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US6325811B1
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US
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Blades with functional balance asymmetries for use with ultrasonic surgical instruments
Assignee: Ethicon Endo Surgery Inc
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Filing: 1999-10-05
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Granted: 2001-12-04
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Expires: 2019-10-05
Abstract
Abstract Disclosed is an ultrasonic surgical instrument that combines end-effector geometry to best affect the multiple functions of a shears-type configuration. The shape of the blade is characterized by a radiused cut offset by some distance to form a curved geometry. The cut creates a curved surface with multiple asymmetries causing multiple imbalances within the blade. Imbalance due to the curve of the instrument is corrected by a non-functional asymmetry proximal to the functional asymmetry. Imbalance due to the asymmetric cross-section of the blade is corrected by the appropriate selection of the volume and location of material removed from a functional asymmetry. The shape of the blade in one embodiment of the present invention is characterized by two radiused cuts offset by some distance to form a curved and potentially tapered geometry. These two cuts create curved surfaces including a concave surface and a convex surface. The length of the radiused cuts affects, in part, the acoustic balancing of the transverse motion induced by the curved shape.
Inventors
- 👤 Jeffrey D. Messerly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:16
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320068; A61B17/320092; A61B17/28; A61B17/2812; A61B17/2816; A61B17/282; A61B2017/2825; A61B17/29; A61B2017/2926; A61B2017/2927; A61B2017/2929; A61B2017/320072; A61B2017/320074; A61B2017/320075; A61B2017/320093; A61B2017/320094; A61B2017/320095
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
70 words
A blade for an ultrasonic surgical instrument comprising: a proximal end; a distal end; a broad edge defined by a first and second parallel surface; and a narrow edge, wherein said narrow edge is defined by the intersection of a first surface and a second surface, wherein said first surface is concave and intersects the first parallel surface and the second surface is convex and intersects the second parallel surface.
Claim 2
Dependent Claim
70 words
A blade for an ultrasonic surgical instrument comprising: a proximal end; a distal end; a broad edge defined by a first and second parallel surface; and a narrow edge, wherein said narrow edge is defined by the intersection of a first surface and a second surface, wherein said first surface is concave and intersects the first parallel surface and the second surface is convex and intersects the second parallel surface.
Claim 3
Dependent Claim
28 words
The blade according to claim 1 , wherein the first surface is defined by a radiused cut having a radius from about 0.5 inches to about 2.0 inches.
Claim 4
Dependent Claim
30 words
The blade according to claim 2 , wherein the first surface is further defined by a second radiused cut having a radius from about 0.125 inches to about 0.5 inches.
Claim 5
Dependent Claim
28 words
The blade according to claim 1 , wherein the first surface extends proximally into the blade from the distal end and defining a length of the first surface.
Claim 6
Dependent Claim
19 words
The blade according to claim 4 , wherein the length is from about 8.0 mm to about 15 mm.
Claim 7
Dependent Claim
30 words
The blade according to claim 1 , wherein a tangent of the first surface and a tangent of the second surface define an angle from about 90° to about 150°.
Claim 8
Dependent Claim
12 words
The blade according to claim 1 , wherein the blade is curved.
Claim 9
Dependent Claim
85 words
A blade for an ultrasonic surgical instrument comprising: a proximal end; a distal end; a broad edge disposed between a first and second surface; and a narrow edge, wherein said narrow edge is defined by the intersection of a first curved, surface and a curved second surface, wherein said first curved surface is concave from said intersection to the point where it intersects the first surface and the second curved surface is convex from said intersection to the point where it intersects the second surface.
Claim 10
Dependent Claim
85 words
A blade for an ultrasonic surgical instrument comprising: a proximal end; a distal end; a broad edge disposed between a first and second surface; and a narrow edge, wherein said narrow edge is defined by the intersection of a first curved, surface and a curved second surface, wherein said first curved surface is concave from said intersection to the point where it intersects the first surface and the second curved surface is convex from said intersection to the point where it intersects the second surface.
Claim 11
Dependent Claim
14 words
A blade according to claim 8 , wherein the second curved surface is concave.
Claim 12
Dependent Claim
29 words
The blade according to claim 8 , wherein the first curved surface is defined by a radiused cut having a radius from about 0.5 inches to about 2.0 inches.
Claim 13
Dependent Claim
31 words
The blade according to claim 10 , wherein the first curved surface is further defined by a second radiused cut having a radius from about 0.125 inches to about 0.5 inches.
Claim 14
Dependent Claim
30 words
The blade according to claim 8 , wherein the first curved surface extends proximally into the blade from the distal end and defining a length of the first curved surface.
Claim 15
Dependent Claim
19 words
The blade according to claim 12 , wherein the length is from about 8.0 mm to about 15 mm.
Claim 16
Dependent Claim
32 words
The blade according to claim 8 , wherein a tangent of the first curved surface and a tangent of the second curved surface define an angle from about 90° to about 150°.
Claim 17
Dependent Claim
12 words
The blade according to claim 8 , wherein the blade is curved.
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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) | 2004-12-03 | 2005-06-04 | 2005-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-03 | 2009-06-04 | 2009-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-03 | 2013-06-04 | 2013-12-04 | $7700.00 | Window Closed / Lapsed |