Patent US4543088A successfully refreshed from Google Patents.
US4543088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-sealing subcutaneous injection site
Assignee: American Hospital Supply Corp
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Filing: 1983-11-07
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Granted: 1985-09-24
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Expires: 2003-11-07
Abstract
Abstract A self-sealing subcutaneous injection site for implantation in the body includes a housing having a bottom wall and a generally resilient dome-shaped wall which defines an interior chamber within the housing. The interior chamber has a durometer and shape for providing compressive forces within the dome-shaped wall for sealing punctures extending through the dome-shaped wall upon fluid pressurization of the interior chamber. A conduit extends through the dome-shaped wall into the interior chamber to provide a fluid-flow passageway to the chamber.
Inventors
- 👤 Matthew W. Bootman
- 👤 Ronald K. Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/0208; A61M2039/0036; A61M2039/0072; A61M2205/00; A61M2205/32
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
81 words
A self-sealing subcutaneous injection site comprising: a housing having a bottom wall and a resilient, generally dome-shaped wall defining an interior chamber, which interior chamber has a convex upper wall formed by a portion of the dome-shaped wall for providing compressive forces within such upper wall for sealing punctures through the upper wall upon fluid pressurization of such interior chamber; and a conduit extending through the dome-shaped wall into the interior chamber for providing a fluid-flow passageway to the interior chamber.
Claim 2
Dependent Claim
81 words
A self-sealing subcutaneous injection site comprising: a housing having a bottom wall and a resilient, generally dome-shaped wall defining an interior chamber, which interior chamber has a convex upper wall formed by a portion of the dome-shaped wall for providing compressive forces within such upper wall for sealing punctures through the upper wall upon fluid pressurization of such interior chamber; and a conduit extending through the dome-shaped wall into the interior chamber for providing a fluid-flow passageway to the interior chamber.
Claim 3
Dependent Claim
20 words
A self-sealing subcutaneous injection site as recited in claim 1 wherein the sidewall is constructed of a non-elongating resilient material.
Claim 4
Dependent Claim
47 words
A self-sealing subcutaneous injection site as recited in claim 1 wherein the interior chamber further comprises a convex-shaped chamber sidewall formed by a portion of the dome-shaped wall for providing compressive forces within the chamber sidewall for sealing punctures extending therethrough upon fluid pressurization of such chamber.
Claim 5
Dependent Claim
20 words
A self-sealing subcutaneous injection site as recited in claim 1 wherein the housing includes a generally flat upper, outer surface.
Claim 6
Dependent Claim
18 words
A self-sealing subcutaneous injection site as recited in claim 1 wherein the resilient dome-shaped wall comprises silicone elastomer.
Claim 7
Dependent Claim
19 words
A self-sealing subcutaneous injection site as recited in claim 1 wherein the housing is constructed of a silicone elastomer.
Claim 8
Dependent Claim
32 words
A self-sealing subcutaneous injection site as recited in claim 1 further comprising a needle guard extending along the bottom wall of the housing and at least partially positioned in the inner chamber.
Claim 9
Dependent Claim
26 words
A self-sealing subcutaneous injection site as recited in claim 1 wherein the bottom wall of the housing is constructed of a material impenetrable by a needle.
Claim 10
Dependent Claim
33 words
A self-sealing subcutaneous injection site as recited in claim 1 further comprising reinforcing cuff means extending around and imbedded in the resilient dome-shaped wall for reducing hoop strain in the resilient dome-shaped wall.
Claim 11
Dependent Claim
20 words
A self-sealing subcutaneous injection site as recited in claim 1 wherein the reinforcing cuff means comprises a Dacron mesh cuff.
Claim 12
Dependent Claim
34 words
A self-sealing subcutaneous injection site as recited in claim 1 further comprising a peripherally extending flange portion on the housing, which flange portion includes means for securing the housing within and to a patient.
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) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |