Patent US3990445A successfully refreshed from Google Patents.
US3990445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drug injection device
Assignee: Valleylab Inc
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Filing: 1975-01-03
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Granted: 1976-11-09
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Expires: 1995-01-03
Abstract
Abstract A drug injection device (or what some might prefer to call a "drug injection site") comprises a doubled wall, doughnut-shaped cylinder adapted to be inserted into an intravenous delivery tube. Preferably it is made of a pair of identically shaped elements having an outer end an inner circular wall, both of which, when the two elements are placed together in opposed relationship, form continuous walls of a doughnut or O-ring shape. The interior of the doughnut is filled with a soft surgical grade rubber which, when under compression, permits ready insertion of a hypodermic needle therethrough but which, when the needle is withdrawn, is self-sealing. A plurality of radially aligned apertures, or windows, are provided in the inner and outer walls, so that the hypodermic needle can be inserted through the outer wall, through the rubber sealing element and then through the aligned window in the inner wall. Preferably, the windows are three in number, equally spaced around the circumference of the device, so that when a needle is inserted through the respective windows and the rubber sealing element, it will be stopped by an opposing wall of the inner solid surface of the inner wall of the device.
Inventors
- 👤 Ingemar H. Lundquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:19
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A drug injection device for insertion into an intravenous feeding tube comprising: a hollow-doughnut shaped casing having an outer wall and an inner wall and first and second faces, said casing forming a chamber which decreases in thickness from the inner wall to the outer wall, an inlet nipple provided on the first face of the casing and an outlet nipple formed on the second face of the casing, said inlet and outlet nipples being in unobstructed communication one with the other through a conduit formed by the inner wall, self-sealing rubber-like material filling the chamber between the inner and outer walls of said casing and a radially aligned window in the outer and inner walls of said device.
Claim 2
Dependent Claim
119 words
A drug injection device for insertion into an intravenous feeding tube comprising: a hollow-doughnut shaped casing having an outer wall and an inner wall and first and second faces, said casing forming a chamber which decreases in thickness from the inner wall to the outer wall, an inlet nipple provided on the first face of the casing and an outlet nipple formed on the second face of the casing, said inlet and outlet nipples being in unobstructed communication one with the other through a conduit formed by the inner wall, self-sealing rubber-like material filling the chamber between the inner and outer walls of said casing and a radially aligned window in the outer and inner walls of said device.
Claim 3
Dependent Claim
188 words
In a drug injection device for connection into an intravenous feeding tube, a two-part casing, each of said parts having an inner tubular portion and an outer dish-shaped portion surrounding the inner tubular portion, said inner tubular portion and said outer dish-shaped portion providing an annular space therebetween, means for fastening said two-part casing into a unitary assembly, said outer dish-shaped portions being in contact with each other when said two parts are fastened together a body of self-sealing rubber-like material disposed in said annular recesses in said two parts, said inner tubular portions being in contact and in registration with each other when said two parts are fastened together to provide a flow passage extending through the casing, the outer ends of said inner tubular portions being adapted to be connected into the intravenous feeding tube, said inner tubular portions having at least one opening therein which is covered by the body, said dish-shaped portions having at least one window therein in general alignment with the opening in the tubular portions whereby said window and said opening in combination with the body serve as an injection site.
Claim 4
Dependent Claim
188 words
In a drug injection device for connection into an intravenous feeding tube, a two-part casing, each of said parts having an inner tubular portion and an outer dish-shaped portion surrounding the inner tubular portion, said inner tubular portion and said outer dish-shaped portion providing an annular space therebetween, means for fastening said two-part casing into a unitary assembly, said outer dish-shaped portions being in contact with each other when said two parts are fastened together a body of self-sealing rubber-like material disposed in said annular recesses in said two parts, said inner tubular portions being in contact and in registration with each other when said two parts are fastened together to provide a flow passage extending through the casing, the outer ends of said inner tubular portions being adapted to be connected into the intravenous feeding tube, said inner tubular portions having at least one opening therein which is covered by the body, said dish-shaped portions having at least one window therein in general alignment with the opening in the tubular portions whereby said window and said opening in combination with the body serve as an injection site.
Claim 5
Dependent Claim
48 words
A device as in claim 2 wherein a plurality of circumferentially spaced openings are provided in the tubular portions and which are covered by said body and wherein said dish-shaped portions are provided with a plurality of windows in general alignment with the openings in the tubular portions.
Claim 6
Dependent Claim
34 words
A device as in claim 3 wherein said openings in the tubular portions are spaced in such a manner so that wall portions of the tubular portions are immediately opposite each of the openings.
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) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |