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OwnerGerald R. Paxton, Norman W. Seid +1inventors
InventorsGerald R. Paxton, Norman W. Seid, Garry L. Gilman
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A retractable needle-type syringe having a maximum amount of safety features, including maintaining the needle of the syringe in a retracted and totally shielded position prior to use. After an injection has been given, the plunger rod of the syringe can be operated by one hand of the user in such a manner as to completely and totally disable the syringe and thereby render secondary use of the syringe practically impossible. This feature leaves the other hand of the user out of danger and proximity to the syringe and available to perform other patent-assisting functions. The above multifunctional nature and operation of this invention is accomplished through the use of a minimum number individual components which are uniquely adapted for packaging and cooperative interaction within an elongated cylindrical housing of the syringe. In addition, this syringe may be manufactured in a cost-effective economical manner to produce a universal and reliable general purpose syringe having a high price-performance figure of merit.
A syringe of the type having a retracted needle movable within a syringe housing and therein protected and shielded prior to syringe use including, in combination:
A syringe which may be totally disabled after an initial use so that it cannot be retrofitted which comprises means within a syringe housing and mechanically coupled to a needle holder therein for retracting said needle holder and needle attached thereto into said housing after an initial syringe use while simultaneously removing all pressure sustaining means within said housing.
A non-retrofittable syringe including ratchet rotation means within a syringe housing and mechanically coupled between a plunger rod and a needle holder and operative to initially drive said needle to a non-shielded position in preparation for an injection and thereafter operative to retract said needle into said syringe housing to a totally inoperative and disabled position therein.
A retractable needle type syringe including a plunger rod mechanically coupled through a syringe housing to a needle, including:
A method for operating a syringe which includes the steps of:
A method for minimizing human exposure to the needle of a syringe and for totally disabling said syringe from further use after a single injection which comprises the steps of:
Dependencies are inferred from the claim text.