Automatic non-reusable needle guard

Details Automatic non-reusable needle guard Automatic non-reusable needle guard

1996-04-15

1997-11-18

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604198, A61M 500

Patent

active

056882416

ABSTRACT:
The automatic non-reusable needle guard includes an outer cylinder adaptable to a needle or needle retaining device such as a syringe. An inner cylinder is operable with the outer cylinder for movement of the inner cylinder from an initial retractable position to a released or armed position and further to an extended irreversible position. The mechanism which provides movement of the inner cylinder relative to the outer cylinder incorporates a track formed in the inner surface of the outer cylinder. The inner cylinder incorporates at least one protruding member which may be formed on the outer surface of the inner cylinder and is positioned in the track for guiding the inner cylinder from the initial usable position to the released position and further to the extended irreversible position. A spring is disposed within the inner cylinder and coupled to the outer cylinder for urging the inner cylinder away from the outer cylinder thereby moving the inner cylinder from the released or armed position to the extended irreversible position. The needle guard also includes a locking mechanism for preventing removal or retraction of the inner cylinder after the inner cylinder is fully extended in the extended irreversible position. The outer cylinder has a lip portion for preventing removal of the inner cylinder from the outer cylinder. At least one flexible flap positioned on the outer surface of the inner cylinder prevents retraction of the inner cylinder after use.

REFERENCES:
patent: 4813940 (1989-03-01), Parry
patent: 4894055 (1990-01-01), Sudnak
patent: 4911693 (1990-03-01), Paris
patent: 5104384 (1992-04-01), Parry
patent: 5292314 (1994-03-01), D'Alessio et al.
patent: 5295975 (1994-03-01), Lockwood, Jr. et al.
patent: 5364362 (1994-11-01), Schulz
patent: 5389085 (1995-02-01), D'Alessio et al.

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