Patent US1734917A successfully refreshed from Google Patents.
US5354285A
Expired / Lapsed
US
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Injection syringe
Assignee: Individual
•
Filing: 1993-08-30
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Granted: 1994-10-11
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Expires: 2013-08-30
Abstract
Abstract The injection syringe which is particularly used for medical purposes. The syringe has a body, a piston which is disposed in the syringe body for displacement therein and an injection needle. The piston has at least two piston elements, 3 which are displaceable in relation to each other along the longitudinal axis of the syringe body.
Inventors
- 👤 Sergej M. Mazurik
- 👤 Andrej N. Sokolov
- 👤 Marat M. Kashlykov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:36
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31596; A61M5/31511; A61M5/31525; A61M5/31531; A61M5/31598
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
288 words
A syringe comprising: a tubular body having a first longitudinal axis, a first inner diameter and a first gradation on a side of the tubular body; a first cylindrical piston disposed within the tubular body and having a first end, a second end and a central channel passing through the first cylindrical piston from the first end to the second end, the central channel having a second inner diameter, the first cylindrical piston having a second longitudinal axis substantially aligned with the first longitudinal axis and a second gradation on a side of the first cylindrical piston; a first piston element coupled to the first end of the first cylindrical piston and having a first outer diameter corresponding to the first inner diameter of the tubular body, wherein the first cylindrical piston and the first piston element are displaceable within the tubular body in a direction along the first longitudinal axis with displacement indicated by a position of the first piston element with respect to the first gradation on the side of the tubular body; a second cylindrical piston disposed within the central channel of the first cylindrical piston and having a first end, a second end, and a third longitudinal axis substantially aligned with the first longitudinal axis; and a second piston element coupled to the first end of the second cylindrical piston and having a second outer diameter corresponding to the second inner diameter of the central channel, wherein the second cylindrical piston and second piston element are displaceable within the central channel in a direction along the first longitudinal axis with displacement indicated by a position of the second piston element with respect to the second gradation on the side of the first cylindrical piston.
Claim 2
Dependent Claim
288 words
A syringe comprising: a tubular body having a first longitudinal axis, a first inner diameter and a first gradation on a side of the tubular body; a first cylindrical piston disposed within the tubular body and having a first end, a second end and a central channel passing through the first cylindrical piston from the first end to the second end, the central channel having a second inner diameter, the first cylindrical piston having a second longitudinal axis substantially aligned with the first longitudinal axis and a second gradation on a side of the first cylindrical piston; a first piston element coupled to the first end of the first cylindrical piston and having a first outer diameter corresponding to the first inner diameter of the tubular body, wherein the first cylindrical piston and the first piston element are displaceable within the tubular body in a direction along the first longitudinal axis with displacement indicated by a position of the first piston element with respect to the first gradation on the side of the tubular body; a second cylindrical piston disposed within the central channel of the first cylindrical piston and having a first end, a second end, and a third longitudinal axis substantially aligned with the first longitudinal axis; and a second piston element coupled to the first end of the second cylindrical piston and having a second outer diameter corresponding to the second inner diameter of the central channel, wherein the second cylindrical piston and second piston element are displaceable within the central channel in a direction along the first longitudinal axis with displacement indicated by a position of the second piston element with respect to the second gradation on the side of the first cylindrical piston.
Claim 3
Dependent Claim
16 words
A syringe according to claim 1, wherein the second gradation is finer than the first gradation.
Claim 4
Dependent Claim
48 words
A syringe according to claim 1, wherein the first gradation indicates displacement of the first cylindrical piston and the first piston element in 1 milliliter increments, and the second gradation indicates displacement of the second cylindrical piston and the second piston element in at least 0.05 milliliter increments.
Claim 5
Dependent Claim
346 words
A syringe comprising: a tubular body having a first end, a second end, a first longitudinal axis and a first inner diameter; a first cylindrical piston disposed within the tubular body and having a first end, a second end and a central channel passing through the first cylindrical piston from the first end to the second end, the central channel having a second inner diameter, the first cylindrical piston having a second longitudinal axis substantially aligned with the first longitudinal axis; a first piston element coupled to the first end of the first cylindrical piston and having a first outer diameter corresponding to the first inner diameter of the tubular body, wherein the first cylindrical piston and the first piston element are displaceable within the tubular body in a direction along the first longitudinal axis for changing a first volume within the tubular body defined by the first end and the inner diameter of the tubular body and a relative position of the first piston element with respect to the first end of the tubular body; a second cylindrical piston disposed within the central channel of the first cylindrical piston and having a first end, a second end, and a third longitudinal axis substantially aligned with the first longitudinal axis; a second piston element coupled to the first end of the second cylindrical piston and having a second outer diameter corresponding to the second inner diameter of the central channel, wherein the second cylindrical piston and second piston element are displaceable within the central channel in a direction along the first longitudinal axis for changing a second volume within the central channel defined by the first end and the inner diameter of the first cylindrical piston and a relative position of the second piston element with respect to the first end of the first cylindrical piston; first gradation means formed on the side of the tubular body for indicating a change in the first volume; and second gradation means formed on the side of the first cylindrical piston for indicating a change in the second volume.
Claim 6
Dependent Claim
346 words
A syringe comprising: a tubular body having a first end, a second end, a first longitudinal axis and a first inner diameter; a first cylindrical piston disposed within the tubular body and having a first end, a second end and a central channel passing through the first cylindrical piston from the first end to the second end, the central channel having a second inner diameter, the first cylindrical piston having a second longitudinal axis substantially aligned with the first longitudinal axis; a first piston element coupled to the first end of the first cylindrical piston and having a first outer diameter corresponding to the first inner diameter of the tubular body, wherein the first cylindrical piston and the first piston element are displaceable within the tubular body in a direction along the first longitudinal axis for changing a first volume within the tubular body defined by the first end and the inner diameter of the tubular body and a relative position of the first piston element with respect to the first end of the tubular body; a second cylindrical piston disposed within the central channel of the first cylindrical piston and having a first end, a second end, and a third longitudinal axis substantially aligned with the first longitudinal axis; a second piston element coupled to the first end of the second cylindrical piston and having a second outer diameter corresponding to the second inner diameter of the central channel, wherein the second cylindrical piston and second piston element are displaceable within the central channel in a direction along the first longitudinal axis for changing a second volume within the central channel defined by the first end and the inner diameter of the first cylindrical piston and a relative position of the second piston element with respect to the first end of the first cylindrical piston; first gradation means formed on the side of the tubular body for indicating a change in the first volume; and second gradation means formed on the side of the first cylindrical piston for indicating a change in the second volume.
Claim 7
Dependent Claim
21 words
A syringe according to claim 4, wherein the second gradation means indicates finer changes in volume than the first gradation means.
Claim 8
Dependent Claim
34 words
A syringe according to claim 4, wherein the first gradation means indicates changes in volume in 1 milliliter increments, and the second gradation means indicates changes in volume in at least 0.05 milliliter increments.
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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) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |