Patent US5451229A successfully refreshed from Google Patents.
US5451229A
Expired / Lapsed
US
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Cannula for an eye-surgery instrument
Assignee: Geuder AG
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Filing: 1994-04-22
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Granted: 1995-09-19
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Expires: 2014-04-22
Abstract
Abstract A cannula for an eye-surgery instrument, employed to shatter the lens of the eye by high-frequency oscillation and to suction out the fragments. It accommodates a suction channel with a section that is wider toward the tip of the cannula. The wider section (20) comprises at least two straight bores (8, 9, & 10), one wider than another, extending coaxial with the suction channel (7) into the cannula (1) from its tip (5). Fragments of the shattered lens accumulate in the bores in accordance with size, where they can be further fragmented by ultrasound.
Inventors
- 👤 Volker Geuder
- 👤 Hans Geuder
- 👤 Dieter Frauenfeld
- 👤 Hans-Reinhard Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:01
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/00745; A61B; A61B17/00; A61B17/32; A61B17/320068; A61B2017/320072; A61B2017/32008; Y; Y10; Y10S; Y10S604/00; Y10S604/902
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
113 words
An eye-surgery instrument comprising: a cannula with a distal tip, oscillating means attached to said cannula for generating high-frequency oscillations to said cannula, said instrument being configured for shattering an eye lens by said high-frequency oscillations and suctioning out fragments occurring from said shattering; a suction channel in said cannula having a section widening toward said tip of the cannula, said widening section having at least two bores, one of said two bores being wider than the other bore, said suction channel having a remaining non-widening section, both of said bores having cross-sections wider than said remaining non-widening section, said bores extending coaxially with said suction channel into the cannula from said tip.
Claim 2
Dependent Claim
113 words
An eye-surgery instrument comprising: a cannula with a distal tip, oscillating means attached to said cannula for generating high-frequency oscillations to said cannula, said instrument being configured for shattering an eye lens by said high-frequency oscillations and suctioning out fragments occurring from said shattering; a suction channel in said cannula having a section widening toward said tip of the cannula, said widening section having at least two bores, one of said two bores being wider than the other bore, said suction channel having a remaining non-widening section, both of said bores having cross-sections wider than said remaining non-widening section, said bores extending coaxially with said suction channel into the cannula from said tip.
Claim 3
Dependent Claim
30 words
A cannula as defined in claim 1, wherein the wider bore is located distally of the other bore; and further including transitions between said bores comprising conically tapering annular shoulders.
Claim 4
Dependent Claim
36 words
A cannula as defined in claim 1, wherein the wider bore is located distally of the other bore; and further including a transition between said bores and said suction channel comprising a conically tapering annular shoulder.
Claim 5
Dependent Claim
15 words
A cannula as defined in claim 1, wherein each bore extends to a different length.
Claim 6
Dependent Claim
14 words
A cannula as defined in claim 1, wherein said widening section has three bores.
Claim 7
Dependent Claim
13 words
A cannula as defined in claim 1, wherein said bores are straight bores.
Claim 8
Dependent Claim
142 words
An eye-surgery instrument comprising: a cannula with a distal tip, oscillating means attached to said cannula for generating high-frequency oscillations to said cannula, said instrument being configured for shattering an eye lens by said high-frequency oscillations and suctioning fragments occurring from said shattering; a suction channel in said cannula having a section widening toward said tip of the cannula, said widening section having at least two bores, one of said two bores being wider than the other bore, said suction channel having a remaining non-widening section, both of said bores having cross-sections wider than said remaining non-widening section, said bores extending coaxially with said suction channel into the cannula from said tip; wherein the wider bore is located distally of the other bore, and further including transitions between said bores comprising conically tapering annular shoulders; each bore extending to a different length.
Claim 9
Dependent Claim
142 words
An eye-surgery instrument comprising: a cannula with a distal tip, oscillating means attached to said cannula for generating high-frequency oscillations to said cannula, said instrument being configured for shattering an eye lens by said high-frequency oscillations and suctioning fragments occurring from said shattering; a suction channel in said cannula having a section widening toward said tip of the cannula, said widening section having at least two bores, one of said two bores being wider than the other bore, said suction channel having a remaining non-widening section, both of said bores having cross-sections wider than said remaining non-widening section, said bores extending coaxially with said suction channel into the cannula from said tip; wherein the wider bore is located distally of the other bore, and further including transitions between said bores comprising conically tapering annular shoulders; each bore extending to a different length.
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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) | 1998-09-18 | 1999-03-20 | 1999-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-18 | 2003-03-20 | 2003-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-18 | 2007-03-20 | 2007-09-19 | $7700.00 | Window Closed / Lapsed |