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WO1983000527A1 - Machine volumetrique, en particulier machine a piston rotatif annulaire - Google Patents

Machine volumetrique, en particulier machine a piston rotatif annulaire Download PDF

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Publication number
WO1983000527A1
WO1983000527A1 PCT/DE1982/000160 DE8200160W WO8300527A1 WO 1983000527 A1 WO1983000527 A1 WO 1983000527A1 DE 8200160 W DE8200160 W DE 8200160W WO 8300527 A1 WO8300527 A1 WO 8300527A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
walls
annular
radial
working space
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.)
Ceased
Application number
PCT/DE1982/000160
Other languages
German (de)
English (en)
Inventor
Spandau Kg Geco-Pumpentechnik ... Maschinenfabrik
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
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO1983000527A1 publication Critical patent/WO1983000527A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/02—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F01C1/04—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents of internal-axis type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F01C1/36—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movements defined in sub-groups F01C1/22 and F01C1/24
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C5/00—Rotary-piston machines or engines with the working-chamber walls at least partly resiliently deformable

Definitions

  • Displacement machine in particular ring piston machine
  • the invention relates to an axially parallel displacement machine in an annular piston type according to the preamble of patent claim 1.
  • a number of known displacement machines of a similar design e.g. the rotary slide valve system has the disadvantage that the conveying elements are not positively controlled and that the centrifugal forces cannot be compensated for in a simple manner.
  • the aim of the invention is to eliminate the disadvantages mentioned above.
  • the object of the invention is to use a simple element, an annular piston, to produce a number of displacement machines with positively controlled conveying elements for several work spaces, such as pumps, compressors, flow meters, pneumatic motors, hydraulic motors or gears, and pressure increase - plants etc.
  • the object is achieved by the features reproduced in the characterizing part of patent claim 1.
  • the inventive basic idea of using an annular piston instead of a cylindrical piston has an effect on several known principles, such as rotary slide valve and roller piston principle. Radially on both sides of the annular piston separate work rooms, which means that the machines can be designed in several stages; but also brings other advantages.
  • the piston can rotate, roll or rest, whereby it can be driven by a shaft, an eccentric or directly by a force field. The same applies to the radial walls of the work area. So a wave is not always necessary.
  • the inlet and outlet ducts are located in the relevant ones . rush.
  • the first improvement relates to the known rotary slide system.
  • the ring-shaped piston rotates between two initially cylindrical radial working space walls that run eccentrically to the piston.
  • the slots for the conveying elements are milled radially through the ring-shaped piston, and the piston is held together axially outside the working spaces by 1 or 2 side parts (Claim 2).
  • Slides or cylindrical rollers, or combinations between the two, which are now positively controlled between the two equidistant working space walls, are located in the slots as conveying elements.
  • the two radial walls of the working space can be designed to generate any stroke, i.e. they can have several rounded "corners".
  • the eccentric cylindrical shape corresponds to the "one-corner”, the elliptical shape to the "two-corner”, followed by the "triangle”, "square” sw.
  • the diameter of the cylindrical rollers is equal to the vertical distance of the working space walls.
  • the slides can be thought of as being cut out from a corresponding roll, since they must have the same radial extension and the same crowning at the ends. In addition, they must have a certain minimum thickness here, since the sealing line migrates somewhat at the ends.
  • cylindrical walls of the work space can be used to adjust the stroke in a known manner, on the other hand they can also rotate. Since this axis coincides with the axis of rotation of the conveyor elements, the inner work space wall can be used to suspend the conveyor elements so that the centrifugal forces are compensated for by a corresponding radial force.
  • the conveying elements are either connected to a clamping ring or to the inner work space wall in a somewhat displaceable manner in the circumferential direction. (Claim 3)
  • the conveyor elements can also be hung on ropes or spokes that penetrate the inner work space wall and are brought together in the axis of rotation of the conveyor elements, at least in this direction (claim 11).
  • a magnet can be arranged on the inside, which then inwardly pulls the ferromagnetic conveying elements only (claim 12).
  • Several magnetic poles can also drive the
  • Conveyor elements are used.
  • the number of conveying elements is of course arbitrary.
  • the two radial walls of the working space are circular-cylindrical and the piston rotates about its axis of symmetry, which in most cases is also its central axis.
  • the stroke-generating surfaces are here on the piston, i.e. it is eccentrically cylindrical ("one-corner"), elliptical ("two-corner”), triangular, square, etc., that is to say polygonal with rounded corners.
  • Parts of the stroke-generating lateral surfaces run continuously along the cylindrical walls of the work area.
  • a subsidy arises again through an additional non-circular separation point on the circumference, the one by a radially movable partition for the piston passage (claim 9) or slide, on the other hand by the same stroke generating locking piston (claim 10) is formed.
  • the locking pistons are positively controlled (e.g. by gears) and rotate at a certain speed ratio to
  • OMPI IPO ri-ng-like pistons are much smaller than this and shaped so that their lateral surfaces constantly run past each other.
  • the piston and the work space walls are usually circular cylindrical, but could also be jointly elliptical or shaped differently.
  • the two lateral surfaces of the piston bear against a circumferential point on the respective work space wall.
  • the rolling movement can be carried out by either the piston or the working space walls, which, because they are constructed here in exactly the same way as the piston, simultaneously form a new piston, which creates even more independent working spaces.
  • a non-circular separating point is again at a point on the circumference.
  • the annular piston is either forced to roll off directly by a rotating magnetic field, or at least connected to a side part which is driven by an eccentric shaft.
  • a particularly elegant and simple, hermetically sealed pump is created here by the use of elastic working space walls (claim 5).
  • the elastic walls of the working space are firmly connected with their axial ends to the piston, thereby hermetically sealing off the working spaces. At the other end, they remain firmly connected to the rigid walls of the work area.
  • the latter can also be omitted entirely when the piston is at rest and the wire-reinforced elasto-metal itself is moved by an eccentrically mounted side part (claim 6).
  • the stationary separating point on the circumference can be carried out in a simple manner in such a way that the elastic working space walls are completely connected to the piston at this point or the piston has an interruption point r at which the hose feeds lie , which also form the required separation point.
  • the piston is normally rectangular in cross section, but can also take any other cross-sectional shape, only the distance between its circumferential surfaces must be circumferential. remain constant. According to claim 7, a bollard-like cross-section is provided, which takes the elastobalg better into account, particularly in claim 6.
  • the "eccentric ring pump” described last can also pump abrasive media, is hermetically sealed like a peristaltic pump, but is much smaller and can be easily carried out in two stages. However, it is also superior to the eccentric screw pump, because the extremely low flexing work of the elastomer means that the pump can run dry longer and delivers larger quantities at greater delivery heights in the case of steel wire inserts.
  • FIG. 1a shows a ring piston machine in a cross section
  • 3a shows a ring piston machine in a cross section
  • 3b shows the associated longitudinal section
  • FIG. 4a shows an annular piston machine in a cross section
  • 6 shows a ring piston machine in a cross section
  • 7a shows an annular piston machine in a cross section
  • OMPI 11a shows an annular piston machine in a cross section
  • 11b shows the associated longitudinal section
  • Fig. 12 is an annular piston machine in a cross section.
  • Fig. 1a a cross section of an annular piston machine along the line A-A of Fig. 1b and in Fig. 1b a longitudinal section along the line BB in Fig. 1a is shown.
  • the ring-shaped piston 1 is exactly circular, but is rotatably mounted eccentrically between the likewise ring-shaped work space walls 3 and 4.
  • the central axes of the piston and the radial walls of the working space are here simultaneously the axes of symmetry (rotational symmetry), run parallel, but do not coincide.
  • the piston 1 is rigidly attached to a disc-shaped side part 5, which at the same time forms a lateral, flat working space wall and is connected to the shaft 8.
  • cylindrical rollers 13 are arranged here as conveyor elements 12, the diameter of which is equal to the vertical, that is to say the shortest, distance between the radial working space walls 3 and 4 . Since the piston 1 passes through a stroke-generating path due to a certain eccentricity of its axis of rotation with respect to the work space walls 3 and 4, a total of 2 separate conveying possibilities with several closed work spaces arise between the piston and the respective radial work space wall Inlet and outlet channels 6 are located in the lateral part of the housing 7. The radial walls 3 and 4 of the working space can be radially displaced by the lever 19. By means of this "stroke adjustment", the delivery rate per revolution can be regulated.
  • the full delivery rate is achieved when the piston 1 with its two lateral surfaces simultaneously the two radial walls of the working space touched, whereby a fixed separation point 15 is still ent.
  • the pump then only has the small harmful volume which arises from the fact that the cylindrical rollers 13 do not completely fill the slots 11. Even without this separation point 15, which is present in other examples, there is no short circuit between the inlet and outlet channels, since their distance.
  • the circumference is greater than the distance between the cylindrical rollers 13. Since the cylindrical rollers 13 are positively controlled here, they can be fitted closely between the radial and axial walls of the work space and may roll if a radial wall of the work space can rotate, which is the case here at least in the outer is possible. Incidentally, the whole pump can be imagined from a cylindrical roller bearing.
  • Fig. 1a There is also the possibility here, for example of oil-free machines, of further reducing the friction on the conveying elements 12 caused by the centrifugal force (cylindrical rollers do not always have to be pure).
  • the conveying elements 12 can be attached to the inner wall of the working space 3, which is also rotating, by means of a suspension 20, and secondly, the centrifugal force can be compensated for by magnetic forces.
  • permanent magnets are arranged in the inner work area wall 3. These magnets 21 pull the iron-containing or also magnetic conveyor elements 12 inwards. Electromagnets can of course also be used. If the inner working space wall 3 is driven, the torque can also be transmitted to the conveying elements 12 in this way. If you also leave a thin wall made of non-magnetic material, it is a hermetically sealed machine that has two stages right from the start.
  • the housing 7 can be made of plastic so as not to disturb the magnetic flux.
  • the number of conveying elements is of course in
  • 3a and b show the same annular piston machine as in the two previous examples, only that here the piston 1 is rigidly attached on both sides to side parts 5 which simultaneously form the side work space walls.
  • the conveying elements 12 can be thought of as being cut out of cylinders, but the diameter was larger than the distance between the radial work space walls, the radial sides being turned so that they fit between the radial work space walls.
  • Yet another variant (all of the aforementioned can of course also be used here) for compensating the centrifugal force so that the conveying elements 12 can run along the outer wall 4 of the working space without contact.
  • the conveying elements 12 are fastened here to tethers 24 or spokes or the like, which in turn are fastened to one another in the center in the axis of symmetry of the working space walls 3 and 4.
  • the inner work space wall 3 is drilled through for this purpose and rotates with it.
  • the length of a rope or a spoke corresponds to the radius of the inner work space wall 3. If there are several conveying elements, the connection point of the ropes automatically remains in the axis of symmetry; if there are only two conveying elements, a bracket must be provided for this. Since the grinding movement on the outer circumference is absent here, these machines also become quieter than conventional rotary vane compressors and can also run oil-free.
  • This construction is also suitable as a compressed air motor, whereby instead of the conveying elements 12 slides or rollers can also be used.
  • the shaft 8 is interrupted in the middle and on the. Side parts 5 attached.
  • FIG. 4a and b show the same rotary piston machine as in the first exemplary embodiment, but here the radial working space walls 3 and 4 have been made elliptical, whereby 2 stroke-generating sections (“triangle”) are created and a total of 4 separate working spaces 2, ie Funding opportunities.
  • this embodiment is particularly suitable as a hydraulic motor, since the resulting bearing forces of two opposing, interconnected work spaces cancel each other out.
  • the piston is axially relieved hydrostatically; laterally, as in the two following exemplary embodiments, the piston can also be designed as in the 2nd or 3rd example.
  • the delivery rate per revolution cannot be regulated here, and only the outer working spaces 2 are used. (To ensure that there is no excessive pressure in the inner workrooms, the workroom walls have compensation grooves there.)
  • FIG. 5 shows a cross section of the same ring piston machine, only that here the working space walls 3 and 4 are triangular in shape with rounded corners.
  • the inner, ie a total of 6 work spaces 2 are also used.
  • FIG. 6 shows an annular piston machine analogous to the previous exemplary embodiment, with the work space walls 3 and 4 here being designed in a square shape and slides 14 being used instead of the cylindrical rollers.
  • the exactly circular piston 11 fits exactly between the
  • the ring piston machine in FIGS. 7a and b has an elliptical ring-shaped piston 1. Because of its two lifting sections, it constitutes a "triangle".
  • the radial working space walls 3 and 4 are exactly circular-cylindrical. Its axis of symmetry 10 is simultaneously the central axis 9 of the piston 1 and its axis of rotation.
  • the piston is again with a side part 5, and this is connected to the shaft 8.
  • a stationary separating point 15 is created by a flat slide 14 which is mounted in the housing 7 so as to be radially movable. It has a slot 11 for the piston passage and is forced through it. controls.
  • the channels 6 are again outside and inside in the stationary housing 7. This embodiment is particularly suitable as a slow-running pump for viscous masses or as a flow meter or the like
  • the two fixed separating points 15 are formed by two locking pistons 23, which likewise rotate at the same speed about their central axes and thus simultaneously about their centers of gravity.
  • the locking pistons are much smaller than the piston 1 and also elliptically shaped such that their lateral surfaces continuously run along the two lateral surfaces of the piston 1 and run along another cylindrical line along a cylindrical recess in the housing 7. In doing so, they also contribute to the promotion. Since it is a pure rotary piston machine, it is suitable for high-speed or large machines for air compression, as an exhaust gas turbocharger or the like.
  • displacement is forced by a rolling movement.
  • 9a and b show a cross and longitudinal section of an annular piston machine designed as an "eccentric ring pump”.
  • Piston 1 and radial working space walls 3 and 4 are circular cylindrical.
  • the piston is eccentric to the radial working space walls, i.e. its axis of symmetry 9 makes about the axis of symmetry of the working space
  • OMPI Walls 10 a circular movement.
  • the fixed separation point 15 on the circumference is formed by a fixed, radial wall, where the piston has a radial slot 11.
  • the four channels 6 are located on both sides of this wall. It is a hermetically sealed pump which also does not require a drive shaft.
  • the piston 1 is forced to roll directly by a rotating magnetic field.
  • 3 electromagnets 21 are drawn, which are excited by three-phase current.
  • the housing 7 made of plastic and the piston 1 made of iron.
  • a work space 2 is created between the work space wall 4 and the outer part of the housing 7.
  • the side part to which the stationary piston 1 is attached belongs here to the housing 7. If the work space walls are provided with an elastic layer, this is the pump also insensitive to abrasive media.
  • FIG. 11a and b show a cross or longitudinal section of an annular piston machine as a hermetically sealed eccentric ring pump with elastic working space walls 22.
  • the cylindrical, annular piston 1 is again fastened to a side part 5, which is forced to roll by shaft 8 and eccentric 17.
  • the elastic working space wall 22 passes from the fixed housing 7 to the moving piston 1. It is tightly attached to the housing at the serrated points on one axial side and on the piston at the other end.
  • the piston 1 is interrupted at one point on the circumference.
  • the elastic working space wall 22 is closed to form a hose and leads radially outwards. At the same time, it forms the channels 6 and the fixed separation point 15.
  • the two work rooms 2 are interconnected here in the same way.
  • the flexing work of the elastomer is similar to that of a car tire. This pump can also run dry. If, like a car tire, the elastic material is reinforced with fabric and steel wire, large delivery heights can also be achieved with large delivery volumes; but it could also consist of pure tissue. If the inlet is led out axially on the side and the edges are made hard, the solids are crushed there because the piston then slides over the inlet edges like a knife. So that the piston does not load the elastic working space wall in the circumferential direction, the side part 5 is secured at one point against rotation.
  • the annular piston 1 is rectangular in cross section, but could also be designed like a poler in cross section.
  • OH Receives workrooms 2 and is designed to be polish-like in cross section so that the contact pressure of the elastic workspace wall 22 becomes as uniform as possible.
  • the stroke-shaped rolling movement here is made by the elastic walls of the working space, which are attached to the eccentrically mounted side part 5 on one end face with the serrated points, which in turn is driven by shaft 8 with eccentric 17.
  • the elastic working space wall 22 is completely connected to the piston 1 as a partition between the channels, but not on the side part 5.
  • All of the exemplary embodiments can easily be classified as two or multi-stage. Machines are running. Since most can also work both as a pump and as a hydraulic or compressed gas motor, such a displacement machine can also drive itself, and e.g. so serve as pressure booster systems.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

La machine volumétrique utilisée comme pompe, compresseur ou analogue est en principe assimilée aux machines à tiroir rotatif et à palettes, sauf en ce qui concerne le piston cylindrique qui est remplacé par un piston annulaire (1) disposé dans une chambre annulaire délimitée par des parois intérieures (3) et extérieures (4), qui divisent cette chambre annulaire en deux chambres de travail (2) et qui tournent, roulent ou sont au repos, lorsque les parois radiales de la chambre de travail sont en mouvement. Un piston cylindrique circulaire peut se mouvoir entre les parois radiales de la chambre de travail, qui engendrent le volume de travail, qui peuvent former un monoangle, un biangle ou un triangle, mais qui ont toujours la même distance radiale la plus courte. Ainsi, les éléments moteurs (12) (tiroirs (14) ou rouleaux cylindriques (13)) disposés dans des évidements radiaux (11) du piston (1), ont un mouvement obligatoire. Le piston est fixé à au moins un organe latéral (5). En annulant les forces centrifuges, cette machine se comporte comme une machine à piston rotatif. De chaque côté du piston est agencée une chambre de travail, créant ainsi une machine à deux étages, ce qui permet de ne pas toujours les exploiter obligatoirement; le mouvement obligatoire et l'annulation des forces centrifuges sont avantageux en soi. Inversément, un piston (monoangle, biangle, triangle...) qui engendre le volume de travail, peut tourner entre des parois cylindriques circulaires. Une pompe à anneaux excentriques est caractérisée par un piston annulaire qui roule simultanément sur les deux parois annulaires. Une paroi élastique peut être disposée entre le piston et le carter créant une pompe hermétiquement fermée qui résiste aux agents abrasifs. Le piston en forme de fer à cheval peut être stationnaire et les parois élastiques peuvent être entraînées par un excentrique.
PCT/DE1982/000160 1981-08-03 1982-08-02 Machine volumetrique, en particulier machine a piston rotatif annulaire Ceased WO1983000527A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3130670.5810803 1981-08-03
DE19813130670 DE3130670A1 (de) 1981-08-03 1981-08-03 Verdraengermaschine, insbesondere ringkolbenmaschine

Publications (1)

Publication Number Publication Date
WO1983000527A1 true WO1983000527A1 (fr) 1983-02-17

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PCT/DE1982/000160 Ceased WO1983000527A1 (fr) 1981-08-03 1982-08-02 Machine volumetrique, en particulier machine a piston rotatif annulaire

Country Status (4)

Country Link
EP (1) EP0085689A1 (fr)
DE (1) DE3130670A1 (fr)
IT (1) IT1152306B (fr)
WO (1) WO1983000527A1 (fr)

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US4728272A (en) * 1984-12-21 1988-03-01 Knud Simonsen Rotary fluid displacement machine with revolving working chambers of periodically varying volume
GB2258013A (en) * 1991-07-18 1993-01-27 James Macmahon Rotary piston internal combustion engine.

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IT1305748B1 (it) * 1996-11-22 2001-05-16 Col Enzo De Categoria di macchine a pistoni rotanti.
RU2230230C1 (ru) * 2002-11-19 2004-06-10 Астановский Дмитрий Львович Насос астановского (варианты)
US7285829B2 (en) * 2004-03-31 2007-10-23 Intel Corporation Semiconductor device having a laterally modulated gate workfunction and method of fabrication
RU2330991C2 (ru) * 2005-09-12 2008-08-10 Евгений Рафаилович Савинов Насос эксцентриковый
RU2333391C2 (ru) * 2006-03-17 2008-09-10 Шлюмбергер Текнолоджи Б.В. Роторный насос
US8079343B2 (en) * 2007-09-17 2011-12-20 John Howard Seagrave Positive-displacement turbine engine

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DE532971C (de) * 1927-05-11 1931-09-05 Vacuum Compressor Ab Drehkolbenmaschine mit in einem ringfoermigen Arbeitsraum exzenterfoermig bewegtem, zwecks Abdichtung radial verschiebbarem Ringkolben
GB309141A (en) * 1928-04-05 1930-08-05 Rene Lahaussois Improvements in or relating to rotary engines, pumps or the like
US1974761A (en) * 1931-05-18 1934-09-25 Floyd F Vogel Internal combustion rotary engine
US1967957A (en) * 1933-05-01 1934-07-24 Nat Electrical Supply Company Vacuum pump
FR1015679A (fr) * 1950-03-01 1952-10-17 Machine à volumes variables permettant d'échanger de l'énergie avec un fluide
AT210233B (de) * 1958-07-16 1960-07-25 Arno Fischer Als Motor, Pumpe, Kupplung od. dgl. verwendbare Maschine
US3167022A (en) * 1963-07-18 1965-01-26 Scognamillo Frank Rotary machine with blade centering rings
US3190227A (en) * 1964-09-04 1965-06-22 Marquardt Corp Fluid device
FR2022678A1 (fr) * 1968-11-06 1970-08-07 Wittig Karl Maschinenf
AU3183471A (en) * 1971-07-30 1973-02-01 Joseph Lucas (Industries) Limited Rotary fluid displacement machines
DE2262131A1 (de) * 1972-12-19 1974-06-20 Eugen Dr Med Ferrari Explosionsrotations-motor
FR2343141A1 (fr) * 1976-03-05 1977-09-30 Sulzer Ag Machine volumetrique rotative utilisable en tant que pompe, frein ou moteur
DE2708277A1 (de) * 1977-02-25 1978-08-31 Nikkiso Eiko Kk Verdraengungspumpe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4728272A (en) * 1984-12-21 1988-03-01 Knud Simonsen Rotary fluid displacement machine with revolving working chambers of periodically varying volume
GB2258013A (en) * 1991-07-18 1993-01-27 James Macmahon Rotary piston internal combustion engine.
GB2258013B (en) * 1991-07-18 1994-12-14 James Macmahon Rotary piston internal combustion engine

Also Published As

Publication number Publication date
IT8222702A1 (it) 1984-02-02
IT1152306B (it) 1986-12-31
DE3130670A1 (de) 1983-02-17
IT8222702A0 (it) 1982-08-02
EP0085689A1 (fr) 1983-08-17

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