US4240428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented syringe locking sleeve
Assignee: Allegiance Corp
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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 hypodermic syringe with a thermoplastic syringe barrel having an integral locking sleeve at its forward end. The locking sleeve has a slot construction positioned relative to the barrel's front end to enhance mold release flexing of the sleeve during formation and firm locking control on a hypodermic needle or the like during use.
Inventors
- 👤 David S. Akhavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:08
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/34; A61M5/347
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A thermoplastic syringe barrel with a front wall integrally joined to a circumferentially interrupted locking sleeve with internal threads, wherein the improvement comprises: said sleeve having at least one slot that extends to within 0.050 inch of the barrel's front wall to enhance mold release flexing of the sleeve for axial strip ejection from a mold during formation and firm locking control during use.
Claim 2
Dependent Claim
64 words
A thermoplastic syringe barrel with a front wall integrally joined to a circumferentially interrupted locking sleeve with internal threads, wherein the improvement comprises: said sleeve having at least one slot that extends to within 0.050 inch of the barrel's front wall to enhance mold release flexing of the sleeve for axial strip ejection from a mold during formation and firm locking control during use.
Claim 3
Dependent Claim
18 words
A syringe barrel as set forth in claim 1, wherein the slot extends to the barrel's front wall.
Claim 4
Dependent Claim
16 words
A syringe barrel as set forth in claim 1, wherein there are a plurality of slots.
Claim 5
Dependent Claim
34 words
A syringe barrel as set forth in claim 1, wherein the sleeve has a flexible wall and there is at least one upstanding longitudinal rib extending along an external surface of the sleeve's wall.
Claim 6
Dependent Claim
19 words
A syringe barrel as set forth in claim 1, wherein the wall is from 0.030 to 0.045 inch thick.
Claim 7
Dependent Claim
33 words
A syringe barrel as set forth in claim 1, wherein the retaining sleeve can withstand approximately 30 inch-ounce torqued on a standard two eared needle hub before losing a grip on such hub.
Claim 8
Dependent Claim
63 words
A medical device with a front wall integrally joined to a circumferentially interrupted locking sleeve with internal threads, wherein the improvement comprises: said sleeve having at least one slot that extends to within 0.050 inch of the device's front wall to enhance mold release flexing of the sleeve for axial strip ejection from a mold during formation and firm locking control during use.
Claim 9
Dependent Claim
63 words
A medical device with a front wall integrally joined to a circumferentially interrupted locking sleeve with internal threads, wherein the improvement comprises: said sleeve having at least one slot that extends to within 0.050 inch of the device's front wall to enhance mold release flexing of the sleeve for axial strip ejection from a mold during formation and firm locking control during use.
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 |