CA

International Classification:

A61B 1770

US Classification:

606 61, 606 73

Abstract:

An anterior cervical plate is disclosed, along with threaded fasteners for securing the plate to vertebrae or other osseous material. The cervical plate has several pockets or apertures, preferably at least four, to receive a corresponding number of the fasteners. The pockets have spherical surfaces, and the fasteners have heads with similarly sized spherical surfaces, which when engaged permit each of the fasteners to be oriented at a variety of projection angles with respect to the plate. In connection with each pocket, the cervical plate incorporates a fastener retaining feature. The feature can take the form of a cantilevered tab or a beam supported at its opposite ends, in each case plastically deformable between an open position for admitting the fastener and a closed position for preventing retraction.

US Patent:

7887547, Feb 15, 2011

Filed:

Feb 17, 2005

Appl. No.:

11/060171

Inventors:

Christopher M. Campbell - West New York NJ, US
Todd Harrington - Golden CO, US

Assignee:

Stryker Spine

International Classification:

A61B 17/68

US Classification:

606104, 606 86 B, 606 71, 606286

Abstract:

An implant, particularly for the spinal column, comprises a plate having openings, bone-anchoring members capable of being accommodated in the openings and at least one split-ring capable of holding the members in the orifices. The split-ring can come into direct contact with the anchoring member or members to hold the member or members in the orifices.

US Patent:

8287550, Oct 16, 2012

Filed:

Jan 6, 2011

Appl. No.:

12/985733

Inventors:

Christopher M. Campbell - West New York NJ, US
Todd Harrington - Golden CO, US

Assignee:

Stryker Spine

International Classification:

A61B 17/68

US Classification:

606104, 606 71, 606286

Abstract:

An implant has a bone plate with a bone contacting surface and an opposite outwardly facing surface. The plate includes a split-ring receiving recess open to the outwardly facing surface located intermediate first and second bone screw receiving openings in the plate. The first and second bone screw receiving openings each having a slot spaced from the outwardly facing surface towards the bone contacting surface. The slot is formed in a wall of the first and second bone screw receiving openings. The slot is open to the split ring receiving recess. A resilient split-ring has a thickness less than a height of the slots in the first and second bone screw openings when measured along the bone screw receiving opening axis. The split-ring having a contracted position wherein its maximum dimension is less than a maximum dimension of the split-ring receiving recess and an expanded position wherein an outer circumference of the split-ring extends through the slots and into the first and second bone screw receiving openings.

US Patent:

20030093082, May 15, 2003

Filed:

Dec 30, 2002

Appl. No.:

10/331212

Inventors:

Christopher Campbell - West New York NJ, US
Todd Harrington - Golden CO, US

Assignee:

Stryker Spine - Cestas

International Classification:

A61B017/58

US Classification:

606/104000

Abstract:

An implant, particularly for the spinal column, comprises a plate having openings, bone-anchoring members capable of being accommodated in the openings and at least one split-ring capable of holding the members in the orifices. The split-ring can come into direct contact with the anchoring member or members to hold the member or members in the orifices.

US Patent:

62580892, Jul 10, 2001

Filed:

May 19, 1999

Appl. No.:

9/314617

Inventors:

Christopher M. Campbell - Bermuda Dunes CA
Donald E. Anselm - Bermuda Dunes CA
Jason D. Blain - Palm Desert CA
Joel P. Bales - Palm Desert CA
Dan L. Pastrick - Palm Desert CA
George A. Ramirez - San Jacinto CA
Rick B. Delamarter - Los Angeles CA
Leonard J. Tokish - Issaquah WA

Assignee:

Alphatec Manufacturing, Inc. - Palm Desert CA

International Classification:

A61B 1768
A61B 1770

US Classification:

606 61

Abstract:

An anterior cervical plate is disclosed, along with threaded fasteners for securing the plate to vertebrae or other osseous material. The cervical plate has several pockets or apertures, preferably at least four, to receive a corresponding number of the fasteners. The pockets have spherical surfaces, and the fasteners have heads with similarly sized spherical surfaces, which when engaged permit each of the fasteners to be oriented at a variety of projection angles with respect to the plate. In connection with each pocket, the cervical plate incorporates a fastener retaining feature. The feature can take the form of a cantilevered tab or a beam supported at its opposite ends, in each case plastically deformable between an open position for admitting the fastener and a closed position for preventing retraction.