Injection device with bellowed reservoir

Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...

Reexamination Certificate

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Details

C604S212000, C604S195000, C604S185000

Reexamination Certificate

active

06315761

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to a device for injection of medicine into a human body and is designed for one-time patient use during inpatient or outpatient treatment.
BACKGROUND OF THE INVENTION
Popular injection devices are inexpensive devices with a deformable plastic container filled with a medicine and used in place of piston syringes. Such devices, as described for example, in application WO 93/09826, used as a prototype, contain a needle pressed into a housing of a device, the passage of which connects with a cavity of a plastic container. By squeezing the plastic container, a medicine runs under pressure into a patient's body.
The drawback of these devices is the possibility of their uncontrollable reuse.
BRIEF DESCRIPTION OF THE INVENTION
The object of the present invention is to prevent the reuse of the device with a deformable injection container, such as the device described in application WO 93/09826.
This object is attained through the use of an injection container made in the form of a bellows with an open end hermetically connected with the end surface of a housing
eedle holder. The bottom of the bellows and the part of the end surface enveloped by the bellows of the housing
eedle holder are mutually brought together and are fitted with locking elements forming a permanent connection after an injection is given.
The locking elements may be in the form of a pair of interacting elastically deformable hooks with a beveled catch and a female part in the form of a hole with a ledge.
An additional method to prevent the reuse of this injection device may be provided by making a thin partition in the bottom of the bellows, the center of which positions on the geometric axis of the needle. The inner end of the needle is sharpened and protruded from the housing
eedle holder towards the bottom of the bellows.


REFERENCES:
patent: 3557788 (1971-01-01), Swartz
patent: 3938514 (1976-02-01), Boucher
patent: 4753638 (1988-06-01), Peters
patent: 4883466 (1989-11-01), Glazier
patent: 5197953 (1993-03-01), Colonna
patent: 5318547 (1994-06-01), Altschuler
patent: 5382235 (1995-01-01), Sak
patent: WO 93/09826 (1993-05-01), None

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