Bottles and jars – Closures – Frangible member or portion
Patent
1998-04-24
1999-12-14
Moy, Joseph M.
Bottles and jars
Closures
Frangible member or portion
215250, 222521, 222541, B65D 4710
Patent
active
06000567&
DESCRIPTION:
BRIEF SUMMARY
A device in a powder cartridge for a dialysis machine The invention relates to a powder cartridge for a dialysis machine, having a screw cap and an externally threaded neck to which said screw cap can be applied.
A powder cartridge of this type is disclosed in DE-A4 217 352.
EP-B1 0 278 100 describes a dialysis system wherein the dialysis liquid is prepared at the site of use from a powder (sodium bicarbonate) which is supplied in a closed container--cartridge--which is inserted into a holder on the machine and is connected to an inlet for water and an outlet for the concentrated solution of the powder, which is obtained when water flows through the cartridge and dissolves the powder. This liquid concentrate then is added in an accurately measured amount to a water flow in the machine for obtaining dialysis liquid having the required concentration.
In a dialysis machine available on the market, which operates with this system, Gambro AK 100, the cartridge is inserted between two yaws pivotally mounted on a vertical wall of the machine one above the other, one of these yaws having an inlet for water and the other an outlet for the liquid concentrate obtained by dissolving the powder in the cartridge when water is allowed to flow through the cartridge. Then, the inlet and the outlet are connected to hollow studs which are provided at the ends of the cartridge. The connection takes place by penetrating membranes which are provided on the hollow studs and close these studs. The upper yaw is swung upwards when the cartridge is to be located between the yaws or is to be removed from this position after the powder in the cartridge having been consumed, but the yaws can also be swung towards said wall of the machine, the upper yaw downwards and the lower yaw upwards, in order that the inlet and the outlet, respectively, shall be connected with two connection pieces on the wall which are dimensioned in the same manner as the hollow studs on the cartridge. Between these connection pieces there is provided a short circuit conduit so that liquid can flow from one yaw to the other via the short-circuit conduit without passing through a cartridge positioned between the yaws. This short-circuit connection is used also when the machine between two dialysis treatments following one upon the other has to be rinsed and disinfected by circulating a flow of disinfection liquid through the machine.
After a dialysis treatment there is always left some liquid in the cartridge. When the cartridge after completed dialysis treatment is removed from the prior art dialysis machine it accordingly cannot be avoided that this liquid flows out onto the lower yaw and soils not only this yaw but also parts of the machine located below said yaw, and the floor where the machine is located.
The purpose of the invention is to eliminate this drawback which is most annoying for the personnel performing the dialysis treatment, by providing a powder cartridge wherein liquid remaining in the cartridge will be maintained therein when the cartridge is removed from the dialysis machine, and can be discharged into a sink or the like.
It is a further purpose of the invention to construct the screw cap screwed onto the outlet of the powder cartridge after the powder having been filled into the cartridge, in such a way that the screw cap after the cartridge having been emptied cannot be used again for closing the cartridge in order that the cartridge cannot be refilled at the site of use with the risks connected therewith: wrong dosage of the powder, refilling with powder of a wrong composition, contamination of the interior space of the cartridge, etc.
The purposes mentioned above are achieved by the powder cartridge according to the invention having obtained the characterizing features of claim 1.
In order to explain the invention in more detail an illustrative embodiment will be described with reference to the accompanying drawings in which
FIG. 1 is a perspective view of a dialysis machine with the device according to the invention,
FIG. 2 is a side vi
REFERENCES:
patent: 2151826 (1939-03-01), Andersen
patent: 4458817 (1984-07-01), Guala
patent: 4569456 (1986-02-01), Weiler et al.
patent: 4940154 (1990-07-01), Vollmar
patent: 5088613 (1992-02-01), Dutt et al.
patent: 5588502 (1996-12-01), Sander et al.
Carlsson Per-Olov
Falkvall Thore
Gillerfalk Bjorn
Althin Medical AB
Moy Joseph M.
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