Patent US4766897A successfully refreshed from Google Patents.
US4766897A
Expired / Lapsed
US
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Capsulectomy surgical instrument
Assignee: Individual
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Filing: 1987-06-16
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Granted: 1988-08-30
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Expires: 2007-06-16
Abstract
Abstract An ophthalmic surgical instrument (10) is provided for incising the anterior lens capsule of the crystalline lens of an eye. The surgical instrument (10) includes a handle (12) adapted for support in a hand of a user. A tubular member (16) extends from the handle (12) and terminates in a loop (18). A circular cutting device (20) is rotatably mounted within the loop (18). A flexible elongate wire (24) is disposed within the tubular member (16) and is interconnected to the circular cutting device (20) and the handle (12) such that the circular cutting device (20) is rotated upon compression of the handle (12).
Inventors
- 👤 Heinz Smirmaul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:49
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/00754; A61F9/013; A61F9/0133
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
142 words
An ophthalmic surgical instrument for incising the anterior lens capsule of the crystalline lens of an eye comprising: a handle adapted for support in a hand of a user; a elongated tubular means having first and second ends, said first end being attached to said handle and said second end terminating in a loop; a circular cutting blade interconnected to said loop, such that said circular cutting blade is supported by and is rotatable within said loop; and a flexible elongate wire having first and second ends and being disposed within said elongated tubular member, said first end thereof being interconnected to said handle and said second end thereof being interconnected to said circular cutting blade, such that upon compression of said handle, said wire is retracted within said handle for rotating said cutting blade around a predetermined angle within said loop.
Claim 2
Dependent Claim
142 words
An ophthalmic surgical instrument for incising the anterior lens capsule of the crystalline lens of an eye comprising: a handle adapted for support in a hand of a user; a elongated tubular means having first and second ends, said first end being attached to said handle and said second end terminating in a loop; a circular cutting blade interconnected to said loop, such that said circular cutting blade is supported by and is rotatable within said loop; and a flexible elongate wire having first and second ends and being disposed within said elongated tubular member, said first end thereof being interconnected to said handle and said second end thereof being interconnected to said circular cutting blade, such that upon compression of said handle, said wire is retracted within said handle for rotating said cutting blade around a predetermined angle within said loop.
Claim 3
Dependent Claim
35 words
The ophthalmic surgical instrument of claim 1 wherein said handle further includes: means for temporarily deforming said flexible elongate wire within said handle to cause said flexible elongate wire to be retracted within said handle.
Claim 4
Dependent Claim
28 words
The ophthalmic surgical instrument of claim 1 wherein said handle includes: means for biasing said flexible elongate wire to return said flexible elongate wire to a nonretracted position.
Claim 5
Dependent Claim
154 words
An ophthalmic surgical instrument for incising the anterior lens capsule of the crystalline lens of an eye comprising: a handle adapted for support in a hand of a user; a elongated tubular member having first and second ends, said first end being attached to said handle and said second end terminating in a loop; said tubular member loop including a slotted aperture; a circular cutting blade slidably mounted within said loop for rotation therein; a flexible elongate wire having first and second ends and being disposed within said tubular member, said first end thereof being interconnected to said handle and said second end thereof being interconnected to said circular cutting blade; means for attaching said flexible elongate wire second end to said cutting blade, such that upon compression of said handle, said flexible elongate wire is retracted within said handle to cause rotation of said cutting blade within said loop around a predetermined angle.
Claim 6
Dependent Claim
154 words
An ophthalmic surgical instrument for incising the anterior lens capsule of the crystalline lens of an eye comprising: a handle adapted for support in a hand of a user; a elongated tubular member having first and second ends, said first end being attached to said handle and said second end terminating in a loop; said tubular member loop including a slotted aperture; a circular cutting blade slidably mounted within said loop for rotation therein; a flexible elongate wire having first and second ends and being disposed within said tubular member, said first end thereof being interconnected to said handle and said second end thereof being interconnected to said circular cutting blade; means for attaching said flexible elongate wire second end to said cutting blade, such that upon compression of said handle, said flexible elongate wire is retracted within said handle to cause rotation of said cutting blade within said loop around a predetermined angle.
Claim 7
Dependent Claim
37 words
The ophthalmic surgical instrument of claim 4 and further including: biasing means attached to said handle and to said flexible elongate wire for urging said flexible elongate wire to a nonretracted position after compression of said handle.
Claim 8
Dependent Claim
20 words
The ophthalmic surgical instrument of claim 4 wherein said slotted aperture extends for approximately the entire circumference of said loop.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |