US5630420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic instrument for surgical applications
Assignee: Ethicon Endo Surgery Inc
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Filing: 1995-09-29
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Granted: 1997-05-20
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Expires: 2015-09-29
Abstract
Abstract An improved surgical instrument is described wherein, an ultrasonic stack includes one or more piezoelectric sections surrounded by at least first resonator section and a second resonator section. The excitation signal for the ultrasonic stack is adapted to provide power at a first and a second frequency in order to drive the surgical tip of the instrument at a first frequency and second frequency simultaneously.
Inventors
- 👤 Jeffrey J. Vaitekunas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:38
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320068; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0611; B06B1/0614; A61B2017/00017; A61B2017/00137; A61B2017/00141; A61B2017/00146; A61B2017/0015; A61B2017/320069; A61B2017/32007; A61B2017/320089
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
77 words
A method of exciting an ultrasonic stack in a surgical instrument wherein said stack includes a piezoelectric section located between a first and a second resonator wherein said method comprises the steps of: exciting said piezoelectric section by driving said section with an electrical excitation signal at a first frequency; and simultaneously exciting said piezoelectric section by driving said section with an electrical excitation signal at a second frequency which is a multiple of said first frequency.
Claim 2
Independent Claim
77 words
A method of exciting an ultrasonic stack in a surgical instrument wherein said stack includes a piezoelectric section located between a first and a second resonator wherein said method comprises the steps of: exciting said piezoelectric section by driving said section with an electrical excitation signal at a first frequency; and simultaneously exciting said piezoelectric section by driving said section with an electrical excitation signal at a second frequency which is a multiple of said first frequency.
Claim 3
Dependent Claim
20 words
A method of exciting a stack according to claim 1 wherein said second frequency is approximately twice said first frequency.
Claim 4
Dependent Claim
25 words
A method of exciting a stack according to claim 2 wherein said stack has a fundamental frequency and said first frequency is said fundamental frequency.
Claim 5
Dependent Claim
39 words
A method of exciting a stack according to claim 1 wherein the input power of said signal at said second frequency is greater than or equal to 50% of the input power of said signal at said first frequency.
Claim 6
Dependent Claim
39 words
A method of exciting a stack according to claim 1 wherein said input power of said signal at said first frequency is greater than or equal to 50% of the input power of said signal at said second frequency.
Claim 7
Dependent Claim
66 words
An ultrasonic surgical instrument comprising: a piezoelectric section between a first and a second resonator; an power source attached to said piezoelectric section wherein said power source simultaneously supplies said piezoelectric section with an excitation signal comprising at least a first signal at a first frequency and a second signal at a second frequency wherein said second frequency is an integer multiple of said first frequency.
Claim 8
Dependent Claim
66 words
An ultrasonic surgical instrument comprising: a piezoelectric section between a first and a second resonator; an power source attached to said piezoelectric section wherein said power source simultaneously supplies said piezoelectric section with an excitation signal comprising at least a first signal at a first frequency and a second signal at a second frequency wherein said second frequency is an integer multiple of said first frequency.
Claim 9
Dependent Claim
17 words
An ultrasonic instrument according to claim 6 wherein said second frequency is approximately twice said first frequency.
Claim 10
Dependent Claim
22 words
An ultrasonic stack according to claim 7 wherein said stack has a fundamental frequency and said first frequency is said fundamental frequency.
Claim 11
Dependent Claim
35 words
Ultrasonic instrument according to claim 6 wherein the input power of said signal at said second frequency is greater than or equal to 50% of the input power of said signal at said first frequency.
Claim 12
Dependent Claim
34 words
An ultrasonic stack according to claim 6 wherein said input power of said signal at said first frequency is greater than or equal to the input power of said signal at said second frequency.
Claim 13
Dependent Claim
58 words
An ultrasonic stack comprising: a first piezoelectric section; a second piezoelectric section; a first resonator abutting a first side of said first piezoelectric section; a second resonator abutting a second side of said first piezoelectric section and a first side of said second piezoelectric section; and a third resonator abutting a second side of said second piezoelectric section.
Claim 14
Dependent Claim
58 words
An ultrasonic stack comprising: a first piezoelectric section; a second piezoelectric section; a first resonator abutting a first side of said first piezoelectric section; a second resonator abutting a second side of said first piezoelectric section and a first side of said second piezoelectric section; and a third resonator abutting a second side of said second piezoelectric section.
Claim 15
Dependent Claim
39 words
An ultrasonic stack according to claim 11 wherein said first piezoelectric section receives a drive signal at a first frequency and a said second piezoelectric section receives a drive signal at a second frequency different from said first frequency.
Claim 16
Dependent Claim
20 words
An ultrasonic stack according to claim 12 wherein said second frequency is a whole number multiple of said first frequency.
Claim 17
Dependent Claim
42 words
An ultrasonic stack according to claim 13 wherein said first piezoelectric section is located at a distance of approximately Aλ/4 from one end of said stack where A is an odd integer and λ 1 is the wavelength of said first frequency.
Claim 18
Dependent Claim
42 words
An ultrasonic stack according to claim 14 which said second piezoelectric section is located at a distance of approximately Bλ/4 from one end of said stack where B is an odd integer and λ 1 is the wavelength of said second frequency.
Claim 19
Dependent Claim
31 words
An ultrasonic stack according to claim 11 wherein said first piezoelectric section is located a distance of approximately Cλ/8 from one end of the stack where C is an even integer.
Claim 20
Dependent Claim
59 words
An ultrasonic stack according to claim 11 wherein said first piezoelectric section is located a distance of approximately Cλ/8 from one end of said stack and said second piezoelectric section is located a distance of approximately Dλ/8 from said one end of said stack where C and D are any even integer and C is not equal to D.
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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) | 2000-05-19 | 2000-11-18 | 2001-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-19 | 2004-11-18 | 2005-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-19 | 2008-11-18 | 2009-05-20 | $7700.00 | Window Closed / Lapsed |