EP0765637A2
Expired / Lapsed
EP
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Ultrasonic instrument for surgical applications
Assignee: Ethicon Endo Surgery Inc
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Filing: 1996-09-27
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Granted: —
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Expires: 2016-09-27
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 Joseph Vaitekunas
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 19:44
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: 13
Claim 1
Independent Claim
76 words
A method of exciting an ultrasonic stack in a medical 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 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
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 3
Dependent Claim
71 words
A method of exciting a stack according to Claim 1 or Claim 2 wherein: either 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; or said input power of said signal at said first frequency is greater than or equal 50% to the input power of said signal at said second frequency.
Claim 4
Dependent Claim
64 words
An ultrasonic instrument comprising: a piezoelectric section between a first and a second resonator; a power source attached to said piezoelectric section wherein said power source 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 5
Dependent Claim
17 words
An ultrasonic instrument according to Claim 4 wherein said second frequency is approximately twice said first frequency.
Claim 6
Dependent Claim
67 words
An ultrasonic instrument according to Claim 4 or Claim 5 wherein: either 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; or said input power of said signal at said first frequency is greater than or equal to the input power of said signal at said first frequency.
Claim 7
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 sedction.
Claim 8
Dependent Claim
38 words
An ultrasonic stack according to Claim 7 wherein said first piezoelectric section receives a drive signal at a first frequency and said second piezoelectric section receives a drive signal at a second frequency different from said first frequency.
Claim 9
Dependent Claim
20 words
An ultrasonic stack according to Claim 8 wherein said second frequency is a whole number multiple of said first frequency.
Claim 10
Dependent Claim
46 words
An ultrasonic stack according to any one of Claims 7 to 9 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 is the wavelength of said first frequency.
Claim 11
Dependent Claim
47 words
An ultrasonic stack according to any one of Claims 7 to 10 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 12
Dependent Claim
36 words
An ultrasonic stack according to any one of Claims 7 to 9 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 13
Dependent Claim
41 words
An ultrasonic stack according to Claim 12 wherein 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.
References Cited (Backward Citations)
No citation records indexed.
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