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US6030401A
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US
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Vertebral enplate decorticator and osteophyte resector
Assignee: NUBASIVE Inc
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Filing: 1998-10-07
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Granted: 2000-02-29
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Expires: 2018-10-07
Abstract
Abstract A device for removing cortical tissue from a vertebral endplate, comprising: an elongated handle; a rotatably-mounted driving rod received in said handle; a dumbbell-shaped burr connected to said driving rod; and an eccentric support having first and second opposite ends, said first end being connected to said handle and said second forming a collar around said dumbbell-shaped burr.
Inventors
- 👤 James F. Marino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:14
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1662; A61B17/1671; A61B17/14; A61B17/142; A61B17/144; A61B17/32; A61B17/320016; A61B17/32002; A61B17/1659; A61B17/00234; A61B2017/00238; A61B2017/00261
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
53 words
An device for bone decortication and osteophyte resection, comprising: an elongated handle; a rotatably-mounted driving rod received in said handle; a burr axially connected to said driving rod; and an eccentric support connected to said burr and projecting outwardly from said elongated handle to a distance greater than a radius of the burr.
Claim 2
Independent Claim
53 words
An device for bone decortication and osteophyte resection, comprising: an elongated handle; a rotatably-mounted driving rod received in said handle; a burr axially connected to said driving rod; and an eccentric support connected to said burr and projecting outwardly from said elongated handle to a distance greater than a radius of the burr.
Claim 3
Dependent Claim
37 words
The device for bone decortication and osteophyte resection as set forth in claim 1, wherein, said burr is dumbbell-shaped, said eccentric support terminates in a collar which is disposed around a narrow portion of said dumbbell-shaped burr.
Claim 4
Dependent Claim
27 words
The device for bone decortication and osteophyte resection as set forth in claim 1, further comprising, at least one gripping structure projecting outwardly from the eccentric support.
Claim 5
Independent Claim
100 words
A method of removing bony tissue from a vertebral endplate, comprising, inserting an instrument having a rotatable burr mounted to an elongated handle and an eccentric support projecting outwardly from said elongated handle to a distance greater than a radius of the burr into a patient's intervertebral space; rotating the instrument to position the eccentric support against a first vertebral surface; pivoting the instrument about a contact point between the eccentric support and the first vertebral surface such that the rotatable burr is held firmly against a second vertebral surface opposite the first vertebral surface; and rotating the rotatable burr.
Claim 6
Independent Claim
100 words
A method of removing bony tissue from a vertebral endplate, comprising, inserting an instrument having a rotatable burr mounted to an elongated handle and an eccentric support projecting outwardly from said elongated handle to a distance greater than a radius of the burr into a patient's intervertebral space; rotating the instrument to position the eccentric support against a first vertebral surface; pivoting the instrument about a contact point between the eccentric support and the first vertebral surface such that the rotatable burr is held firmly against a second vertebral surface opposite the first vertebral surface; and rotating the rotatable burr.
Claim 7
Dependent Claim
31 words
The method of removing bony tissue from a vertebral endplate as set forth in claim 4, wherein, the instrument is inserted into the patient's intervertebral space through a percutaneously inserted cannula.
Claim 8
Dependent Claim
74 words
An improved surgical tool having a handle and a work element which rotates about an axis defined by the handle, wherein the handle provides a support surface for the work element and defines a work region on the work element for engagement against a body surface, wherein the improvement comprises a fulcrum attached to the handle and defining a pivot point disposed on a side of the work element away from the work region.
Claim 9
Dependent Claim
74 words
An improved surgical tool having a handle and a work element which rotates about an axis defined by the handle, wherein the handle provides a support surface for the work element and defines a work region on the work element for engagement against a body surface, wherein the improvement comprises a fulcrum attached to the handle and defining a pivot point disposed on a side of the work element away from the work region.
Claim 10
Dependent Claim
27 words
An improved surgical tool as in claim 6, wherein the fulcrum is disposed on a side of the work element opposite to that of the work region.
Claim 11
Dependent Claim
26 words
An improved surgical tool as in claim 6, wherein the tool is selected from the group consisting of an osteophyte resector and a vertebral endplate decorticator.
Claim 12
Dependent Claim
21 words
An improved surgical tool as in claim 6, wherein the work element rotates about a fixed axis relative to the handle.
Claim 13
Dependent Claim
29 words
An improved surgical tool as in claim 6, wherein the handle comprises a straight shaft having an axis which is aligned with the rotational axis of the work element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-02-28 | 2003-08-30 | 2004-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-02-28 | 2007-08-30 | 2008-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-02-28 | 2011-08-30 | 2012-02-29 | $7700.00 | Window Closed / Lapsed |