Universal safety syringe having a protective cap, a cylinder, a
plunger and a cannula mounted on a cannula base, it being the case
that the cannula base is designed such that it can be pushed firmly
against a stop in the protective cap, that the protective cap, which
can be pushed externally onto a cone, corresponding to a Luer cone,
of the cylinder, is provided with a narrowed section, which is provided
on the inside of the cap, in front of a recess designed for receiving
the cannula base, and delimits the push on travel, that a recess
which receives a cannula base is provided with an undercut which
prevents the cannula base from being removed in the forward direction,
and with an undercut of which the effect can be overcome by the
cone being widened from the inside and which is provided for safeguarding
the cannula stop from being pushed in unintentionally during insertion
of the syringe, and it also being the case that the plunger is designed
with a section which widens the cone cylindrically and with a mushroom-shaped
plunger head, which comes into pulling contact with the needle stop.
A preferred embodiment provides a safeguard against the plunger
being unintentionally pushed in too early and too far.
Safety syringe with retractable standard needle including a syringe
barrel, a plunger and an injection needle. A commonly used standard
medical injection needle can be firmly fitted with the needle holder
in accordance with the requirement of a user. The inner wall of
the internal chamber at the open end of the syringe barrel is formed
with an entrance recess extending along the axis of the internal
chamber. The operating end of the plunger is formed with a radially
outward projecting stopper section for preventing the needle pulling
mechanism of the plunger from being accidentally latched with the
needle pulling mechanism of the syringe barrel.
A safety needle cannula module in interchangeable combination with
a safety syringe and plunger module, wherein the safety needle cannula
module is formed with one of a variety of needle cannula sizes and
wherein said safety syringe may be one of a variety of syringe sizes.
The safety needle cannula module with needle cannula of desired
size is attached to a safety syringe module wherein said safety
syringe is a desired size. After medication is injected into a body
with the safety needle cannula and the safety syringe, the safety
syringe module reacts with the safety needle cannula module and
further causes said safety needle cannula to be automatically retracted
and disposed within the hollow plunger said safety syringe module.
A safety syringe construction (10) including a conventional syringe
member (20) equipped with a fixed tubular male sleeve member (20)
and spring biased moveable tubular female sleeve member (30) which
is slidable relative to the tubular male sleeve member (30). The
male (30) and female (40) sleeve members are provided with a locking
unit (15) for releasably engaging the female sleeve member (40)
relative to the male sleeve member (30).