Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1991-11-12
1993-11-09
Woodreil, Donald O.
Communications: electrical
Condition responsive indicating system
Specific condition
73726, 73731, 338 4, G01B 2100
Patent
active
052606929
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Field of the Invention
The invention relates to a stomi bag.
Description of the Related Art
A problem for many stomi patients is that the stomi bag will be too full and will loosen, which easily occurs in the night when the patient is asleep and therefore has no control over the stomi bag. Due to the stomi bag coming loose the contents thereof partly can flow out and cause inconvenience. Accordingly, there is a pressing demand for an effective and reliable control device which in one manner or the other can indicate that the stomi bag has reached such a level that it should be emptied.
As a container of flexible material is being filled with a fluid, the pressure against the wall of the container will increase, and according to U.S. Pat. No. 3,546,944 there has already been proposed a device which senses said pressure. According to said publication a member is provided over a fold of the container wall and is connected to the wall at both sides of the fold. When a predetermined pressure has been reached in the container the member will break, the fold being straightened out by the pressure in the container. However, the member can also be elastic to indicate on a non-elastic scale the elongation when the member is being stretched. The alarm or more correctly the indication obtained by means of such a device is not suited, however, to give alarm e.g. when a stomi bag has been filled too much during the sleep or when the bag is not kept under direct visual observation.
EP-A-130670 relates to an apparatus for sensing fluid pressure within a fluid delivery pipe, including a strain gauge device.
SUMMARY OF THE INVENTION
According to the invention in order to overcome the problems discussed above the stomi bag has obtained the characterizing features of claim 1.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to explain the invention in more detail reference is made to the accompanying drawings in which
FIG. 1 is a plan view of a sensor forming part of the device of the invention,
FIG. 2 is a side view of the sensor in an unactivated condition,
FIG. 3 is a corresponding side view of the sensor in an activated condition,
FIG. 4 is a plan view of a strip of elastic foil having an elastic resistance element connected therewith, which can form part of the sensor,
FIG. 5 is a side view of a container having a sensor mounted thereon, which is connected to an alarm device.
FIG. 6 is a side view similar to that of FIG. 5 of an embodiment wherein the sensor is integrated with the container, and
FIG. 7 is a fragmentary cross-sectional view, taken along line A--A in FIG. 6.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The sensor of FIG. 1 to 3 comprises a strip 10 which can consist of an elastomer (e.g. silicon rubber) having carbon powder admixed thereto in order to form as such an electric resistance element, or according to FIG. 4 can consist of a stretchable foil 11 having an electric resistance element 10 attached thereon or embedded therein, said element being of the mentioned construction, elastomer with carbon powder. The resistance element 10 has an electric resistance which changes by elastic stretching of the element. At the ends thereof the resistance element is connected with electric contacts 12, which are fixed to the ends of a flexible but non-elastic band 13 having a shorter length than the strip 10 so that the sensor, when left on its own, will be in the condition which is shown in FIG. 2, i.e. the band 13 forms an arch over the retracted (not stretched) strip 10. On the lower side of the strip 10 there is applied at the ends of the strip where the strip is widened to form circular plates 14, self-adhering glue 15 preferably covered by protection tape.
The strip 10 or the resistance element 10 attached thereto can be stretched as much as is allowed by the non-elastic band 13 so that the sensor will be in the condition according to FIG. 3, and in this condition wherein the resistance element has an elongation determined by the band 13, and thus an electric resistance of a
REFERENCES:
patent: 2420148 (1947-05-01), Ostergren
patent: 2715666 (1955-08-01), Stinchfield
patent: 3546944 (1970-12-01), Mack
patent: 5121107 (1992-06-01), Newell
Crafcontrol AB
Woodreil Donald O.
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