Retractable needle device
AssigneeComputer Controlled Syringe Inc.
InventorMark T. Smith
Life of this patent
Estimating the term…
Abstract
The present invention provides, in a preferred embodiment, a retractable needle (26) device for use with a syringe. The syringe may be manually driven or electronically driven. In the retracted position, the needle is enclosed within a safety shield and may be extended from the safety shield (60) upon actuation of the plunger (38) normally used to dispense the biocompatible material from the needle. In this instance, initial pressure on the plunger serves to extract the needle and after the needle is extracted, the biocompatible material is dispensed from a carpule in communication with the needle. When it is desired to retract the needle, the direction of the plunger travel is reversed thereby effectively retracting the needle back in to the safety shield.
Claims45
A retractable needle device comprising:
- a housing comprising a plunger operable between a first, extended position and a first, retracted position;
- a shield portion engaged to the housing, the shield portion comprising a first chamber,
- a carpule retraction portion in sliding engagement with plunger,
- a carpule releaseably engaged to the carpule retraction portion, the carpule comprising a needle portion, a stopper portion and a second chamber disposed therebetween for receiving an injectable fluid, the carpule being disposed in the first chamber and being movable between a second, extended position in which the needle extends from the shield portion and a second, retracted position in which the needle is contained in the shield portion.
A retractable needle device comprising:
- a syringe component having an outer housing, a plunger, a plunger driver connected to said plunger and operable to move said plunger between extended and retracted positions, and a secondary carpule housing in sliding communication with said plunger driver;
- a safety shield releaseably engageable with said outer housing of said syringe component;
- a carpule for containing said biocompatible material, the carpule having a housing with an attached needle, said carpule housing releaseably engageable with said secondary carpule housing of said syringe component, said carpule having an extracted position in which an end portion of said needle extends from said safety shield, and a retracted position in which said needle is contained within said safety shield, when said carpule housing is engaged with said secondary carpule housing and said safety shield is engaged with said outer housing,
- wherein when said plunger is moved to the extended position said carpule is moved to the extracted position thereby extending said needle and expelling said biocompatible material, and when said plunger is moved to the retracted position said carpule is moved to the retracted position thereby containing said needle in said safety shield.
A safety needle device for use with a syringe component, the syringe component having an outer housing, a plunger with a plunger driver connected thereto, said plunger driver operable to move said plunger between extended and retracted positions, and a secondary carpule housing in sliding communication with said plunger driver, said safety needle device having:
- a safety shield releaseably engageable with said outer housing of said syringe component;
- a carpule for containing said biocompatible material, the carpule having a housing having an attached needle, said carpule housing releaseably engageable with said secondary carpule housing of said syringe component, said carpule having an extracted position in which an end portion of said needle extends from said safety shield, and a retracted position in which said needle is contained within said safety shield, when said carpule housing is engaged with said secondary carpule housing and said safety shield is engaged with said outer housing,
- wherein when said plunger is moved to the extended position said carpule is moved to the extracted position thereby extending said needle and expelling said biocompatible material, and when said plunger is moved to the retracted position said carpule is moved to the retracted position thereby containing said needle in said safety shield.
A retractable needle device for use with a carpule containing a biocompatible material, said device having:
- a syringe component having an outer housing, a plunger with a plunger driver connected thereto, said plunger driver operable to move said plunger between extended and retracted positions, and a secondary carpule housing in sliding communication with said plunger driver;
- a safety shield releaseably engageable with said outer housing of said syringe component;
- a carpule housing having an attached needle, for receiving said carpule, said carpule housing releaseably engageable with said secondary carpule housing of said syringe component, said carpule housing having an extracted position in which an end portion of said needle extends from said safety shield, and a retracted position in which said needle is contained within said safety shield, when said carpule housing is engaged with said secondary carpule housing and said safety shield is engaged with said outer housing;
- wherein when said plunger is moved to the extended position said carpule housing is moved to the extracted position thereby extending said needle and expelling said biocompatible material, and when said plunger is moved to the retracted position said carpule housing is moved to the retracted position thereby containing said needle in said safety shield.
A safety needle device for use with a carpule containing a biocompatible material and a syringe component having an outer housing, a plunger with a plunger driver connected thereto, said plunger driver operable to move said plunger between extended and retracted positions, and a secondary carpule housing in sliding communication with said plunger driver, said safety needle device having:
- a safety shield releaseably engageable with said outer housing of said syringe component;
- a carpule housing having an attached needle, for receiving said carpule, said carpule housing releaseably engageable with said secondary carpule housing of said syringe component, said carpule housing having an extracted position in which an end portion of said needle extends from said safety shield, and a retracted position in which said needle is contained within said safety shield, when said carpule housing is engaged with said secondary carpule housing and said safety shield is engaged with said outer housing;
- wherein when said plunger is moved to the extended position said carpule housing is moved to the extracted position thereby extending said needle and expelling said biocompatible material, and when said plunger is moved to the retracted position said carpule housing is moved to the retracted position thereby containing said needle in said safety shield.
Dependencies are inferred from the claim text.