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 Title: |
US5135510:
Hypodermic syringe
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Maszkiewicz, Mark E.; Coraopolis, PA 15108
Miller, Mary C.; Pittsburgh, PA 15226
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| Assignee: |
None
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| Published / Filed: |
1992-08-04
/ 1991-04-19
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| Application Number: |
US1991000687562
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| IPC Code: |
Advanced:
A61M 5/32;
A61M 5/31;
Core:
more...
IPC-7:
A61M 5/32;
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| U.S. Class: |
Current:
604/195;
604/198;
Original:
604/195;
604/198;
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| Field of Search: |
604/198,192,263,187,227,195,110
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| Priority Number: |
| 1991-04-19 |
US1991000687562 |
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| Abstract: |
A device for preventing exposure of a contaminated hypodermic needle to health care personnel is provided. A syringe barrel having a flange at one end and a hypodermic needle at the other end is adapted to receive a plunger. A protective guard fits around the syringe barrel and moves relative thereto. The protective guard can assume different positions in which the hypodermic needle is either exposed or retracted in the protective guard. The protective guard is spring biased to a guarded position which covers the hypodermic needle. A ratcheting mechanism provided on the protective guard and the syringe barrel restricts that movement of the protective guard which exposes the hypodermic needle. When the needle has been used and is being removed from the patient's body, the syringe barrel and hypodermic needle retract inside the protective guard and the ratcheting mechanism may be disabled to permanently secure the needle in the guarded position.
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| Attorney, Agent or Firm: |
Buchanan Ingersoll ;
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| Primary / Asst. Examiners: |
Yasko, John D.;
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
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| Family: |
None
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First Claim:
Show all 14 claims |
We claim:
1. A device for preventing exposure of a contaminated hypodermic needle comprising:
- a syringe barrel having a flange provided at a proximal end and a hypodermic needle provided at a distal end, said proximal end adapted to receive a plunger;
- a protective guard adapted to fit around said syringe barrel, said protective guard adapted to move between a first position covering said hypodermic needle and a second position exposing said hypodermic needle;
- means for moving said protective guard from said first position to said second position;
- spring means provided inside said protective guard and extending from an interior proximal end of said protective guard to an exterior proximal end of said syringe barrel, said spring means providing a force on said syringe barrel to retract said syringe barrel within said protective guard, said spring means adapted to retract said syringe barrel within said protective guard automatically when released; and
- locking means provided on said syringe barrel and said protective guard to restrict axial movement of said protective guard toward said second position, said locking means comprising a serrated portion provided on said syringe barrel and ratcheting means provided on said protective guard, said ratcheting means adapted to engage said serrated portion.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 23 U.S. patent(s) that reference this one
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