US4766895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for corneal curvature adjustment
Assignee: Keravision Inc
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Filing: 1987-02-03
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Granted: 1988-08-30
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Expires: 2007-02-03
Abstract
Abstract In a system for adjusting the curvature of the cornea of the eye involving the insertion of a plastic split end adjusting ring into the stroma of the cornea, a holder has a concave end surface and circular groove therein for receiving a metal dissecting ring and for holding it in a circular shape. As the holder is rotated the inserted end of the metal ring is magnetically forced to follow rotation of the holder thus the dissecting ring is inserted in a circular path within the stroma.
Inventors
- 👤 Alvin E. Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:20
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/013; A61F2/00; A61F2/02; A61F2/14; A61F2/147; B; B21; B21F; B21F45/00; B21F45/008
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
Apparatus for rotatably inserting a dissecting ring that has a forward cutting end and a trailing end into the corneal tissue of the eye including; an elongated member; a concave concentrical surface on one end of said elongated member concentric groove means within said surface to releasably retain said dissecting ring; means within said concave concentrical surface to abut against said trailing end; surface means on at least a portion of said elongated member to facilitate rotation of said elongated member.
Claim 2
Dependent Claim
81 words
Apparatus for rotatably inserting a dissecting ring that has a forward cutting end and a trailing end into the corneal tissue of the eye including; an elongated member; a concave concentrical surface on one end of said elongated member concentric groove means within said surface to releasably retain said dissecting ring; means within said concave concentrical surface to abut against said trailing end; surface means on at least a portion of said elongated member to facilitate rotation of said elongated member.
Claim 3
Dependent Claim
24 words
The apparatus of claim 1 wherein said elongated member is cylindrical and further including circular sleeve means arranged for receiving said elongated member therein.
Claim 4
Dependent Claim
98 words
Apparatus for inserting an adjusting ring into the corneal tissue of the eye including; an elongated member; a concave concentrical surface on one end of said elongated member; concentric groove means in said concave surface, said groove means is arranged to receive a split dissecting ring and further including pin means extending outwardly from said groove for engaging one end of said dissecting ring; surface means on at least a portion of said elongated members to facilitate rotation of said elongated member; and magnet means for generating a magnetic field near said one end of said elongated member.
Claim 5
Dependent Claim
98 words
Apparatus for inserting an adjusting ring into the corneal tissue of the eye including; an elongated member; a concave concentrical surface on one end of said elongated member; concentric groove means in said concave surface, said groove means is arranged to receive a split dissecting ring and further including pin means extending outwardly from said groove for engaging one end of said dissecting ring; surface means on at least a portion of said elongated members to facilitate rotation of said elongated member; and magnet means for generating a magnetic field near said one end of said elongated member.
Claim 6
Dependent Claim
19 words
Apparatus according to claim 1 including a magnet means for generating a magnetic field adjacent said concave concentrical surface.
References Cited (Backward Citations)
US3074407A
Cited
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 |