Patent US2551466A successfully refreshed from Google Patents.
US4037604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artifical biological drainage device
Assignee: SOUTH SHORE BANK A TRUST Co OF MA
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Filing: 1976-01-05
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Granted: 1977-07-26
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Expires: 1996-01-05
Abstract
Abstract A tube for implantation in an animal organ or cavity, for example, an eye, communicates with the anterior chamber of the eye and terminates in a unilateral pressure dependent valve shunt positioned outside the anterior chamber. Lateral side arms secured to the tube provide fixation means to the eye.
Inventors
- 👤 John B. Newkirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:17
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/0014; A61F; A61F9/00; A61F9/007; A61F9/00781; A61M27/00; A61M27/002
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
An artificial biological drainage device such as an eye shunt, comprising: a. a plastic, body innocuous tubular body being sufficiently rigid to maintain its shape on being implanted in a human body and having two open ends; b. a soft, flexible tube contacting and peripherally secured to and telescoped over one end of said tubular body and having a soft, resilient closure forming a closed end for said tubular body, there being at least one slit in said closed end arranged to open outwardly providing a unidirectional valve for fluid above a predetermined pressure and arranged to close at a pressure slightly less than the opening pressure for maintaining fluid pressure in an eye at a generally predetermined level; and c. a crossarm secured to said tubular body for securing the same in an implanted position all said parts being innocuous to the tissues and fluids in a body and being of a size to be accommodated in implant in a small organ.
Claim 2
Dependent Claim
163 words
An artificial biological drainage device such as an eye shunt, comprising: a. a plastic, body innocuous tubular body being sufficiently rigid to maintain its shape on being implanted in a human body and having two open ends; b. a soft, flexible tube contacting and peripherally secured to and telescoped over one end of said tubular body and having a soft, resilient closure forming a closed end for said tubular body, there being at least one slit in said closed end arranged to open outwardly providing a unidirectional valve for fluid above a predetermined pressure and arranged to close at a pressure slightly less than the opening pressure for maintaining fluid pressure in an eye at a generally predetermined level; and c. a crossarm secured to said tubular body for securing the same in an implanted position all said parts being innocuous to the tissues and fluids in a body and being of a size to be accommodated in implant in a small organ.
Claim 3
Dependent Claim
25 words
A drainage device according to claim 1 wherein said tubular body has a free, pointed end and a square end telescoped in said flexible tube.
Claim 4
Dependent Claim
16 words
A drainage device according to claim 1 wherein said tubular body is an essentially rigid plastic.
Claim 5
Dependent Claim
19 words
A drainage device according to claim 1 wherein said device is covered by an innocuous, human body compatible covering.
Claim 6
Dependent Claim
31 words
A drainage device according to claim 1 adapted as an eye shunt wherein said tubular body is 1-3 mm long and said flexible tube is at least about 1-10 mm long.
Claim 7
Dependent Claim
21 words
A drainage device according to claim 5 wherein said tubular body is a nominal 2 mm tube with an opening therethrough.
Claim 8
Dependent Claim
15 words
A drainage device according to claim 5 wherein said crossarm is about 6 mm long.
Claim 9
Dependent Claim
29 words
A drainage device according to claim 1 wherein said at least one slit is crossed slits which extend only a short distance into the wall of said flexible tube.
Claim 10
Dependent Claim
25 words
A drainage device according to claim 1 wherein said closure is cylindrical and of a full diameter of the internal diameter of said flexible tube.
Claim 11
Dependent Claim
42 words
A drainage device according to claim 1 adapted as an eye shunt wherein said valve is arranged to open at a pressure of 10-25 mm Hg and to close at from 1-3 mm Hg less than the pressure necessary to open it.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |