Multifunctional retractable needle type general purpose disabling syringe having enhanced safety features and related method of operation
First Claim
1. 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. means for maintaining said needle in a completely retracted position within said housing prior to use, andb. plunger means mechanically coupled between one end of said syringe where it is exposed to pressing by a finger or thumb at one end of said needle for driving said needle to an extended and exposed position when said syringe is ready for use, whereby said syringe may be operated with one hand of a user.
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Accused Products
Abstract
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.
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Citations
27 Claims
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1. 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:
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a. means for maintaining said needle in a completely retracted position within said housing prior to use, and b. plunger means mechanically coupled between one end of said syringe where it is exposed to pressing by a finger or thumb at one end of said needle for driving said needle to an extended and exposed position when said syringe is ready for use, whereby said syringe may be operated with one hand of a user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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- 10. 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.
- 17. 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.
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21. A retractable needle type syringe including a plunger rod mechanically coupled through a syringe housing to a needle, including:
- means mechanically coupled between said plunger rod and said needle and rotationally responsive to an inwardly press of said plunger rod into said housing for retracting said needle to an inoperative position within said housing, whereby a slight thumb or finger motion acting against an end of said plunger rod is operative to disable said syringe, thereby leaving the other hand of said user available for other functions and out of harm'"'"'s way.
- View Dependent Claims (22, 23)
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24. A method for operating a syringe which includes the steps of:
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a. pressing a plunger rod forward to extend a needle therefrom, and b. pressing said plunger rod forward after an injection has been given to retract said needle in a housing of said syringe to disable said syringe. - View Dependent Claims (25)
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26. 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:
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a. pressing a syringe plunger to move a needle thereof from a shielded position into an extended and exposed position, b. retracting said plunger to fill said syringe with a fluid, c. pressing said plunger forward to give an injection and maintain said needle in an extended and rigid position, d. pressing said plunger to retract said needle into said syringe housing and into an inoperative position and condition, while also simultaneously e. removing all pressure sustaining means from said syringe and preventing any fluid from being drawn therein or ejected therefrom. - View Dependent Claims (27)
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Specification