US5174279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iris retractor for use in operations on the eye of a living creature
Assignee: Duke University Medical Center
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Filing: 1991-05-31
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Granted: 1992-12-29
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Expires: 2011-05-31
Abstract
Abstract An iris retractor for use in operating on the eye of a living creature is proposed, by means of which the iris is drawn outwards for widening the pupil and is held at the outer edge, which is essentially formed by the transition from the cornea to the sclera. The iris retractor essentially comprises a suspended part having a hook portion and a guide part and on which a platelet-like clamping part is displaceable relative to the hook portion.
Inventors
- 👤 Michael Cobo
- 👤 Dyson Hickingbotham
- 👤 Eugene de Juan, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:59
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/02; A61B17/0231; A61F; A61F9/00; A61F9/007
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
An iris retractor for use when operating on an eye of a living creature, said iris retractor comprising: a suspended part having a hook portion bent over once in a hairpin-like manner for retracting the iris and a guide portion comprising a straight portion and bent portion, said suspended part having a rod-like profile body with at least two parallel, spaced, longitudinally oriented guide faces arranged orthogonally thereto and adapted to pass through the cornea at a transition region between the sclera and cornea of the eye; and a platelet-like clamping-part for positioning and fixing said suspended part at said transition region between the sclera and cornea, said clamping part having a rectangular profile cross-section with a slot-like opening for receiving said suspended part and at least one recess for adaptation of said clamping-part to said transition region.
Claim 2
Dependent Claim
138 words
An iris retractor for use when operating on an eye of a living creature, said iris retractor comprising: a suspended part having a hook portion bent over once in a hairpin-like manner for retracting the iris and a guide portion comprising a straight portion and bent portion, said suspended part having a rod-like profile body with at least two parallel, spaced, longitudinally oriented guide faces arranged orthogonally thereto and adapted to pass through the cornea at a transition region between the sclera and cornea of the eye; and a platelet-like clamping-part for positioning and fixing said suspended part at said transition region between the sclera and cornea, said clamping part having a rectangular profile cross-section with a slot-like opening for receiving said suspended part and at least one recess for adaptation of said clamping-part to said transition region.
Claim 3
Dependent Claim
16 words
An iris retractor according to claim 1, wherein said suspended part is constructed from stainless steel.
Claim 4
Dependent Claim
15 words
An iris retractor according to claim 2, wherein the stainless steel is a chrome-nickel steel.
Claim 5
Dependent Claim
27 words
An iris retractor according to claim 1, wherein said hook portion is constructed from chrome-nickel steel and said guide portion is constructed from a flexible plastics material.
Claim 6
Dependent Claim
15 words
An iris retractor according to claim 4, wherein said flexible plastics material is silicone rubber.
Claim 7
Dependent Claim
19 words
An iris retractor according to claim 1, wherein said platelet-like clamping part is constructed from a flexible plastics material.
Claim 8
Dependent Claim
15 words
An iris retractor according to claim 6, wherein said flexible plastics material is silicone rubber.
Claim 9
Dependent Claim
27 words
An iris retractor according to claim 7, wherein said platelet-like clamping part comprises at least two slot-like openings for positioning and fixing at least two suspended parts.
Claim 10
Dependent Claim
23 words
An iris retractor according to claim 7, wherein said platelet-like clamping part comprises two accurate recesses which ensure adaptation to said transition region.
Claim 11
Dependent Claim
27 words
An iris retractor according to claim 7, wherein said platelet-like clamping part comprises a single central recess being connected to two openings oriented in the longitudinal direction.
References Cited (Backward Citations)
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US4037589A
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US4257406A
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US4387706A
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US4621619A
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US4991567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-29 | 1996-06-29 | 1996-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-29 | 2000-06-29 | 2000-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-29 | 2004-06-29 | 2004-12-29 | $7700.00 | Window Closed / Lapsed |