Safety device for syringe

Details Safety device for syringe Safety device for syringe

2002-07-10

2004-06-22

Casler, Brian L. (Department: 3763)

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

C604S187000

Reexamination Certificate

active

06752783

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a safety device for syringe and the device is slidably mounted to the barrel. The device is slidably operated to allow the needle extend from the device and receive the needle after being used.
BACKGROUND OF THE INVENTION
A conventional syringe device is shown in FIG.
1
and generally includes a barrel
10
with a plunger
15
movably received in the barrel
10
. A stopper
17
is connected to an end of the plunger
15
by a hook
17
on the distal end of the plunger
15
. A base
12
extends from the barrel and a needle assembly
18
is mounted to the base
12
. The needle assembly
18
includes a needle hub
180
and the needle
181
is secured to the needle hub
180
. A cap is mounted to the needle hub
180
to protect the user from being hurt by the needle
181
. Medicine is received in the chamber
11
in the barrel
10
and is ejected out from the needle
181
by pushing the plunger
15
. However, the users are often hurt by the needle
181
when re-capping the cap to the needle hub
180
and this is dangerous for the users. Besides, the caps could disengaged from the discarded syringes and the janitors could be hurt by the needles without the protection of the caps.
The present invention intends to provide a safety device which is slidably mounted to the barrel and the needle is received in the device after the syringe is used.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a safety device for syringes and the safety device includes a sleeve having a first passage for receiving a connection member therein. A connection portion extends from a first end of the sleeve so as to form an inward shoulder. A plurality of grooves are defined in the inner periphery of the first passage and located at a second end of the sleeve. A plurality of protrusions extend inward from the inner periphery of the first passage of the sleeve.
The connection member has a base at a first end of the connection member and a second passage is defined through the connection member. A tubular wall extends from the first end of the connection member and the base is enclosed by the tubular wall. A skirt extends from an outer periphery of the tubular wall and a plurality of pawls split from the skirt. A first end of the connection member is connected to the barrel.
A needle assembly has a needle hub which is mounted to the base and securely engaged with the tubular wall. A needle extends from the needle hub and a cap is removably mounted to the needle hub.


REFERENCES:
patent: 4801295 (1989-01-01), Spencer
patent: 5201708 (1993-04-01), Martin
patent: 5222945 (1993-06-01), Basnight
patent: 5415645 (1995-05-01), Friend et al.

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