Patent US1992210A successfully refreshed from Google Patents.
Patent US4377897A successfully refreshed from Google Patents.
US4377897A
Expired / Lapsed
US
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Ophthalmic needle and method for manufacturing the same
Assignee: OCULAR ASSOCIATES A PARTNERSHIP OF FL
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Filing: 1981-08-04
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Granted: 1983-03-29
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Expires: 2001-08-04
Abstract
Abstract An improved ophthalmic needle and method for manufacturing the same for use with an ophthalmic instrument for extracapsular removal of a cataract. The needle comprises a coaxial tube portion, a separated tube portion, and a tank portion, interposed therebetween for flow conversion purposes. A metal-to-metal seal is effectuated between tubes at the coaxial portion by a spinning method employing a forming die in conjunction with a lathe. A unique use of fixtures is employed to properly orient the various tubes with respect to the tank and to effectuate joint sealing.
Inventors
- 👤 Daniel M. Eichenbaum
- 👤 Gerald Martin
- 👤 Paul Rehkopf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:33
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/00736; B; B23; B23P; B23P15/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
216 words
A method manufacturing an ophthalmic needle having a first portion comprising a first tube positioned within and extending from a second tube, a second portion having side-by-side tubes with one of said tubes being an extension of said first tube and the other being a third tube, and a third portion comprising a fourth tube interposed between said first and said second portions, said fourth tube having a first end which is located at a first end of said second tube and having a second end having said first tube extending therethrough and is located at a first end of said third tube, including the steps of: (a) sealing said first end of said second tube to said first end of said fourth tube; (b) bending said first tube away from the axial centerline of said fourth tube thereby creating a space between said first tube and the first end of said third tube, and approximately equal spaces between the inner diameter of said fourth tube and the outer diameter of said first tube and between the inner diameter of said fourth tube and the outer diameter of said third tube, at the second end of said fourth tube; (c) sealing said first tube, said third tube and said fourth tube at the second end thereof.
Claim 2
Independent Claim
216 words
A method manufacturing an ophthalmic needle having a first portion comprising a first tube positioned within and extending from a second tube, a second portion having side-by-side tubes with one of said tubes being an extension of said first tube and the other being a third tube, and a third portion comprising a fourth tube interposed between said first and said second portions, said fourth tube having a first end which is located at a first end of said second tube and having a second end having said first tube extending therethrough and is located at a first end of said third tube, including the steps of: (a) sealing said first end of said second tube to said first end of said fourth tube; (b) bending said first tube away from the axial centerline of said fourth tube thereby creating a space between said first tube and the first end of said third tube, and approximately equal spaces between the inner diameter of said fourth tube and the outer diameter of said first tube and between the inner diameter of said fourth tube and the outer diameter of said third tube, at the second end of said fourth tube; (c) sealing said first tube, said third tube and said fourth tube at the second end thereof.
Claim 3
Dependent Claim
22 words
The method of claim 1 including the step of sealing said first, second, and third tubes to said fourth tube by soldering.
Claim 4
Dependent Claim
41 words
The method of claim 2 including the step of sealing the second end of said second tube to said first tube extending therefrom by swagging the second end of said second tube down onto said first tube forming a metal-to-metal seal.
References Cited (Backward Citations)
US3085573A
Cited
US3532476A
Cited
US3819150A
Cited
US4041947A
Cited
US3986240A
Cited
US3929126A
Cited
US3994297A
Cited
US4037599A
Cited
US4069814A
Cited
US4114625A
Cited
US4299221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |