The present invention relates to devices for discharging fluid from containers, to devices for delivering medium from a canister, and to fluid delivery systems including such devices and/or systems.
The discharge and delivery of fluid from containers, such as, for example, intravenous fluid delivery bags, fluid soap containers, fluid food containers, or fuel tanks, is typically effected using an exit port or exit tube disposed at a drainage or discharge end of such containers. Generally, the discharge end is provided at a location that allows the discharge of fluid from a container as a function of a vertical orientation of the container to allow a discharge of fluid therefrom based on gravity. The above typically entails the provision of an exit port at a lower end of the container.
A disadvantage of the above configuration is that it does not ensure a discharge of fluid from the container in a reliable manner when the container is subject to static and/or dynamic forces that tend to shift the fluid within the container such that the fluid cannot reliably reach the exit port. For example, an intravenous delivery bag being used while being transported, such as when a patient is being transported via helicopter, for example in a combat situation, could be subject to “static” forces other than gravitational forces, for example by either laying flat on a floor, or bearing the weight of another object thereon, or being inadvertently folded. The intravenous delivery bag could also be subject to “dynamic” forces brought about as a result of a movement of the bag, thus having its fluid contents move within the bag during transport. Under such circumstances, the fluid within the intravenous delivery bag may not reach the exit port as readily as when the static and/or dynamic forces are not present. Forces applied on the intravenous delivery systems, for example when a patient is being transported, sometimes tend to temporarily shut off the delivery of fluid to the patient.
When the container is another type of container, such as for example, when the container is a fuel tank on an airplane, the tank could be subject to static forces other than gravitational forces, such as when the airplane changes its spatial orientation. The tank could further be subject to dynamic forces than tend to move the fuel within the tank, thus possibly impeding a reliable discharge of the fuel of the tank. Other similar situations occur with other types of fluid containers, such as fluid soap containers, fluid food containers, etc., that may be subject to any static and/or dynamic forces that may shift the fluid either permanently or temporarily away from the exit port of the container.
Additionally, the art has to date failed to propose a system that would allow a regulated delivery of a medium from a container, despite a spatial orientation of the container, and especially in circumstances where shifting forces are present.
To date, no solutions have been proposed to circumvent the above disadvantages.
The above disadvantages are overcome by embodiments of the present invention, in which a fluid discharge device for delivering fluid from a container is provided. The device comprises a fluid discharge device for delivering fluid from a container, and a fluid delivery system including a combination of the fluid discharge device coupled to the container for discharging fluid therefrom. The fluid discharge device has a fluid intake portion and a fluid outlet portion. The fluid intake portion may include one or more subparts. The fluid intake portion is adapted to be placed within the container when the fluid discharge device is coupled to the container, and defines either perforations at least at end regions thereof or channels along a length thereof for discharging fluid from the container. The fluid outlet portion is adapted to deliver fluid discharged from the fluid intake portion to a region outside of the fluid intake portion. The fluid outlet portion may extend from the fluid intake portion outside the container when the fluid discharge device is coupled to the container for delivering to a region outside of the container. Alternatively, the fluid outlet portion may corresponds to an exit end of the fluid intake portion, and is adapted to be attached to an exit port in an interior region of the container for delivering fluid to a region outside of the container.
According to embodiments of the invention, the fluid discharge device may have any suitable shape. For example the fluid discharge device may include a single fluid discharge tube, a branching network of fluid discharge tubes, or a star-shaped network of fluid discharge tubes, among others.
According to one embodiment of the invention, the perforations extend along an entire length of the fluid discharge device. The perforations may further be distributed along the fluid discharge device in a staggered manner. According to one embodiment, especially where the container is an intravenous delivery bag, the perforations are defined at least at lateral regions of the fluid discharge device. The perforations may further be cylindrical in shape.
According to a further embodiment, the fluid discharge device comprises a single channeled fluid guide. Alternatively, the fluid discharge device may define any geometric shape as would be readily recognized by one skilled in the art. For example, the fluid discharge device could comprise a branching network of channeled fluid guides, or a star-shaped network of channeled fluid guides. The fluid discharge device may, by way of example, exhibit a cross-sectional profile in a plane perpendicular to its longitudinal axis which is one of X-shaped, star-shaped, Y-shaped or H-shaped, other shapes being possible.
According to a further embodiment, the fluid discharge device is made of a flexible material. According to yet another embodiment, the fluid discharge device is made of plastic. Preferably, and especially when the container is an intravenous delivery bag, the fluid discharge device and intravenous delivery bag are both made of the same flexible plastic material or of similar flexible plastic materials. Another aspect of the present invention comprises a combination comprising a container and a fluid discharge device as described above, the combination in this way constituting a fluid delivery system, wherein the fluid discharge device is coupled to the container for delivering fluid therefrom.
According to one aspect of the invention, the combination above is an intravenous fluid storage and delivery system that comprises: a product storage envelope being generally rectangular and having a top, a bottom, a front wall, a back wall and two oppositely disposed sides; an outer pressure envelope, also being generally rectangular and having a top, a bottom, a front wall, a back wall, and two oppositely disposed sides, the outer pressure vessel being placed so as to completely surround and cover said product storage envelope and further such that the bottom and sides of the outer pressure envelope are in continuous sealing contact with the bottom and sides of the product storage envelope such that a common seam exists around the perimeter of the envelopes; a fluid sealably stored in said product storage envelope; an outlet in communication with said product storage envelope to enable extraction of said fluid from the product storage envelope, the outlet comprising the fluid discharge device; and an inlet in communication with the outer pressure envelope to permit entry of external fluid such as gaseous medium into the outer pressure envelope.
According to another aspect of the invention, the combination above is an intravenous fluid storage and delivery system that comprises: a product storage envelope being generally rectangular and having a top, a bottom, a front wall, a back wall and two oppositely disposed sides; an outer pressure envelope, also being generally rectangular and having a top, a bottom, a front wall, a back wall, and two oppositely disposed sides, said outer pressure vessel being placed so as to completely surround and cover said product storage envelope and further such that said bottom and sides of said outer pressure envelope are in continuous sealing contact with the bottom and sides of said product storage envelope such that a common seam exists around the perimeter of the envelope and further such that the top of said outer pressure envelope is attached to said top of said inner product storage envelope with non-continuous seams and with a spatial gap therebetween, said non-continuous seams permitting the flow of external fluid such as gas from said spatial gap into said outer pressure envelope; a fluid sealably stored in said product storage envelope; an outlet in communication with said product storage envelope to enable extraction of said fluid from said product storage envelope, said outlet comprising the fluid discharge device; an inlet in communication with said outer pressure envelope to permit entry of the external fluid into said outer pressure envelope through said spatial gap; a canister of gas removably connected to said inlet; and a means to control the flow of external fluid or gaseous medium into said inlet.
Advantageously, embodiments of the present invention further encompass a system for a sustained delivery of predetermined flow rates of a medium, such as a gaseous medium to the inlet means of the intravenous delivery system described above. According to one embodiment, the system for a sustained delivery includes an actuator adapted to be depressed for effecting a release of gaseous medium from the canister, and configured such that amounts of depression of the actuator are proportional to corresponding flow rates of gaseous medium being delivered from the canister; and a mechanism coupled to the actuator for effecting various degrees of depression of the actuator and for sustaining the actuator at each of the various degrees of depression for causing a proportional sustained delivery of predetermined flow rates of the gaseous medium from the canister.
Preferably, the mechanism includes a rigid cap disposed on the canister and defines a threaded bore therein; and a correspondingly threaded screw threaded into the threaded bore and coupled to the actuator such that various degrees of threading-in or of threading-out of the screw cause corresponding various degrees of depression of the actuator and sustain the actuator at each of the various degrees of depression.
According to aspects of the present invention, the system for a sustained delivery according to the present invention may be coupled in combination with a intravenous delivery system either including or excluding a fluid discharge device according to the present invention for allowing a sustained delivery of predetermined flow rates of a gaseous medium for effecting a corresponding sustained delivery of intravenous fluid from the system, the above regardless of a spatial orientation of the intravenous delivery system, and/or regardless of the presence of shifting forces.
In the drawings, where like elements are referred to by like reference numerals:
a-9b show different configurations for the embodiment of the fluid discharge device of
a-11d show respective cross-sectional profiles of a fluid discharge device according to
a and 12b show different configurations for the embodiment of the fluid discharge device shown in
Embodiments of the present invention concern a fluid discharge device having a fluid intake portion, and a fluid outlet portion. The fluid intake portion is adapted to be disposed within a container of fluid, and is further either perforated at least at end regions thereof or channeled along a length thereof for discharging fluid. According to one embodiment of the present invention, the perforations are cylindrical, are provided along an entire length of the fluid intake portion, and/or are distributed uniformly along a surface of the fluid intake portion. The fluid outlet portion is adapted to deliver fluid discharged from the fluid intake portion to a region outside of the fluid intake portion. According to one embodiment, the fluid outlet portion is adapted to extend from the fluid intake portion outside of the container. Alternatively, the fluid outlet portion may correspond to an exit end of the fluid intake portion, and be adapted to be attached to an exit port in an interior region of the container.
Advantageously, the fluid discharge device according to embodiments of the present invention has a configuration that allows enhanced access to different regions within the container for discharging fluid therefrom. Embodiments of the present invention are particularly advantageous when used under circumstances where the container is subject to static and/or dynamic forces that may tend to shift the fluid within the container to locations not readily accessible by a conventional exit port on the container, such as, for example, a weight acting on the container, or forces present when the container is being used while in transport. In such situations, embodiments of the fluid delivery system of the present invention advantageously provide enhanced access to different regions within the intravenous delivery bag as fluid shifts within the bag by virtue of the presence of such forces.
Embodiments of the present invention further concern a combination of a fluid discharge device such as the one described above, coupled with a container of fluid, such as, for example, an intravenous delivery bag, a fluid soap container, a fluid food container, or a fuel tank, in order to deliver fluid therefrom.
If the container is part of an intravenous storage and delivery system, it preferably includes, according to the present invention, a product storage envelope covered on both sides by an outer pressure envelope. The seams of both the product storage envelope and the outer envelope are sealed together along their perimeters resulting in the outer envelope forming a double wall around the product storage envelope. A fluid discharge device according to embodiments of the present invention is coupled to the product storage envelope and the outer envelope such that the fluid intake portion of the fluid discharge device is disposed within the product storage envelope, and such that the fluid outlet portion of the fluid discharge device serves to discharge fluid from the fluid intake portion. As pressure is added to the outer pressure envelope, the inner product storage envelope will be compressed, draining fluid from within the product storage envelope through the fluid discharge device until the product storage envelope is evacuated. Because the fluid is being forced out of the product storage envelope through a pressure applied within the outer pressure envelope (as opposed to the fluid being forced out by virtue of the force of gravity only), the fluid will be forced out regardless of the spatial orientation of the intravenous delivery bag of the intravenous storage and delivery system. Thus, the intravenous delivery bag may be placed horizontally, or in any given orientation, and fluid would still be drained from within the product storage envelope as long as pressure is being applied to the region within the outer pressure envelope. The intravenous delivery system proper, exclusive of the fluid discharge device described herein, is described in further detail in both U.S. Pat. Nos. 5,505,708 and 5,656,033, the contents of which are incorporated herein by reference in their entireties.
Advantageously, when used in combination as part of the outlet means in the intravenous storage and delivery system comprising the product storage envelope and outer pressure envelope described above, embodiments of the fluid discharge device according to the present invention allow enhanced delivery of fluid from the product storage envelope at least by virtue of increasing the availability of fluid inlet holes at locations within the intravenous delivery bag for the discharge of fluid from the product storage envelope. The above advantage is especially desirable in circumstances where static and/or dynamic forces, which tend to shift the fluid within the intravenous delivery bag, (both types of forces hereinafter referred to as “shifting forces”) are present.
Referring now to the figures,
Fluid intake portion 12 is adapted to be placed within container 20 and, in the shown embodiment, defines perforations 16 extending the entire length thereof for draining fluid 30 from the container through the perforations. However, according to embodiments of the present invention, the perforations are in any event provided at least at end regions thereof for providing enhanced access to an interior region of the container. The end regions correspond, respectively, to an end region defined on the fluid discharge device near the exit port, such as end region 36 shown in
According to embodiments of the present invention, the perforations may each be cylindrical, and/or may be distributed along a length on the fluid discharge device in a staggered configuration as shown in
Embodiments of the present invention would include a fluid intake portion 12 which defines perforations only at predetermined locations along a length thereof, or only along a portion of a length thereof, and/or perforations shaped and/or distributed differently with respect to those shown in the embodiment of
Another embodiment of a fluid discharge device according to the present invention is shown in
A channeled fluid guide 100 according to embodiments of the present invention may have any cross-sectional configuration where intersecting, longitudinally extending walls define respective channels or grooves therebetween, such as any of the cross-sectional configurations shown by way of example in
Where the combination according to embodiments of the present invention is an intravenous delivery system, such as the one shown in the embodiments of
Embodiments of the fluid discharge device according to the present invention may be used in combination with an intravenous delivery bag as part of an intravenous fluid storage and delivery system. Preferred embodiments of the system is shown in
In both
In the embodiment shown, and as better seen in
The inflation system 4 for inflating a space between the outer pressure envelope 22 and the inner product envelope 24 may be identical or similar to the one described in the above-mentioned U.S. patents, and includes a canister 28 configured to deliver gaseous medium into the outer pressure envelope through gas passage 34 and inlet 32.
In the alternative, the inflation system 4 may, according to embodiments of the present invention, include a system that allows a sustained delivery of predetermined flow rates of a medium, such as a gaseous medium to gas passage 34 of
Advantageously, the system for a sustained delivery as described above may be an inflation system for the sustained delivery of a predetermined flow rate of gaseous medium. Advantageously, such a system may be coupled to inlet 34 according to embodiments of the present invention described above for allowing a proportionally sustained delivery of predetermined amounts of intravenous fluid from the intravenous delivery system described in U.S. Pat. No. 5,505,708 mentioned above to a patient regardless of a spatial orientation of the intravenous delivery system. The use of the system for the sustained delivery of predetermined flow rates of a gaseous medium according to embodiments of the present invention in a system including a fluid discharge device, such as in systems shown in either of
Referring now to
In operation, as the inflation system 4 is actuated, a gaseous medium enters the outer pressure envelope 22, as a result of which product storage envelope 24 is compressed uniformly, as shown for example in
Advantageously, embodiments of the invention as described by way of example with respect to
As noted previously, embodiments of a fluid discharge device according to the present invention are not limited to those shown with respect to
Referring first to
Referring first to
a, 9b, 12a and 12b merely show examples for possible configurations of the fluid discharge device according to the present invention. Other configurations for the fluid discharge device according to the present invention would be within the knowledge of one skilled in the art. In particular, it would also be possible to have a branching network of tubes or channeled guides extending in three dimensions, or a star-shaped network extending in three dimensions, depending on the shape of the container of fluid and the particular circumstances under which the fluid discharge device would be used, as readily recognizable by one skilled in the art.
The present disclosure should not be construed in any limited sense other than that limited by the scope of the claims, having regard to the teachings herein and the prior art being apparent with the preferred form of the invention disclosed herein, and which reveals details of the structure of a preferred form necessary for a better understanding of the invention, and may be subject to change by the skilled person within the scope of the invention without departing from the concept thereof.
Number | Date | Country | |
---|---|---|---|
60546168 | Feb 2004 | US |