EP0040578A1 - Pneumatisches Hebekissen - Google Patents

Pneumatisches Hebekissen Download PDF

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Publication number
EP0040578A1
EP0040578A1 EP19810630031 EP81630031A EP0040578A1 EP 0040578 A1 EP0040578 A1 EP 0040578A1 EP 19810630031 EP19810630031 EP 19810630031 EP 81630031 A EP81630031 A EP 81630031A EP 0040578 A1 EP0040578 A1 EP 0040578A1
Authority
EP
European Patent Office
Prior art keywords
pad
cords
set forth
cover
pneumatic
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.)
Granted
Application number
EP19810630031
Other languages
English (en)
French (fr)
Other versions
EP0040578B1 (de
Inventor
Ernest Knaus
Paul Elliott Liggett
Raymond Joseph Namsick
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.)
Goodyear Aerospace Corp
Original Assignee
Goodyear Aerospace Corp
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 Goodyear Aerospace Corp filed Critical Goodyear Aerospace Corp
Publication of EP0040578A1 publication Critical patent/EP0040578A1/de
Application granted granted Critical
Publication of EP0040578B1 publication Critical patent/EP0040578B1/de
Expired 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
    • 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

Definitions

  • This invention generally relates to fluid pressure devices and more particularly to a flexible, elastomeric, cord-fabric reinforced, inflatable container that functions as an extremely powerful and efficient pneumatic lift pad or jack.
  • the invention discloses a press molded pad structure which results in a very low profiled pre-inflation device that may be positioned in confined spaces and inflated to perform a powerful lifting function.
  • Pneumatic lift pads of the type alluded to are known and used in the art, there being various types and configurations available which attempt to meet the needs and requirements demanded of this type device. Exemplary of these are lift pads described and illustrated in U. S. Patents to Tezuka (#3,982,731); Orndorff, Jr. (#4,036,472); and Vetter (#4,067,544 and #4,143,854).
  • This invention provides an improvement in the state of the pneumatic lift pad art by the provision of a press-molded device that: exhibits a very low profile when in its non-inflated condition, provides a high burst strength and increased structural integrity for a greater safety factor when applied to vigorous lifting applications, is extremely abrasion, puncture, and cut resistant, and has a patterned exterior surface for aggressive non-slip stability.
  • the pneumatic pad of the present invention is characterized by a molded-in positioning locator in the cover ply that is of a contrasting color for ease in positioning of the pad in confined spaces.
  • a pneumatic pad in accordance with this invention is generally indicated by reference numeral 10, which pad 10 is a multi-ply integrally laminated construction in a substantially square or rectangular configuration. While it will be recognized that other geometric shapes may be applied to the pad 10 and these are considered within the scope of the invention a square or rectangular shape is more conducive to the manufacturing process and therefore this description will be specifically directed to pneumatic pads of a square or rectangular configuration.
  • the pad structure comprises an inner fluid (liquid or - air) impervious liner or envelope 12, first and second cord fabric plys 20 and 30, an outer envelope 14, and a valve 16 (shown in Figs. 1 and 6) for pressurizing the pad 10.
  • the elements of liner 12, cord fabric plys 20 and 30 and outer envelope 14 are all common to two integrally laminated covers 11 and 13 as-illustrated in Fig. 4.
  • the inner liner 12 is comprised of elastomeric ply sheets 12a and 12b, the sheet 12b being of a smaller dimension than the sheet 12a and thus providing a lap joint when the peripheral edges of the sheet 12a are folded over the sheet 12b. Because the pneumatic pad of this invention is a press-molded product, two sheets of a release paper 18 are inserted between the liner sheets 12a and 12b to maintain separation of the two upon vulcanization. Thus, upon being vulcanized, an enclosed envelope 12 is formed by the sheets 12a and 12b. Strips of gum elastomer 12c may also be provided and laid in along the periphery of the release paper 18 to maintain a uniform thickness of the liner 12 when a valve 16 is positioned in one of the corners as illustrated in Figs. 1 and 6.
  • the cord fabric plys 20 and 30 are made similarily to a tire cord fabric and these may be of monofilaments or multifilament yarns of wire, synthetic or natural textiles, or glass embedded in a suitable elastomer to maintain a parallel orientation between adjacent cords.
  • Steel wire, nylon, polyester, or aramid are the preferred cord materials because of the rigorous type application
  • the cord fabrics 20 and 30 are made in flat sheets to a specific length and width for a particular pad size and these sheets are folded in a press brake such as to impart a specific radius R to the cords prior to fabrication of the pad structure.
  • the fabric may be folded such that a bend radius R of 4-20 mm is effected to the cords and the ends are overlapped to at least 75% of the length of fabric between the folds.
  • a release liner is inserted to prevent sticking together of the overlapping fabric so that it may be stored for later use. The bend radius R will thus eliminate kinking of the cords throughout assembly, and cure operations.
  • the cord fabric 20 comprises individual cords 22 folded such that it surrounds the innerliner 12, the ends of the cords 22 starting and ending a short distance in from the edge of the innerliner.
  • the cord fabric 20 is single ply in one cover of the pad but it is double ply in the opposite cover.
  • the cord fabric 30 is folded such that individual cords 32 exhibit a radius R in the area of the fold and this fabric is applied about the cord fabric 20 such that the cords 32 are orthogonal to the cords 22.
  • the cord fabric 30 however is applied oppositely to the cord fabric 20, that is, it is applied such that the lapped ends are positioned in the opposite cover than the lapped ends of the cord fabric 20.
  • the cord fabric 30 provides a single ply in one cover where the cord fabric 20 is double ply and provides a double ply in the opposite cover where the cord fabric 20 is single ply.
  • the orientation of the cord fabrics 20 and 30 combine to provide at least three plys of cord fabric in each of the covers 11 and 13 of the pneumatic pad 10. More simply stated there are two substantially complete plys of cord fabric 20 and one ply of cord fabric 30 in one cover of the pad while there are two substantially complete plys of cord fabric 30 and one ply of cord fabric 20 in the opposite cover of the pad and the cords 22 are oriented orthogonally to the cords 32.
  • cord fabric inserts 24 are positioned lengthwise along the lateral edges between the innerliner envelope 12 and the cord fabric plys 20 and 30.
  • the cord fabric inserts 24 provide orthogonal and lateral reinforcement cords in the edges of the pad.
  • the outer envelope 14 comprises a cover ply sheet 14a and a cover ply sheet 14b which are lap joined about their peripheral edges.
  • the outer envelope 14 is comprised of an elastomer such as neoprene that provides excellent weather and abrasion resistance and in addition is resistant to a wide range of chemicals.
  • the envelope is further characterized by a texture illustrated in Fig. 1 that provides a very high friction surface. While there are many texture configurations that may be applied, applicants have found that a small basketweave pattern 26 provides an excellent slip resistant friction surface to the pneumatic pad. This is of course important for the maintenance of the pad in its intended orientation in heavy lifting applications.
  • the texture may be imparted to the pad exterior covers by means of a suitable textured mold liner. Further, and to provide an aid in positioning of the pad, there is provided a high visibility locator .embedded in each cover of the pad.
  • Fig. 1 illustrates the use of an X-pattern locator 28 but others such as concentric circles or a bullseye pattern may also be applied.
  • the locator pattern is preferably comprised of an elastomer in a high contrast color such as for example yellow or the like that is integrally vulcanized into the cover elastomer of the pad. It will be appreciated from the foregoing that the locator 28 is advantageous in placing of the pad in confined spaces.
  • FIGS 6 and 7 illustrates the valve mounting within the pad structure and as shown the valve assembly 16 is a solid metal fitting of brass or the like having a tapered butt end 16a that is embedded in the corner elastomer of the pad structure.
  • the valve comprises a substantially triangular shaped butt end 16a having a nipple end 16b that protrudes from the corner of the pad. Integral with the nipple is a hex 16c having internal threads that facilitate connection to a supply of high pressure air for inflation of the pad.
  • valve unit 16 is firmly seated with the base end 16a tapering to its larger extent toward the center of the pad and in this configuration may not be easily pulled out of the pad elastomer by reason of the crossed cords 22,32 as illustrated diagramatically in Fig. 7.
  • wedge strips 40 may be positioned along either side of the butt end 16a. As indicated by the ghost line showing of the corner portion of the innerliner sheet 12b the valve 16 is positioned between the innerliner sheets 12a and 12b prior to vulcanization.

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)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Diaphragms And Bellows (AREA)
EP19810630031 1980-05-19 1981-04-24 Pneumatisches Hebekissen Expired EP0040578B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15104980A 1980-05-19 1980-05-19
US151049 1980-05-19

Publications (2)

Publication Number Publication Date
EP0040578A1 true EP0040578A1 (de) 1981-11-25
EP0040578B1 EP0040578B1 (de) 1985-02-06

Family

ID=22537120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810630031 Expired EP0040578B1 (de) 1980-05-19 1981-04-24 Pneumatisches Hebekissen

Country Status (5)

Country Link
EP (1) EP0040578B1 (de)
JP (1) JPS579698A (de)
AU (1) AU540387B2 (de)
CA (1) CA1153358A (de)
DE (1) DE3168736D1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157947A1 (de) * 1984-02-28 1985-10-16 Manfred Vetter Hebekissen aus heissvulkanisiertem Gummimaterial und in Rechteckform
GB2192232A (en) * 1986-07-01 1988-01-06 Holywell Eng Ltd Improvements relating to hydraulically or pneumatically operated lifting bags
GB2240083A (en) * 1989-11-16 1991-07-24 Daton Lovett Andrew James Actuator
WO1994026649A1 (en) * 1993-05-12 1994-11-24 David Bernard Jones A lifting cushion
DE4412422A1 (de) * 1994-04-11 1995-10-12 Werner M Ing Grad Homann Muskelartiges Kraftelement
DE102010062409A1 (de) 2009-12-09 2011-06-16 Vetter Gmbh Hebekissen aus in einer Presse heißvulkanisiertem, bahnförmigen Gummimaterial und Verfahren zu seiner Herstellung
RU2453492C1 (ru) * 2010-12-15 2012-06-20 Общество с ограниченной ответственностью Научно-производственное предприятие "АРМОКОМ-ЦЕНТР" Способ изготовления домкрата-подушки и домкрат-подушка
EP2876352A1 (de) * 2013-10-22 2015-05-27 MAN Truck & Bus Österreich AG Nutzfahrzeug mit Druckgasbehälter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2651494C1 (ru) * 2017-01-13 2018-04-19 Михаил Иосифович Трибельский Ролик-мешок

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6602558A (de) * 1966-02-28 1967-08-29
GB1169023A (en) * 1965-09-27 1969-10-29 Michelin & Cie Improvements in Inflatable Load Supporting Bags
AU453143B2 (en) * 1972-04-07 1974-09-06 The Goodyear Tire & Rubber Company Dunnage device
FR2305381A1 (fr) * 1975-03-26 1976-10-22 Kleber Colombes Coussin gonflable de calage ou de levage
US4067544A (en) * 1975-12-01 1978-01-10 Manfred Vetter Pneumatic flat pads
US4143854A (en) * 1975-05-06 1979-03-13 Manfred Vetter Jacking device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1169023A (en) * 1965-09-27 1969-10-29 Michelin & Cie Improvements in Inflatable Load Supporting Bags
NL6602558A (de) * 1966-02-28 1967-08-29
AU453143B2 (en) * 1972-04-07 1974-09-06 The Goodyear Tire & Rubber Company Dunnage device
FR2305381A1 (fr) * 1975-03-26 1976-10-22 Kleber Colombes Coussin gonflable de calage ou de levage
US4143854A (en) * 1975-05-06 1979-03-13 Manfred Vetter Jacking device
US4067544A (en) * 1975-12-01 1978-01-10 Manfred Vetter Pneumatic flat pads

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157947A1 (de) * 1984-02-28 1985-10-16 Manfred Vetter Hebekissen aus heissvulkanisiertem Gummimaterial und in Rechteckform
GB2192232A (en) * 1986-07-01 1988-01-06 Holywell Eng Ltd Improvements relating to hydraulically or pneumatically operated lifting bags
GB2240083A (en) * 1989-11-16 1991-07-24 Daton Lovett Andrew James Actuator
GB2240083B (en) * 1989-11-16 1994-08-03 Daton Lovett Andrew James Actuator
WO1994026649A1 (en) * 1993-05-12 1994-11-24 David Bernard Jones A lifting cushion
DE4412422A1 (de) * 1994-04-11 1995-10-12 Werner M Ing Grad Homann Muskelartiges Kraftelement
DE102010062409A1 (de) 2009-12-09 2011-06-16 Vetter Gmbh Hebekissen aus in einer Presse heißvulkanisiertem, bahnförmigen Gummimaterial und Verfahren zu seiner Herstellung
US8628060B2 (en) 2009-12-09 2014-01-14 Vetter Gmbh Lifting bag of web-like rubber material hot-vulcanized in a press and method for its production
RU2453492C1 (ru) * 2010-12-15 2012-06-20 Общество с ограниченной ответственностью Научно-производственное предприятие "АРМОКОМ-ЦЕНТР" Способ изготовления домкрата-подушки и домкрат-подушка
EP2876352A1 (de) * 2013-10-22 2015-05-27 MAN Truck & Bus Österreich AG Nutzfahrzeug mit Druckgasbehälter

Also Published As

Publication number Publication date
DE3168736D1 (en) 1985-03-21
CA1153358A (en) 1983-09-06
JPS579698A (en) 1982-01-19
AU7051081A (en) 1981-11-26
EP0040578B1 (de) 1985-02-06
AU540387B2 (en) 1984-11-15

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