US4811734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical cutting instrument
Assignee: Allegiance Corp
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Filing: 1987-08-13
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Granted: 1989-03-14
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Expires: 2007-08-13
Abstract
Abstract A surgical cutting instrument comprising an outer tube having a peripheral wall and a longitudinal axis. The outer tube has a plurality of openings arranged generally longitudinally along the outer tube. Each of the openings has first and second cutting edges defining portions of the periphery of such opening. Each of the first cutting edges is substantially straight as viewed in a particular direction perpendicular to the longitudinal axis of the outer tube. An inner cutting member to rotatable within the outer tube. The inner cutting member has a cutting edge cooperable with the first and second cutting edges of the openings of the outer tube for cutting material from within the patient with a shearing action.
Inventors
- 👤 Erin McGurk-Burleson
- 👤 Elmer Koehler
- 👤 Victor Packham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:04
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320016; A61B17/32002; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/00763
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
182 words
A surgical cutting instrument comprising: an outer tube sized for insertion through an opening in a patient, said outer tube having a peripheral wall and a longitudinal axis; said outer tube having a plurality of openings arranged generally longitudinally along the outer tube; each of said openings having first and second cutting edges defining portions of the periphery of such opening, said first cutting edge of each of said openings being substantially straight as viewed in a particular direction perpendicular to the longitudinal axis of the outer tube; an inner cutting member rotatable within said outer tube; said inner cutting member having a cutting edge cooperable with said first and second cutting edges of said openings of the outer tube for cutting material from within the patient with a shearing action that progresses along said first and second cutting edges as the inner cutting member rotates; and each of said openings including a curved edge which includes said second edge and each of said first edges intersecting the associated curved edge and substantially defining therewith the full periphery of the associated opening.
Claim 2
Dependent Claim
182 words
A surgical cutting instrument comprising: an outer tube sized for insertion through an opening in a patient, said outer tube having a peripheral wall and a longitudinal axis; said outer tube having a plurality of openings arranged generally longitudinally along the outer tube; each of said openings having first and second cutting edges defining portions of the periphery of such opening, said first cutting edge of each of said openings being substantially straight as viewed in a particular direction perpendicular to the longitudinal axis of the outer tube; an inner cutting member rotatable within said outer tube; said inner cutting member having a cutting edge cooperable with said first and second cutting edges of said openings of the outer tube for cutting material from within the patient with a shearing action that progresses along said first and second cutting edges as the inner cutting member rotates; and each of said openings including a curved edge which includes said second edge and each of said first edges intersecting the associated curved edge and substantially defining therewith the full periphery of the associated opening.
Claim 3
Dependent Claim
30 words
An instrument as defined in claim 1 wherein said first edge of said first opening extends circumferentially of said outer tube at an acute angle relative to a radial plane.
Claim 4
Dependent Claim
23 words
An instrument as defined in claim 1 wherein said first opening extends circumferentially of the outer tube for at least about 90 degrees.
Claim 5
Dependent Claim
30 words
An instrument as defined in claim 3 wherein said first edge of said first opening extends circumferentially of said outer tube at an acute angle relative to a radial plane.
Claim 6
Dependent Claim
46 words
An instrument as defined in claim 1 wherein the peripheral wall of said outer tube is generally cylindrical and has an outside diameter and the ratio of the length of said periphery of said first opening to said diameter is at least about 1.5 to 1.
Claim 7
Dependent Claim
30 words
An instrument as defined in claim 5 wherein said first edge of said first opening extends circumferentially of said outer tube at an acute angle relative to a radial plane.
Claim 8
Dependent Claim
13 words
An instrument as defined in claim 6 wherein said openings are substantially identical.
Claim 9
Dependent Claim
24 words
An instrument as defined in claim 1 wherein each of said first edges of said openings defines a proximal edge of the associated opening.
Claim 10
Dependent Claim
45 words
An instrument as defined in claim 1 wherein said inner cutting member includes an inner tube rotatable within said outer tube and having an opening therein, and said cutting edge of said inner tube extends along the periphery of the opening in the inner tube.
Claim 11
Dependent Claim
17 words
An instrument as defined in claim 9 wherein said opening in said inner tube is generally oval.
Claim 12
Dependent Claim
46 words
An instrument as defined in claim 1 including a handle, a motor carried by the handle, means for mounting the outer tube on the handle and means for coupling the inner cutting member to the motor so that the motor can rotate the inner cutting member.
Claim 13
Dependent Claim
84 words
An instrument as defined in claim 1 wherein each of said first edges extends circumferentially of said outer tube at an acute angle relative to a radial plane, each of said curved edges is part oval as viewed in said particular direction, said openings are substantially identical, the peripheral wall of said outer tube is generally cylindrical and has an outside diameter and the ratio of the length of each of said peripheries of said openings to said diameter is about 2 to 1.
Claim 14
Dependent Claim
153 words
A surgical cutting instrument comprising: an outer tube sized for insertion through an opening in a patient, said outer tube having a peripheral wall and a longitudinal axis; said outer tube having an opening, said opening having first and second cutting edges defining portions of the periphery of the opening, said first cutting edge of said opening being substantially straight as viewed in a particular direction perpendicular to the longitudinal axis of the outer tube; said second cutting edge being curved and intersecting the first edge to define the full periphery of the opening; an inner cutting member rotatable within said outer tube; and said inner cutting member having a cutting edge cooperable with said first and second cutting edges of said opening of the outer tube for cutting material from within the patient with a shearing action that progresses along said first and second cutting edges as the inner cutting member rotates.
Claim 15
Dependent Claim
153 words
A surgical cutting instrument comprising: an outer tube sized for insertion through an opening in a patient, said outer tube having a peripheral wall and a longitudinal axis; said outer tube having an opening, said opening having first and second cutting edges defining portions of the periphery of the opening, said first cutting edge of said opening being substantially straight as viewed in a particular direction perpendicular to the longitudinal axis of the outer tube; said second cutting edge being curved and intersecting the first edge to define the full periphery of the opening; an inner cutting member rotatable within said outer tube; and said inner cutting member having a cutting edge cooperable with said first and second cutting edges of said opening of the outer tube for cutting material from within the patient with a shearing action that progresses along said first and second cutting edges as the inner cutting member rotates.
Claim 16
Dependent Claim
26 words
An instrument as defined in claim 13 wherein said first edge extends circumferentially of said outer tube at an acute angle relative to a radial plane.
Claim 17
Dependent Claim
22 words
An instrument as defined in claim 13 wherein said opening extends circumferentially of the outer tube for at least about 90 degrees.
Claim 18
Dependent Claim
45 words
An instrument as defined in claim 13 wherein said inner cutting member includes an inner tube rotatable within said outer tube and having an opening therein, and said cutting edge of said inner tube extends along the periphery of the opening in the inner tube.
Claim 19
Dependent Claim
17 words
An instrument as defined in claim 16 wherein said opening in said inner tube is generally oval.
Claim 20
Dependent Claim
46 words
An instrument as defined in claim 13 including a handle, a motor carried by the handle, means for mounting the outer tube on the handle and means for coupling the inner cutting member to the motor so that the motor can rotate the inner cutting member.
Claim 21
Dependent Claim
62 words
An instrument as defined in claim 13 wherein said opening is formed at least in part by first and second planes which intersect on one side of said axis and form the first and second cutting edges, respectively, said first plane and said second plane enter the outer tube from said one side and the intersection of said planes forms a corner.
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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) | 1992-03-13 | 1992-09-12 | 1993-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-13 | 1996-09-12 | 1997-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-13 | 2000-09-12 | 2001-03-14 | $7700.00 | Window Closed / Lapsed |