US4850994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hypodermic syringe
Assignee: PHYSIONIC GESELLSCHAFT fur MEDIZIN- und SYSTEMTECHNIK GmbH
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Filing: 1987-06-10
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Granted: 1989-07-25
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Expires: 2007-06-10
Abstract
Abstract The invention relates to a hypodermic syringe in which a hollow needle is surrounded by a protective sheathing in such a way that after the injection has been performed the protective sheathing encloses the tip of the hollow needle to provide protection.
Inventors
- 👤 Ekkehard Zerbst
- 👤 Tim Peters
- 👤 Hans-Eberhard Koralewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:22
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/32; A61M5/3205; A61M5/321; A61M5/322; A61M5/3243; A61M5/326; A61M2005/3103; A61M2005/3107; A61M2005/3109; A61M2005/3261
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
Hypodermic syringe characterized by a syringe cylinder, said syringe cylinder defining a liquid reservoir, a needle assembly (2,3) including a hollow needle having a first end in communication with said cylinder reservoir and having an opposite end with a tip (4), said needle assembly including a syringe plunger movable in said syringe cylinder (1), a protective sheathing (20) axially movable relative to said hollow needle (3), said sheathing being movable subsequent to withdrawal of the hollow needle (3) out of the injection site into a position in which the tip (4) of the hollow needle (3) is covered, said protective sheathing being designed as a protective cylinder (2) slidably mounted on said syringe cylinder (1), said syringe cylinder having a back rim, said protective cylinder (20) having an elastic flange acting as a back stop (21) that encircles said back rim of the syringe cylinder (1).
Claim 2
Dependent Claim
146 words
Hypodermic syringe characterized by a syringe cylinder, said syringe cylinder defining a liquid reservoir, a needle assembly (2,3) including a hollow needle having a first end in communication with said cylinder reservoir and having an opposite end with a tip (4), said needle assembly including a syringe plunger movable in said syringe cylinder (1), a protective sheathing (20) axially movable relative to said hollow needle (3), said sheathing being movable subsequent to withdrawal of the hollow needle (3) out of the injection site into a position in which the tip (4) of the hollow needle (3) is covered, said protective sheathing being designed as a protective cylinder (2) slidably mounted on said syringe cylinder (1), said syringe cylinder having a back rim, said protective cylinder (20) having an elastic flange acting as a back stop (21) that encircles said back rim of the syringe cylinder (1).
Claim 3
Dependent Claim
141 words
Hypodermic syringe characterized by a syringe cylinder, said syringe cylinder defining a liquid reservoir, a needle assembly (2,3) including a hollow needle having a first end in communication with said cylinder reservoir and having an opposite end with a tip (4), said needle assembly including a syringe plunger movable in said syringe cylinder (1), a protective sheathing (20) axially movable relative to said hollow needle (3), of the hollow needle (3) out of the injection site into a position in which the tip (4) of the hollow needle (3) is covered, said protective sheathing being designed as a protective cylinder (2) slidably mounted on said syringe cylinder (1), said protective cylinder (20) having a catching lug (22), said catching lug engaging in at least one spot with said syringe cylinder (1) and extending into the path of said syringe plunger (16).
Claim 4
Dependent Claim
141 words
Hypodermic syringe characterized by a syringe cylinder, said syringe cylinder defining a liquid reservoir, a needle assembly (2,3) including a hollow needle having a first end in communication with said cylinder reservoir and having an opposite end with a tip (4), said needle assembly including a syringe plunger movable in said syringe cylinder (1), a protective sheathing (20) axially movable relative to said hollow needle (3), of the hollow needle (3) out of the injection site into a position in which the tip (4) of the hollow needle (3) is covered, said protective sheathing being designed as a protective cylinder (2) slidably mounted on said syringe cylinder (1), said protective cylinder (20) having a catching lug (22), said catching lug engaging in at least one spot with said syringe cylinder (1) and extending into the path of said syringe plunger (16).
Claim 5
Dependent Claim
30 words
Hypodermic syringe pursuant to claim 2 characterized in that: the protective cylinder (30) has a locking means (32) that holds the former on the syringe cylinder (1) in mounted position.
Claim 6
Dependent Claim
35 words
Hypodermic syringe pursuant to claim 2 characterized in that: the protective cylinder (3) has a latching means 31 on the end that holds the former after the injection in the drawn-out protective position (FIG. 16).
Claim 7
Dependent Claim
24 words
Hypodermic syringe pursuant to claim 2 characterized in that: the locking means (32) is a locking ring mountable along with the protective cylinder (30).
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) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |