Patent US5779711A successfully refreshed from Google Patents.
US5779711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corneal flap/cap elevator
Assignee: Individual
•
Filing: 1995-11-22
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Granted: 1998-07-14
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Expires: 2015-11-22
Abstract
Abstract An elevating instrument and method for atraumatically lifting a corneal cap or flap during corneal lamellar surgery having a handle and an elevator head at one end of said handle. The head has a leading edge with an inclined top face extending vertically away from said edge and a bottom face for atraumatically engaging the corneal surface. The head is adapted for insertion into a corneal cap or flap incision with said leading edge and inclined top face exposing a corneal edge for lifting the cap or flap.
Inventors
- 👤 Michiel S. Kritzinger
- 👤 Stephen A. Updegraff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:23
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/013; A61B; A61B17/00; A61B17/02; A61B17/0231; A61F9/0133; A61F9/0136; A61B90/00; A61B90/39; A61B2090/3937; A61B2090/395; A61M; A61M2210/00; A61M2210/06; A61M2210/0612
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
91 words
An elevating instrument for use in atraumatically lifting a corneal cap or flap during corneal lamellar surgery comprising a handle, and an elevator head at one end of said handle, said head having a concave leading edge with an inclined top face extending vertically upward away from said edge and a concave bottom surface for atraumatically engaging the corneal surface, said head adapts for insertion into a corneal cap or flap incision with said concave leading edge and inclined top face exposing a corneal edge for lifting the cap or flap.
Claim 2
Dependent Claim
91 words
An elevating instrument for use in atraumatically lifting a corneal cap or flap during corneal lamellar surgery comprising a handle, and an elevator head at one end of said handle, said head having a concave leading edge with an inclined top face extending vertically upward away from said edge and a concave bottom surface for atraumatically engaging the corneal surface, said head adapts for insertion into a corneal cap or flap incision with said concave leading edge and inclined top face exposing a corneal edge for lifting the cap or flap.
Claim 3
Dependent Claim
24 words
The instrument of claim 1 wherein said elevator head is angularly disposed with respect to said handle to facilitate lifting the cap or flap.
Claim 4
Dependent Claim
19 words
The instrument of claim 2 wherein said elevator head is disposed at about 90° with respect to said handle.
Claim 5
Dependent Claim
11 words
The instrument of claim 1 wherein said top face is convex.
Claim 6
Dependent Claim
45 words
The instrument of claim 1 with said head having a heel section and a toe section, said handle connected to said heel section, said toe section forming said leading edge and inclined top face, said bottom surface being concave between said heel and toe sections.
Claim 7
Dependent Claim
27 words
The instrument of claim 5 wherein said bottom surface is configured for engagement of only said heel and toe sections of said head with the corneal surface.
Claim 8
Dependent Claim
19 words
The instrument of claim 1 wherein said concave leading edge is blunt to prevent tearing of the corneal edge.
Claim 9
Dependent Claim
15 words
The instrument of claim 7 wherein said arcuate edge is beveled and has rounded ends.
Claim 10
Dependent Claim
22 words
The instrument of claim 7 wherein said concave ading edge is sloped and is approximately 3 mm to 4 mm in length.
Claim 11
Dependent Claim
133 words
An elevating instrument for use in atraumatically lifting a corneal cap or flap during corneal lamellar surgery comprising a handle, and an elevator head angularly disposed at one end of said handle, said head having a concave leading edge with an inclined convex top face extending vertically upward away from said edge and a concavl bottom surface for atraumatically engaging the corneal surface, said head adapts for insertion into a corneal cap or flap incision with said concave leading edge and inclined top face exposing a corneal edge for lifting the cap or flap, said head having a heel section and a toe section, said handle connected to said heel section, said toe section forming said leading edge and inclined top face, said bottom surface being concave between said heel and toe sections.
Claim 12
Dependent Claim
133 words
An elevating instrument for use in atraumatically lifting a corneal cap or flap during corneal lamellar surgery comprising a handle, and an elevator head angularly disposed at one end of said handle, said head having a concave leading edge with an inclined convex top face extending vertically upward away from said edge and a concavl bottom surface for atraumatically engaging the corneal surface, said head adapts for insertion into a corneal cap or flap incision with said concave leading edge and inclined top face exposing a corneal edge for lifting the cap or flap, said head having a heel section and a toe section, said handle connected to said heel section, said toe section forming said leading edge and inclined top face, said bottom surface being concave between said heel and toe sections.
Claim 13
Dependent Claim
17 words
The elevating instrument of claim 10 wherein said concave leading edge is beveled and has rounded ends.
Claim 14
Dependent Claim
27 words
The elevating instrument of claim 10 wherein said bottom surface is configured so that only said heel and toe sections of said head engage the corneal surface.
Claim 15
Independent Claim
105 words
A method of atraumatically lifting a corneal flap or cap during corneal lamellar surgery comprising providing a corneal elevating instrument having a handle and an elevator head with a concave leading edge and an inclined top face extending vertically upward away from said edge and having a concave bottom surface for atraumatically engaging the corneal surface, placing said instrument at the edge of a corneal cap or flap incision, exposing said corneal flap or cap edge by inserting the elevator edge into the incision and atraumatically lifting said edge on said inclined top face, and peeling back said edge to provide said cap or flap.
Claim 16
Independent Claim
105 words
A method of atraumatically lifting a corneal flap or cap during corneal lamellar surgery comprising providing a corneal elevating instrument having a handle and an elevator head with a concave leading edge and an inclined top face extending vertically upward away from said edge and having a concave bottom surface for atraumatically engaging the corneal surface, placing said instrument at the edge of a corneal cap or flap incision, exposing said corneal flap or cap edge by inserting the elevator edge into the incision and atraumatically lifting said edge on said inclined top face, and peeling back said edge to provide said cap or flap.
Claim 17
Dependent Claim
30 words
The method according to claim 13 by placing said elevating instrument at the incision edge for lifting said corneal flap or cap in the temporal region of the corneal surface.
Claim 18
Dependent Claim
19 words
The method according to claim 13 wherein a forceps is used for peeling back said corneal flap or cap.
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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) | 2001-07-13 | 2002-01-12 | 2002-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-13 | 2006-01-12 | 2006-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-13 | 2010-01-12 | 2010-07-14 | $7700.00 | Window Closed / Lapsed |