US4077411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keratoplasty device
Assignee: Individual
•
Filing: 1976-04-06
•
Granted: 1978-03-07
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Expires: 1996-04-06
Abstract
Abstract Apparatus for aiding eye corneal tissue transplant including a "Teflon" base with a flat platform and a central semispherical post to which a ring or rings are spring-loaded to secure the donated corneal tissue from storage. The post has a fitting for receiving a liquid injector such as a hypodermic syringe and the fitting connects to a vertical conduit in the post that discharges at the top of the post beneath the position of the donor tissue on the post. Before the tissue is secured to the post a biologically harmless liquid is introduced into the conduit from the syringe to part the tissue from the post and protect the delicate underside or endothelium layer of the corneal tissue during the trephining of the transplant "button" from the secured donor tissue.
Inventors
- 👤 Donald E. Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:46
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/142; A61F9/00; A61F9/007; A61F9/013
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
Apparatus for corneal tissue keratoplasty for use with a liquid injector and comprising a work base, a work surface on the base adapted to retain a miniscus, a liquid conduit in the base opening at the work surface, means on the base adapted to receive a liquid injector, said means on the base connecting to the liquid conduit and said conduit discharging from the base, and means for securing tissue to the base about the conduit discharge at the work surface.
Claim 2
Dependent Claim
81 words
Apparatus for corneal tissue keratoplasty for use with a liquid injector and comprising a work base, a work surface on the base adapted to retain a miniscus, a liquid conduit in the base opening at the work surface, means on the base adapted to receive a liquid injector, said means on the base connecting to the liquid conduit and said conduit discharging from the base, and means for securing tissue to the base about the conduit discharge at the work surface.
Claim 3
Dependent Claim
22 words
Apparatus in accordance with claim 1 wherein said work base comprises a flat platform, and a central post projecting from the platform.
Claim 4
Dependent Claim
34 words
Apparatus in accordance with claim 2 wherein said work surface comprises a partly spherical area on said central post remote from said flat platform, said liquid conduit emerging centrally of said partly spherical area.
Claim 5
Dependent Claim
20 words
Apparatus in accordance with claim 2 further comprising a flat area on the work surface surrounding the liquid conduit discharge.
Claim 6
Dependent Claim
131 words
Apparatus for use with a liquid injector for supporting eye corneal tissue for keratoplasty and comprising a base, a post fixed to the base, a hold-down ring having an inner diameter less than the diameter of the work surface, spring means biasing the ring toward the work surface, a liquid conduit in the post terminating in a liquid conduit discharge at the central portion of the work surface, a work surface flat adapted to retain a miniscus and surrounding the liquid conduit discharge, a hypodermic needle communicating with the conduit and adapted to receive a liquid injecting syringe to conduct liquid from said syringe to the conduit in the post, means securing the needle with respect to the post, and attachment means releasably securing the post and needle to the base.
Claim 7
Dependent Claim
131 words
Apparatus for use with a liquid injector for supporting eye corneal tissue for keratoplasty and comprising a base, a post fixed to the base, a hold-down ring having an inner diameter less than the diameter of the work surface, spring means biasing the ring toward the work surface, a liquid conduit in the post terminating in a liquid conduit discharge at the central portion of the work surface, a work surface flat adapted to retain a miniscus and surrounding the liquid conduit discharge, a hypodermic needle communicating with the conduit and adapted to receive a liquid injecting syringe to conduct liquid from said syringe to the conduit in the post, means securing the needle with respect to the post, and attachment means releasably securing the post and needle to the base.
Claim 8
Dependent Claim
22 words
Apparatus in accordance with claim 5 wherein said means securing the needle to the post comprises a horizontal recess in the post.
Claim 9
Dependent Claim
50 words
Apparatus in accordance with claim 5 wherein said attachment means comprises a pin fixed to the needle, a pin recess in the base, a post recess in the base, a reduced diameter boss on the post seated in the post recess, and a fastener in the base engaging the post.
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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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |