WO1995004561A1 - Dispositif permettant de faire varier le volume du contenu d'un contenant - Google Patents

Dispositif permettant de faire varier le volume du contenu d'un contenant Download PDF

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Publication number
WO1995004561A1
WO1995004561A1 PCT/GB1994/001650 GB9401650W WO9504561A1 WO 1995004561 A1 WO1995004561 A1 WO 1995004561A1 GB 9401650 W GB9401650 W GB 9401650W WO 9504561 A1 WO9504561 A1 WO 9504561A1
Authority
WO
WIPO (PCT)
Prior art keywords
receptacle
contents
resilient member
deformation
coiled
Prior art date
Application number
PCT/GB1994/001650
Other languages
English (en)
Inventor
Andrew Daton-Lovett
Original Assignee
The Spring Consortium Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Spring Consortium Limited filed Critical The Spring Consortium Limited
Priority to AU72671/94A priority Critical patent/AU7267194A/en
Publication of WO1995004561A1 publication Critical patent/WO1995004561A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
    • B65D35/24—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor with auxiliary devices
    • B65D35/28—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor with auxiliary devices for expelling contents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/148—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons flexible, e.g. independent bags

Definitions

  • the present invention relates to an apparatus for varying the quantity of contents in a receptacle and in particular, but not exclusively, the invention relates to apparatus for dispensing the contents of a receptacle.
  • the dispensing of the contents of a receptacle is commonly required in industrial and medical processes and the quantity and speed with which the contents have to be dispensed generally dictates the type of dispensing system employed. For example, where large quantities of the contents, for example fluid, are to be dispensed, and economic factors are a relatively minor consideration, it is common to find some form of electrically driven pump being used to dispense the fluid from a reservoir. For much smaller quantities, the well known piston syringe type device has found common use particularly for medical purposes.
  • driven-pump dispensing apparatus is not suitable having regard to the quantity of the receptacle contents to be dispensed, and also due to other factors such as the cost of using and maintaining the apparatus.
  • the piston syringe type devices referred to above are also disadvantageous in that the user has to supply the driving force to dispense the contents in addition to controlling the accuracy with which the contents are to be dispensed.
  • This type of known apparatus is also restricted to use which requires a small quantity of fluid to be dispensed quickly.
  • One form of dispensing apparatus that does not require the user to apply a driving force and so leaves its user free to concentrate on the accuracy and amount of the contents dispensed, and to leave the apparatus "free- running" once initially set up, comprises, a gravity drip- feed bag.
  • a gravity drip- feed bag Such apparatus is widely used in the medical field for the intravenous administration of fluids to a patient. However, it is restricted in that the pressure available for dispensing the fluid is limited to that provided by gravity. Also, the apparatus is awkward and cumbersome in that a separate stand is generally necessary to support the bag above the point at which the fluid is introduced into the patient's body.
  • the present invention seeks to provide simple, and inexpensive apparatus for varying the quantity of contents in a receptacle.
  • apparatus for varying the quantity of contents in a receptacle having an opening, said apparatus comprising deformation means for deforming said receptacle to thereby cause a change in the quantity of contents in said receptacle, wherein said deformation means has a stable state and an unstable state and when in said unstable state seeks to change to said stable state and thereby deform said receptacle so as to cause said change in the quantity of said contents.
  • One way of providing such a deformation means is by way of a resilient member which is resiliently deformable between an at least partially coiled state and an at least partially uncoiled state, said resilient member being operative to deform said receptacle during movement between said states in accordance with its resilience.
  • the invention can advantageously provide for an inexpensive and simple means for discharging the contents of a receptacle.
  • the apparatus of the invention is also reliable and can allow for the discharge of the contents at a predetermined uniform rate.
  • the resilient member is arranged to have a coil portion at one end thereof for rolling or unrolling as required in accordance with its resilience.
  • the resilient member is arranged to deform the receptacle, so as to dispense contents therefrom.
  • the resilience of the member causes it to move from a first, coiled state, to a second, more coiled state.
  • the receptacle can have similar longitudinal dimensions to that of the resilient member.
  • One end of the receptacle is then coiled within a coiled portion of the resilient member and its contents are thereby forced into a region of the receptacle which is, at that time, outside of the coil.
  • the coiled portion of the resilient member serves to act as retaining means for the receptacle.
  • the dimensions of the receptacle need not mirror those of the resilient member and the receptacle.
  • the receptacle can advantageously be formed with a thinner "tail" portion which can be readily located in the coil portion formed at one end of the resilient member.
  • attachment means can be provided for securing the receptacle along at least part of the length of the resilient member.
  • flexible coupling means can be provided for connecting said receptacle to said outlet means.
  • discharge control means is provided at the end of the resilient member remote from the end at which the coil is first formed and, with the receptacle attached to the resilient member for operation, the opening of the receptacle can be located in the region of the flow control element whereby the passage of the receptacle contents can be controlled as required.
  • the discharge control means can have a plurality of different size conduits passing therethrough, which provide for different respective discharge rates.
  • the discharge control means may also comprise brake or escapement means for controlling the speed at which the member rolls or unrolls when coiling or uncoiling as required.
  • means can be provided for forming the inner diameter of said coil portion at a value greater than the natural resting inner diameter of the coil. This can advantageously assist in seeking to expel substantially all of the contents from said receptacle.
  • the resilient member coils at its end remote from the discharge control means and the coil member therefore effectively rolls-up from one end towards another.
  • the receptacle is deformed by the coiling portion and so advantageously maintains pressure on the contents of the receptacle.
  • the resiliently deformable member comprises a coil spring member which can be fully unrolled to receive the receptacle.
  • the unrolled spring member seeks to roll-up to its fully coiled state.
  • the resilient member can be arranged to uncoil in accordance with its resilience so that the receptacle is deformed as the resilient member moves from a first coiled state to a second, less coiled, state.
  • the resilient member may then comprise a flat spring member which is rolled-up so as to uncoil as required in accordance with its resilience.
  • the apparatus includes a surface against which the uncoiling resilient member is arranged to urge the receptacle.
  • the surface is provided by pinch means arranged to engage, and move with, the uncoiling portion of the resilient member.
  • the surface can be provided by an elongate support surface which remains stationary relative to the travel of the coiling portion of the resilient member.
  • the support surface may comprise an inner surface of housing means for the apparatus.
  • Pinch means may also be arranged to be engaged with the coiling portion of a resilient member for movement therewith as it rolls into a fully coiled state in accordance with its resilience.
  • means can be provided so as to compensate for the change in the thickness of the coiled portion that results from the coiling or uncoiling.
  • Such means may comprise resilient mounting means for the above-mentioned pinch means or may comprise tracking means formed in or with housing means for controlling and determining the path of the coiling or uncoiling portion of the resilient member.
  • the coiling or uncoiling portion of the resilient member does not cause a snag or a decrease in its effectiveness as regards the deformation of the receptacle.
  • said pinch means may comprise a pinch roller.
  • the pinch roller can be resiliently mounted with respect to the coiling or uncoiling portion of the resilient member.
  • the resilient member may also be arranged to provide retaining support for the receptacle prior to it being coiled and, as such, the resilient member may comprise a flexible band as described in published United Kingdom patent application GB 2 229 318 A, the contents of which are incorporated herein by reference.
  • the use of such a resilient member as described in that published application is advantageous in view of the stability of the member, particularly in its uncoiled form.
  • said deformation means is arranged to apply a non-constant force to said receptacle and, in particular, one that increases as the deformation of said receptacle increases. Any increase in the resistance presented by said receptacle to a change in state of said deformation means can thereby be advantageously compensated for to maintain any required rate of change of the amount of contents in the receptacle.
  • the resilient member comprises a member which tends to uncoil in accordance with its resilience and whereby such uncoiling is arranged to allow for the increase in volume of a receptacle arranged therewith.
  • the unrolling coiled member causes a decrease in pressure in the receptacle and can thereby be operative to draw the required material into the receptacle.
  • Resilient means can be provided within the receptacle so as to assist its expansion as the coil unrolls.
  • the invention advantageously provides either for simple and inexpensive dispensing apparatus which can dispense a receptacle's contents steadily and continuously if required, or a receptacle- filling apparatus in which a receptacle can be filled or partially filled, as required, in a continuous and steady manner.
  • the coil is arranged to form about an axis which is perpendicular to the longitudinal extent of the resilient member.
  • the resilient member may also comprise a member arranged to move between two coiled states in accordance with its resilience.
  • means may be provided for indicating the quantity of the contents dispersed or still to be dispensed, or the volume still available to receive more of the appropriate material.
  • Such means may comprise markings on the receptacle, or on the resilient member.
  • such indication can be provided by the position of the coiled portion of the resilient member relative to some other part of the resilient member or the housing.
  • the apparatus can include means for expanding said receptacle so as to draw contents therein.
  • the receptacle can be expanded by selectively operable resilient means that, if required, can be similar in form to said deformation means, or said receptacle can be located in housing means from which air can be evacuated.
  • Figure 1 is a side elevational view of apparatus according to one embodiment of the present invention.
  • Figure 2 is a cross-section through the line II-II of Figure 1;
  • Figure 3 is a side elevational view of apparatus according to another embodiment of the present invention.
  • Figure 4 is a cross-section through the line IV-IV of Figure 3;
  • Figure 5 is a side elevational view of apparatus according to a further embodiment of the present invention.
  • Figure 6 is a cross-section through the line VI-VI of Figure 5;
  • Figure 7 is a perspective view of one form of resilient member for use with apparatus embodying the present invention
  • Figure 8 is a perspective view of another form of resilient member for use in apparatus embodying the present invention
  • Figure 9 is a perspective view of apparatus according to yet another embodiment of the present invention.
  • Figure 10 is a perspective view of apparatus according to yet a further embodiment of the present invention,-
  • Figure 11 is a side elevational view of apparatus according to a still further embodiment of the present invention.
  • Figure 12 is a side elevational view of the apparatus of Fig. 1 but with further modifications;
  • Figure 13 is a plan view of a resilient member and receptacle for providing further advantageous features of the present invention,-
  • Figure 14 is a side elevational view of apparatus provided for unrolling a coiled resilient member,-
  • Figures 15a and 15b are cross-sectional views through an embodiment of the present invention particularly arranged for the filling of a receptacle
  • Figures. 16a and 16b are plan and sectional views respectively of one form of material for forming the resilient member of the present invention,-
  • Figures 17a and 17b are plan and sectional views respectively of another material for forming the resilient member of the present invention,- and Figures 18a and 18b show part plan and part elevational views respectively of still another embodiment of the present invention.
  • Figure 1 shows dispensing apparatus 10 according to one embodiment of the present invention for dispensing fluid contained in a flexible receptacle.
  • the receptacle comprises an elongate bag 12, but may of course comprise any suitably deformable receptacle.
  • the dispensing apparatus 10 includes an elongate resilient member, for example a metal spring member 14 which is resiliently deformable so as to be rolled from a completely coiled state to an uncoiled state.
  • the spring member 14 is first deformed, ie. unrolled, to an uncoiled state and then released and its resilience causes it to return, ie. roll-up, to its coiled state by coiling from one end towards the other.
  • the spring member 14 in Figure 1 is shown between these two states during its coiling from one end and thus has a coiled portion 20 which is in the process of rolling in the direction of arrow A towards an, as yet, uncoiled end portion 16.
  • the spring member 14 is uncoiled so as to allow the elongate bag 12, which is full of fluid, to be laid on top of the spring member 14.
  • the end of the spring member 14 which is to first form the coiled portion 20 is then released and, in accordance with its resilience, seeks to form a coiled portion.
  • the initial success of the spring member 14 in this latter respect depends upon the amount of fluid in the bag.
  • the coiled portion 20 can readily be formed at one end of the spring member 14. As illustrated in Figure 1, the coiled portion can be readily formed of alternate layers of the spring member 14 and bag 24.
  • the apparatus of Figure 1 also includes a fluid control valve 18 to which the uncoiled end 16 of the spring member 14 is attached and through which a neck portion 22 of the bag 12 passes.
  • the neck portion 22 that extends downstream of the valve 18 can be preformed to provide an opening for the discharge of fluid from the bag 12 or, alternatively, the neck 22 can be provided sealed so as to be cut open when required.
  • the valve 18 comprises standard known valve means for initiating, controlling and preventing flow of fluid from a receptacle.
  • the pressure exerted by the coiling portion 20 of the spring member 14 on the portion 26 of the bag 12 causes fluid to be dispensed from the bag 12 via the valve 18 and neck 22.
  • the resistance presented by the portion 26 to the further coiling of the spring member 14 is reduced so that the portion 20 of the spring member 14 resumes its coiling motion in the direction of arrow A.
  • This coiling motion serves to maintain a pressure on the contents of the as yet uncoiled portion 26 of the bag 12, and this is sufficient to continue the discharge of the fluid via the valve 18 and the neck 22.
  • the valve 18 remains open so as to allow for complete coiling of the spring member 14 up to the valve 18, substantially all of the fluid in the bag 12 will have been dispensed via the valve 18 and neck 22.
  • a steady uniform flow of fluid can be achieved by merely opening the valve 18.
  • the apparatus so as to achieve a predetermined steady fluid flow merely requires opening of the valve 18 and does not involve the user attending to any further actions to initiate or maintain the flow.
  • an embodiment of the present invention can comprise a resiliently deformable coiled spring having its end that is arranged to form the outer end of the coil attached to a flow control valve 18.
  • the apparatus of Figure 1 may of course be altered so as to include housing means and also means for assisting the retention of the bag 12 on the spring member 14, such as hook and eye fasteners sold under the trade mark Velcro. If the filled bag 12 provides suitable rigidity, then this will serve to retain the portion of the spring member 14 having the portion 26 thereon in a stable uncoiled state. But, if required in some instances, housing, or other support means, may provide a control function so as to prevent premature or inappropriate coiling of the spring member 14.
  • spring member 14 used will vary with different applications but a constant force spring member is particularly advantageous for achieving the uniform discharge of the fluid as discussed above.
  • Figure 2 is a cross-section through the line II-II in Figure 1 and illustrates further the alternate layers of the spring member 20 and emptied bag 24 forming the coil.
  • Figure 2 also provides an indication of the width of the bag 12 and spring member 14 but, of course, it should be appreciated that these dimensions depend on the required size of the apparatus, and the amount of fluid to be dispensed and thus the size of the bag.
  • Figure 3 shows another embodiment of the present invention in which a spring member 114 is attached at one end 116 to a valve member 118 and is arranged to receive a bag 112 thereon.
  • the bag 112 has a neck portion 122 which extends through the valve 118 and by which fluid remaining in a portion 126 of the bag 112 is to be dispensed.
  • the end of the spring member 114 remote from the end 116 forms a coiled portion 120 which includes alternate layers of the spring member 114 and the emptied bag 124.
  • the coiled portion 120 is arranged to travel towards the valve 118 in the direction of arrow 1A to dispense the fluid remaining in the bag portion 126 in a similar manner described above with reference to Figure 1.
  • the apparatus of Figure 3 includes a cylindrical core member 128 about which the coil portion 120 is formed and which is coaxial with the coiled portion 120.
  • the core member 128 may be chosen to have a diameter that is greater than the inner resting diameter of the coil portion 120. This assists in retaining tension in the coil portion 120 which, in turn, serves to assist the evacuation of the contents of the bag 112.
  • a spindle 130 extends through the axis of rotation of the core 128 so at during movement of the coil 120 in the direction of arrow 1A, the core 128 can rotate relative to the spindle 130.
  • the pinch roller 134 is biased into engagement with the underside of the spring member 114 by means of the resilient arms 132.
  • the portion of the bag 112 that is about to enter the coil is pinched between the inner layers of the coil and the roller 134 and this acts to enhance the application of pressure to the contents of the bag 126 and to thereby assist the uniform dispensing of the fluid contents by way of the valve 118 and neck 122.
  • the resilient arm members 132 can compensate for this increase by extending in the radial direction.
  • the pinch roller 134 is also particularly effective in reducing the amount of fluid that remains in the portion 124 of the bag 112 that becomes layered in the coiled portion 120 of the spring member 114.
  • a spring member 214 having a first end portion 216 secured in a housing 240 and adjacent valve means 218, and a second end portion 220 having already formed a coil portion.
  • a bag 212 is provided on the spring member 214 and has a first portion 226 containing fluid yet to be discharged and a second portion 224 from which fluid has already been discharged and which now is coiled in the coiled portion 220 of the spring member 214.
  • the apparatus of this embodiment includes a cylindrical core 228 about which the coil portion 220 is formed and which is coaxial with the axis of rotation of the coiled portion 220 when moving in the direction of arrow 2A.
  • the core 228 can be chosen to have a diameter greater than the inner resting diameter of the coil portion 220.
  • Each side face of the core member 228 has a circular lug 242 extending therefrom along the axis of rotation of the core member 228.
  • Each side wall of the housing 240 is provided with a slot 244 for co-operating with each respective lug 242 so as to define a path of movement for the core 228 and thus the coil portion 220 as it moves in the direction of arrow 2A.
  • each lug 242 rotates in the respective slot 244 in which it is located.
  • the slots 244 determine the distance of the lugs 242, and thus the core 228, from the base of the container 240 and so serve to maintain a separation between the surface of the core 228 and the inner surface of the base of the container 240 that assist the application of the required pressure to the fluid in the portion 226 of the container 214 and also which reduces the amount of fluid remaining in the portion 224 of the bag 214 that has passed into the coil.
  • each track 244 is inclined upwardly in the direction of the valve member 218 and this serves to compensate for the increase in the radius of the coil as it moves in the direction of arrow 2A. Obstruction to the coil portion as it increases in diameter during its movement is also prevented.
  • An alternative to the provision of a core member having a larger diameter than the inner resting diameter of the coil portion is to open out the inner-most coil to an increased diameter and securing the inner-most coil in such a position by bonding it to the adjacent coil layer of the coil portion.
  • Figure 7 is a perspective view of a resilient member for use in apparatus embodying the present invention and, in particular, shows further detail of the resilient member 14 employed in the apparatus illustrated in Figure 1.
  • the member 14 in Figure 7 is an advantageous alternative to housing or other support means for stabilizing the member during coiling/uncoiling.
  • the spring member 14 of Figure 7 is shown in a similar state as that in Figure 1, ie. that which arises when the bag 12 is partially drained and having a coil portion 20 and an as yet uncoiled portion 16, for location to the valve member 18.
  • the spring member 14 is formed such that the portion yet to be coiled exhibits a curvature having a radius of curvature perpendicular to the longitudinal extent thereof, and thus perpendicular to the direction in which the coil portion 20 moves.
  • the formation of the spring member 14 in this manner serves to enhance the stability of the uncoiled portion by allowing only that portion of the spring member 14 which is immediately adjacent to the coil portion 20 to deform so as to become part of the coil.
  • the curvature of the spring member 14 in a direction perpendicular to that of the movement of the coil portion 20 serves to resist, but not prevent, the formation of a complete coil in accordance with the spring member's resilience.
  • FIG. 9 is a perspective view of an example of such an embodiment of the present invention and comprises a spring member 314 having a coil portion 320 and an as yet uncoiled portion 316 extending in a tubular manner so as to enclose at least part of that portion of the bag 312 which is still to be emptied.
  • the bag 312 has a neck 322 which extends from the end of the tubular portion 316.
  • such an example of apparatus embodying the present invention comprises simple means for providing discharge apparatus having a rigid and self-supporting nozzle portion, for example that formed by the tubular section 316, and which is capable of delivering a steady discharge of the bag's contents.
  • the spring member or flexible band, can exhibit slight curvature when extended or tight curvature when rolled into a coil.
  • the use of such a spring member removes the need for containment means, guides, rollers etc. since controlled sequential unrolling of the spring is readily achieved and comprises an inherent quality of such a member.
  • the spring member also exhibits safety features since it is in a curled state about a longitudinal axis or a coiled state about a transverse axis and this limits the dimensions of the region of the member that is in a flat and potentially hazardous state.
  • FIG. 8 is a perspective view of an example of such a spring member 214 which, for example, is provided in the apparatus illustrated in Figure 5, and, again is illustrated having a coil portion 220 and an uncoiled portion 216.
  • the spring member 214 has a plurality of parallel fibres 217 extending transversely along its length and each of which extends in a direction perpendicular to the direction of travel of the coil portion 220.
  • the fibres can be contained in a matrix material which is highly flexible and exhibits little or no viscose damping and so does not act against the rolling or unrolling of the spring coil.
  • the fibres which can be pre- stressed if desired, prevent poison-stress derived curvature of the uncoiled portion 216 of the spring member 214.
  • FIG. 10 An example of such an embodiment is illustrated in Figure 10 and comprises dispensing apparatus 410 formed of a receptacle 412 having upper and lower walls 413, 415 sealed at their edges 417 and each of which comprises a resilient elongate spring member which is resiliently deformable from a substantially completely coiled state to an unrolled, and thus uncoiled, state.
  • dispensing apparatus 410 formed of a receptacle 412 having upper and lower walls 413, 415 sealed at their edges 417 and each of which comprises a resilient elongate spring member which is resiliently deformable from a substantially completely coiled state to an unrolled, and thus uncoiled, state.
  • the end of the container remote from an outlet hose 422 seeks to form a coil portion.
  • the coil portion increasing in radius as it rolls towards the nozzle portion 419 and as the contents of the receptacle 412 are dispensed via the hose 422.
  • the resilient member could form solely that wall portion of the receptacle which is to become the outer, or convex, surface of the coil portion.
  • the wall portion 413 of the container 412 could then be formed of any appropriate deformable material which can be sealed at its edges 417 to the resilient member.
  • the resilient member could be provided internally of the receptacle itself. Such enclosure of the resilient member also serves to overcome safety hazards that could arise through the use of an exposed spring such as a metal spring.
  • Apparatus embodying the present invention is also shown in Figure 11 and, in this case, comprises a resilient member 420 which is arranged to unroll from its coiled state illustrated in Figure 11 to a less coiled, or uncoiled, state in the direction of arrow 5A.
  • the resilient member 420 is arranged to exert pressure on fluid contained in a bag 512 so as to discharge the fluid via a control valve 518 and neck portion 522 of the bag.
  • the outer end of the coiled spring member 520 is attached by attachment means 521, for example rivet or screw means, to the base of a housing 523 (not shown completely) .
  • containment means such as that provided by the core member of the apparatus of Figure 3 and Figure 5 is required so as to cause the coiled spring member 520 to unroll in the manner required but such containment apparatus is not shown in Figure 11 for reasons of clarity.
  • the surfaces of the coiled spring member 520 can be formed with a high coefficient of friction.
  • such surfaces can be provided with mutually co-operable engagement formations, such as interlocking members.
  • interlocking members can assist in retaining the coiled portion of the spring member 520 in a coiled state and to assist the uncoiling of the spring member 520 in a controlled manner along the complete length of the bag 512.
  • the spring member 520 does not then simply spring open when in the position shown in Fig. 11 and avoid dispensing the contents.
  • Such an arrangement allows for controlled sequential unrolling of the coiled spring 520, as does the use of a flexible band described in the aforementioned UK patent document 2 229 318A.
  • a resilient member which is arranged to unroll from a coiled state to a less coiled, or completely uncoiled, state in accordance with its resilience, can be provided which is arranged to have a receptacle provided thereon, formed at least partially thereby or formed there around.
  • the use of the device having an exposed metal spring might, in some instances, be considered inappropriate or hazardous and such dangers might be even more apparent in situations where repeated cocking of the resilient member is required.
  • the member can be coated with an appropriate material.
  • Such material may advantageously comprise a fibre-based composite with a rubber or plastic matrix.
  • the unrolling of the resilient member serves to allow the available volume in the receptacle to increase, and thereby cause the pressure therein to decrease so that the fluid, or other suitable material, can be drawn into the receptacle by way of a suitable inlet opening, which may, for example, be similar to the valve and neck apparatus described above.
  • resilient means such as hinged sheet springs or spring strips can be provided in the receptacle.
  • apparatus embodying the concept of the present invention can be provided in many different forms and with many varied features which can, for example, depend on the nature of the receptacle contents.
  • the resilient member and valve member can be provided so that the receptacle's contents can be dispensed in spray form.
  • Such apparatus is particularly advantageous when compared with known spray dispensers in that a compressor of pressurised gas reservoir is not required, therefore rendering the invention ecologically acceptable.
  • the contents can be delivered irrespective of the orientation of the apparatus, unlike most conventional spray devices which do not work once inverted or held beyond a particular angle to the vertical.
  • the apparatus could be provided with a trigger by which the resilient member is released so as to roll in accordance with its resilience and, also, such trigger action could also serve to rupture the receptacle so as to form the opening for discharge of its contents.
  • the apparatus of the present invention could advantageously form a simple and inexpensive fire extinguisher.
  • the apparatus could be adapted to deliver gases or fine powders in gaseous-suspension form and, for example, could therefore form a dry powder fire extinguisher.
  • the apparatus can be arranged to operate with a full sealed receptacle which can then be ruptured or otherwise opened, for example by cutting open the neck or nozzle portion, or it can be arranged for use with an empty receptacle which first has to be filled.
  • the resilient member can be arranged to have a suitably limited mechanical strength such that it can be deformed against its resilience by applying a pressurised feed of the material into the receptacle by way of the opening.
  • the resilient member is deformed and so provided with the appropriate mechanical potential energy to cause discharge of the receptacle's contents as required.
  • the embodiments of the invention discussed above comprise a spring member which can be coiled in the direction of its longitudinal axis, in situations where higher pressures may need to be exerted on the receptacle, or greater volumes of the receptacle contents are to be dispensed, the resilient member can be arranged to coil in the direction of its shorter axis. This seeks to increase the pressure which can be obtained from a particular resilient material.
  • the pressure applied to the receptacle can also be increased by employing more than one resilient member and, particularly where the required travel of the coil portion of the resilient member is small, the use of low-friction materials or lubricants can be of assistance.
  • the grip or the receptacle provided by the coil portion can be employed to retain the receptacle on the resilient member although, as noted above, other securing means could also be used.
  • Fig. 12 shows the embodiment of Fig. 1 of the present invention but with further features included so as to provide further advantages.
  • One potential limitation with the apparatus of Fig. 1 arises due to the coiling of a bag having an upper and lower wall surface.
  • the lower wall surface being located within each turn of the coil on the outside of the upper surface will extend within the coil for a greater distance than the upper surface.
  • the spring member 14 and bag 12 coil there is a natural tendency for the front of the bag to move forward relative to the front of the spring member 14 located adjacent to the fluid control valve 18. Any such problem is overcome by the use of features illustrated with reference to Fig. 12.
  • a fastening member 17 is employed to fasten the rear portion of the bag 12 to the rear portion of the spring member 14 and a flexible tubular coupling 25 is provided between the front end of the bag 12 and the valve 18.
  • the flexible coupling 25 can comprise any appropriate form of sliding coupling for example an elastically deformable tube member.
  • An alternative to the use of features as disclosed with reference to Fig.12 is to secure the front of the bag 12 adjacent the valve 18, or provide a rigid coupling therebetween, and to form the spring member 14 with low- friction surfaces which allow for slippage between the bag 12 and the coiling portion 26 of the spring member 14.
  • Fig. 13 is a plan view of a spring member arranged to coil about a receptacle.
  • the spring member comprises a coil portion 610 and a flat forwardly extending portion 612 which receives a bag having a contents-containing region 614 which comprises a narrow section 616 upstream (in the direction of movement of the coil portion 610 in the direction of arrow A) of a wider contents containing portion 618.
  • the section of the bag comprising the narrow portion 616 only contains a minor volume of the contents relevant to the volume contained by the wider portion 618.
  • the provision of such a bag having sections of different capacity along its length in the direction of travel of the coil portion of the spring 610 has particular advantages associated with the movement and control of the coiling spring.
  • the coiling of the spring 610 can be employed to drive functional requirements of the apparatus over and above the mere delivery of the contents of the bag.
  • the moving coil of the spring can be arranged to advance and/or retract a needle member associated with the outlet of the bag.
  • the driving power provided by the movement of the coiling spring 610 can be employed to advance the position of a needle, or some other applicator, associated with the outlet of the bag so that once the coiling spring 610 reaches the portion of the bag 618 having a content containing section extending across the width of the bag, the needle has previously been moved into an appropriate position and expulsion of the contents of the wider section 618 of the bag can commence as appropriate.
  • the pattern presented by the actual contents containing portion of the bag can be varied, when considered in plan view, so as to control the rate and extent of movement of the coiling spring as required. In the embodiment illustrated in Fig.
  • the use of the narrow content-containing section of the bag 616 is useful for priming the needle prior to the dispensing of the complete contents of the bag.
  • the Fig. 13 embodiment could be achieved by attaching the needle to a plate member which is arranged to slide along the side the bag and which plate member is driven by means of a lug protruding from a coil member provided in the centre of the coiling spring 610.
  • a plate can be provided with track, or channel, means formed in its surface which, combined with a lug member which is flexibly coupled to the aforementioned core member in such a manner so as to allow for radial movement in a direction substantially perpendicular to the direction of travel of the coiling spring 610, can therefore allow for a variety of movements of a needle to be achieved.
  • the lug can be arranged to be released from the plate by movement in an appropriate radial direction and the needle can then be drawn back into the body of the device by means of a resilient return member, for example a return spring.
  • a movable needle it is particularly advantageous to connect the needle to an outlet of the bag by way of a flexible conduit member such as a flexible tube having an internal bore of similar dimensions to the bore of the needle.
  • a flexible conduit member such as a flexible tube having an internal bore of similar dimensions to the bore of the needle.
  • the apparatus can be provided with means for programming the movement of the coiling spring.
  • the resilient member is arranged to exhibit a non-constant force on the receptacle.
  • a resilient member can be achieved by providing variations in the radius of curvature of the member, or by providing variations in the width or thickness of the member.
  • This provides for a driving member for the expulsion of contents from a receptacle which can execute a pre-programme series of pressure variations as the resilient member coils or uncoils.
  • Elastomeric members can be advantageously pre ⁇ programmed in this manner by varying the tension on the elastomer and/or the rolling characteristics of the incompressible layers or matrix.
  • the resilient member can be advantageously formed so as to provide for an increase in the force exerted on the receptacle and its contents so as to counter-act any increase in the resistance to the rolling motion of the coil portion of the resilient member presented by the receptacle. In this manner, the rate of which the contents of the receptacle is discharged can be maintained at a substantially constant level.
  • the resilient member may have a width, or thickness, that varies in the direction of motion of the coiling portion thereof or alternatively, or in addition, the resilient member can be formed from tempered steel which has been subjected to known heat treatment so as to exhibit a variation in the force exerted by the coiling spring during the motion of the coiling portion thereof.
  • Fig. 14 is a side elevational view of a housing apparatus 620 for use with the embodiment of Fig.l of the present invention.
  • the apparatus comprises a handle member 622 having a lever 624 extending therefrom and into a spring housing 626 for engagement with a core member 628 which is arranged to be formed within the coiling portion 20 of the spring member 14 of Fig. 1.
  • the housing apparatus of 620 of Fig. 14 serves as a means for unwinding, or cocking, the resilient member so as to allow for replacement of the receptacle thereon.
  • the hand portion of 622 is pivotally mounted by way of a pivot means 629 to the spring housing 626 such that when the handle portion 622 is pivoted in the direction of arrow B, the lever 624, and thus the core 628, are drawn rearwardly along the spring housing 626 in the direction of arrow C.
  • This serves to unwind the coil portion 20 of the spring member 14 of Fig. 1 as is required for placement of the receptacle 12 thereon.
  • the apparatus of Fig. 1 is to be positioned in the housing 620 of Fig. 14 so that the nozzle 18 is located to the left of the housing 620 as shown in Fig. 14.
  • Figures 15a and 15b illustrate further features of the embodiment of the present invention which prove particularly advantageous for recharging, or filling, the receptacle.
  • a receptacle and spring member similar to that described with reference to Fig. l, are located in a telescopic housing 632 having two slidably engaged cylindrical portions 634, 636 (see Figure 15b) .
  • the apparatus is shown with the resilient member in its maximum coiled state and with the receptacle empty and the contents having been expelled via the slow control valve.
  • the sliding engagement between the two cylindrical members 634, 636 of the telescopic housing 632 is arranged to be completely or substantially air ⁇ tight.
  • the vacuum thereby formed causes entry of the fluid into the receptacle via the control valve and this filling of the receptacle serves to urge the coiled spring portion to the left as shown in Figure 15b so as to achieve self-cocking of the spring member.
  • engagement means can be provided between the outer cylindrical portion 634 of the housing 632 which serve to engage the coil member associated with the coil portion of the resilient member so as to assist in the cocking thereof.
  • Such apparatus can prove to be particularly suitable for use with medical injection or infusion devices in which the receptacle can be attached to a standard syringe needle and in which the receptacle can then be filled from a rubber-diaphragm closed bottle of a nature normally used to store such fluid.
  • This can advantageously assist in reducing, or avoiding, the need to supply fluid drugs in any particular form of packaging and obviates the need for any special training requirements for the staff or patients since the procedure is somewhat similar to that used for drawing fluid into a syringe.
  • resilient coiling/uncoiling member can be formed from elastomers.
  • elastomers Such a member could be made from a layer which is relatively incompressible in the desired direction of coiling but which offers little opposition to the coiling force, and which is bonded to an elastomer layer which is stretched, or pre-tensioned, to provide for the required coiling/uncoiling force.
  • the incompressible layer can be formed from a composite in which the isotropy of the material is controlled by the location and direction of the fibres.
  • Figure 16a and 16b are cross-section along the lines b-b of Figure 16a and shows a stretched elastomer layer 642 located above a layer of fibres 640. The direction in which the fibres 640 extend is also illustrated in Figure 16a.
  • a series of blocks, or rods which are hinged and joined by tape, or embedded, in a flexible matrix so as to form a material with the desired characteristics, can be provided.
  • Such a material 644 is illustrated in Figure 17a and 17b and comprises a series of hinged blocks or rods 646 which are tape, or fibre, linked and located below a stretched elastomer layer 648.
  • FIGs 18a and 18b illustrate one particular complete construction for apparatus embodying the present invention.
  • the apparatus comprises an infusion pump 650 which, from a cutaway portion of the plan view of Figure 18a, and the part elevational view of Figure 18a, employs a spring member 652 arranged to coil in the direction of arrow A in Figure 18a so as to roll-up a flexible bag 654 containing a liquid drug.
  • the drug is expelled from the flexible bag 654 via a nozzle 656 and outlet valve 658 and subsequently through an outlet tube 660.
  • the housing for the infusion pump 650 can be provided in any particular form which may advantageously provide for a snug-fit against an appropriate part of the human body.
  • the apparatus may be arranged such that a plurality of separate receptacles can be deformed by the resilient member and, if required, the contents of the receptacles can be arranged to be mixed at the point of discharge.
  • advantageous features may comprise a transparent receptacle and/or container for viewing the contents, means for metering the change in contents and means for indicating the amount of contents in the receptacle.
  • the metering means can comprise a plurality of different sized passages, one of which is selected as required for the charging or discharging of the receptacle.
  • the metering means can comprise rotary- digital-watch type escapement means.
  • the contents indication means may comprise markings on the receptacle, or a housing if employed.
  • the position of the coil portion can be employed on an indication of the quantity of contents in the receptacle.
  • Indicator means can then be provided for movement with the coil portion.
  • a variety of means can be provided for achieving the filling, or re-filling, of the receptacle.
  • a selectively operable resilient member can be employed so as to uncoil (or as required coil) the resilient member illustrated in the drawings in a manner so as to allow for the refilling of the receptacle and said selectively operable resilient member can then be removed or disengaged so that discharge of the contents of the receptacle can be achieved as described with reference to the drawings.
  • the present invention can be embodied in dispenser apparatus for use in any situation where an appropriate material, whether in fluid, gel or other form, is required to be dispensed and, as an example of such diverse application, the present invention could be embodied in a self-pressurising water supply means where mains water is not readily available, for example in a caravan.
  • Apparatus embodying the present invention is inherently reliable, simple and inexpensive to manufacture and maintain.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

L'invention concerne des éléments permettant de faire varier le contenu d'un contenant (12, 112, 212, 312, 412, 512) et comprend un élément élastique (14, 114, 214, 314) disposé pour déformer ledit contenant (12, 112, 212, 312, 412, 512) de manière à en faire varier le contenu. Cet élément élastique (14, 114, 214, 314) peut être placé de manière à déformer ledit contenant (12, 112, 212, 312, 412, 512) pour en expulser le contenu ou bien pour le remplir. L'élément élastique (14, 114, 214, 314) peut comprendre un élément plat faisant ressort monté de manière à passer d'un état déroulé instable à un état roulé stable et à enrouler de ce fait ledit contenant (12, 112, 212, 312, 412, 512) pour en expulser le contenu. Des éléments de commande de clapet (18, 118, 218, 518) peuvent être associés à une ouverture pratiquée dans ledit contenant (12, 112, 212, 312, 412, 512) de manière à pouvoir piloter de façon sélective l'expulsion du contenu dudit contenant (12, 112, 212, 312, 412, 512). Le dispositif peut également comporter des éléments (632) pour remplir ledit contenant (12, 112, 212, 312, 412, 512) d'un contenu devant ensuite en être expulsé, ainsi que des parties (616, 618) conformées sur ledit contenant (12, 112, 212, 312, 412, 512) de manière à moduler la facilité avec laquelle l'élément faisant ressort (14, 114, 214, 314) peut enrouler ledit contenant (12, 112, 212, 312, 412, 512). Pendant les différents passages d'un état déroulé à un état enroulé dudit ressort (14, 1114, 214, 314), là où ledit contenant (12, 112, 212, 312, 412, 512) empêche qu'il y ait une résistance réduite au mouvement dudit ressort (14, 114, 214, 314), ce dernier peut être placé de manière à entraîner un élément dudit dispositif, par exemple une aiguille pouvant être sortie et rentrée.
PCT/GB1994/001650 1993-08-06 1994-07-29 Dispositif permettant de faire varier le volume du contenu d'un contenant WO1995004561A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU72671/94A AU7267194A (en) 1993-08-06 1994-07-29 Apparatus for varying the quantity of contents in a receptacle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB939316403A GB9316403D0 (en) 1993-08-06 1993-08-06 Apparatus for varying the quantity of contents in a receptacle
GB9316403.6 1993-08-06

Publications (1)

Publication Number Publication Date
WO1995004561A1 true WO1995004561A1 (fr) 1995-02-16

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GB (1) GB9316403D0 (fr)
WO (1) WO1995004561A1 (fr)

Cited By (11)

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WO1997035706A1 (fr) * 1996-03-25 1997-10-02 Rolatube Technology Limited Element etirable
WO2007107786A1 (fr) 2006-03-22 2007-09-27 The Technology Partnership Plc Pompe à perfusion transportable de type patch cutané à réservoir spirale repliable
WO2008134793A1 (fr) * 2007-05-07 2008-11-13 Marek Szymanski Appareil de distribution de liquide
WO2011026738A1 (fr) * 2009-09-02 2011-03-10 Sanofi-Aventis Deutschland Gmbh Récipient pour médicament
CN103228311A (zh) * 2010-10-27 2013-07-31 Fbe公司 便携式流体加温器
WO2014001311A1 (fr) * 2012-06-27 2014-01-03 Sanofi-Aventis Deutschland Gmbh Récipient de médicament et dispositif d'administration de médicament
CN104001237B (zh) * 2008-11-25 2017-01-11 梅里迪安医学技术公司 自动注射器装置
EP3210570A1 (fr) * 2016-02-29 2017-08-30 Biosense Webster (Israel), Ltd. Dispositif de changement de pression pour un implant mammaire
US10653517B2 (en) 2017-11-08 2020-05-19 Mentor Worldwide Llc Adjustable implant
US10751163B2 (en) 2017-09-01 2020-08-25 Mentor Worldwide Llc Adjustable implant
US10751165B2 (en) 2017-12-12 2020-08-25 Mentor Worldwide Llc Adjustable implant

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US3647117A (en) * 1969-08-22 1972-03-07 Thomas S Hargest Apparatus for intravenous feeding and the like
US3670926A (en) * 1969-09-11 1972-06-20 Power Technology Corp Intravenous feeding apparatus
EP0248538A1 (fr) * 1986-05-06 1987-12-09 David P. Colvin Procédé et dispositif d'infusion
EP0289361A1 (fr) * 1987-05-01 1988-11-02 Product Innovation Holdings Limited Appareil d'infusion médicale

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US3647117A (en) * 1969-08-22 1972-03-07 Thomas S Hargest Apparatus for intravenous feeding and the like
US3670926A (en) * 1969-09-11 1972-06-20 Power Technology Corp Intravenous feeding apparatus
EP0248538A1 (fr) * 1986-05-06 1987-12-09 David P. Colvin Procédé et dispositif d'infusion
EP0289361A1 (fr) * 1987-05-01 1988-11-02 Product Innovation Holdings Limited Appareil d'infusion médicale

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6217975B1 (en) 1996-03-25 2001-04-17 Rolatube Technology Limited Extendible member
CN1072101C (zh) * 1996-03-25 2001-10-03 罗拉丘柏技术有限公司 一种可伸展片及其制备方法
WO1997035706A1 (fr) * 1996-03-25 1997-10-02 Rolatube Technology Limited Element etirable
WO2007107786A1 (fr) 2006-03-22 2007-09-27 The Technology Partnership Plc Pompe à perfusion transportable de type patch cutané à réservoir spirale repliable
US8123725B2 (en) 2006-03-22 2012-02-28 The Technology Partnership Plc Portable infusion pump of the skin patch type with spiral collapsible reservoir
US8550301B2 (en) 2007-05-07 2013-10-08 Marek Szymanski Liquid dispensing apparatus
WO2008134793A1 (fr) * 2007-05-07 2008-11-13 Marek Szymanski Appareil de distribution de liquide
AU2008247299B2 (en) * 2007-05-07 2013-08-01 Marek Szymanski Liquid dispensing apparatus
CN104001237B (zh) * 2008-11-25 2017-01-11 梅里迪安医学技术公司 自动注射器装置
WO2011026738A1 (fr) * 2009-09-02 2011-03-10 Sanofi-Aventis Deutschland Gmbh Récipient pour médicament
CN103228311A (zh) * 2010-10-27 2013-07-31 Fbe公司 便携式流体加温器
US9962501B2 (en) 2010-10-27 2018-05-08 Fbe Pty Ltd Portable fluid warmer
EP2632515A4 (fr) * 2010-10-27 2014-07-02 Fbe Pty Ltd Chauffe-liquides portatif
EP2632515A1 (fr) * 2010-10-27 2013-09-04 Flinders Medical Centre Chauffe-liquides portatif
JP2013540536A (ja) * 2010-10-27 2013-11-07 フリンダース メディカル センター 携帯型流体加温器
US10744276B2 (en) 2010-10-27 2020-08-18 Fbe Pty Ltd Portable fluid warmer
KR101856804B1 (ko) * 2010-10-27 2018-05-10 플린더스 메디컬 센터 휴대용 유체 가온장치
WO2014001311A1 (fr) * 2012-06-27 2014-01-03 Sanofi-Aventis Deutschland Gmbh Récipient de médicament et dispositif d'administration de médicament
EP3210570A1 (fr) * 2016-02-29 2017-08-30 Biosense Webster (Israel), Ltd. Dispositif de changement de pression pour un implant mammaire
JP2017153957A (ja) * 2016-02-29 2017-09-07 バイオセンス・ウエブスター・(イスラエル)・リミテッドBiosense Webster (Israel), Ltd. 乳房インプラント用の圧力チェンジャ
US10548712B2 (en) 2016-02-29 2020-02-04 Biosense Webster (Israel) Ltd. Pressure changer for a breast implant
CN107126300A (zh) * 2016-02-29 2017-09-05 韦伯斯特生物官能(以色列)有限公司 用于乳房植入物的压力更改器
US11234808B2 (en) 2016-02-29 2022-02-01 Biosense Webster (Israel) Ltd. Pressure changer for a breast implant
US10751163B2 (en) 2017-09-01 2020-08-25 Mentor Worldwide Llc Adjustable implant
US11491005B2 (en) 2017-09-01 2022-11-08 Mentor Worldwide Llc Adjustable implant
US10653517B2 (en) 2017-11-08 2020-05-19 Mentor Worldwide Llc Adjustable implant
US10751165B2 (en) 2017-12-12 2020-08-25 Mentor Worldwide Llc Adjustable implant
US11678972B2 (en) 2017-12-12 2023-06-20 Mentor Worldwide Llc Adjustable implant

Also Published As

Publication number Publication date
GB9316403D0 (en) 1993-09-22
AU7267194A (en) 1995-02-28

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