EP0060181A1 - Vorgespannter hydropneumatischer Druckspeicher mit Überdrucksicherung - Google Patents

Vorgespannter hydropneumatischer Druckspeicher mit Überdrucksicherung Download PDF

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Publication number
EP0060181A1
EP0060181A1 EP82400344A EP82400344A EP0060181A1 EP 0060181 A1 EP0060181 A1 EP 0060181A1 EP 82400344 A EP82400344 A EP 82400344A EP 82400344 A EP82400344 A EP 82400344A EP 0060181 A1 EP0060181 A1 EP 0060181A1
Authority
EP
European Patent Office
Prior art keywords
plug
central
membrane
accumulator
accumulator according
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
EP82400344A
Other languages
English (en)
French (fr)
Other versions
EP0060181B1 (de
Inventor
Louis-Claude Porel
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.)
Hydro Rene Leduc SA
Original Assignee
Hydro Rene Leduc 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
Priority claimed from FR8103926A external-priority patent/FR2500892A1/fr
Priority claimed from FR8109206A external-priority patent/FR2505417A2/fr
Application filed by Hydro Rene Leduc SA filed Critical Hydro Rene Leduc SA
Priority to AT82400344T priority Critical patent/ATE18933T1/de
Publication of EP0060181A1 publication Critical patent/EP0060181A1/de
Application granted granted Critical
Publication of EP0060181B1 publication Critical patent/EP0060181B1/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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/22—Liquid port constructions
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/106—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means characterised by the way housing components are assembled
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/12—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery
    • F15B1/125—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery characterised by the attachment means
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid ports having valve means
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports
    • F15B2201/4155—Gas ports having valve means
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/43—Anti-extrusion means
    • F15B2201/435—Anti-extrusion means being fixed to the separating means

Definitions

  • the present invention relates to improvements in oleo-pneumatic accumulators of the type comprising two enclosures separated by a deformable wall, made of rubber, one of the enclosures being filled with gas under pressure and the other receiving hydraulic fluid under pressure; the parts constituting said accumulator being kept assembled by a prestressed device.
  • an oleopneumatic accumulator consisting of two substantially hemispherical shells, joined to each other with interposition a flexible membrane and a shim of cylindrical thickness, the two shells and the shim being held tight against each other by an external belt subjected before assembly to a preliminary prestressing generating a clamping force greater than l 'maximum separation effort of the same parts when the accumulator thus formed is subjected to the maximum operating pressure.
  • the prestressed accumulators according to patent application No. 80.04319 and its addition No. 80.09781 give excellent results, but they have several drawbacks.
  • their mass production is delicate, because a fairly complex mechanism is required, the implementation of which requires time to arrive at prior tensioning of the cylindrical belt surrounding the parts. Then, it turns out that when the prior tensioning force is released, part of the prestress is absorbed by a relative crushing of the wedge and by a deformation, even very slight of the threads. As a result, the value of the prestress which remains after assembly of the parts is quite variable.
  • the object of the present invention is to combine the advantages of the two manufacturing methods described above, which makes it possible to obtain a prestressed hydraulic accumulator - and therefore able to withstand very high pressures - while being much more costly to manufacture. lower than that of the hydraulic accumulators currently used.
  • This combination also has other advantages relating to the precision and reliability of the construction which will be explained below.
  • the present invention relates to an oleopneumatic accumulator comprising two enclosures separated by a flexible membrane, one of the enclosures being filled with pressurized gas, the other being connected to a hydraulic circuit also under pressure, the various parts being held tight against one another by means of assembly put beforehand under a determined tension so as to ensure a prestressing greater than the separation force caused by the maximum hydraulic pressure of use, said accumulator being constituted by a cylindrical body disposed between two plugs which are connected one to the another by a plurality of tie rods, said tie rods being tensioned beforehand so as to ensure prestressed tightening.
  • the two plugs are connected to each other by a single central tie passing through them at their centers.
  • the central cylindrical body is bevelled at at least one of its ends in order on the one hand to have a self-centering of the parts and on the other hand, to introduce into the assembly a radial component which, at the Longitudinal prestress superimposes a radial prestress.
  • the accumulator is constituted by a tubular body 1 closed at its two ends by plugs 2 and 3 , the flexible membrane 4 being anchored by blocking its periphery 5, provided with a heel , between the upper edge of the cylindrical body 1 and the lower face of the plug 2.
  • the two plugs 2 and 3 are of a diameter greater than that of the cylindrical body 1 and are connected to the other by a plurality of tie rods 6 so that the body 1 is compressed by the traction exerted by these tie rods.
  • these tie rods 6 are constituted by threaded rods, one end 6a being screwed into a thread formed in the mass of the plug 2, the other end 6b being provided with a thread on which a nut 7 engages which bears against the external wall of the plug 3.
  • the bolts 7 can engage in housings 8 hollowed out in the wall of the plug 3.
  • one of the ends of the central body 1 has a conical surface 1a which comes to bear against a conical surface of the same slope 3a formed in the internal wall of the corresponding plug.
  • the plug 2 is provided with a gas filling valve 9 and the plug 3 with a conduit 10 intended to be connected to a hydraulic circuit.
  • the prestressing is carried out by means of a hydraulic jack whose body 11 is coupled to the tie rod means 12 to the tie rods 6 previously described; the piston 13 of the jack is supported on the external face of the plug 3; while by the tie rods 12 and 6 the cylinder body exerts traction on the plug 2.
  • the internal bore of the jack body 11 is strictly equal to the internal bore of the central body 1.
  • the hydraulic pressure is introduced into the chamber 14 of the jack and, when the desired value "p" of prestressing is reached, the bolts 7 are screwed until they come into contact with the outer wall of the plug 3 and the hydraulic pressure is released.
  • Figures 3 to 9 show a second embodiment of the invention consisting in replacing the tie rods 6 placed around the tube 1 outside thereof by a single tie rod axially passing through the two plugs 2 and 3, the cylindrical body 1 and the membrane 4.
  • the accumulator consists of a hollow cylindrical central body 1, between two upper and lower plugs 2 and 3.
  • the upper plug 2 is laid flat on the upper end of the cylindrical body 1; while the lower plug 3 comprises a skirt 3b connecting with the lower end of said cylindrical body 1.
  • the upper plug 2 has an opening 15, formed in its center and the lower plug 3 an opening 16, also formed in its center.
  • the three parts 1, 2, 3 constituting the accumulator are assembled by a central tie-rod 17.
  • This tie-rod 17 comprises a head 18 bearing against the external wall of the plug 3 and a threaded end 19 on which a nut 20 which is supported is screwed on the outer wall of the plug 2.
  • the membrane 4 is fixed by anchoring and pinching its heel 5, formed over its entire periphery, between the plug 2 and the upper end of the central cylindrical body.
  • the membrane additionally comprises a sort of central chimney or sleeve 21 which forms a hollow tube in which the tie rod 17 is housed.
  • the upper edge of the sleeve 21 comprises a bead 22 which engages in a correspondingly shaped groove 23 formed in the wall of the central opening 15 of the plug 2.
  • the base 4a of the membrane has an annular shape practically matching the shape of the annular space 24 formed by the internal wall of the skirt 3b of the plug 3 and the tie rod 17.
  • the plug 3 has a bore 25 which communicates with the space 24 by a plurality of orifices 26.
  • the bore 25 is provided with a thread 27 which allows the accumulator to be screwed onto a socket (not shown) putting said bore 25 in communication with any suitable hydraulic circuit (also not shown) .
  • the lower part 4a of the membrane 4 is provided with pads 28 opposite the openings 26.
  • the plug 2 is provided with a lateral opening 29 which, by means of a bent pipe 30, provided with a non-return valve 31, communicates with the enclosure to be filled with gas under pressure.
  • FIG. 4 shows two alternative embodiments according to which the central sleeve of the membrane does not rise over the entire height of the interior volume of the accumulator but only over a portion of this height.
  • the central sleeve 21 of the membrane 4 only rises over about a quarter of the height of the internal volume and is simply fixed by a rod 32 which blocks it in a groove 33 formed on the tie rod 17.
  • a rod 32 which blocks it in a groove 33 formed on the tie rod 17.
  • pads 36 being in two parts riveted one on the other instead of being included in the mass of the rubber like the pads 28 of FIG. 3.
  • the central tie-rod keeps the parts 1, 2 and 3 assembled under prestressing so that when the pressure of the hydraulic fluid exceeds a predetermined value, the elongation of the tie-rod 17 is such that a leak appears between the connection between the cylindrical body 1 and plug 2 or plug 3; this has the result that the hydraulic pressure cannot in any case exceed a predetermined maximum value, a value which is a function of the elastic characteristics of the tie rod 17 and of the preload to which the parts are subjected.
  • Figure 6 shows an alternative embodiment of the accumulator described in Figures 3 to 5 which has the advantage of improving the operation of said accumulator in the event of overpressure.
  • a chamfer is la.
  • the skirt 3b is also machined so that the bearing surfaces of the base of the cylindrical body 1 and of the skirt 3b are equal.
  • the section D2 of the base of the cylindrical body 1 is then greater than the section D1 subjected, at the top of the body 1 to the hydraulic pressure located in the space 24: this will result in that in the event of overpressure the leak will occur always between the body 1 and the skirt 3b and never between the body 1 and the plug 2.
  • Figure 7 shows another alternative embodiment.
  • the method of anchoring the membrane 4 by means of a heel 5 as shown in FIGS. 3 to 6, has the drawback that the surface of the section D1, mentioned above, is not rigorously determined . Indeed, a greater or lesser tightness of this pinching can allow the hydraulic fluid to creep between the membrane and the upper body 1, which will have the effect that the section Dl on which the hydraulic pressure acts will always be slightly greater to the section of the internal bore of the cylindrical body 1, but of an amount which cannot be determined in a rigorous manner. It is for this reason that in FIG. 6, the section D1 has been represented as being larger than the internal diameter of the cylindrical body 1, but this indication is an approximation.
  • This elastic washer 40 is pierced with a central hole through which pass the tie rod 17 and the upper edge of the sleeve 21. At the height of this central hole, the tie rod 17 has a groove 33; so that the end of the sleeve 21 is locked in this groove 33 by the rounded edge 40a of the washer 40.
  • the outer edge 4b of the membrane 4 is pinched in the corner formed by the junction of the cylindrical body 1 and the plug 2 by the rounded peripheral edge 40b of the washer 40.
  • the more the tie-rod 17: tightness in tension the more the elastic washer 40 will forcefully wedge the sleeve 21 in the groove 33 and the edge 4a of the membrane in the corner.
  • This arrangement is particularly advantageous, because it is very economical while being very reliable.
  • the accumulators shown in Figures 3 to 7 are prestressed.
  • Figure 8 we screw on the threaded end 19 of the tie rod 17, the end of the rod 37a of the piston 37 a hydraulic cylinder 38 which is supported by a cylindrical wedge 39 on the plug 2. Thanks to this cylinder, on the one hand a compressive force is applied to the parts 2, 1 and 3, force collected by the elasticity of the metal of which these parts are made and on the other hand a tensile force on the tie rod 17, also cashed by the elasticity of the metal from which the tie rod is made 17. When the predetermined maximum force is reached, the nut 20 is blocked on the plug 2 and then the pressure is released in the jack 38. The elasticity of the parts 1 , 2 and 3 on the one hand and the tie rod 17 has the result that the assembly of parts 1, 2 and 3 is carried out with prestressing.
  • an oleopneumatic accumulator having a capacity of 1 liter has been produced.
  • hydraulic fluid was introduced under a pressure of 100 bars; then, the nut 20 was blocked on the thread 19 by means of a torque wrench so as to have a determined tightening torque; then the assembly cylinder 38 was dismantled and the accumulator was placed on a test bench and hydraulic fluid was forced at 25, 26, 24, until a hydraulic fluid leak appeared between the the base of the cylindrical body 1 and the skirt 3a of the plug; the pressure P1 for which this leak occurred was then noted.
  • the accumulator is then adjusted to operate with a maximum pressure of 400 bar.
  • the accumulator tested underwent 5 million cycles and did not show the slightest trace of deterioration upon dismantling, while the usual accumulators show traces of deterioration after approximately 150,000 cycles.
  • a pressure relief valve is a known, extremely simple member, constituted by a valve constrained by a calibrated spring: when the hydraulic pressure exceeds a predetermined value, the ball lifts and the hydraulic fluid flows towards the reservoir.
  • a pressure relief valve of perfectly functioning is obtained. satisfactory.
  • the capacity of the accumulator is determined experimentally as a function of the maximum flow rate of the circuit for which it is intended.
  • Such a pressure relief valve will be cheaper than a large spring-loaded valve, will not be susceptible to dirt that may be in the liquid, will have a leakage section such that there will be no more high speed fluid flow that erodes the metal and will work without causing overpressure.
  • the two ends of the central body 1 are bevelled as has been described for the conical surface 1a in connection with FIG. 1.
  • the two ends of the central body 1 are bevelled as has been described for the conical surface 1a in connection with FIG. 1.
  • the separation membrane 4 in a form such that it is cylindrical at its upper part, as shown, and that this cylindrical part is arranged inside the upper part of the central body 1, itself cylindrical, it follows that the diameter D 3 of the circle according to which the pressure acts on the upper plug 2 is slightly less (due to the thickness of the membrane) than the diameter D 4 of the circle according to which the pressure acts on the lower plug 3: it follows that when the pressure admitted into the accumulator exerts on the central rod 17 a force greater than that of the prestress, the cylindrical body 1 and the lower plug 3 separate slightly, causing a leakage of the liquid, the separation never occurring at the connection between the plug 2 and the body 1.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
EP82400344A 1981-02-27 1982-02-26 Vorgespannter hydropneumatischer Druckspeicher mit Überdrucksicherung Expired EP0060181B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82400344T ATE18933T1 (de) 1981-02-27 1982-02-26 Vorgespannter hydropneumatischer druckspeicher mit ueberdrucksicherung.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8103926 1981-02-27
FR8103926A FR2500892A1 (fr) 1981-02-27 1981-02-27 Perfectionnements aux accumulateurs oleo-pneumatiques a assemblage par precontrainte
FR8109206A FR2505417A2 (fr) 1981-05-08 1981-05-08 Perfectionnements aux accumulateurs oleo-pneumatiques a assemblage par precontrainte
FR8109206 1981-05-08

Publications (2)

Publication Number Publication Date
EP0060181A1 true EP0060181A1 (de) 1982-09-15
EP0060181B1 EP0060181B1 (de) 1986-04-02

Family

ID=26222249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400344A Expired EP0060181B1 (de) 1981-02-27 1982-02-26 Vorgespannter hydropneumatischer Druckspeicher mit Überdrucksicherung

Country Status (7)

Country Link
US (1) US4449552A (de)
EP (1) EP0060181B1 (de)
CA (1) CA1165663A (de)
CH (1) CH652174A5 (de)
DE (1) DE3270209D1 (de)
ES (1) ES509907A0 (de)
YU (1) YU43068B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2809787A1 (fr) * 2000-05-31 2001-12-07 Mannesmann Sachs Ag Soupape de remplissage pour un sac a gaz
FR2938308A1 (fr) * 2008-11-07 2010-05-14 Hydro Leduc Perfectionnements aux accumulateurs oleopneumatiques a piston
EP2453140A3 (de) * 2010-11-10 2013-10-09 Norgren GmbH Flüssigkeitsbetriebener Aktuator mit verformbarem Abdichtelement
US9165709B2 (en) 2011-05-23 2015-10-20 Phoenix Contact Gmbh & Co Kg Current transformer

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6116585A (en) * 1997-08-11 2000-09-12 Mannesmann Sachs Ag Pressure holder with an enclosed gas mass
DE10029150C1 (de) * 2000-06-14 2001-08-16 Mannesmann Sachs Ag Druckbehälter, insbesondere für einen Schwingungsdämpfer
US6651698B1 (en) * 2002-05-31 2003-11-25 Wilkes & Mclean Ltd. Suppressor for manifold fluid line
DE102007042865B4 (de) * 2007-09-08 2011-09-22 Zf Friedrichshafen Ag Selbstpumpendes hydropneumatisches Federbein
US8640314B2 (en) * 2010-08-03 2014-02-04 Federal-Mogul Corporation Piston assembly transportation and installation apparatus and methods of transporting and installing a piston assembly therewith
EP2722575B1 (de) * 2012-10-16 2017-08-30 Water Powered Technologies Limited Gasfederakkumulator
US9127811B2 (en) 2013-06-05 2015-09-08 Louis P. Vickio, Jr. Hydraulic accumulator
CN105889145B (zh) * 2014-12-11 2018-11-16 西安航天发动机厂 微压响应储液器
USD867986S1 (en) * 2017-11-07 2019-11-26 Energy2Go Srl Accumulator charging apparatus
USD902153S1 (en) * 2018-08-03 2020-11-17 Aktsionerno Droujestvo “Start” Ad Insert for accumulator recirculation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1150762A (fr) * 1956-04-05 1958-01-17 Perfectionnements aux enceintes de fluides pouvant être mises sous pression et comportant un séparateur
FR1378955A (fr) * 1963-09-28 1964-11-20 Perfectionnements apportés aux soupapes notamment pour réservoirs de pression
DE1525485A1 (de) * 1966-02-17 1969-08-14 Jean Mercier Druckbehaelter mit einer nachgiebigen Trennwand
FR2290277A1 (fr) * 1974-11-08 1976-06-04 Maschf Augsburg Nuernberg Ag Dispositif pour le serrage et le desserrage d'assemblages a vis et ecrou

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919718A (en) * 1952-12-23 1960-01-05 Mercier Jean Pressure accumulator
US2947326A (en) * 1955-03-14 1960-08-02 Mercier Jean Pressure device
US3140729A (en) * 1956-02-23 1964-07-14 Mercier Jean Valve assembly
DE2430073A1 (de) * 1974-06-22 1976-01-08 Kloeckner Werke Ag Arbeitszylinder
DE2430261A1 (de) * 1974-06-24 1976-01-15 Kloeckner Werke Ag Ringfoermig ausgebildete kolben-zylinder-einheit
ES499284A0 (es) * 1980-02-27 1982-01-01 Leduc Rene Hydro Sa Procedimiento de fabricacion de acumuladores hidraulicos

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1150762A (fr) * 1956-04-05 1958-01-17 Perfectionnements aux enceintes de fluides pouvant être mises sous pression et comportant un séparateur
FR1378955A (fr) * 1963-09-28 1964-11-20 Perfectionnements apportés aux soupapes notamment pour réservoirs de pression
DE1525485A1 (de) * 1966-02-17 1969-08-14 Jean Mercier Druckbehaelter mit einer nachgiebigen Trennwand
FR2290277A1 (fr) * 1974-11-08 1976-06-04 Maschf Augsburg Nuernberg Ag Dispositif pour le serrage et le desserrage d'assemblages a vis et ecrou

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2809787A1 (fr) * 2000-05-31 2001-12-07 Mannesmann Sachs Ag Soupape de remplissage pour un sac a gaz
FR2938308A1 (fr) * 2008-11-07 2010-05-14 Hydro Leduc Perfectionnements aux accumulateurs oleopneumatiques a piston
EP2453140A3 (de) * 2010-11-10 2013-10-09 Norgren GmbH Flüssigkeitsbetriebener Aktuator mit verformbarem Abdichtelement
US9165709B2 (en) 2011-05-23 2015-10-20 Phoenix Contact Gmbh & Co Kg Current transformer

Also Published As

Publication number Publication date
ES8303623A1 (es) 1983-02-01
CH652174A5 (fr) 1985-10-31
EP0060181B1 (de) 1986-04-02
YU43068B (en) 1989-02-28
CA1165663A (en) 1984-04-17
YU43982A (en) 1985-03-20
ES509907A0 (es) 1983-02-01
DE3270209D1 (en) 1986-05-07
US4449552A (en) 1984-05-22

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