Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
2000-06-13
2001-04-17
Yasko, John D. (Department: 3763)
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
C604S198000, C604S263000
Reexamination Certificate
active
06217559
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the field of automatic safety syringe constructions.
2. Description of Related Art
As can be seen by reference to the following U.S. Pat. Nos. 5,512,050; 5,527,294; 5,554,130; and 5,554,131, the prior art is replete with myriad and diverse safety syringe constructions.
While all of the aforementioned prior art constructions are more than adequate for the basic purpose and function for which they have been specifically designed, they do not represent the final word with regard to the design of devices of this type.
As all health care professionals are all too well aware, the greatest risk of infection to the health care giver involves the administration of an injection to the patient. The patient's bodily fluids can be transferred to the health care giver by careless handling of the sharp point of a hypodermic needle.
As a consequence of the foregoing situation, there has existed a longstanding need for a new and improved type of safety syringe construction involving a movable sleeve which is normally extended to cover the point of the needle when not in use, and which can be retracted to give the patient an injection, and the provision of such a construction is a stated objective of the present invention.
BRIEF SUMMARY OF THE INVENTION
Briefly stated, the safety syringe construction that forms the basis of the present invention comprises in general, a conventional syringe unit having a male sleeve unit, a female sleeve unit, a spring unit, and a locking unit.
As will be explained in greater detail further on in the specification, the male sleeve unit is fixedly secured to one portion of the syringe unit, the female sleeve unit is slidably disposed on the male sleeve unit, the spring unit is operatively connected on one end to the female sleeve unit, and operatively connected on the other end to another portion of the syringe unit such that the female sleeve unit in its extended position covers the pointed end of the syringe unit needle. The female sleeve unit can be retracted relative to the male sleeve unit to expose the needle for the purpose of giving a patient an injection.
In addition, the male and female sleeve units are further provided with a locking unit which can captively, yet releasably engage the female sleeve unit relative to the male sleeve unit in the retracted position.
REFERENCES:
patent: 5512050 (1996-04-01), Caizza et al.
patent: 5527294 (1996-06-01), Weatherford et al.
patent: 5554130 (1996-09-01), McDonald et al.
patent: 5554131 (1996-09-01), Lacivita
Henderson & Sturm LLP
Yasko John D.
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