EP0468336A1 - Ausdehnbarer Sack - Google Patents

Ausdehnbarer Sack Download PDF

Info

Publication number
EP0468336A1
EP0468336A1 EP91111788A EP91111788A EP0468336A1 EP 0468336 A1 EP0468336 A1 EP 0468336A1 EP 91111788 A EP91111788 A EP 91111788A EP 91111788 A EP91111788 A EP 91111788A EP 0468336 A1 EP0468336 A1 EP 0468336A1
Authority
EP
European Patent Office
Prior art keywords
bag
compartments
loop configuration
compartment
fluid
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP91111788A
Other languages
English (en)
French (fr)
Inventor
Roger Stewart Matthews
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BEAKBANE Ltd
Original Assignee
BEAKBANE Ltd
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 BEAKBANE Ltd filed Critical BEAKBANE Ltd
Publication of EP0468336A1 publication Critical patent/EP0468336A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm type

Definitions

  • This invention relates to an expandable bag.
  • an expandable bag adapted to be expanded in an expansion direction by the introduction of fluid into the bag under a pressure greater than the pressure externally of the bag, the bag comprising a plurality of compartments each being generally of loop configuration (as herein defined), each compartment having at least in part, flexible walls, there being passage means to permit fluid introduced into the bag at one end thereof, to flow into each of the compartments.
  • loop configuration we mean that in plan view the compartments each present a closed figure with a centre void, the outer periphery of the closed figure being one of circular, other curved, polygonal, a combination of at least one curve and at least one straight edge.
  • a bag according to the first aspect of the invention and an elongate housing which contains a reaction member which is moved along the longitudinal axis of the housing by the bag as the bag expands.
  • an expandable bag 10 comprises a plurality of loop shaped compartments 11-20, each of which in plan view presents a generally closed figure with a centre void, the outer periphery P of the figure being in this example, generally circular.
  • Each compartment 11-20 has flexible side walls 11 a, 11 b, which in this example comprises polurethane coated nylon fabric, but may comprise PVC, polypropylene or other unsupported rubber or plastic film or plastic or rubber covered fabric sheet which is welded or adhered to the other side wall as indicated at 22 and 23 to provide the compartments 11-20.
  • a web 24 which comprises a double thickness of material fixed together again by welding or adhesive.
  • a relatively rigid end element 26 is provided, and at the other end 27 of the bag 10, a further generally rigid end element 28 is provided.
  • the element 28 is provided with a threaded stud 29 to enable the element 28 to be secured to a reaction member R.
  • the end element 26 is provided with a central opening in which is received an inlet assembly 31 comprising a boss having an inlet passageway 31 a which is adapted to be connected to a source of pressurised fluid, in this example, compressed air.
  • a source of pressurised fluid in this example, compressed air.
  • the opening could be offset from the centre axis 32.
  • the loop configuration compartments 11-20 are arranged so that their centres lie along the common centre axis 32, with the side walls 11 a, 11 b, of adjacent loop configuration compartments 11-20 being secured together by welding and/or adhesive as desired. Extending from each of the compartments 11-20 are first passages 35,36, of a passage means, which passages 35,36, permit the flow of fluid between the compartments 11-20.
  • compartments 37-45 are defined between the webs 24 of adjacent compartments 11-20, and second passages 50 of the passage means are provided from each of the compartments 37-45 into the next adjacent further compartment, again to provide for the flow of fluid throughout the bag 10.
  • an end compartment 52 is provided between the web 24 of the compartment 20 and the element 26, there being further a passage 53 between the compartment 20 and the end or inlet compartment 52, and a yet further passage 54 is provided from the further compartment 45 and compartment 52, to permit fluid which is introduced through the inlet assembly 31 to flow into each of the loop configuration compartments 11-20 and further compartments 37-45.
  • a further end compartment 56 is provided between the web 24 of the compartment 11 and the end element 28, with still further passages 58 from compartment 37 into end compartment 56.
  • the bag 10 may be collapsed from the condition shown to a flatter condition when fluid is expelled from the bag 10, but that the bag 10 may be expanded to the condition shown by introducing fluid through the inlet assembly 31 under a pressure greater than the pressure externally of the bag, the fluid flowing into each of the loop configuration compartments 11 to 20 and further compartments 37 to 45 and end compartments 52 and 56 to expand the bag in a direction generally common with the axis 32.
  • Each of the passages 35,36,50,53,54 and 58 may have an eyelet support element as indicated in the drawings, which eyelets serve to seal the edges of the material at the periphery of the passages.
  • the bag 10 is shown received within a housing H with the end element 26 fixed relative to an end wall W of the housing H and the end element 28 of the bag 10 and the reaction member R being free to move within the housing H in the direction of the axis 32.
  • the stud 29 may be affixed to the reaction member R so as to move the reaction member R along the housing 11 longitudinally in the direction of centre axis 32, in the manner of a piston in a cylinder.
  • the compartments 11-20 are each generally annular in configuration and thus the housing H may be generally cylindrical.
  • the outer periphery P of each compartment 11-20 being circular or other curved, polygonal or any combination of at least one curve and at least one straight edge.
  • the bag 10 may have any number of loop configuration compartments 11-20 as desired preferably centred on the axis 32 so that the bag will expand in the direction of axis 32.
  • the bag 10 comprises PVC, polypropylene or other plastic film or plastic covered fabric e.g. nylon material
  • the bag may be made in other materials, and constructed in another appropriate manner.
  • the bag could be made by moulding at least parts of the bag to a desired configuration.
  • arrows show the fluid flow paths during expansion of the bag.
  • fluid is withdrawn from the bag 10 via inlet assembly 31 such that fluid flow is in an opposite direction to the arrows.
  • the reaction member R may be used to push an item along the housing H, or to extrude a substance through an opening O in an end wall W2 of the housing H, although the expansion bag 10 described has many other uses as an actuator.
  • the bag 10 expands in a linear direction
  • the bag 10 may be adapted to expand in any other direction e.g. along a curve or another preset path.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Bag Frames (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP91111788A 1990-07-27 1991-07-15 Ausdehnbarer Sack Withdrawn EP0468336A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9016589 1990-07-27
GB909016589A GB9016589D0 (en) 1990-07-27 1990-07-27 Expandable bag

Publications (1)

Publication Number Publication Date
EP0468336A1 true EP0468336A1 (de) 1992-01-29

Family

ID=10679806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111788A Withdrawn EP0468336A1 (de) 1990-07-27 1991-07-15 Ausdehnbarer Sack

Country Status (2)

Country Link
EP (1) EP0468336A1 (de)
GB (2) GB9016589D0 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009048780A1 (de) * 2009-10-08 2011-04-28 Festo Ag & Co. Kg Faltenbalganordnung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2349917B (en) * 1999-05-11 2003-12-10 Mangar Int Ltd Fluid operable ram

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE671148C (de) * 1936-01-11 1940-04-29 Adolf Brendlin Balgmembrankolben
US2456869A (en) * 1944-04-12 1948-12-21 Clarence E Fowler Hydraulic pulsator system
FR1155697A (fr) * 1955-08-25 1958-05-07 Dispositif pour la transmission d'efforts
DE2061596A1 (de) * 1970-12-15 1972-06-29 Daimler Benz Ag Vorrichtung zum Verschieben eines in einem Zylinder geführten Kolbengliedes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB791717A (en) * 1956-02-08 1958-03-12 Karl Olavi Vartia Method of construction utilizing inflatable fluid containers
GB1206414A (en) * 1966-12-20 1970-09-23 Erik Edvard Andersson Pressure operated actuator
DE3202233A1 (de) * 1982-01-25 1983-08-04 Lindemann Maschinenfabrik GmbH, 4000 Düsseldorf Vorrichtung zum umschnueren von ballen
DE3440278A1 (de) * 1984-11-03 1986-05-15 Festo KG, 7300 Esslingen Aus ringelementen aufgebauter arbeitszylinder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE671148C (de) * 1936-01-11 1940-04-29 Adolf Brendlin Balgmembrankolben
US2456869A (en) * 1944-04-12 1948-12-21 Clarence E Fowler Hydraulic pulsator system
FR1155697A (fr) * 1955-08-25 1958-05-07 Dispositif pour la transmission d'efforts
DE2061596A1 (de) * 1970-12-15 1972-06-29 Daimler Benz Ag Vorrichtung zum Verschieben eines in einem Zylinder geführten Kolbengliedes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009048780A1 (de) * 2009-10-08 2011-04-28 Festo Ag & Co. Kg Faltenbalganordnung
DE102009048780B4 (de) * 2009-10-08 2013-11-28 Festo Ag & Co. Kg Faltenbalganordnung

Also Published As

Publication number Publication date
GB9016589D0 (en) 1990-09-12
GB9115299D0 (en) 1991-08-28
GB2246397A (en) 1992-01-29
GB2246397B (en) 1994-04-06

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Effective date: 19920730