US3890971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety syringe
Assignee: Individual
•
Filing: 1973-10-23
•
Granted: 1975-06-24
•
Expires: 1993-10-23
Abstract
Abstract A safety syringe for one-time use including a plunger which is permanently lockable by detent members and a slidable needle cap which is also permanently lockable by detents to prevent reuse.
Inventors
- 👤 Thomas A Leeson
- 👤 Mark Scott Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:52
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M5/321; A61M5/3243; A61M5/24; A61M5/3202; A61M5/50; A61M5/5013; A61M2005/2403; A61M2005/2411; A61M5/3245; A61M2005/3247
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
A lockable safety syringe, comprising: a barrel housing having a bore therethrough, said barrel housing bore being adapted at one end thereof to receive a container for medicine having a needle mounted therewith for protrusion outwardly from said barrel housing; a plunger mounted in said barrel housing bore at the other end thereof for slidable movement, said plunger being movable into said container for medicine for displacing medicine in said container outwardly through said needle; a protective cap mounted on said one end of said barrel housing over said needle; cap safety lock means for locking said protective cap over said needle to prevent reuse of said syringe; and plunger safety lock means for locking said plunger against movement to prevent reuse of said plunger whereby said plunger safety lock means cooperates with said cap safety lock means to prevent reuse of said syringe, said cap safety lock means and said plunger safety lock means being located within said housing so as to be inaccessible after locking each of said means.
Claim 2
Dependent Claim
171 words
A lockable safety syringe, comprising: a barrel housing having a bore therethrough, said barrel housing bore being adapted at one end thereof to receive a container for medicine having a needle mounted therewith for protrusion outwardly from said barrel housing; a plunger mounted in said barrel housing bore at the other end thereof for slidable movement, said plunger being movable into said container for medicine for displacing medicine in said container outwardly through said needle; a protective cap mounted on said one end of said barrel housing over said needle; cap safety lock means for locking said protective cap over said needle to prevent reuse of said syringe; and plunger safety lock means for locking said plunger against movement to prevent reuse of said plunger whereby said plunger safety lock means cooperates with said cap safety lock means to prevent reuse of said syringe, said cap safety lock means and said plunger safety lock means being located within said housing so as to be inaccessible after locking each of said means.
Claim 3
Dependent Claim
79 words
The structure set forth in claim 1, including: said plunger being movable from an initial position to a position further into said housing bore for injecting medicine into a person; said plunger further being movable further outwardly of said housing from said initial position to a lockable position; and said plunger safety lock means comprising detent means mounted with said plunger and housing bore to prevent movement of said plunger inwardly of said housing bore from said lockable position.
Claim 4
Dependent Claim
40 words
The structure set forth in claim 1, including: mount means mounting said protective cap for slidable movement from an initial position over said needle to a retracted position inwardly of said housing in which said needle is exposed for use.
Claim 5
Dependent Claim
32 words
The structure set forth in claim 3, including: said mount means mounting said protective cap for movement outwardly of said housing from said retracted position to a protective position over said needle.
Claim 6
Dependent Claim
34 words
The structure set forth in claim 4, including: said cap safety lock means locking said protective cap in said protective position against movement inwardly of said housing to prevent further exposure of said needle.
Claim 7
Dependent Claim
45 words
The structure set forth in claim 5, wherein said cap safety lock means includes: said barrel housing having an annular recess therein which receives said protective cap; and detent means mounted within said recess of said housing for permanently locking said cap safety lock means.
Claim 8
Dependent Claim
35 words
The structure set forth in claim 1, including: said housing including an annular recess; and said protective cap including a cylindrical portion mounted in said annular recess for slidable movement with respect to said housing.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |