EP0031617A1 - Reciprocating positive displacement machine - Google Patents

Reciprocating positive displacement machine Download PDF

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Publication number
EP0031617A1
EP0031617A1 EP80201201A EP80201201A EP0031617A1 EP 0031617 A1 EP0031617 A1 EP 0031617A1 EP 80201201 A EP80201201 A EP 80201201A EP 80201201 A EP80201201 A EP 80201201A EP 0031617 A1 EP0031617 A1 EP 0031617A1
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EP
European Patent Office
Prior art keywords
piston
chambers
cylinder
fluid
aforementioned
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
EP80201201A
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German (de)
French (fr)
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EP0031617B1 (en
Inventor
Didier Vokaer
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Individual
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Individual
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Priority claimed from BE0/198776A external-priority patent/BE880897A/en
Application filed by Individual filed Critical Individual
Priority to AT80201201T priority Critical patent/ATE13926T1/en
Publication of EP0031617A1 publication Critical patent/EP0031617A1/en
Application granted granted Critical
Publication of EP0031617B1 publication Critical patent/EP0031617B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B11/00—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L25/00—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
    • F01L25/02—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means
    • F01L25/04—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means by working-fluid of machine or engine, e.g. free-piston machine

Definitions

  • the present invention relates to a volumetric machine, motor and receiver, with reciprocating movement.
  • the object of the invention is to provide a machine which groups, within a single cylinder, at least two volumetric machines, drive and receiver, with reciprocating motion, this machine having, compared to known volumetric machines, the parts of which driving, distinct from the receiving parts, are joined to the latter by means of transmission, many advantages. Indeed, first of all, the absence, in the machine according to the invention, of means of transmission between the driving and receiving parts makes it possible to considerably simplify its construction, given the reduced number and the simple profiles of the parts which the machine includes, and its maintenance, by eliminating the monitoring and replacement of jams as well as the adjustments and alignments required by machines with separate driving and receiving parts.
  • the machine according to the invention still thanks to the absence of transmission means, has a seal that is simpler to produce than that of known machines and is not subject to the mechanical losses and to the wear and tear generated in the latter by said means. means of transmission.
  • the machine according to the invention also offers the advantage, for a reduced overall size ensuring it a high specific power, of constituting a unit, particularly robust, which can, with the driving agent a pressurized fluid, be used just as well as motor pump as a single or multi-stage motor-compressor, autonomous group for the production of cold by the Rankine cycle, heat pump, pressure transformer, electricity generator, pressurized fluid generator intended to actuate any mechanical device, vacuum pump, etc ...
  • the machine comprises a cylinder and a free double-acting piston mounted in this cylinder, the latter and the piston being arranged to delimit, at each of the ends of the cylinder, at least two separate chambers l ' one from the other, means being provided for the alternative suction and delivery of a fluid in two of the chambers of the machine located on either side of the piston, as well as distribution means for the intake and the alternative exhaust of a working fluid in the two other chambers located on either side of the piston.
  • the cylinder and the piston, considered in the middle position are symmetrical with respect to a plane perpendicular to the axis of the cylinder and located at equal distances from the ends thereof.
  • the aforementioned chambers and the cylinder are coaxial.
  • the machine according to the invention comprises a cylinder 1 and a double-acting free piston 2, mounted in this cylinder, which are arranged to delimit, at each of the ends of the cylinder, at least two chambers 3 - 3 ' and 4 - 4 'separated from each other, means 5 (FIG. 4) being provided for the alternative suction and delivery of one or two receiving fluids in chambers 4 and 4', as well as means distribution valve 6 ( Figure 4) for the alternative intake and exhaust of a working fluid in chambers 3 and 3 °.
  • the cylinder 1 and the piston 2, considered in the middle position are symmetrical with respect to a perpendicular plane, of trace 7 (FIG.
  • the cylinder 1 is constituted by a tubular element 9 closed at each of its ends, by a cylinder head 10 - 10 '.
  • a part 11 - 11 ', coaxial with the tubular element 9 is fixed to each of the cylinder heads, the piston 2 having, at each of its ends, a recess 12 - 12', coaxial to element 9 and of section corresponding to that of part 11 - 11 1 with which it is intended to cooperate to form one of chambers 4 - 4 '.
  • each of the cylinder heads 10 - 10 1 is profiled so as to present a recess 13 - 13 'coaxial with the element 9, the piston 2 having, at each of its ends, a projection 14 - 14 'coaxial with the element 9 and of section corresponding to that of the recess of the cylinder head with which it is intended to cooperate to form one of the chambers 4 - 4'.
  • the working fluid expands in the chamber 3, it imparts on the piston 2 a force which is communicated by the latter to the receiving fluid, included in the chamber 4 ', to compress it; when the working fluid expands in the chamber 3 ', the piston compresses the receiving fluid in the chamber 4.
  • the chambers 4 - 4' can either fulfill the same functions, for example be used as a compressor, or fulfill different functions, for example one chamber can be used as a compressor, while the other chamber can be used as a pump.
  • the machine can comprise, at each end of the cylinder 1, a number of chambers greater than two, without increasing the size of the machine.
  • the parts 11 - 11 'above mentioned each have a recess 15 - 15 'coaxial with the element 9 while the piston 2 has, in each of these recesses 12 - 12', a projection 16 - 16 'coaxial with the element 9 and of section corresponding to that of the recess 15 - 15 ', this recess 15 - 15' and the corresponding projection 16 - 16 'delimiting a third chamber 17 - 17' at each end of the cylinder.
  • Chambers 4 and 17 and 4 'and 17 ° can either, as shown in Figure 3, not communicate with each other, or communicate with each other.
  • the driving trigger ensuring the operation of the machine according to the invention can of course be part of any process in open or closed cycle, with or without combustion, the latter being able to be internal or external to the cylinder, with controlled ignition or not.
  • the piston 2 could also, according to the invention, include elements allowing the machine to function as an electricity generator or a generator of pressurized fluid intended to actuate any mechanical device.
  • the chambers 3 and 3 ′ are placed in communication, by pipes 20 and 20 ′, with the chambers 21 and 21 ′ of the distributor and the above-mentioned control is carried out by a pressure wave created in one of the chambers 3 - 3 ', when the piston 2 arrives at one of its limit switches, and transmitted via the corresponding tubing to the chamber 21 - 21' to move the drawer 19, in the opposite direction to that of the piston 2 , towards one of its two rest positions.
  • Admission takes place in chamber 3 until the piston 2 closes the orifice 25, the width of the annular groove 26 therefore determining the intake stroke of the piston.
  • the fluid expands by communicating its energy to the piston 2 which continues its stroke, according to arrow 28, and causes the escape of the expanded fluid, contained in the chamber 3 °, via the orifice 29, the pipe 30 and the aforementioned orifices 31 and 32 of the distributor and this, until the moment when the exhaust orifice 29 is closed by the piston 2.
  • the movement of the piston 2 is damped by the cushion of fluid which forms in the 3rd chamber whose pressure increases.
  • the reciprocating movement of the piston therefore continues as long as the supply of pressurized fluid is ensured, via the orifice 22, and the force communicated to the piston 2 compresses alternately.
  • the slide 19 can be equipped with a end-of-stroke damping device. For starting the machine, it is useful to provide a start-up phase during which the piston 2 and the slide 19 are positioned correctly relative to each other. This positioning can be achieved during a sequence of opening / closing of solenoid valves judiciously arranged in the circuit. This sequence fixed once and for all allowing, when the high pressure fluid is admitted, that the piston and the slide automatically place themselves in the starting position and this, whatever their previous positions.
  • Tubes 36 connect the orifices 25 to a source of pressurized working fluid while the pipes 37 connect the orifices 29 to the low pressure, calibrated valves 38 being provided in these pipes 37 to allow the passage of the relaxed working fluid from the chambers 3 and 3 'towards the low pressure and to prevent this passage when the pressure prevailing in the chambers 3 and 3' is greater than a determined low pressure.
  • Two peripheral grooves 39 are formed in the piston 2, as well as pipes 40 each putting grooves 39 in communication with the corresponding chamber 3 or 3 ° to distribute the fluid under pressure in these chambers.
  • the grooves 39 are arranged so as to come alternately opposite the intake orifices 25 before the corresponding end of stroke of the piston 2 and when the corresponding exhaust port 29 is closed by the piston. However, it is not essential that this light 29 is closed by the piston, because the exhaust closes, thanks to the valve 38, as soon as there is a pressure increase in the chamber 3 or 3 '.

Abstract

1. Alternating-motion, driving and driven volumetric machine, comprising a cylinder (1) and a free double-action piston (2) mounted therein, characterized in that the cylinder (1) and the piston (2) are so arranged as to bound at each one of the cylinder ends, at least three chambers (3-3', 4-4' and 17-17') the one of which at least is separated from the other chambers, means being provided for alternately sucking and discharging at least one receiving fluid into four of those chambers located two-by-two on either side of the piston (2), as well as timing means for alternately feeding and exhausting a motive fluid into the two other chambers located on either side of the piston (2), the motive fluid being separate from the receiving fluid.

Description

La présente invention est relative à une machine volumétrique, motrice et réceptrice, à mouvement alternatif.The present invention relates to a volumetric machine, motor and receiver, with reciprocating movement.

L'invention a pour but de procurer une machine qui groupe, à l'intérieur d'un seul cylindre, au moins deux machines volumétriques, motrices et réceptrices, à mouvement alternatif, cette machine présentant, par rapport aux machines volumétriques connues dont les parties motrices, distinctes des parties réceptrices, sont réunies à ces dernières par des moyens de transmission, de nombreux avantages. En effet, tout d'abord, l'absence, dans la machine suivant l'invention, de moyens de transmission entre les parties motrices et réceptrices permet de simplifier considérablement sa construction, vu le nombre réduit et les profils simples des pièces que la machine comprend, et son entretien, en supprimant la surveillance et le remplacement de bourrages ainsi que les réglages et alignements nécessités par des machines à parties motrices et réceptrices séparées. La machine suivant l'invention, toujours grace à l'absence de moyens de transmission, a une étanchéité plus simple à réaliser que celle des machines connues et n'est pas soumise aux pertes mécaniques et à l'usure engendrées dans ces dernières par lesdits moyens de transmission.The object of the invention is to provide a machine which groups, within a single cylinder, at least two volumetric machines, drive and receiver, with reciprocating motion, this machine having, compared to known volumetric machines, the parts of which driving, distinct from the receiving parts, are joined to the latter by means of transmission, many advantages. Indeed, first of all, the absence, in the machine according to the invention, of means of transmission between the driving and receiving parts makes it possible to considerably simplify its construction, given the reduced number and the simple profiles of the parts which the machine includes, and its maintenance, by eliminating the monitoring and replacement of jams as well as the adjustments and alignments required by machines with separate driving and receiving parts. The machine according to the invention, still thanks to the absence of transmission means, has a seal that is simpler to produce than that of known machines and is not subject to the mechanical losses and to the wear and tear generated in the latter by said means. means of transmission.

La machine suivant l'invention offre également l'avantage, pour un encombrement réduit lui assurant une puissance spécifique élevée, de constituer une unité, particulièrement robuste, pouvant, avec comme agent moteur un fluide sous pression, être utilisée tout aussi bien comme moto-pompe que comme moto-compresseur à un ou plusieurs étages, groupe autonome pour la production de froid par le cycle de Rankine, pompe à chaleur, transformateur de pression, générateur d'électricité, générateur de fluide sous pression destiné à actionner tout dispositif mécanique, pompe à vide, etc...The machine according to the invention also offers the advantage, for a reduced overall size ensuring it a high specific power, of constituting a unit, particularly robust, which can, with the driving agent a pressurized fluid, be used just as well as motor pump as a single or multi-stage motor-compressor, autonomous group for the production of cold by the Rankine cycle, heat pump, pressure transformer, electricity generator, pressurized fluid generator intended to actuate any mechanical device, vacuum pump, etc ...

A cet effet, suivant l'invention, la machine comprend un cylindre et un piston libre à double effet monté dans ce cylindre, ce dernier et le piston étant agencés pour délimiter, à chacune des extrémités du cylindre, au moins deux chambres séparées l'une de l'autre, des moyens étant prévus pour l'aspiration et le refoulement alternatifs d'un fluide dans deux des chambres de la machine situées de part et d'autre du piston, ainsi que des moyens de distribution pour l'admission et l'échappement alternatifs d'un fluide moteur dans les deux autres chambres situées de part et d'autre du piston.To this end, according to the invention, the machine comprises a cylinder and a free double-acting piston mounted in this cylinder, the latter and the piston being arranged to delimit, at each of the ends of the cylinder, at least two separate chambers l ' one from the other, means being provided for the alternative suction and delivery of a fluid in two of the chambers of the machine located on either side of the piston, as well as distribution means for the intake and the alternative exhaust of a working fluid in the two other chambers located on either side of the piston.

Suivant une forme de réalisation avantageuse de l'invention, le cylindre et le piston, considérésen position médiane, sont symétriques par rapport à un plan perpendiculaire à l'axe du cylindre et situé à distances égales des extrémités de celui-ci.According to an advantageous embodiment of the invention, the cylinder and the piston, considered in the middle position, are symmetrical with respect to a plane perpendicular to the axis of the cylinder and located at equal distances from the ends thereof.

Suivant un mode de réalisation particulièrement avantageux de l'invention, les chambres précitées et le cylindre sont coaxiaux.According to a particularly advantageous embodiment of the invention, the aforementioned chambers and the cylinder are coaxial.

D'autres détails et particularités de l'invention ressortiront de la description des dessins annexés au présent mémoire et qui représentent, à titre d'exemples non limitatifs, des formes de réalisation particulières de la machine suivant l'invention.

  • La figure 1 est une vue schématique, en élévation et partiellement en coupe, montrant la machine suivant l'invention, les moyens d'admission et d'échappement du fluide moteur ainsi que l'aspiration et le refoulement du fluide récepteur dans les diverses chambres n'étant pas représentés.
  • Les figures 2 et 3 sont des vues analogues à la figure 1 et montrent des variantes de la machine représentée à ladite figure 1.
  • La figure 4 est une vue schématique, en élévation et partiellement en coupe, montrant la machine représentée à la figure 1 et équipée des moyens de distribution susdits du fluide moteur dans deux des chambres de la machine et des moyens d'aspiration et de refoulement du ou des fluides récepteurs dans les deux autres chambres de la machine.
  • La figure 5 est une vue schématique, en élévation et partiellement en coupe, montrant la machine représentée à la figure 1 et équipée de moyens de distribution du fluide moteur constituant une variante des moyens de distribution représentés à la figure 4.
Other details and particularities of the invention will emerge from the description of the drawings annexed to this specification and which represent, by way of non-limiting examples, particular embodiments of the machine according to the invention.
  • Figure 1 is a schematic view, in elevation and partially in section, showing the machine according to the invention, the means of admission and exhaust of the working fluid as well as the aspiration and the delivery of the receiving fluid in the various chambers not being represented.
  • Figures 2 and 3 are views similar to Figure 1 and show variants of the machine shown in said Figure 1.
  • Figure 4 is a schematic view, in elevation and partially in section, showing the machine shown in Figure 1 and equipped with the above-mentioned means for distributing the working fluid in two of the chambers of the machine and means for suction and discharge of the or receiving fluids in the other two chambers of the machine.
  • FIG. 5 is a schematic view, in elevation and partially in section, showing the machine shown in FIG. 1 and equipped with means for distributing the working fluid constituting a variant of the distribution means shown in FIG. 4.

Dans les différentes figures, les mêmes notations de référence désignent des éléments identiques ou analoguesIn the different figures, the same reference notations designate identical or analogous elements

La machine suivant l'invention, montrée aux dessins, comprend un cylindre 1 et un piston libre à double effet 2, monté dans ce cylindre, qui sont agencés pour délimiter, à chacune des extrémités du cylindre, au moins deux chambres 3 - 3' et 4 - 4' séparées l'une de l'autre, des moyens 5 (figure 4) étant prévus pour l'aspiration et le refoulement alternatifs d'un ou deux fluides récepteurs dans les chambres 4 et 4', ainsi que des moyens de distribution 6 (figure 4) pour l'admission et l'échappement alternatifs d'un fluide moteur dans les chambres 3 et 3°. Dans les formes de réalisation représentées, le cylindre 1 et le piston 2, considéré en position médiane, sont symétriques par rapport à un plan perpendiculaire, de trace 7 (figure 1), à l'axe 8 du cylindre et situé à distanceségales des extrémités dudit cylindre, les chambres susdites étant coaxiales à ce dernier. Le cylindre 1 est constitué par un élément tubulaire 9 obturé à chacune de ses extrémités, par une culasse 10 - 10'. Dans la machine montrée à la figure 1, une pièce 11 - 11', coaxiale à l'élément tubulaire 9, est fixée à chacune des culasses, le piston 2 présentant, à chacune de ses extrémités, un évidement 12 - 12', coaxial à l'élément 9 et de section correspondante à celle de la pièce 11 - 111 avec laquelle il est destiné à coopérer pour former une des chambres 4 - 4'. Dans la machine montrée à la figure 2, chacune des culasses 10 - 101 est profilée de manière à présenter un évidement 13 - 13' coaxial à l'élément 9, le piston 2 présentant, à chacune de ses extrémités, une saillie 14 - 14' coaxiale à l'élément 9 et de section correspondante à celle de l'évidement de la culasse avec lequel elle est destinée à coopérer pour former une des chambres 4 - 4'. Quand le fluide moteur se détend dans la chambre 3, il imprime au piston 2 une force qui est communiquée par ce dernier au fluide récepteur, compris dans la chambre 4', pour le comprimer ; lorsque le fluide moteur se détend dans la chambre 3', le piston comprime le fluide récepteur dans la chambre 4. Dans les machines montrées aux figures 1 et 2, les chambres 4 - 4' peuvent soit remplir les mêmes fonctions, par exemple être utilisées comme compresseur, soit remplir des fonctions différentes, par exemple une chambre peut être utilisée comme compresseur, tandis que l'autre chambre peut être utilisée comme pompe.The machine according to the invention, shown in the drawings, comprises a cylinder 1 and a double-acting free piston 2, mounted in this cylinder, which are arranged to delimit, at each of the ends of the cylinder, at least two chambers 3 - 3 ' and 4 - 4 'separated from each other, means 5 (FIG. 4) being provided for the alternative suction and delivery of one or two receiving fluids in chambers 4 and 4', as well as means distribution valve 6 (Figure 4) for the alternative intake and exhaust of a working fluid in chambers 3 and 3 °. In the embodiments shown, the cylinder 1 and the piston 2, considered in the middle position, are symmetrical with respect to a perpendicular plane, of trace 7 (FIG. 1), to the axis 8 of the cylinder and located at equal distances from the ends of said cylinder, the aforementioned chambers being coaxial with the latter. The cylinder 1 is constituted by a tubular element 9 closed at each of its ends, by a cylinder head 10 - 10 '. In the machine shown in FIG. 1, a part 11 - 11 ', coaxial with the tubular element 9, is fixed to each of the cylinder heads, the piston 2 having, at each of its ends, a recess 12 - 12', coaxial to element 9 and of section corresponding to that of part 11 - 11 1 with which it is intended to cooperate to form one of chambers 4 - 4 '. In the machine shown in FIG. 2, each of the cylinder heads 10 - 10 1 is profiled so as to present a recess 13 - 13 'coaxial with the element 9, the piston 2 having, at each of its ends, a projection 14 - 14 'coaxial with the element 9 and of section corresponding to that of the recess of the cylinder head with which it is intended to cooperate to form one of the chambers 4 - 4'. When the working fluid expands in the chamber 3, it imparts on the piston 2 a force which is communicated by the latter to the receiving fluid, included in the chamber 4 ', to compress it; when the working fluid expands in the chamber 3 ', the piston compresses the receiving fluid in the chamber 4. In the machines shown in Figures 1 and 2, the chambers 4 - 4' can either fulfill the same functions, for example be used as a compressor, or fulfill different functions, for example one chamber can be used as a compressor, while the other chamber can be used as a pump.

Suivant l'invention, la machine peut comprendre, à chacune des extrémités du cyclindre 1, un nombre de chambres supérieur à deux et ce, sans accroître pour autant l'encombrement de la machine. En effet, comme montré à la figure 3, les pièces 11 - 11' susdites présentent chacune un évidement 15 - 15' coaxial à l'élément 9 tandis que le piston 2 présente, dans chacun de ces évidements 12 - 12', une saillie 16 - 16' coaxiale à l'élément 9 et de section correspondante à celle de l'évidement 15 - 15', cet évidement 15 - 15' et la saillie 16 - 16' correspondante délimitant une troisième chambre 17 - 17' à chaque extrémité du cylindre. Les chambres 4 et 17 et 4' et 17° peuvent soit, comme montré à la figure 3, ne pas communiquer entre elles, soit communiquer entre elles. Les chambres 4 et 4' de la machine montrée à la figure 3 peuvent constituer un compresseur à double effet, tandis que les chambres 17 = 17' peuvent constituer une pompe à double effet.According to the invention, the machine can comprise, at each end of the cylinder 1, a number of chambers greater than two, without increasing the size of the machine. Indeed, as shown in Figure 3, the parts 11 - 11 'above mentioned each have a recess 15 - 15 'coaxial with the element 9 while the piston 2 has, in each of these recesses 12 - 12', a projection 16 - 16 'coaxial with the element 9 and of section corresponding to that of the recess 15 - 15 ', this recess 15 - 15' and the corresponding projection 16 - 16 'delimiting a third chamber 17 - 17' at each end of the cylinder. Chambers 4 and 17 and 4 'and 17 ° can either, as shown in Figure 3, not communicate with each other, or communicate with each other. The chambers 4 and 4 'of the machine shown in FIG. 3 can constitute a double-acting compressor, while the chambers 17 = 17' can constitute a double-acting pump.

La détente motrice assurant le fonctionnement de la machine suivant l'invention peut bien entendu s'inscrire dans tout processus en cycle ouvert ou fermé, avec ou sans combustion, cette dernière pouvant être interne ou externe au cylindre, avec allumage commandé ou non. On peut prévoir, dans le piston 2, un dispositif d'amortissement du mouvement de ce dernier et/ou un dispositif d'équilibrage dynamique de la machine, comme on pourrait également prévoir, dans ledit piston, un générateur de fluide sous pression, des canalisations de distribution de fluides, et notamment du fluide moteur, comme montré à la figure 4, ces canalisations offrant l'avantage de permettre une injection partielle du fluide, sans organes mécaniques supplémentaires, qui assure un meilleur rendement du cycle moteur de la machine. Le piston 2 pourrait encore, suivant l'invention, comporter des éléments permettant à la machine de fonctionner comme un générateur d'électricité ou un générateur de fluide sous pression destiné à actionner tout dispositif mécanique.The driving trigger ensuring the operation of the machine according to the invention can of course be part of any process in open or closed cycle, with or without combustion, the latter being able to be internal or external to the cylinder, with controlled ignition or not. One can provide, in the piston 2, a device for damping the movement of the latter and / or a dynamic balancing device of the machine, as one could also provide, in said piston, a generator of pressurized fluid, pipes for distributing fluids, and in particular the working fluid, as shown in FIG. 4, these pipes offering the advantage of allowing partial injection of the fluid, without additional mechanical members, which ensures better performance of the engine cycle of the machine. The piston 2 could also, according to the invention, include elements allowing the machine to function as an electricity generator or a generator of pressurized fluid intended to actuate any mechanical device.

La distribution du fluide moteur dans les chambres 3 et 3' de la machine ainsi que son échappement sont assurés, comme montré à la figure 4, par un distributeur à tiroir 18 dont le tiroir 19 est mû, entre ses deux positions de repos, par une commande appropriée, en parfait synchronisme avec le piston 2 afin que le fluide moteur soit admis alternativement dans les chambres 3 et 3'. Dans la forme de réalisation représentée à la figure 4, les chambres 3 et 3' sont mises en communication, par des tubulures 20 et 20', avec les chambres 21 et 21' du distributeur et la commande susdite est réalisée par une onde de pression créée dans une des chambres 3 - 3', lorsque le piston 2 arrive à une de ses fins de course, et transmise via la tubulure correspondante à la chambre 21 - 21' pour déplacer le tiroir 19, en sens opposé de celui du piston 2, vers une de ses deux positions de repos.The distribution of the working fluid in the chambers 3 and 3 'of the machine as well as its exhaust are ensured, as shown in FIG. 4, by a drawer distributor 18 whose drawer 19 is moved, between its two rest positions, by an appropriate command, in perfect synchronism with the piston 2 so that the working fluid is admitted alternately into the chambers 3 and 3 '. In the embodiment shown in FIG. 4, the chambers 3 and 3 ′ are placed in communication, by pipes 20 and 20 ′, with the chambers 21 and 21 ′ of the distributor and the above-mentioned control is carried out by a pressure wave created in one of the chambers 3 - 3 ', when the piston 2 arrives at one of its limit switches, and transmitted via the corresponding tubing to the chamber 21 - 21' to move the drawer 19, in the opposite direction to that of the piston 2 , towards one of its two rest positions.

Dans la position du piston 2 et du tiroir 19 montrée à la figure 4, le fluide moteur haute pression provenant d'une source extérieure à la machine traverse le distributeur 18, via les orifices 22 et 23 et est admis dans la chambre 3, via la tubulure 24, l'orifice d'admission 25 du cylindre, la rainure annulaire de distribution 26 réalisée dans le piston 2 et les canalisations 27 réalisées dans ce dernier et débouchant dans lesdites rainures 26 et la chambre 3. Dès l'admission du fluide dans ladite chambre 3, le piston 2 se met en mouvement suivant la flèche 28 étant donné que l'orifice d'échappement 29 de la chambre 3' est ouvert et mis en communication avec l'échappement via la tubulure 30 et les orifices d'échappement 31 et 32 du distributeur 18, le tiroir de celui-ci coupant l'admission du fluide sous pression dans la chambre 3' ainsi que l'échappement de la chambre 3. L'admission a lieu dans la chambre 3 jusqu'au moment où le piston 2 obture l'orifice 25, la largeur de la rainure annulaire 26 déterminant donc la course d'admission du piston. Dès que l'orifice 25 est obturé, le fluide se détend en communiquant son énergie au piston 2 qui poursuit sa course, suivant la flèche 28, et provoque l'échappement du fluide détendu, contenu dans la chambre 3°, via l'orifice 29, la tubulure 30 et les orifices précités 31 et 32 du distributeur et ce, jusqu'au moment où l'orifice d'échappement 29 est obturé par le piston 2. A ce moment, le mouvement du piston 2 est amorti par le coussin de fluide qui se forme dans la chambre 3° er dont la pression augmente. Comme le fluide est en phase de fin de détente dans la chambre 3, il règne dans cette dernière comme dans la chambre 21 du distributeur une pression basse qui est inférieure à celle du coussin formé dans la chambre 3'. La pression régnant dans cette dernière, qui communique avec la chambre 21' du distributeur, fait basculer le tiroir 19, suivant la flèche 33, vers sa seconde position de repos, ce qui a pour effet de découvrir l'orifice 34 du distributeur et d'autoriser l'admission du fluide haute pression dans la chambre 3', via l'orifice 22, l'orifice 34, la tubulure 35', l'orifice 25' du cylindre 1, la rainure annulaire 26' du piston 2 et les canalisations 27' de ce dernier, l'échappement de la chambre 3, via l'orifice 29' du cylindre 1, la tubulure 30' et les orifices 31 et 32 du distributeur, étant ouvert tandis que l'admission du fluide haute pression dans la chambre 3 et l'échappement de la chambre 3' sont fermés. Le mouvement alternatif du piston se poursuit donc tant que l'alimentation en fluide sous pression est assurée, via l'orifice 22, et la force communiquée au piston 2 comprime alternativement un fluide dans les chambres 4 et 4', l'aspiration et le refoulement du fluide dans ces dernières chambres étant réalisées grâce à des conduits 35 réalisés dans les pièces 11 et 11' et par des soupapes classiques, non représentées, à pression différentielle. Tout comme le piston 2, le tiroir 19 peut être équipé d'un dispositif d'amortissement de fin de course. Pour le démarrage de la machine, il est utile de prévoir une phase de démarrage au cours de laquelle le piston 2 et le tiroir 19 sont positionnés correctement l'un par rapport à l'autre. Ce positionnement peut être réalisé au cours d'une séquence d'ouverture/fermeture d'électrovannes judicieusement disposées dans le circuit. Cette séquence fixée une fois pour toutes permettant, lorsque le fluide haute pression est admis, que le piston et le tiroir se placent automatiquement en position de démarrage et ce, quelles que soient leurs positions antérieures.In the position of the piston 2 and of the slide 19 shown in FIG. 4, the high pressure working fluid coming from a source external to the machine passes through the distributor 18, via the orifices 22 and 23 and is admitted into the chamber 3, via the tubing 24, the intake port 25 of the cylinder, the annular distribution groove 26 made in the piston 2 and the pipes 27 made in the latter and opening into said grooves 26 and the chamber 3. As soon as the fluid is admitted in said chamber 3, the piston 2 sets in motion along the arrow 28 since the exhaust port 29 of the chamber 3 'is open and placed in communication with the exhaust via the pipe 30 and the orifices exhaust 31 and 32 of the distributor 18, the slide of the latter cutting off the admission of the pressurized fluid into the chamber 3 ′ as well as the exhaust of chamber 3. Admission takes place in chamber 3 until the piston 2 closes the orifice 25, the width of the annular groove 26 therefore determining the intake stroke of the piston. As soon as the orifice 25 is closed, the fluid expands by communicating its energy to the piston 2 which continues its stroke, according to arrow 28, and causes the escape of the expanded fluid, contained in the chamber 3 °, via the orifice 29, the pipe 30 and the aforementioned orifices 31 and 32 of the distributor and this, until the moment when the exhaust orifice 29 is closed by the piston 2. At this moment, the movement of the piston 2 is damped by the cushion of fluid which forms in the 3rd chamber whose pressure increases. As the fluid is in the end of expansion phase in chamber 3, there prevails in the latter as in chamber 21 of the dispenser a low pressure which is lower than that of the cushion formed in chamber 3 '. The pressure prevailing in the latter, which communicates with the chamber 21 ′ of the distributor, causes the slide 19 to tilt, according to arrow 33, to its second rest position, which has the effect of discovering the orifice 34 of the distributor and d '' authorize the admission of the high pressure fluid into the chamber 3 ', via the orifice 22, the orifice 34, the tubing 35', the orifice 25 'of the cylinder 1, the annular groove 26' of the piston 2 and the pipes 27 'of the latter, the exhaust from chamber 3, via orifice 29' of cylinder 1, tubing 30 'and orifices 31 and 32 of the distributor, being open while the admission of high pressure fluid into chamber 3 and the exhaust of chamber 3 'are closed. The reciprocating movement of the piston therefore continues as long as the supply of pressurized fluid is ensured, via the orifice 22, and the force communicated to the piston 2 compresses alternately. a fluid in the chambers 4 and 4 ′, the suction and the discharge of the fluid in the latter chambers being carried out by means of conduits 35 produced in the parts 11 and 11 ′ and by conventional valves, not shown, at differential pressure . Like the piston 2, the slide 19 can be equipped with a end-of-stroke damping device. For starting the machine, it is useful to provide a start-up phase during which the piston 2 and the slide 19 are positioned correctly relative to each other. This positioning can be achieved during a sequence of opening / closing of solenoid valves judiciously arranged in the circuit. This sequence fixed once and for all allowing, when the high pressure fluid is admitted, that the piston and the slide automatically place themselves in the starting position and this, whatever their previous positions.

Il doit être entendu que l'invention n'est nullement limitée aux formes de réalisation décrites et que bien des modifications peuvent être apportées à ces dernières sans sortir du cadre du présent brevet.It should be understood that the invention is in no way limited to the embodiments described and that many modifications can be made to these without departing from the scope of this patent.

En effet, on pourrait notamment prévoir, comme montré à la-figure 5, une distribution du fluide moteur dans les chambres 3 et 3' et l'échappement dudit fluide réalisés de manière beaucoup plus simple que celle illustrée à la figure 4. Ces distribution et échappement, pour lesquels on ne fait pas appel à un distributeur, mettant en oeuvre deux orifices d'admission 25 et deux orifices d'échappement 29 agencés dans l'élément 9 de' telle sorte que les orifices d'échappement 29, prévus au voisinage des extrémités de l'élément 9, et les orifices d'admission 25, ménagés entre les orifices 29, soient situés, deux à deux, à distances sensiblement égales desdites extrémités. Des tubulures 36 relient les orifices 25 à une source de fluide moteur sous pression tandis que les tubulures 37 relient les orifices 29 à la basse pression, des soupapes tarées 38 étant prévues dans ces tubulures 37 pour autoriser le passage du fluide moteur détendu des chambres 3 et 3' vers la basse pression et pour interdire ce passage lorsque la pression régnant dans les chambres 3 et 3' est supérieure à une basse pression déterminée. Deux rainures périphériques 39 sont ménagées dans le piston 2, ainsi que des canalisations 40 mettant chacune des rainures 39 en communication avec la chambre 3 ou 3° correspondante pour distribuer le fluide sous pression dans ces chambres. Les rainures 39 sont agencées de manière à venir alternativement en regard des orifices d'admission 25 avant la fin de course correspondante du piston 2 et lorsque la lumière 29 d'échappement correspondante est fermée par le piston. Il n'est toutefois pas indispensable que cette lumière 29 soit fermée par le piston, car l'échappement se ferme, grâce à la soupape 38, dès qu'il y a élévation de pression dans la chambre 3 ou 3'.Indeed, one could in particular provide, as shown in FIG. 5, a distribution of the working fluid in the chambers 3 and 3 ′ and the exhaust of said fluid produced in a much simpler manner than that illustrated in FIG. and exhaust, for which does not appeal to a distributor, using two intake ports 25 and two exhaust ports 29 arranged in the element 9 'so that the exhaust ports 29, provided at in the vicinity of the ends of the element 9, and the intake orifices 25, formed between the orifices 29, are located, two by two, at substantially equal distances the said ends. Tubes 36 connect the orifices 25 to a source of pressurized working fluid while the pipes 37 connect the orifices 29 to the low pressure, calibrated valves 38 being provided in these pipes 37 to allow the passage of the relaxed working fluid from the chambers 3 and 3 'towards the low pressure and to prevent this passage when the pressure prevailing in the chambers 3 and 3' is greater than a determined low pressure. Two peripheral grooves 39 are formed in the piston 2, as well as pipes 40 each putting grooves 39 in communication with the corresponding chamber 3 or 3 ° to distribute the fluid under pressure in these chambers. The grooves 39 are arranged so as to come alternately opposite the intake orifices 25 before the corresponding end of stroke of the piston 2 and when the corresponding exhaust port 29 is closed by the piston. However, it is not essential that this light 29 is closed by the piston, because the exhaust closes, thanks to the valve 38, as soon as there is a pressure increase in the chamber 3 or 3 '.

Claims (13)

1. Machine volumétrique, motrice et réceptrice, à mouvement alternatif, caractérisée en ce qu'elle comprend un cylindre et un piston libre à double effet monté dans ce cylindre, ce dernier et le piston étant agencés pour délimiter, à chacune des extrémités du cylindre, au moins deux chambres séparées l'une de l'autre, des moyens étant prévus pour l'aspiration et le refoulement alternatifs d'un fluide dans deux des chambres de la machine situées de part et d'autre du piston, ainsi que des moyens de distribution pour l'admission et l'échappement alternatifs d'un fluide moteur dans les deux autres chambres situées de part et d'autre du piston.1. Volumetric, driving and receiving machine, reciprocating, characterized in that it comprises a cylinder and a free double-acting piston mounted in this cylinder, the latter and the piston being arranged to delimit, at each of the ends of the cylinder , at least two chambers separated from each other, means being provided for the alternative suction and delivery of a fluid in two of the chambers of the machine located on either side of the piston, as well as distribution means for the alternative admission and exhaust of a working fluid in the two other chambers located on either side of the piston. 2. Machine volumétrique suivant la revendication 1, caractérisée en ce que le cylindre et le piston, considéré en position médiane, sont symétriques par rapport à un plan perpendiculaire à l'axe du cylindre et situé à distances égales des extrémités de celui-ci.2. Volumetric machine according to claim 1, characterized in that the cylinder and the piston, considered in the middle position, are symmetrical with respect to a plane perpendicular to the axis of the cylinder and located at equal distances from the ends thereof. 3. Machine volumétrique suivant l'une ou l'autre des revendications 1 et 2, caractérisée en ce que les chambres précitées et le cylindre sont coaxiaux.3. Volumetric machine according to either of claims 1 and 2, characterized in that the aforementioned chambers and the cylinder are coaxial. 4.-Machine volumétrique suivant la revendication 3, caractérisée en ce que le cylindre précité est constitué par un élément tubulaire obturé à chacune de ses extrémités par une culasse, une pièce, coaxiale à l'élément tubulaire, étant fixée à chacune des culasses de manière à s'étendre à l'intérieur de l'élément tubulaire, le piston présentant, à chacune de ses extrémités;un évidement, coaxial à l'élément tubulaire et de section correspondante à celle de la pièce avec laquelle il est destiné à coopérer pour former une des chambres susdites.4.-volumetric machine according to claim 3, characterized in that the aforementioned cylinder is constituted by a tubular element closed at each of its ends by a cylinder head, a part, coaxial with the tubular element, being fixed to each of the cylinder heads so as to extend inside the tubular element, the piston having, at each of its ends; a recess, coaxial with the tubular element and of section corresponding to that of the part with which it is intended to cooperate to form one of the above-mentioned chambers. 5. Machine volumétrique suivant la revendication 3, caractérisée en ce que le cylindre précité est constitué par un élément tubulaire obturé à chacune de ses extrémités par une culasse, chacune de ces culasses étant profilée de manière à présenter un évidement coaxial à l'élément tubulaire et s'étendant dans le prolongement de ce dernier, le piston présentant, à chacune de ses extrémités, une saillie coaxiale à l'élément tubulaire et de section correspondante à celle de l'évidement de la culasse avec lequel elle est destinée à coopérer pour former une des chambres susdites.5. Volumetric machine as claimed tion 3, characterized in that the aforementioned cylinder is constituted by a tubular element closed at each of its ends by a cylinder head, each of these cylinder heads being profiled so as to present a recess coaxial with the tubular element and extending in the extension of the latter, the piston having, at each of its ends, a projection coaxial with the tubular element and of section corresponding to that of the recess of the cylinder head with which it is intended to cooperate to form one of the abovementioned chambers. 6. Machine volumétrique suivant la revendication 4, caractérisée en ce que la pièce précitée présente un évidement coaxial à l'élément tubulaire tandis que le piston présente, dans son évidement précité correspondant à la pièce, une saillie coaxiale à l'élément tubulaire et de section correspondante à celle de l'évidement réalisé dans la pièce, ce dernier évidement et cette saillie délimitant une troisième chambre à l'extrémité considérée du cylindre, des moyens étant prévus pour l'aspiration et le refoulement alternatifs d'un fluide dans cette troisième chambre.6. volumetric machine according to claim 4, characterized in that the aforementioned part has a recess coaxial with the tubular element while the piston has, in its aforementioned recess corresponding to the part, a projection coaxial with the tubular element and section corresponding to that of the recess produced in the part, the latter recess and this projection delimiting a third chamber at the considered end of the cylinder, means being provided for the alternative suction and delivery of a fluid in this third bedroom. 7. Machine volumétrique suivant la revendication 5, caractérisée en ce que l'évidement susdit réalisé dans la culasse présente une saillie coaxiale à l'élément tubulaire tandis que la saillie du piston correspondante présente un évidement coaxial à l'élément tubulaire et de section correspondante à celle de la saillie réalisée dans l'évidement précité, cette dernière saillie et l'évidement réalisé dans la saillie du piston délimitant une troisième chambre à l'extrémité considérée du cylindre, des moyens étant prévus pour l'aspiration et le refoulement alternatifs d'un fluide dans cette troisième chambre.7. volumetric machine according to claim 5, characterized in that the aforesaid recess produced in the cylinder head has a projection coaxial with the tubular element while the projection of the corresponding piston has a recess coaxial with the tubular element and of corresponding section to that of the projection produced in the aforementioned recess, the latter projection and the recess produced in the projection of the piston delimiting a third chamber at the considered end of the cylinder, means being provided for the alternative suction and discharge d 'a fluid in this third chamber. 8. Machine volumétrique suivant l'une ou l'autre des revendications 6 et 7, caractérisée en ce que chacune des troisièmes chambres susdites est mise en communication avec la chambre correspondante délimitée par les saillie, et évidement précités.8. Volumetric machine according to either of claims 6 and 7, characterized in that each of the third above-mentioned chambers is placed in communication with the corresponding chamber delimited by the projections, and obviously mentioned above. 9. Machine volumétrique suivant l'une quelconque des revendications 1 à 8, caractérisée en ce que les moyens susdits prévus pour l'aspiration et le refoulement alternatifs du fluide précité sont constitués par des soupapes à pression différentielle.9. Volumetric machine according to any one of claims 1 to 8, characterized in that the aforementioned means provided for the alternating suction and delivery of the aforementioned fluid are constituted by differential pressure valves. 10. Machine volumétrique suivant l'une quelconque des revendications 1 à 9, caractérisée en ce que les moyens de distribution précités du fluide moteur comprennent un distributeur à tiroir et une commande pour déplacer le tiroir en synchronisme avec le piston susdit, le distributeur et les admissions et échappements des deux chambres de la machine dans lesquelles est introduit alternativement le fluide moteur étant agencés, d'une part, pour que l'admission d'une desdites chambres soit ouverte et mise en communication, via le distributeur, avec une source de fluide moteur, tandis que l'échappement de l'autre chambre est ouvert et mis en communication, via le distributeur, avec l'échappement du fluide moteur détendu et, d'autre part, pour que l'admission de la chambre dont l'échappement est ouvert soit fermée et pour que l'échappement de la chambre dont l'admission est ouverte soit fermé.10. Volumetric machine according to any one of claims 1 to 9, characterized in that the aforementioned means for distributing the working fluid comprise a spool valve and a control for moving the spool in synchronism with the said piston, the valve and the intakes and exhausts of the two chambers of the machine into which the motive fluid is introduced alternately being arranged, on the one hand, so that the intake of one of said chambers is open and placed in communication, via the distributor, with a source of working fluid, while the exhaust of the other chamber is open and put in communication, via the distributor, with the exhaust of the relaxed working fluid and, on the other hand, so that the admission of the chamber whose exhaust is open is closed and so that the exhaust of the chamber whose intake is open is closed. 11. Machine volumétrique suivant la revendication 10, caractérisée ne ce que le distributeur est. agencé pour communiquer avec les deux chambres précitées afin que son tiroir soit piloté par le fluide compris dans ces chambres, avec repos aux deux positions du tiroir.11. Volumetric machine according to claim 10, characterized in that the distributor is. arranged to communicate with the two aforementioned chambers so that its drawer is controlled by the fluid included in these chambers, with rest at the two positions of the drawer. 12. Machine volumétrique suivant l'une quelconque des revendications 1 à 9, caractérisée en ce que les moyens de distribution précités du fluide moteur dans les chambres précitées comprennent deux orifices d'admission et deux orifices d'échappement agencés dans le cylindre de telle sorte que les orifices d'échappement, prévus au voisinage des extrémités du cylindre, et les orifices d'admission, ménagés entre les orifices d'échappement, soient situés, deux à deux, à distances égales desdites extrémités, des tubulures reliant les orifices d'admission à une source de fluide moteur sous pression tandis que des tubulures relient les orifices d'échappement à la basse pression , des soupapes tarées étant prévues dans ces dernières tubulures pour autoriser le passage du fluide détendu des chambres vers la basse pression et pour interdire ce passage lorsque la pression régnant dans les chambres est supérieure à une basse pression déterminée, deux rainures périphériques étant ménagées dans le piston ainsi que des canalisations mettant chacune de ces rainures en communication avec la chambre correspondante pour distribuer le fluide sous pression dans lesdites chambres, ces rainures étant agencées de telle sorte.qu'elles viennent alternativement en regard des orifices d'admission avant la fin de course du piston correspondante et lorsque l'échappement correspondant est fermé.12. volumetric machine according to any one of claims 1 to 9, characterized in that the aforementioned means for distributing the working fluid in the aforementioned chambers comprise two intake ports and two exhaust ports arranged in the cylinder so that the exhaust ports, provided in the vicinity of the ends of the cylinder, and the intake ports, formed between the exhaust ports, are located, two by two, at equal distances from said ends, of the pipes connecting the admission to a source of pressurized working fluid while pipes connect the exhaust orifices to the low pressure, calibrated valves being provided in these latter pipes to allow the passage of the expanded fluid from the chambers to the low pressure and to prevent this passage when the pressure in the chambers is greater than a determined low pressure, two peripheral grooves being formed in the pi ston as well as pipes putting each of these grooves in communication with the corresponding chamber to distribute the pressurized fluid in said chambers, these grooves being arranged so that they come alternately opposite the intake orifices before the end of corresponding piston stroke and when the corresponding exhaust is closed. 13. Machine volumétrique suivant l'une quelconque des revendications 1 à 12, caractérisée en ce qu'elle comprend , associés au piston, des moyens agencés pour transformer, par exemple en énergie électrique, l'énergie communiquée au piston par le fluide moteur.13. Volumetric machine according to any one of claims 1 to 12, characterized in that it comprises, associated with the piston, means arranged to transform, for example into electrical energy, the energy communicated to the piston by the working fluid.
EP80201201A 1979-12-27 1980-12-13 Reciprocating positive displacement machine Expired EP0031617B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80201201T ATE13926T1 (en) 1979-12-27 1980-12-13 RECIPROCATING DISPLACEMENT MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE0/198776A BE880897A (en) 1979-12-27 1979-12-27 VOLUMETRIC MOTOR AND RECEPTOR MACHINE WITH RECIPROCATING MOTION
BE198776 1979-12-27

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EP0031617A1 true EP0031617A1 (en) 1981-07-08
EP0031617B1 EP0031617B1 (en) 1985-06-19

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Cited By (2)

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EP0142362A1 (en) * 1983-11-11 1985-05-22 Cosworth Engineering Limited Apparatus for and a method of transferring liquid
WO1989008188A1 (en) * 1988-03-03 1989-09-08 James Roderic Robertson Linear reciprocating compressor

Citations (1)

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Publication number Priority date Publication date Assignee Title
FR1240116A (en) * 1959-07-24 1960-09-02 Faucheux Ets Hydraulic control device for reciprocating motion actuated by a cylinder

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GB796226A (en) * 1954-07-26 1958-06-11 American Mach & Foundry Internal combustion free-piston engine
DE1098285B (en) * 1958-03-28 1961-01-26 Daimler Benz Ag Device for cooling the working pistons of free-flying piston compressors
FR1309350A (en) * 1961-10-03 1962-11-16 Electromechanical energy transformation device
DE1528583A1 (en) * 1965-05-20 1970-01-29 Stahl U Appbau Hans Leffer Gmb Hydraulically or pneumatically continuously operated piston drive with reciprocating movement, especially double-acting pressure intensifier
US4029440A (en) * 1975-08-21 1977-06-14 Flow Industries, Inc. High pressure fluid intensifier and method
ES468200A2 (en) * 1976-02-11 1978-12-16 Mallofre Salvador Gali Improvements in pneumatic installations. (Machine-translation by Google Translate, not legally binding)

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Publication number Priority date Publication date Assignee Title
FR1240116A (en) * 1959-07-24 1960-09-02 Faucheux Ets Hydraulic control device for reciprocating motion actuated by a cylinder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142362A1 (en) * 1983-11-11 1985-05-22 Cosworth Engineering Limited Apparatus for and a method of transferring liquid
WO1985002225A1 (en) * 1983-11-11 1985-05-23 Cosworth Engineering Limited Apparatus for and a method of transferring liquid
GB2158889A (en) * 1983-11-11 1985-11-20 Cosworth Eng Apparatus for and a method of transferring liquid
WO1989008188A1 (en) * 1988-03-03 1989-09-08 James Roderic Robertson Linear reciprocating compressor

Also Published As

Publication number Publication date
ATE13926T1 (en) 1985-07-15
DE3070791D1 (en) 1985-07-25
EP0031617B1 (en) 1985-06-19
JPS5698616A (en) 1981-08-08

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