US3889674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing syringe
Assignee: Individual
•
Filing: 1973-11-30
•
Granted: 1975-06-17
•
Expires: 1993-11-30
Abstract
Abstract This invention comprises a mixing syringe which has a chamber in both the barrel portion and plunger portion of the syringe. One component to be mixed is placed into the plunger chamber, the plunger slideably inserted into the syringe barrel and rotatably oriented so that the barrel and plunger chambers are not in alignment. At the time of use, a second component is drawn into the syringe, the plunger rotated to align the plunger and barrel chambers, and the plunger withdrawn until the components come into contact and mix.
Inventors
- 👤 Constabile A Cilento
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:16
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31596
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
117 words
A syringe capable of storing and mixing substances comprising a barrel having a nipple opening at one end, a plunger receiving opening at the other end, and a chamber formed on the surface of said barrel by the outward protrusion of a section of said surface; a plunger slidably disposed within said barrel, said plunger having seals on an upper and lower portion and between said seals a chamber formed in said plunger by the inward intrusion of a section of the surface of the plunger surface, said plunger being rotatable in said barrel to align said outward protrusion and said inward intrusion to form a single chamber for mixing of a substance contained within the syringe.
Claim 2
Dependent Claim
117 words
A syringe capable of storing and mixing substances comprising a barrel having a nipple opening at one end, a plunger receiving opening at the other end, and a chamber formed on the surface of said barrel by the outward protrusion of a section of said surface; a plunger slidably disposed within said barrel, said plunger having seals on an upper and lower portion and between said seals a chamber formed in said plunger by the inward intrusion of a section of the surface of the plunger surface, said plunger being rotatable in said barrel to align said outward protrusion and said inward intrusion to form a single chamber for mixing of a substance contained within the syringe.
Claim 3
Dependent Claim
28 words
A syringe as in claim 1 wherein said outward protrusion on said barrel is a longitudinal shaped section comprising up to half of the circumference of said barrel.
Claim 4
Dependent Claim
28 words
A syringe as in claim 2 wherein said inward intrusion on said plunger is a longitudinal shaped section comprising up to half of the circumference of said plunger.
Claim 5
Dependent Claim
20 words
A syringe as in claim 3 wherein said barrel chamber and said plunger chamber when aligned form a symmetrical chamber.
Claim 6
Dependent Claim
14 words
A syringe as in claim 4 wherein said symmetrical chamber is ellipsoidal in shape.
Claim 7
Dependent Claim
29 words
A syringe as in claim 1 wherein there is a cap seal on said barrel at said inlet-Outlet opening whereby the internal surfaces of said syringe are maintained antiseptic.
Claim 8
Dependent Claim
23 words
A syringe as in claim 1 wherein a solid substance is contained within said chamber formed by said inward intrusion on said plunger.
Claim 9
Dependent Claim
16 words
A syringe as in claim 1 wherein said barrel at said nipple opening has a cannula.
Claim 10
Independent Claim
124 words
A method of mixing at least two substances using a syringe comprising: a. providing a syringe having an outward protruding chamber on the barrel portion and an inward intruding chamber on the plunger portion, said plunger being rotatable within and sealing against said barrel portion; b. inserting a first substance into the chamber on said plunger and aligning said plunger so that said plunger chamber is not in alignment with the chamber on said barrel portion; c. drawing a second substance up into the barrel; d. rotating said plunger so that said plunger chamber and said barrel chamber are in alignment; and e. withdrawing said plunger from said barrel a sufficient distance such that the plunger allows mixing of said first and second substances.
Claim 11
Independent Claim
124 words
A method of mixing at least two substances using a syringe comprising: a. providing a syringe having an outward protruding chamber on the barrel portion and an inward intruding chamber on the plunger portion, said plunger being rotatable within and sealing against said barrel portion; b. inserting a first substance into the chamber on said plunger and aligning said plunger so that said plunger chamber is not in alignment with the chamber on said barrel portion; c. drawing a second substance up into the barrel; d. rotating said plunger so that said plunger chamber and said barrel chamber are in alignment; and e. withdrawing said plunger from said barrel a sufficient distance such that the plunger allows mixing of said first and second substances.
Claim 12
Dependent Claim
30 words
A method of mixing as in claim 9 wherein during step (e) said syringe is maintained in an upwardly pointing orientation with said plunger being drawn downwardly from said barrel.
Claim 13
Dependent Claim
31 words
A method of mixing as in claim 10 wherein after step (e) said syringe is pointed downwardly whereby the mixed substances occupy a space in said syringe adjacent the nipple opening.
Claim 14
Dependent Claim
20 words
A method of mixing as in claim 11 wherein said plunger is slid downwardly until it contacts said mixed substances.
Claim 15
Dependent Claim
22 words
A method of mixing as in claim 12 wherein said first substance is a solid and said second substance is a liquid.
Claim 16
Dependent Claim
22 words
A method of mixing as in claim 9 wherein said first substance is a solid and said second substance is a liquid.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |