Patent US4091811A successfully refreshed from Google Patents.
US4091811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Needle cover
Assignee: Baxter International Inc
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Filing: 1976-11-15
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Granted: 1978-05-30
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Expires: 1996-11-15
Abstract
Abstract A needle cover for a blood collection needle or the like comprises a first sleeve positioned about a pointed hypodermic needle. The first sleeve is removably carried by a hub, which also carries the needle. In accordance with this invention an inner sleeve is provided, positioned within the first sleeve and about the point of the needle. The inner sleeve is free of mechanical attachment to the first sleeve so that, upon rotation of the outer sleeve for its removal from the hub, the inner sleeve does not rotate with the first sleeve. Accordingly, the danger of the pointed needle scouring out and retaining bits of plastic from the sleeve is eliminated.
Inventors
- 👤 David A. Bates
- 👤 Angelo T. Capritta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:02
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3202; A61M2005/3103; A61M2005/3107; A61M2005/3109; A61M2005/3117; A61M2005/3118; A61M2005/312
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
In a needle cover which comprises a first sleeve positioned about a pointed hypodermic needle, said first sleeve being removably carried by a hub which also carries said needle, the improvement comprising, in combination: an inner sleeve positioned within said first sleeve and about the point of said needle, said inner sleeve being free of mechanical attachment to said first sleeve, and means connecting said first sleeve to said hub, whereby, upon rotation of said first sleeve for removal thereof, said inner sleeve does not rotate with said first sleeve.
Claim 2
Dependent Claim
90 words
In a needle cover which comprises a first sleeve positioned about a pointed hypodermic needle, said first sleeve being removably carried by a hub which also carries said needle, the improvement comprising, in combination: an inner sleeve positioned within said first sleeve and about the point of said needle, said inner sleeve being free of mechanical attachment to said first sleeve, and means connecting said first sleeve to said hub, whereby, upon rotation of said first sleeve for removal thereof, said inner sleeve does not rotate with said first sleeve.
Claim 3
Dependent Claim
26 words
The needle cover of claim 1 in which the inner end of said first sleeve defines a constriction sufficient to prevent passage of said inner sleeve.
Claim 4
Dependent Claim
50 words
The needle cover of claim 2 in which said first sleeve carries a plug occluding its outer end, and said inner sleeve defines a closed outer end, the inner end of said plug and the outer end of said inner sleeve each defining a separate shape permitting singlepoint contact therebetween.
Claim 5
Dependent Claim
30 words
The needle cover of claim 3 in which said first sleeve is integrally attached to said hub by a thin, frangible neck portion, breakable on rotation of said first sleeve.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |