US3704859A - Inflatable cushions of utility as jacks - Google Patents

Inflatable cushions of utility as jacks Download PDF

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Publication number
US3704859A
US3704859A US121773A US3704859DA US3704859A US 3704859 A US3704859 A US 3704859A US 121773 A US121773 A US 121773A US 3704859D A US3704859D A US 3704859DA US 3704859 A US3704859 A US 3704859A
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US
United States
Prior art keywords
portions
cushion
wall portion
piece
jack
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.)
Expired - Lifetime
Application number
US121773A
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English (en)
Inventor
Daniel Josien
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.)
PRONAL SA
Original Assignee
PRONAL SA
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 PRONAL SA filed Critical PRONAL SA
Application granted granted Critical
Publication of US3704859A publication Critical patent/US3704859A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D22/00—Producing hollow articles
    • B29D22/02—Inflatable articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/35—Inflatable flexible elements, e.g. bellows
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material

Definitions

  • Such cushions when circular in shape, are manufactured at the present time either by moulding rubber with interposition of fabric or canvas, or by meansof pieces of fabric coated with elastomer which are cut out in the form of a disc, these pieces being superimposed on each other and their peripheries welded together.
  • the invention provides a method comprising preparing a piece of fabric coated with elastomer and having a generally polygonal shape wherein a regular polygon defines a bottom wall divided into triangular sector portions each of which is extended by aperipheral portion which is approximately in the shape of a polygon having an apex which is symmetrical to the centerof the bottom polygon with respect to the corresponding side of the bottom polygon, forming a folding line along each side of the bottom polygon so as to permit an inward folding over of the corresponding peripheral polygonal portion, forming in the peripheral polygonal portions fold lines which are such that when folding inwardly they define in each peripheral polygonal portion a cover triangular portion superimposed on a corresponding triangular sector portion, and in two adjacent peripheral polygonal portions, two residual triangular portions which are superimposed and constitute a gore which is foldable in the flat state onto or under one of the adjacent cover triangular portions, and, after folding over, adhering all of the gores to the cover tri
  • cushion has a working capacity superior to that of cushions manufactured by the edge-to-edge welding of superimposed discs.
  • adhesion is generally meant any method of connecting rubber to itself, whether it concerns cold adhesion or hot vulcanization.
  • FIG. 1 is a plan view of a piece of cut-out fabric adapted to constitute the main element of the inflatable cushion
  • FIG. 4 is a perspective view showing the inward folding over of the peripheral part of the piece shown in FIG. 1 which forms gores, and
  • FIG. 5 is a diagrammatic sectional view of the inflated cushion.
  • the piece of fabric 1 coated witlhelastomer shown in FIG. 1 has the shape of a rosette consisting of a regular dodecagonal bottom portion A which defines between the center X and the respective sides I triangular sector portions a and twelve peripheral polygonal portions B which are in the extension of the triangular sector portions a and have a virtual apex Y which is symmetrical with the center X with respect to the corresponding side I.
  • the polygonal portions B are approximately pentagonal portions, but as the apices Y are truncated at m along lines parallel to the sides 1, they are in fact hexagonal portions having the line X-Y as axis of symmetry.
  • the sides 1 constitute folding over lines by means of which it is possible to superimpose on the triangular sector portions a triangular portions 12 formed in the polygonal portions B by fold lines n o intersecting the apex Y and ends or corners formed by the sides I.
  • a disc 2 having a regular dodecagonal shape and the same size as the dodecagonal portion A is also cut from a sheet of coated fabric and superimposed on the dodecagonal portion A. Then the cover triangular portions b are made to adhere to the inner disc 2.
  • the pairs of triangular portions d of each gore are adhered to each other and all the gores are maintained in contact with the triangular portions b by means of a reinforcing circular or polygonal disc 3 composed of fabric (FIG. 3) which is adhered to the top of the gores and on the adjacent free surface of the triangular portions b.
  • a reinforcing fabric disc 6 can also be provided'on the underside of the dodecagonal portion A (FIG.
  • the truncations m of the polygonal portions B define, after folding over, a center opening 4 for accommodating an inflating valve 7 which can be so arranged as. to retaina plate 8 employed as a bearing surface for the load to be raised, the bottom wall ofthe cushion bearing against a plate 9.
  • the fabric of the basic piece 1 extends in a continuous manner throughout the section of the raising cushion, irrespective of the angle at which this section is taken so that there is no zone of reduced strength.
  • the method according to the invention avoids the expense of a mould. This is of particular interest in the case of the manufacture of relatively small batches.
  • the invention is also applicable to a base polygon having any number of sides, the dodecagonal shape having been given merely by way of example.
  • the gores 5 may be folded flat not on the outer face or back of the folded over cover triangular portions b, as shown, but on their inner face.
  • An inflatable lifting jack in the form of means defining an airtight cushion, the cushion comprising a wall which is made from a piece of fabric coated with elastomer and is in one piece, said piece having in the non-inflated condition of the cushion a plane bottom wall portion in the shape of a polygon and an upper wall portion in superposed relation to the bottom wall portion and comprising overlapping assemblies. of gores and polygonal portions of the piece of fabric, each of which overlapping assemblies is located in the region of a polygonal sector portion of said bottom wall portion, and means for supplying air to the interior of the cushion 2.
  • An inflatable lifting jack in the form of means defining an inflatable airtight cushion, the cushion comprising a wall which is made from a piece of fabric coated with elastomer and is in one piece, said piece having in the noninflatedcondition of the cushion a plane bottom wall portion in the shape of a polygon and an upper wall portion which is in superposed relation to the bottom wall portion and comprises first portions co-extensive with corresponding portions of the bottom wall portion and pleat portions in alternating relation to the first portions in the upper wall portion, the pleat portions being in a condition folded flat against the first portions, means for maintaining the pleat portions folded against the first portions upon inflation of the cushion, and means for inflating the cushion.
  • a jack as claimed in claim 4 further comprising a retaining and reinforcing disc secured to the upper face of the upper wall portion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Air Bags (AREA)
  • Details Of Garments (AREA)
  • Woven Fabrics (AREA)
  • Fluid-Damping Devices (AREA)
US121773A 1970-03-19 1971-03-08 Inflatable cushions of utility as jacks Expired - Lifetime US3704859A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7009828A FR2091876B1 (fr) 1970-03-19 1970-03-19

Publications (1)

Publication Number Publication Date
US3704859A true US3704859A (en) 1972-12-05

Family

ID=9052520

Family Applications (1)

Application Number Title Priority Date Filing Date
US121773A Expired - Lifetime US3704859A (en) 1970-03-19 1971-03-08 Inflatable cushions of utility as jacks

Country Status (10)

Country Link
US (1) US3704859A (fr)
AT (1) AT320917B (fr)
CA (1) CA948619A (fr)
CH (1) CH536257A (fr)
DE (1) DE2110170C3 (fr)
ES (1) ES389233A1 (fr)
FR (1) FR2091876B1 (fr)
GB (1) GB1350979A (fr)
NL (1) NL7103669A (fr)
SU (1) SU502601A3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060192054A1 (en) * 2004-10-13 2006-08-31 Lachenmeier Timothy T Inflatable and deployable systems with three dimensionally reinforced membranes
CN102166072A (zh) * 2010-02-25 2011-08-31 叶根林 整体多用途折合凳
US20110225735A1 (en) * 2010-03-17 2011-09-22 Hip Innovations, Llc Reconfigurable Pillow

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4441571A (en) * 1981-02-02 1984-04-10 Wood Kenneth G Fluid bearing
FR2499462A1 (fr) * 1981-02-06 1982-08-13 Marchal Et Cie Ets Coussin gonflable, notamment, pour la reparation des pneus et son procede de fabrication
US4438795A (en) * 1982-04-22 1984-03-27 Kimwood Corporation Flexible platen planer
RU2453492C1 (ru) * 2010-12-15 2012-06-20 Общество с ограниченной ответственностью Научно-производственное предприятие "АРМОКОМ-ЦЕНТР" Способ изготовления домкрата-подушки и домкрат-подушка

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2985419A (en) * 1957-04-13 1961-05-23 Mining Engineering Co Ltd Roof supports for mine workings
US2990166A (en) * 1957-08-29 1961-06-27 Myles A Walsh Mining method
US3015470A (en) * 1958-07-25 1962-01-02 Roy R Patchen Construction jack

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2985419A (en) * 1957-04-13 1961-05-23 Mining Engineering Co Ltd Roof supports for mine workings
US2990166A (en) * 1957-08-29 1961-06-27 Myles A Walsh Mining method
US3015470A (en) * 1958-07-25 1962-01-02 Roy R Patchen Construction jack

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060192054A1 (en) * 2004-10-13 2006-08-31 Lachenmeier Timothy T Inflatable and deployable systems with three dimensionally reinforced membranes
CN102166072A (zh) * 2010-02-25 2011-08-31 叶根林 整体多用途折合凳
CN102166072B (zh) * 2010-02-25 2013-06-19 叶根林 整体多用途折合凳
US20110225735A1 (en) * 2010-03-17 2011-09-22 Hip Innovations, Llc Reconfigurable Pillow
US8225441B2 (en) * 2010-03-17 2012-07-24 Hip Innovations, Llc Reconfigurable pillow

Also Published As

Publication number Publication date
DE2110170A1 (de) 1971-10-07
CH536257A (fr) 1973-04-30
GB1350979A (en) 1974-04-24
DE2110170C3 (de) 1974-05-30
DE2110170B2 (fr) 1973-10-31
FR2091876A1 (fr) 1971-01-21
CA948619A (en) 1974-06-04
ES389233A1 (es) 1974-05-01
NL7103669A (fr) 1971-09-21
AT320917B (de) 1975-03-10
SU502601A3 (ru) 1976-02-05
FR2091876B1 (fr) 1974-03-15

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