Patent US581495A successfully refreshed from Google Patents.
Patent US4702737A successfully refreshed from Google Patents.
US4702737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual dose syringe
Assignee: Individual
•
Filing: 1986-07-14
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Granted: 1987-10-27
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Expires: 2006-07-14
Abstract
Abstract A multiple dose, single barrel syringe has a barrel comprising a plurality of telescoping sections of progressively decreasing diameter. A puncturable fluid tight membrane extending across the forward end of each barrel section except the first divides the interior of the barrel into a plurality of separate fluid receiving chambers, each of which may contain a different fluid medication. A plunger is slidably mounted in the last barrel section and extends exteriorly therefrom. At the forward end of the syringe is a hollow needle, which extends through a needle-receiving tubular conduit at the forward end of the first barrel section so that the needle is disposed partly inside and partly outside the barrel. Both ends of the needle are sharply pointed. The inner end of the needle punctures the membranes so that, as each chamber in the barrel is emptied, the next chamber is placed in communication with the needle.
Inventors
- 👤 Joanne L. Pizzino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:53
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/24; A61M5/2448; A61M5/31; A61M5/315; A61M5/31596; A61M2005/1787; A61M5/31598
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
167 words
A pre-filled multiple dose, single barrel syringe for dispensing at least two fluids in predetermined sequence, said syringe comprising: (a) a barrel comprising a plurality of telescoping sections of progressively decreasing diameter; (b) a thin puncturable fluid tight membrane extending across the forward end of each barrel section except the first and reciprocable therewith, said membrane dividing the interior of said barrel into a plurality of separate fluid-receiving chambers each of said chambers being pre-filled with a fluid; (c) a plunger received in the last barrel section and including a portion extending exteriorly of the barrel; (d) sealing means providing fluid tight seals between successive barrel sections and between the last barrel section and said plunger; (e) needle receiving means at the forward end of the first barrel section, and (f) a hollow meedle extending through said needle receiving means, said needle being sharply pointed at both ends, a portion of said needle being inside said barrel and a portion of said needle being outside said barrel.
Claim 2
Dependent Claim
167 words
A pre-filled multiple dose, single barrel syringe for dispensing at least two fluids in predetermined sequence, said syringe comprising: (a) a barrel comprising a plurality of telescoping sections of progressively decreasing diameter; (b) a thin puncturable fluid tight membrane extending across the forward end of each barrel section except the first and reciprocable therewith, said membrane dividing the interior of said barrel into a plurality of separate fluid-receiving chambers each of said chambers being pre-filled with a fluid; (c) a plunger received in the last barrel section and including a portion extending exteriorly of the barrel; (d) sealing means providing fluid tight seals between successive barrel sections and between the last barrel section and said plunger; (e) needle receiving means at the forward end of the first barrel section, and (f) a hollow meedle extending through said needle receiving means, said needle being sharply pointed at both ends, a portion of said needle being inside said barrel and a portion of said needle being outside said barrel.
Claim 3
Dependent Claim
14 words
A syringe according to claim 1 in which said barrel has two telescoping sections.
Claim 4
Dependent Claim
14 words
A syringe according to claim 1 in which said membrane is a plastic member.
Claim 5
Dependent Claim
17 words
A syringe according to claim 1 in which said membrane is integrally joined to said barrel section.
Claim 6
Dependent Claim
23 words
A syringe according to claim 4 in which said sealing means comprises a sealing ring and a groove in said barrel section therefor.
Claim 7
Dependent Claim
29 words
A syringe according to claim 1 in which said sealing means includes a snap ring removably secured to said barrel section, said membrane being integral with said snap ring.
Claim 8
Dependent Claim
26 words
A syringe according to claim 1 in which the portion of the needle inside the barrel has an opening near the forward end of said barrel.
Claim 9
Dependent Claim
26 words
A syringe according to claim 7 in which the portion of said needle inside said barrel is of sufficient length to puncture each of said membranes.
Claim 10
Dependent Claim
19 words
A syringe according to claim 1 in which said needle receiving means comprises a tubular conduit of reduced diameter.
Claim 11
Dependent Claim
25 words
A syringe according to claim 9 in which said needle has a hub joined thereto and said hub is received in said needle receiving means.
Claim 12
Dependent Claim
23 words
A syringe according to claim 10 in which said needle receiving means is externally screw threaded and said hub is internally screw threaded.
Claim 13
Dependent Claim
19 words
A syringe according to claim 1 in which said barrel sections are made of transparent or translucent plastic material.
Claim 14
Dependent Claim
10 words
A syringe according to claim 1, said syringe being disposable.
Claim 15
Dependent Claim
18 words
A syringe according to claim 1 in which said needle is fixedly positioned with respect to said barrel.
Claim 16
Dependent Claim
21 words
A syringe according to claim 1 in which the thickness of said membrane is in the order of about 0.002 inch.
References Cited (Backward Citations)
US2453591A
Cited
US2939459A
Cited
US3911916A
Cited
US3923058A
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US3946732A
Cited
US4171698A
Cited
US4313440A
Cited
US4424057A
Cited
US4439184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |