Valves and valve actuation – With correlated flow path – Valve operated by joining flow path sections
Patent
1992-09-22
1994-03-29
Schwadron, Martin P.
Valves and valve actuation
With correlated flow path
Valve operated by joining flow path sections
604249, A61M 3900
Patent
active
052977765
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a coupling device for connecting tube lines used in medicine, with an initial coupling part within which is mounted an axially adjustable hollow pin exhibiting outlet openings and serving to attach an initial coupling part which in operating position runs through a sponge that can be impregnated with disinfectant and which opens by way of its outlet openings into a second coupling part connected in detachable form to the first coupling part, while the second coupling part exhibits at least two attachment openings.
A device of this type is known to the prior art from WO 90/07953. In the known procedure of sterilely connecting tube lines for medical purposes, a hollow pin is held in axially adjustable position in a coupling part, while with the axial adjustment of the pin the free end, facing away from the tube-connecting end of the pin, moves through elastically deformable inserts, which can be impregnated with disinfectant, into the second coupling part. This second coupling part which can be connected to the first coupling part exhibits two openings: a central vent, which is closed by an extension of the pin when the latter is moved into its terminal position, and a second opening of the second coupling part, which can be used to connect infusion bottles, bags, and the like, directly to the patient. In devices like that of WO 90/07953 the replacement of such infusion bottles, bags, and the like, required only that the pin again be moved through the lip seal and through the wiping areas to its initial position in order to assure that there was a tight seal for the infusion solution during replacement of the infusion equipment or the like, to thereby reduce the danger of infection. After changing the infusion bottles, bags, etc., the hollow pin could again be moved into its adjusted position and infusion solutions, or the like, again be fed to the patient by producing an open connection between the infusion bottle and the hollow pin. In order to seal the vent when adjusting the pin it was necessary in the known design to press the hollow pin and its extension into the vent under high mechanical pressure.
SUMMARY OF THE INVENTION
The goal of the invention is to create a device of the type described above in which contamination of the infusion solution by disinfectants, ambient air, or the like is avoided with certainty and a vent or additional attachment opening can be tightly sealed with a low mechanical load on the hollow pin. To solve this problem the invention basically consists in the fact that the second coupling part exhibits a sealing component adjustable in the longitudinal direction for a centrally positioned connecting hole and the hollow pin exhibits a stop face for the adjustable sealing component. The fact that the second coupling part displays a longitudinally adjustable sealing component for a centrally placed attachment opening assures that in the axial adjustment of the hollow pin the centrally positioned attachment opening is securely sealed by the adjustable sealing component and the hollow pin is not exposed to any unduly high mechanical loads that might arise in adjusting and turning the pin in the centrally positioned attachment hole. Because the hollow pin exhibits a contact surface or stop face for the adjustment of the sealing component, the sealing component can be moved axially merely by positioning the hollow pin on its side turned away from the centrally positioned attachment hole, while such adjustment again exposes the hollow pin to extremely low mechanical loads.
The second coupling part is advantageously designed in such a way that the sealing component is guided in non-rotating fashion in the longitudinal direction of the coupling device. Because the sealing component is guided in non-rotating fashion in the longitudinal direction of the coupling device it is assured that when moved in the longitudinal direction the sealing component cannot tilt or become wedged in an undesirable fashion and thereby impair the complet
REFERENCES:
patent: 3409015 (1968-11-01), Swanson
patent: 3896853 (1975-07-01), Bernhard
patent: 4710168 (1987-12-01), Schwab et al.
patent: 5034000 (1991-07-01), Freitas et al.
patent: 5049128 (1991-09-01), Duquette
Lee Kevin L.
Schwadron Martin P.
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