US3585984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood transfer device
Assignee: Parke Davis and Co LLC
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Filing: 1968-04-10
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Granted: 1971-06-22
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Expires: 1988-04-10
Abstract
Abstract A blood transfer device for veni-puncture and the like is provided having a double-pointed cannula, a main chamber for loading and reloading cartridges, and a pilot chamber separated from the main chamber by a resilient collapsible cannula sheath. When the device is used and the cannula is correctly positioned as for veni-puncture, the blood enters the cannula and flows into the pilot chamber through certain aperture means between the cannula and the pilot chamber enabling the operator to confirm visually by the presence of a substantial sample that the placement is correct. One injection serves for the loading and filling of several cartridges, as desired, without spilling of blood between loadings and with minimum risk of exposure to contamination, etc.
Inventors
- 👤 Robert A Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:12
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/15; A61B5/150007; A61B5/150015; A61B5/15003; A61B5/150206; A61B5/150221; A61B5/150259; A61B5/150351; A61B5/150374; A61B5/150381; A61B5/150389; A61B5/150473; A61B5/150488; A61B5/150534; A61B5/150572; A61B5/153; A61B5/154; A61B5/1545; A61B5/155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
253 words
A blood transfer device comprising: a holder including a hub, a neck and an axially extending main chamber adapted to receive a cartridge; a cannula having piercing outer and inner ends; means for mounting the inner end of the cannula in axial alignment within the holder for piercing contact with a cartridge inserted in the holder; pierceable sheath means adapted in a first position to enclose the inner end of the cannula aNd sealingly prevent blood in the cannula from entering the main chamber and further adapted in a second position with a cartridge inserted in said piercing contact in the holder to be pierced by the inner end of the cannula and to expose the same for fluid transfer with respect to the cartridge, the sheath means being fixedly mounted by collar means within the neck and being resilient such that upon withdrawal of a cartridge from the main chamber the sheath means flexes back to said first position and reseals; a pilot chamber defined by the hub, neck and collar means, the pilot chamber being separate from the main chamber and including light-transmissive wall means for viewing the presence of blood collected in the pilot chamber; and aperture means including an opening in the cannula wall between the ends of the cannula, the opening being in direct communication with the pilot chamber whereby, prior to insertion of a cartridge, blood under tension entering the outer end of the cannula has direct access for distribution to the pilot chamber for visual observation.
Claim 2
Dependent Claim
253 words
A blood transfer device comprising: a holder including a hub, a neck and an axially extending main chamber adapted to receive a cartridge; a cannula having piercing outer and inner ends; means for mounting the inner end of the cannula in axial alignment within the holder for piercing contact with a cartridge inserted in the holder; pierceable sheath means adapted in a first position to enclose the inner end of the cannula aNd sealingly prevent blood in the cannula from entering the main chamber and further adapted in a second position with a cartridge inserted in said piercing contact in the holder to be pierced by the inner end of the cannula and to expose the same for fluid transfer with respect to the cartridge, the sheath means being fixedly mounted by collar means within the neck and being resilient such that upon withdrawal of a cartridge from the main chamber the sheath means flexes back to said first position and reseals; a pilot chamber defined by the hub, neck and collar means, the pilot chamber being separate from the main chamber and including light-transmissive wall means for viewing the presence of blood collected in the pilot chamber; and aperture means including an opening in the cannula wall between the ends of the cannula, the opening being in direct communication with the pilot chamber whereby, prior to insertion of a cartridge, blood under tension entering the outer end of the cannula has direct access for distribution to the pilot chamber for visual observation.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |