Fluid handling – With coupling
Patent
1989-06-14
1990-08-07
Michalsky, Gerald A.
Fluid handling
With coupling
137317, 137580, 251146, F16L 2700
Patent
active
049459503
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The present invention relates to a continuous output device for a liquid or gaseous fluid.
PRIOR ART
An output device comprising a rail with a slit therein intended to contain and conduct a fluid is previously known from e.g. U.S. Pat. No. 3,913,470. The slit opens to the outer surface of the rail and is sealed by a sealing strip. A coupling is positioned on the rail at an optional position along the rail. The coupling pushes aside a part of the sealing so that the fluid can pass out to the coupling and thence to a hose connected to the coupling for distribution to the intended apparatus.
In the Swedish patent specification No. 7700757-3 there is disclosed an output device for a fluid, in which the coupling is continuously moveable along the rail. However, the coupling is not removable from the rail but only moveable along said rail. A sealing strip for a slit is pushed aside by a semicircular member. Two sealing rollers on either side of said member ensure that the sealing strip is pushed against the slit on either side of the coupling.
U.S. Pat. No. 4,117,773, discloses an output device for fresh air, in which a coupling is moveable along a tube. Also at said output device, it is impossible to attach the coupling removably at optional positions along the tube or attaching several couplings along the tube. A slit along the tube is provided with a sealing strip, which can have different constructions according to said patent specification. The sealing strip can be of stainless steel provided with an insulating lining or a protection cover of glass fibres. The strip can be divided in several sections, e.g. three meters long and interconnected by a sealing. The elasticity of the strip entails that it springs into abutment with the rims of the slit at either side of the coupling.
DISCLOSURE OF THE INVENTION
The object of the present invention is to provide an output device having the possibility to place several couplings continuously along a rail.
Another object of the present invention is to provide an output device having a practical and useful coupling.
Still another object of this invention is to provide an output device specifically suitable to be used at the distribution of gases at a hospital.
Another object of the present invention is to provide a sealing band or sealing strip for such an output device, in which the sealing strip offers a safer spring-back of the strip at either side of an output.
Furthermore, it is an object of the present invention to provide a bridgement device for such a rail, which is easy and reliable to use.
Thus, there is provided a continuous output device for a liquid or gaseous fluid, comprising a rail having at least one channel opening to a first surface of the rail through a slit which is sealed with a sealing strip, whereby the fluid is adapted to be supplied to the slit of the rail through a suitable connection, and a coupling comprising an opening member for locally pushing aside the sealing strip so that the fluid can pass to the coupling beyond the sealing strip for further distribution to a using place.
According to the invention, the coupling comprises a cover; a rubber sleeve positioned in said cover and adapted to seal against the bottom of the slit; an engagement member for engaging and locking the coupling to the rail; and an activation member for moving said opening member to cooperation with and pushing aside said sealing strip in the slit.
The rail may comprise several parallel channels for distribution of different gases or liquids. Said channels can be accessed by the same coupling.
Preferably, the sealing strip comprises a spiral spring provided with a sealing material for sealing against the slit. Suitably, the spiral spring have revolutions forming an acute angle with the longitudinal axis of the spring.
The sealing strip can be adapted to fit loosely in a main part of said channel of the rail and the channel may further comprise a side part adapted to house a biasing member adapted to bias the sealing strip, after the insert
REFERENCES:
patent: 3580401 (1971-05-01), Stahl
patent: 3620250 (1971-11-01), Wieck
patent: 3643867 (1972-02-01), Thietje
patent: 3814130 (1974-06-01), Allen et al.
patent: 3913470 (1975-10-01), Cullen
patent: 4117773 (1978-10-01), Johnson
Astra Meditec AB
Michalsky Gerald A.
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