EP0115199A1 - Cric hydraulique et son procédé de fabrication - Google Patents

Cric hydraulique et son procédé de fabrication Download PDF

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Publication number
EP0115199A1
EP0115199A1 EP83307950A EP83307950A EP0115199A1 EP 0115199 A1 EP0115199 A1 EP 0115199A1 EP 83307950 A EP83307950 A EP 83307950A EP 83307950 A EP83307950 A EP 83307950A EP 0115199 A1 EP0115199 A1 EP 0115199A1
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EP
European Patent Office
Prior art keywords
hydraulic jack
hydraulic
jack
closure means
closure
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Withdrawn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
EP83307950A
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German (de)
English (en)
Inventor
William O. Holmes
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0115199A1 publication Critical patent/EP0115199A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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 a hydraulic jack for moving weighty objects and more particularly to a hydraulic jack having a tubular body expandable from a flattened condition to an expanded condition in response to fillin ⁇ thereof with hydraulic fluid, preferably water.
  • Applicant has over thirty years of experience, working as an ironworker, relating to all phases of high and heavy rigging.
  • applicant has encountered many unusual emergency situations, such as fire, floods, explosions, falling material, equipment failure, and earthquakes, wherein the need for a highly portable and efficient lifting jack was needed.
  • many such emergencies resulted in the entrapment of persons under heavy objects which required expeditious and precise removal to save such persons.
  • applicant's work experience he encountered many problems relating to the lifting or moving of heavy objects, such as heavy machinery, buildings, bridges, airplanes, and etc.
  • An object of this invention is to provide a noncomplex and economical hydraulic jack which will exhibit a high degree of structural integrity, lifting capacity, and versatility and a method for making the jack.
  • the hydraulic jack can be stored and transported in coiled form and uncoiled at a job site for insertion into very small clearances (less than one inch) under an object to be moved.
  • the inflation of the jack normally by water under a line pressure of less than 250 psi, can be closely controlled to lift, lower, or otherwise move the object in small increments, such as thousandths of an inch.
  • the jack can be powered by the engme-driven pump ol a fire truck or the like, a hand pump, or a common garden hose.
  • the hydraulic jack comprises an elongated and seamless tubular body composed of an impervious, flexible material expandable from a flattened condition to an expanded condition in response to filling of the body with hydraulic fluid.
  • a first closure means seals the first end of the body into flattened form, coextensive with and generally conforming to the composite thickness of the body when the body is in its flattened condition.
  • a second closure means seals the second end of the body and at least one hydraulic fitting means is secured on the second closure means for attachment to a source of pressurized hydraulic fluid to selectively communicate the fluid interiorly of the body to expand it from its flattened condition to its expanded condition.
  • the first closure means comprises a pair of clamping plates having the first end of the body clamped therebetween, an elongated elastomeric sealing member positioned between each clamping plate and the body the having a lip extending over an inboard edge of the clamping plate, and fastening means for drawing the clamping plates together to precompress the sealing members under a predetermined pressure.
  • a method for making the first closure means includes the steps of forming a plurality of arcuately disposed holes through the body, anchoring and stretching the body to align the holes linearly, and clamping the open end of the body to form a sealed first closure means.
  • FIG 1 illustrates a plurality of hydraulic jacks 10 inserted beneath the lowered side of the Leaning Tower of Pisa in Italy, to move it towards an upright position to substantially prolong its useful life.
  • each hydraulic jack is capable of lifting at least twenty-five (25) tons, whereby a plurality of such jacks operated simultaneously (see Figure 10) will provide infinite lifting and/or lowering capabilities.
  • the high side of the base of the Tower can be readily lowered approximately four and one-half (41 ⁇ 2) inches and stabilized to restore the Tower to its 15th Century position.
  • the jack has many other applications wherein a closely controlled lifting, lowering, or other type of moving force is required in confined quarters.
  • the jack could be utilized to lift heavy machinery, land vehicles, or airplanes for repair or positioning purposes, free a driver subsequent to a vehicle crash wherein the steering wheel column or door has pinned him therein, and many other applications which should become obvious to those skilled in the arts relating hereto.
  • hydraulic jack 10 is adapted to be rolled-up into coiled form for storage and/or transport purposes.
  • the hydraulic iack When the hydraulic iack is uncoiled. as shown in Figure 4, it exhibits a verv narrow profile to adapt it for insertion into a small clearance (e.g., less tnan one incn), under an object to be moved.
  • the hydraulic jack is adapted to be expanded to its phantom-lined cylindrical condition from its flattened condition, as illustrated in Figure 4, in response to filling thereof with pressurized hydraulic fluid, preferably water which is readily available.
  • pressurized water could be supplied to the jack by an engine-drive pump of a fire truck or the like, a hand pump, or a common garden hose.
  • the hydraulic jack is normally used in conjunction with shims, pressure plates, or other types of bearing members and will generally conform to the shape thereof to provide the desired effective surface area for lifting purposes, as illustrated in Figures 10 and 11.
  • hydraulic jack 10 comprises an elongated, woven, and seamless tubular body 11 having a composite wall thickness approximating 0.15 in. and composed of an impervious, flexible material.
  • the body material is woven into a tube lla ( Figure 6) and coated and at least partially impregnated with a bonding and sealing agent, such as a cured plastic resin or an elastomer (e.g., nitrile rubber), to be expandable from its flattened condition to its expanded, cylindrical condition, when in free-form.
  • a bonding and sealing agent such as a cured plastic resin or an elastomer (e.g., nitrile rubber), to be expandable from its flattened condition to its expanded, cylindrical condition, when in free-form.
  • the woven fabric material (e.g., a standard cross-weave with the warp ends oriented at right angles to the filling strands) composing tube lla may comprise a standard woven firehose material, such as 1.5 inch cotton which is rubber-lined internally and externally or unlined linen. Since the material must exhibit a very high burst pressure rating and impact strength, it is preferably composed of one of the relatively new family of polyester (Dacron) or aromatic polyamide fibers, which are now commercially available, impregnated or coated internally and externally with a cured plastic resin bonded thereto by a conventional molding process.
  • a standard woven firehose material such as 1.5 inch cotton which is rubber-lined internally and externally or unlined linen. Since the material must exhibit a very high burst pressure rating and impact strength, it is preferably composed of one of the relatively new family of polyester (Dacron) or aromatic polyamide fibers, which are now commercially available, impregnated or coated internally and externally with a cured plastic resin
  • Kevlar 29 Another suitable material is Kevlar 29 which has the same high tensile strength and a modulus in the range of 9,000,000 psi. Since the Kevlar material is organic in nature, it can be combined with most commercially available resins to provide a composite structure exhibiting the desired tensile strength, modulus of elasticity, toughness for yielding good textile processability, high impact strength, good thermal stability, and chemical resistance.
  • An example of a six-inch diameter tubular woven fabric composed of Kevlar is a 1500 denier, 2 ply warp and filling yarn having a 2 x 2 basket weave.
  • Kevlar for forming body 11 will desirably exhibit substantially less body stretch than polyester-based bodies and will substantially increase the burst strength of the jack.
  • the reduction in stretch and increase in burst strength will provide very precise and controlled inflation of the jack at working pressures up to 1,500 psi, for example, without sacrificing workman safety.
  • thermosetting resins may be phenolics, polyesters, epoxies, polyurethanes, or any suitable mixture thereof.
  • the thermoplastic resins may comprise polyethylene, nylon, polypropylene, rubber, or any suitable mixture thereof.
  • the polyesters are normally utilized since they are readily available, relatively inexpensive, and are suitable for many composite structure applications.
  • the cured plastic resin preferably forms an outer elastomeric coating llb and an inner elastomeric liner lie.
  • the chosen resin should exhibit most of the above-enumerated desirable properties, also including a high burst and crimp strengths, flexibility, and elastic memory to enable the jack to expand and contract readily without plastic deformation.
  • a first closure means 12 functions to seal a first end of body 11 into flattened form, coextensive with the body, as shown.
  • Closure means 12 may comprise a pair of superimposed steel clamping plates 13 for clamping the tubular, open first end of body 11 therebetween. Plates 13 may be drawn and clamped together by fastening means 14, such as screws, bolts, or other suitable fasteners.
  • Exposed rounded elastomeric edges 15 are preferably formed bn the inboard edge or each plate 13, abutting body 11, to prevent any abrasion of the woven material composing the body, as shown in Figure 5, and to substantially increase the jack's burst strength and sealing capabilities thereat.
  • a thin elastomeric rubber or plastic seal 16 formed as an elastomeric coating or separate elongated member (e.g., nitrile rubber or the rubber-like urethane Flexane 94, manufactured by Devcon Corp.), may be bonded or separately mounted on the inboard end of each plate.
  • the seal is positioned between each plate and body 11 and has a lip extending over the inboard edge of the plate. When the plates are clamped together, the seals will be precompressed under a predetermined pressure.
  • a pair of aligned holes 17 may be formed through the plates to adapt the jack for attachment to a rod or cable to facilitate proper positioning of the jack in confined spaces.
  • an annular bushing 18 may be clamped or otherwise suitably secured between the plates, in alignment with the holes. The bushing facilitates insertion of a cable or positioning tool through the holes and also provides a stop means between the plates, aiding them in precisely applying the desired clamping pressure to this end of body 11.
  • Figure 7 illustrates the addition of a woven sock 19 to the composite makeup of first closure means 12 to increase the structural integrity and sealing capabilities thereof.
  • the sock may be composed of the same material composing body 11, such as polyester (Dacron) or Kevlar threads, and preferably forms a twill-weave fabric encapsulating the first end of the body, i.e., with the warp ends disposed approximately 45° relative to the filling strands. This disposition aids in increasing the burst strength at this end of the jack since both the warp and filling strands will be placed in tension.
  • Sock 19 may be suitably impregnated with the same resin or elastomer impregnating body 11 to form a structurally integrated and fluid-tight composite structure of the type shown in Figure 7.
  • the sock is preferably woven into the body to form an integral part thereof, rather than formed as a separate component as suggested by Figure 6.
  • the clamping plates can be eliminatedin many jack applications.
  • Body 11, as well as sock 19, preferably forms a composite structure comprising outer plastic (e.g., nitrile rubber) coating llb which will exhibit a high degree of toughness to avoid potential abrasion and puncture problems and inner plastic (e.g., nitrile rubber) lining 11c which primarily functions to ensure a fluid tight seal.
  • outer plastic e.g., nitrile rubber
  • inner plastic e.g., nitrile rubber
  • a second open end of body 11 is closed and sealed by second closure means 20.
  • the second closure means preferably comprises a cup-shaped head member 21 having an annular end wall 22 and a cylindrical outer wall 23 extending within the second end of body 11.
  • a ring means comprising a pair of outer rings 24, circumvents and clamps the second end of body 11 onto outer wall 23 of head member 21 to form an annular, static seal thereat.
  • outer wall 23 of the head member has an annular ridge 25 formed circumferentially therearound to define a pair of axially spaced camming surfaces 26.
  • Rings 24 have like-shaped annular camming surfaces 27 formed internally thereon to clamp body 11 against cam surfaces 26.
  • a compression coupling is thus formed by second closure means 20 to effect a highly efficient static seal at this end of hydraulic jack 10, the burst strength of which is compatible with that of body 11 and closure means 12.
  • FIG 8 further illustrates a pair of standard quick-disconnect couplings 30 for selectively connecting a pair of hoses or lines 31, such as a standard garden hose, to hydraulic jack 10.
  • Each coupling includes a threaded fitting 32 secured on end wall 22 of head member 21 and a fitting 33 secured on the end of a respective hose 31.
  • Coupling 30 is of standard design and may include a standard spring-biased or pressure responsive check valve in each fitting 32 and 33 thereof, which automatically closes upon disconnection of the fittings from each other.
  • Standard quick-disconnect fluid couplings of this type are readily available from such well-known companies as Parker-Hannifin Corp. (Hoze-Lok type 40), Snaptite Corp., etc.
  • a standard bleed valve 34 is preferably threadably secured on end wall 22 to selectively vent air from the working chamber of the hydraulic jack when the chamber is filled with hydraulic fluid.
  • hydraulic hose 10 may be stored and transported to a work site in its coiled condition illustrated in Figure 2 and quickly uncoiled and inserted, under an object to be lifted, lowered, or otherwise moved, in its flattened condition, illustrated in Figure 4.
  • the overall thickness of the hydraulic jack excepting the second end thereof which is closed and sealed by second closure means 20, exhibits an overall thickness of less than one inch.
  • the operative portion of the hydraulic jack may be inserted into very small clearances in contrast to conventional hydraulic jacks which have enlarged fittings on each end which function on the vertically actuated piston-principle or are of the inflatable type exhibiting a substantial thickness, and thus require a substantially greater vertical height or clearance for work purposes.
  • holes 16 facilitate attachment of a cable, rigid rod, or the like thereto for the purpose of pulling or pushing the hydraulic jack into its proper position under the work object.
  • one of the hoses 31 may be connected to the hydraulic jack by coupling 30 and further connected to a pressurized hydraulic fluid source, such as a standard water tap which dispenses water at an approximate water pressure of from 45 psi to 100 psi, although an operating pressure exceeding 250 psi is preferred for many applications.
  • the pressurized fluid source may comprise an engine-driven or hand-operated pump for dispensing pressurized fluid from a mobile tank, such as the type employed on fire trucks and the like, or from a bucket or other convenient water source, such as a river.
  • a standard pressure gauge may be attached to hose 31 to permit visual observation of the hydraulic fluid pressure therein.
  • a flow control valve can be connected to pressurized hose 31 to closely control the volume of hydraulic fluid communicated within the hydraulic jack and, thus, the rate of expansion thereof.
  • the valve, or a second valve could be connected to the second line, constituting a drain line, to precisely control the volume of hydraulic fluid 'in the jack.
  • the rate of vertical lift or contraction may be closely controlled in sequential stages, such as stages in the thousandths of an inch. Such close control would be advantageous in many applications, such as the alignment of a drive shaft on a large seagoing vessel.
  • a hydraulic fluid such as water
  • bleed valve 34 would normally be opened to exhaust any air that may be entrapped therein in generally the same manner as one would bleed the brake lines of an automobile.
  • hydraulic jack 10 Although the material composing body 11 of hydraulic jack 10 is sufficiently tough to engage any irregular surface without causing a potential puncture therein, it may prove desirable in many applications to utilize jack aids, such as pressure plates positioned under and/or over body 11 to facilitate sequential lifting of an object in stages. For example, after an object has been lifted five (5) inches, a support block having a vertical height of four inches could be inserted under the object, and a second deflated hydraulic jack 10 ( Figure 4) could be inserted between the object and the block. Upon partial filling of the second hydraulic jack with hydraulic fluid to support the object, the first hydraulic jack could be deflated and removed, whereafter the second hydraulic jack could be expanded to further lift the object. This procedure could be continued with one or more jacks working simultaneously to lift the object to any desired height.
  • jack aids such as pressure plates positioned under and/or over body 11
  • a plurality of hydraulic jacks 10 can be operated simultaneously with equalized hydraulic fluid pressure being communicated therein via interconnecting hoses 31'.
  • the second fitting 32 secured on each end of each hydraulic jack thus facilitates such interconnection.
  • the two fittings will also obviously provide flexibility in the communication of hydraulic fluid to the jacks, and venting thereof.
  • both fittings could be utilized to communicate hydraulic fluid to the jack to double its rate of expansion, or only one hose may be connected to the pressurized fluid source, whereas the other hose could be connected to a drain, closely controlled by a flow control valve.
  • the jacking system of this invention is thus adapted for many uses wherein a plurality of the jacks could be connected together in series or in tandem and simultaneously operated by a single variable control valving arrangement.
  • the operation could be computer-controlled to ensure the maximum efficiency and control.
  • any or all of the jacks can be disconnected and controlled separately with quick disconnect couplings 30 ( Figure 9), having the above-described check valves therein.
  • the water contained in the expanded hydraulic jack could be replaced by a hardenable cementious material, such as a standard .Portland cement, either individually or simultaneously, to provide an in-site foundation, i.e., the jacks would not be removed.
  • FIGs 10 and 11 schematically illustrate the lifting capacities of two sizes of hydraulic jacks 10, each mounted on a pressure plate 34 which may be used therewith to define a flat supporting surface therefor.
  • the larger capacity hydraulic jack illustrated in Figure 11 would provide a lifting force of 16;000 pounds or 8 tons when expanded to a vertical height of two (2) inches. Expansion thereof to a vertical height of five (5) inches would provide a lifting force of 4,700 pounds or 2.35 tons.
  • the length and diameter of a particular hydraulic jack can be suitably designed for a wide variety of applications.
  • a sufficient lifting force is provided to lift an axle of a motor vehicle. This could be accomplished by laying the hydraulic jack on level ground with a second pressure plate 34 disposed over body 11 of the jack when it is maintained in its flattened condition illustrated in Figure 4.
  • One tire of the vehicle could then be driven to rest on the upper pressure plate, whereby the jack could be thereafter expanded to lift the tire and axle five (5) inches, for example.
  • FIGS 12-16 illustrate a second hydraulic jack embodiment 10' wherein corresponding components and structures are identified by identical numerals, but with identical numerals depicting modified components and structures of the second hydraulic jack embodiment being accompanied by a prime symbol (').
  • Jack 10' includes a body 11', composed of one of the types of flexible materials described above, adapted to permit the jack to be rolled-up into coiled form, a first closure means 12' for sealing a first end of the body, and a second closure means 20'.
  • the second closure means has been modified to include the pair of outer locking rings 24' mounted on a longitudinally slotted plastic ring 4 and adapted to form a compression coupling with a head member 21'.
  • the head member is shown in the form of an annular plug-like manifold. The compression coupling functions to clamp this end of body 11' thereat to effect a highly efficient static seal.
  • a pair of superimposed steel clamping plates 13' are adapted to clamp the tubular, open-end of body 11' therebetween by means of screws 14 which are threaded into suitably tapped holes formed in the lower plate, as more clearly shown in Figure 16.
  • An elongated elastomeric seal 16' is positioned between each clamping plate and body 11' and has a lip 40 ( Figures 15 and 16) extending over an inboard edge of the clamping plate.
  • the elastomeric (e.g., unreinforced or Nylon reinforced nitrile rubber having a Durometer hardness in the range of 90) seal will tend to extrude slightly (e.g., 0.25 in.) when the plates are clamped together.
  • the inherent flexure and elastic memory of the seal will allow the body to form a near natural structural transition with its connection to the clamping plates.
  • An analogy to the functional desiderata of improved closure means 12' may be one of equating clamping plates 13' to a tree, the roots of the tree to elastomeric seals 16', and the earth in which the roots are anchored to body 11'.
  • seals 16' will provide the transitional media (i.e., "roots") to the clamping plates to provide maximum strength to the integrated components of the closure means.
  • a seal anchoring means 36 is formed on a grooved end 15' ( Figure 13) of each clamping plate 13' to lock seal 16' thereon and to prevent it from completely extruding out from between the clamping plate and the body when' the clamping plates are secured together and when the jack is pressurized.
  • anchoring means preferably comprises an elongated recess 37 formed entirely throughout the length of an underside of the clamping plate and an elongated notch 38 formed intermediate the sides of the recess and also throughout the entire length of the clamping plate.
  • Seal 16' includes a body portion 39 disposed in recess 37 and a lip 40 extending over a chamfered inboard edge of the clamping plate.
  • a rib 41 is formed on the seal and is disposed in notch 38 to prevent longitudinal movement of the seal relative to the clamping plate.
  • the inner side of each body portion 39 is substantially flush with. an underside of a respective clamping plate.
  • FIGs 17-21 illustrate method steps for making end closure means 12 '.
  • a plurality of laterally spaced bolt holes 42 are formed through the double-layered open end of body 11' in an arcuate array A and transversely relative to a longitudinal axis X of body 11'.
  • Two outer bolt holes 42a are also formed through the body, but remain in their same location after the plates have been clamped in place.
  • bolt holes 42 will be aligned in a linear relationship L ( Figure 21) relative to each other, as represented by linear bolt holes 43 formed through the clamping plates in Figure 13 and the disposition of the forward row of seven screws 14 in Figure 15.
  • bolt holes 42 and 42a are formed through body 11 by first placing a punch die 44 over the body (Figure 17) and then driving a punch 46 through each guide hole 45 and 45a of the punch die ( Figure 18), with the seven forwardmost guide holes conforming to the arcuate configuration A of the formed bolt holes 42.
  • a female die 47 may be positioned beneath the body and has a similar array of holes (not shown) formed therein to receive punches 46.
  • Seals 16' are then suitably mounted between the clamping plates and body ( Figure 19) in the manner described above. In particular, each seal is mounted in a grooved end 15' (Figure 13) of each clamping plate, as more clearly shown in Figure 16.
  • the subassembly is then anchored by securing only the two outer screws 14' through accommodating bolt holes 43a ( Figure 13), securing the clamping plates together.
  • a suitable jig and fixture (not shown) may be utilized to align and anchor the subassembly in place.
  • a portion of the body between bolt holes 43a of the clamping plates and aligned bolt holes 42a of the body is compressed, but not to an extent to prevent relative longitudinal sliding movement of the body between the plates.
  • the body is then stretched longitudinally to at least approximately align bolt holes 42 in linear relationship L relative to each other and in alignment with bolt holes 43 of the clamping plates.
  • the stretching step is preferably accomplished by inflating body 11' whereby the body will tend to form semi-spherical end portions tending to pull the body in the direction of arrow X in Figure 17. Inflation pressures in the range of 20 psi have been found satisfactory to effect the stretching and alignment function. Thereafter, clamping plates 13' are clamped over the body under a clamping pressure approximating thirty-five tons whereafter the remaining seven screws 14 are installed and all nine screws are tightened under predetermined torques to retain a predetermined clamping pressure.
  • outer two screws 14 used for anchoring purposes are positioned substantially rearwardly of seals 16' and rearwardly of the seven forwardly disposed and aligned screws 14. This arrangement tends to relieve any adverse clamping pressures that may occur adjacent to the forward corners of the clamping plates, which are points on the jack prone to leakage.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)
  • Forging (AREA)
EP83307950A 1982-12-27 1983-12-23 Cric hydraulique et son procédé de fabrication Withdrawn EP0115199A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45333482A 1982-12-27 1982-12-27
US453334 1982-12-27

Publications (1)

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EP0115199A1 true EP0115199A1 (fr) 1984-08-08

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EP83307950A Withdrawn EP0115199A1 (fr) 1982-12-27 1983-12-23 Cric hydraulique et son procédé de fabrication

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JP (1) JPS59158796A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006802A1 (fr) * 1985-05-13 1986-11-20 Georg Hirmann Unite de puissance
DE9205418U1 (de) * 1992-04-21 1993-08-19 Hydraulik Techniek, Emmen Druckkörper
WO2007050016A1 (fr) * 2005-10-25 2007-05-03 Maxgrepp Teknik Ab Coussin de levage cuneiforme
WO2013050047A1 (fr) * 2011-10-07 2013-04-11 Kpf Arkitekter A/S Système hydraulique
EP3766680A1 (fr) * 2019-07-19 2021-01-20 MULTIVAC Sepp Haggenmüller SE & Co. KG Station de travail pour une machine d'emballage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0540073Y2 (fr) * 1988-07-22 1993-10-12
JP4936097B2 (ja) * 2005-06-07 2012-05-23 広幸 井元 スピードカバー
JP6534209B2 (ja) * 2015-10-07 2019-06-26 株式会社ケー・エフ・シー 鋼管膨張パック、鋼管膨張体及びトンネルの構築方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887877A (en) * 1931-06-01 1932-11-15 George W Shaffer Hose coupling
US2976888A (en) * 1957-05-24 1961-03-28 Henry H Merriman Coupling for tube expander
DE1840096U (de) * 1961-05-02 1961-10-26 Gumba Gummi Im Bauwesen G M B Flachpresse aus gummi oder aus gummierten geweben.
US3084961A (en) * 1958-10-31 1963-04-09 Henry H Merriman Coupling for tube expander
US3121577A (en) * 1960-04-25 1964-02-18 Henry H Merriman Inflatable tube hose fitting
FR2125216A3 (fr) * 1971-02-19 1972-09-29 Campenon Bernard Europe
DE7415621U (de) * 1974-10-10 Vetter M Hebezeug
WO1979000022A1 (fr) * 1977-07-01 1979-01-25 W Holmes Methode et dispositif de levage hydraulique
DE2802716A1 (de) * 1978-01-23 1979-07-26 Horst Jansen Druckbehaelter fuer fluids, pasten o.dgl.
DE2919939A1 (de) * 1979-05-17 1980-11-20 Rasmussen Gmbh Vorrichtung zum festspannen eines schlauches auf einem rohrfoermigen element

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7415621U (de) * 1974-10-10 Vetter M Hebezeug
US1887877A (en) * 1931-06-01 1932-11-15 George W Shaffer Hose coupling
US2976888A (en) * 1957-05-24 1961-03-28 Henry H Merriman Coupling for tube expander
US3084961A (en) * 1958-10-31 1963-04-09 Henry H Merriman Coupling for tube expander
US3121577A (en) * 1960-04-25 1964-02-18 Henry H Merriman Inflatable tube hose fitting
DE1840096U (de) * 1961-05-02 1961-10-26 Gumba Gummi Im Bauwesen G M B Flachpresse aus gummi oder aus gummierten geweben.
FR2125216A3 (fr) * 1971-02-19 1972-09-29 Campenon Bernard Europe
WO1979000022A1 (fr) * 1977-07-01 1979-01-25 W Holmes Methode et dispositif de levage hydraulique
DE2802716A1 (de) * 1978-01-23 1979-07-26 Horst Jansen Druckbehaelter fuer fluids, pasten o.dgl.
DE2919939A1 (de) * 1979-05-17 1980-11-20 Rasmussen Gmbh Vorrichtung zum festspannen eines schlauches auf einem rohrfoermigen element

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006802A1 (fr) * 1985-05-13 1986-11-20 Georg Hirmann Unite de puissance
DE9205418U1 (de) * 1992-04-21 1993-08-19 Hydraulik Techniek, Emmen Druckkörper
EP0566905A1 (fr) * 1992-04-21 1993-10-27 Hydraulik Techniek Elément de pression
WO2007050016A1 (fr) * 2005-10-25 2007-05-03 Maxgrepp Teknik Ab Coussin de levage cuneiforme
AU2006306833B2 (en) * 2005-10-25 2011-06-30 Maxgrepp Teknik Ab Wedge-formed lifting cushion
US8215615B2 (en) 2005-10-25 2012-07-10 Karl-Olof Niklasson Wedge-formed lifting cushion
WO2013050047A1 (fr) * 2011-10-07 2013-04-11 Kpf Arkitekter A/S Système hydraulique
EP3766680A1 (fr) * 2019-07-19 2021-01-20 MULTIVAC Sepp Haggenmüller SE & Co. KG Station de travail pour une machine d'emballage
DE102019210728A1 (de) * 2019-07-19 2021-01-21 Multivac Sepp Haggenmüller Se & Co. Kg Arbeitsstation für eine Verpackungsmaschine
US11279507B2 (en) 2019-07-19 2022-03-22 Multivac Sepp Haggenmueller Se & Co. Kg Working station for a packaging machine

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Publication number Publication date
JPS59158796A (ja) 1984-09-08

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