Patent US4553966A successfully refreshed from Google Patents.
US6533749B1
Expired / Lapsed
US
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Angled rotary tissue cutting instrument with flexible inner member
Assignee: Medtronic Xomed LLC
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Filing: 1999-09-24
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Granted: 2003-03-18
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Expires: 2019-09-24
Abstract
Abstract An angled rotary tissue cutting instrument includes an outer member or blade, having a rigid outer tube with proximal and distal portions connected by a bend, and an inner member or blade rotatably disposed within the outer member and including an inner tube of integral one-piece construction having a spiral cut formed therein between proximal and distal ends thereof to define a flexible region adjacent the bend, and at least one layer of a spirally wound strip of material superimposed over the spiral cut portion of the inner tube. The spiral cut preferably extends to a cutting tip at the distal end of the inner tube so that the inner member can be bent closer to the distal end thereof to access difficult to reach areas of the head and neck, and other parts of the body.
Inventors
- 👤 Miro Mitusina
- 👤 Gary Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:11
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320016; A61B17/32002; A61B17/28; A61B17/29; A61B2017/2901; A61B2017/2904; A61B2017/2905
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
108 words
An angled rotary tissue cutting instrument comprising an outer member including a rigid tube having proximal and distal portions connected by a bend and a cutting window defined at a distal end of said tube; and an inner member rotatably disposed within said outer member and including an inner tube of integral one-piece construction with a helical cut formed therein in a first direction to define a flexible region adjacent said bend, a cutting tip disposed at a distal end of said inner tube adjacent said cutting window, and a first strip of material spirally wound over said helical cut in a second direction opposite said first direction.
Claim 2
Dependent Claim
108 words
An angled rotary tissue cutting instrument comprising an outer member including a rigid tube having proximal and distal portions connected by a bend and a cutting window defined at a distal end of said tube; and an inner member rotatably disposed within said outer member and including an inner tube of integral one-piece construction with a helical cut formed therein in a first direction to define a flexible region adjacent said bend, a cutting tip disposed at a distal end of said inner tube adjacent said cutting window, and a first strip of material spirally wound over said helical cut in a second direction opposite said first direction.
Claim 3
Dependent Claim
31 words
An angled rotary tissue cutting instrument as recited in claim 1 wherein opposite ends of said first strip are secured to said inner tube on opposite sides of said helical cut.
Claim 4
Dependent Claim
47 words
An angled rotary tissue cutting instrument as recited in claim 2 and further comprising a second strip of material spirally wound over said first strip of material in said first direction and having opposite ends secured to said inner tube on opposite sides of said first strip.
Claim 5
Dependent Claim
39 words
An angled rotary tissue cutting instrument as recited in claim 3 wherein said first and second strips are secured to said inner tube by welding respective opposite ends of said strips 360° about a circumference of said inner tube.
Claim 6
Dependent Claim
55 words
An angled rotary tissue cutting instrument as recited in claim 3 wherein said helical cut and said second strip are each oriented at a first angle relative to a longitudinal axis of said inner tube and said first strip of material is oriented at a second angle which is the supplement of said first angle.
Claim 7
Dependent Claim
26 words
An angled rotary tissue cutting instrument as recited in claim 1 wherein said inner tube and said cutting tip are formed as an integral one-piece unit.
Claim 8
Dependent Claim
26 words
An angled rotary tissue cutting instrument as recited in claim 6 wherein said cutting tip is hollow with an opening formed therein defining a suction inlet.
Claim 9
Dependent Claim
34 words
An angled rotary tissue cutting instrument as recited in claim 7 wherein said helical cut terminates distally at said cutting tip to permit said outer member to be bent immediately adjacent said cutting tip.
Claim 10
Dependent Claim
29 words
An angled rotary tissue cutting instrument as recited in claim 8 wherein said bend is located less than about 0.5 inch from a distal end of said cutting tip.
Claim 11
Dependent Claim
18 words
An angled rotary tissue cutting instrument as recited in claim 1 wherein said cutting tip includes a bur.
Claim 12
Dependent Claim
45 words
An angled rotary tissue cutting instrument as recited in claim 10 wherein said inner tube has an open distal end and said cutting tip includes a neck extending proximally from said bur to be disposed telescopically within said open distal end of said inner tube.
Claim 13
Dependent Claim
30 words
An angled rotary tissue cutting instrument as recited in claim 11 wherein a side-facing opening is formed in said inner tube adjacent said cutting tip to define a suction inlet.
Claim 14
Dependent Claim
37 words
An angled rotary tissue cutting instrument as recited in claim 1 wherein an annular space is formed between said inner member and said outer member to define a channel for supplying irrigating fluid to said cutting tip.
Claim 15
Independent Claim
117 words
A method of fabricating an angled rotary tissue cutting instrument comprising the steps of (a) forming an inner member by: (i) forming a helical cut in a first direction in an inner tube; (ii) forming a cutting tip at a distal end of the inner tube; and (iii) wrapping a first strip of material spirally over the helical cut in a second direction opposite said first direction; (b) forming an outer member having a rigid tube with a cutting window at a distal end; (c) inserting the inner member into the outer member such that the cutting tip is disposed adjacent the cutting window; and (d) bending the outer member in the vicinity of the helical cut.
Claim 16
Independent Claim
117 words
A method of fabricating an angled rotary tissue cutting instrument comprising the steps of (a) forming an inner member by: (i) forming a helical cut in a first direction in an inner tube; (ii) forming a cutting tip at a distal end of the inner tube; and (iii) wrapping a first strip of material spirally over the helical cut in a second direction opposite said first direction; (b) forming an outer member having a rigid tube with a cutting window at a distal end; (c) inserting the inner member into the outer member such that the cutting tip is disposed adjacent the cutting window; and (d) bending the outer member in the vicinity of the helical cut.
Claim 17
Dependent Claim
60 words
A method of fabricating an angled rotary tissue cutting instrument as recited in claim 14 wherein said step of forming a helical cut in the inner tube includes forming the helical cut such that the cut extends to the cutting tip, and wherein said step of bending the outer member includes bending the outer member immediately adjacent the cutting tip.
Claim 18
Dependent Claim
41 words
A method of fabricating an angled rotary tissue cutting instrument as recited in claim 15 wherein said step of bending the outer member includes bending the outer member less than about 0.5 inch from a distal end of the outer member.
Claim 19
Dependent Claim
44 words
A method of fabricating an angled rotary tissue cutting instrument as recited in claim 14 wherein said step of forming the inner member further includes the step of (iv) wrapping a second strip of material spirally over the helical cut in the first direction.
Claim 20
Dependent Claim
73 words
A method of fabricating an angled rotary tissue cutting instrument as recited in claim 17 wherein said step of forming the inner member further includes the steps of (v) securing opposite ends of the first strip of material to the inner tube on opposite sides of the helical cut; and (vi) securing opposite ends of the second strip of material to the inner tube on opposite sides of the first strip of material.
Claim 21
Dependent Claim
43 words
A method of fabricating an angled rotary tissue cutting instrument as recited in claim 18 wherein said steps of securing opposite ends of the first and second strips of material includes welding the strip ends 360° about the circumference of the inner tube.
Claim 22
Dependent Claim
33 words
A method of fabricating an angled rotary tissue cutting instrument as recited in claim 14 wherein said step of forming a helical cut is performed using an inner tube of integral one-piece design.
Claim 23
Dependent Claim
48 words
A method of fabricating an angled rotary tissue cutting instrument as recited in claim 20 wherein the inner tube includes a hollow distal end and said step of forming a cutting tip includes forming an opening with cutting edges in the hollow distal end of the inner tube.
Claim 24
Dependent Claim
65 words
A method of fabricating an angled rotary tissue cutting instrument as recited in claim 20 wherein the inner tube includes an open distal end and said step of forming a cutting tip includes inserting a neck at the proximal end of a bur into the open distal end of the inner tube and forming a side-facing opening in the inner tube adjacent the cutting tip.
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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) | 2006-03-17 | 2006-09-16 | 2007-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-03-17 | 2010-09-16 | 2011-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-03-17 | 2014-09-16 | 2015-03-18 | $7700.00 | Window Closed / Lapsed |