Patents
US 8048124 B2: Spinal screw assembly and screw insertion tool
- Granted
- 2011-11-01
- Filed
- 2009-09-11 application 12558046
- Type
- Utility · 15 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A bone screw assembly includes a tulip-shaped seat, a bone fixation device, a ring-shaped washer, a rod and a cap. The tulip-shaped seat comprises a through opening dimensioned to receive the bone fixation device and a horizontal channel dimensioned to receive the rod. The washer is placed into the seat on top of the bone fixation device head and comprises first and second side tabs and a first pair of upward extending projections separated by a first gap and a second pair of upward extending projections separated by a second gap. The side tabs interface with a groove formed in the bottom portion of the seat. The rod is placed within the channel and positioned within a groove formed on the top surface of the washer. The cap includes first and second projections extending downward from its bottom surface and each of the first and second downward projections comprises first and second sidewise extending ridges. The first ridges of the first and second projections are aligned and placed within the first and second gaps of the washer, respectively, and interface with a first groove formed on the side portion of the seat and the second ridges interface with a second groove on the side portion of the seat when the cap is rotate.
Source: PVGPATDIS, file of 2026-04-10 (ipg111101.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| SPINEFRONTIER, INC 25 patents | US company or organization | Beverly, MA | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Kingsley R. Chin | Riviera Beach, FL | 46 | Person page FUZZY medium confidence | PVGPATDIS, file of 2026-04-10 |
| Christopher A. Chang | Beverly, MA | 10 | PVGPATDIS, file of 2026-04-10 | |
| Ernie Corrao | Bethel, CT | 21 | PVGPATDIS, file of 2026-04-10 | |
| Todd Sheppard Saunders | Boston, MA | 5 | PVGPATDIS, file of 2026-04-10 | |
| Stephen Anthony Santangelo | New Haven, CT | 49 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| A61B | Diagnosis; surgery; identification | A61B17/7032 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2020-10-05 | Assignment Assignment of assignor's interest | SPINEFRONTIER, INC signed 2019-07-01 | KIC VENTURES, LLC MALDEN, MA | 53972/737 | PASDL, file of 2026-10-15 |
| 2009-12-10 | Assignment Assignment of assignor's interest | CORRAO, ERNIE signed 2009-09-14 SANTANGELO, STEPHEN signed 2009-09-15 CHANG, CHRISTOPHER signed 2009-12-03 CHIN, KINGSLEY R signed 2009-12-03 SAUNDERS, TODD signed 2009-12-03 | SPINEFRONTIER INC BEVERLY, MA | 23632/380 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.