Patent US4240424A successfully refreshed from Google Patents.
US4240424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syringe locking sleeve
Assignee: Baxter International Inc
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Filing: 1978-10-23
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Granted: 1980-12-23
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Expires: 1998-10-23
Abstract
Abstract A syringe barrel with an integral laterally flexible locking sleeve with peripheral segmenting slots and a series of integral longitudinal spring ribs on an outer surface of the flexible sleeve.
Inventors
- 👤 David S. Akhavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:59
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/34; A61M5/347
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
68 words
A thermoplastic syringe barrel with an integral laterally flexible thermoplastic locking member having a longitudinal axis, wherein the improvement comprises: an inner retention portion of the locking member for securing a needle or the like to the barrel; and at least one longitudinally extending outer spring rib integral with the retention portion said rib adapted to flex outwardly during strip ejection and without unscrewing during the molding process.
Claim 2
Dependent Claim
68 words
A thermoplastic syringe barrel with an integral laterally flexible thermoplastic locking member having a longitudinal axis, wherein the improvement comprises: an inner retention portion of the locking member for securing a needle or the like to the barrel; and at least one longitudinally extending outer spring rib integral with the retention portion said rib adapted to flex outwardly during strip ejection and without unscrewing during the molding process.
Claim 3
Dependent Claim
25 words
A syringe as set forth in claim 1, wherein the locking member is a sleeve with at least one longitudinal slot peripherally segmenting the sleeve.
Claim 4
Dependent Claim
18 words
A syringe as set forth in claim 1, wherein there are a series of longitudinally extending spring ribs.
Claim 5
Dependent Claim
28 words
A syringe as set forth in claim 1, wherein the spring rib has a rear end joined to the barrel and a forward end spaced from the barrel.
Claim 6
Dependent Claim
24 words
A syringe as set forth in claim 1, wherein the barrel and locking member's inner retention portion and spring rib are of one-piece polypropylene.
Claim 7
Dependent Claim
22 words
A syringe as set forth in claim 1, wherein the locking member is a peripherally segmented sleeve having integral internal thermoplastic threads.
Claim 8
Dependent Claim
63 words
A medical device with a thermoplastic locking sleeve having a longitudinal axis and being integrally formed with and surrounding a hollow adapter, wherein the improvement comprises: an inner retention portion of the sleeve; and at least one longitudinally extending outer spring rib integral with the retention portion said rib adapted to flex outwardly during strip ejection and without unscrewing during the molding process.
Claim 9
Dependent Claim
63 words
A medical device with a thermoplastic locking sleeve having a longitudinal axis and being integrally formed with and surrounding a hollow adapter, wherein the improvement comprises: an inner retention portion of the sleeve; and at least one longitudinally extending outer spring rib integral with the retention portion said rib adapted to flex outwardly during strip ejection and without unscrewing during the molding process.
Claim 10
Dependent Claim
95 words
A thermoplastic syringe barrel with an integral laterally flexible thermoplastic locking member, wherein the improvement comprises: an inner retention portion of the locking member for securing a needle or the like to the barrel; at least one outer spring rib integral with these retention portions; said spring rib having a rear end joined to the barrel and a forward end spaced from the barrel; and this rib is substantially thicker at its rear end than at its forward end said rib adapted to flex outwardly during strip ejection and without unscrewing during the molding process.
Claim 11
Dependent Claim
95 words
A thermoplastic syringe barrel with an integral laterally flexible thermoplastic locking member, wherein the improvement comprises: an inner retention portion of the locking member for securing a needle or the like to the barrel; at least one outer spring rib integral with these retention portions; said spring rib having a rear end joined to the barrel and a forward end spaced from the barrel; and this rib is substantially thicker at its rear end than at its forward end said rib adapted to flex outwardly during strip ejection and without unscrewing during the molding process.
Claim 12
Dependent Claim
21 words
A syringe as set forth in claim 8, wherein the rib progressively tapers from its rear end towards its forward end.
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) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |