Patent US4863433A successfully refreshed from Google Patents.
US4863433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syringe
Assignee: Bayer Corp
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Filing: 1988-05-23
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Granted: 1989-09-05
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Expires: 2008-05-23
Abstract
Abstract A syringe is provided which has a barrel, a plunger having a hollow center, with the needle stored in the hollow center. A storage compartment is used to encase the needle and keep it sterile while being stored within the plunger. A cap on the tip of the barrel having a protruding shoulder securely engages the tip of the barrel while being stored, and assists in preventing leakage of inoculant from the barrel of the syringe.
Inventors
- 👤 John B. Payne
- 👤 Davis R. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:00
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/002
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
205 words
In a syringe having a barrel with two ends, a hollow tip at one end to receive a needle means, a plunger slidably fitting within the other end of said barrel, the improvement comprising: a hollow center within said plunger; a cylindrical storage compartment for holding the needle means, said compartment having a lower portion adapted to frictionally hold said needle means and an upper portion releasably connected to the lower portion for enclosing said needle means; said storage compartment being frictionally and slidably received within said hollow center of said plunger for storing the needle means when not in use, and at least part of said upper portion extending beyond said plunger whereby said storage compartment may be grasped and removed from said plunger; said barrel being adapted to be pre-filled with an inoculant; and a cap having cylindrical walls, an open end and a closed end, a cylindrical shoulder protruding inwardly from said closed end of said cap wherein said shoulder extends into said hollow tip and said cylindrical walls frictionally engaging said tip such that said cap seals said tip of said barrel to prevent leakage of said inoculant while said needle means is stored in said hollow center of said plunger.
Claim 2
Dependent Claim
205 words
In a syringe having a barrel with two ends, a hollow tip at one end to receive a needle means, a plunger slidably fitting within the other end of said barrel, the improvement comprising: a hollow center within said plunger; a cylindrical storage compartment for holding the needle means, said compartment having a lower portion adapted to frictionally hold said needle means and an upper portion releasably connected to the lower portion for enclosing said needle means; said storage compartment being frictionally and slidably received within said hollow center of said plunger for storing the needle means when not in use, and at least part of said upper portion extending beyond said plunger whereby said storage compartment may be grasped and removed from said plunger; said barrel being adapted to be pre-filled with an inoculant; and a cap having cylindrical walls, an open end and a closed end, a cylindrical shoulder protruding inwardly from said closed end of said cap wherein said shoulder extends into said hollow tip and said cylindrical walls frictionally engaging said tip such that said cap seals said tip of said barrel to prevent leakage of said inoculant while said needle means is stored in said hollow center of said plunger.
Claim 3
Dependent Claim
13 words
The syringe of claim 1 wherein said cylindrical shoulder has a concave center.
Claim 4
Dependent Claim
13 words
The syringe of claim 1 wherein said cylindrical shoulder has a concave center.
Claim 5
Dependent Claim
33 words
The syringe of claim 1 wherein the needle means has fin means for frictionally engaging the lower portion of said storage compartment so as to hold said needle means within said lower portion.
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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |