EP0561855A1 - Drehkolbenmaschine. - Google Patents
Drehkolbenmaschine.Info
- Publication number
- EP0561855A1 EP0561855A1 EP92900081A EP92900081A EP0561855A1 EP 0561855 A1 EP0561855 A1 EP 0561855A1 EP 92900081 A EP92900081 A EP 92900081A EP 92900081 A EP92900081 A EP 92900081A EP 0561855 A1 EP0561855 A1 EP 0561855A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam
- piston machine
- rotary piston
- machine according
- rolling elements
- 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
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 91
- 230000005540 biological transmission Effects 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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
- F01C1/02—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
- F01C1/063—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 with coaxially-mounted members having continuously-changing circumferential spacing between them
- F01C1/067—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 with coaxially-mounted members having continuously-changing circumferential spacing between them having cam-and-follower type drive
Definitions
- the invention relates to a rotary lobe machine with a housing, with a shaft mounted in the housing, with an annular space in which two rotating bodies are arranged and on the walls, in which inlet and outlet openings are provided for the working medium, the rotating bodies bear tightly, each Rotating body has radially outwardly extending sector-shaped wings, the two rotating bodies are arranged coaxially and their wings engage in such a way that one wing of one rotating body is arranged between two wings of the other rotating body, with a cam track control It is provided, by means of which, when the shaft rotates, the two rotating bodies perform rotations with cyclical changes in the rotational speed and the distances between the vanes of the two rotating bodies, and the cam track control means first cam track control means in the form of first cam rings, second cam track Control means in the form of second cam rings and third cam control means in the form of a cage with rolling elements which are held immovably in the circumferential direction and taper conically towards both end faces and which roll on the first and second cam rings, one
- the cam track control of the rotating bodies is carried out with two sets of elements, each of which has an inner cam ring, rolling bodies and an outer cam ring.
- Two such sets of controls are required since the rolling elements can only be pressed outward from the inner cam ring over a certain angular range (for example 45 °) and then these rolling elements in turn turn the outer cam ring by the force directed outwards so that a Torque can be transferred from the inner cam ring to the outer cam ring. Then the rolling elements must be moved inwards again; no torque can be transferred from the inner cam ring to the outer cam ring during this time.
- a second set of such a cam path control must therefore be provided, which effects the torque transmission in this rotation angle range.
- torques are to be transmitted from the outer cam ring to the inner cam ring.
- the large number of elements of the cam track control makes the structure relatively complex and that increased frictional losses can also occur.
- the cam rings have a relatively complicated shape, so that 'their preparation is complex and expensive.
- the object of the invention is to provide a rotary piston machine of the type mentioned, which is of simpler construction.
- the solution according to the invention is that the rolling elements are provided with bevel gear teeth, that the surfaces of the cam tracks of the cam rings facing the rolling elements are arranged in a rotationally symmetrical surface corresponding to the surface of the rolling elements and are provided with corresponding internal bevel gear teeth, and that at most one cam track control with a first and second outer cam ring and rolling elements is provided for each rotating body.
- the rolling elements no longer transmit the torque from the first to the second cam ring or vice versa by moving outwards or inwards. Rather, they maintain their radial position at least essentially and transmit the torques by rotation with the help of the toothings.
- the rolling elements roll on the relatively narrow cam tracks which protrude from the surfaces of the cam rings facing the rolling elements. These surfaces lie in surfaces which have essentially the same double cone shape as the rolling elements and which are also provided with toothing. Such essentially conical surfaces can be produced much more easily than the complicated curve shapes of the previously known rotary piston machine.
- the surfaces of the cam rings facing the rolling elements as a whole can also be rotationally symmetrical or double-conical except for the above cam tracks, which also makes them easier to manufacture.
- the toothings are involute toothings, the involute geometry of which is perpendicular to the axis of the rolling element.
- involute toothing The advantages of involute toothing are known to the person skilled in the art. If the involute geometry is perpendicular to the axis of the rolling element and not, as is usually the case with bevel gearwheels, perpendicular to the surface of the cone, then besides the center line of the cam track there is a profile shift in which the gearwheels are still in one another without play intervention. So you have a zero gear on the center line and V-zero gear on both sides (Decker, "Machine elements, design and calculation", Carl Hanser Verlag Kunststoff 1963, pp. 370-373).
- the pressure angle is 20 ° according to DIN 867. If it is provided that the pressure angle is approximately 30 to 50 °, in particular approximately 35 to 40 °, not only the torques can be transmitted as desired by the cam rings and the rolling elements, but also radial forces can be absorbed.
- the cam track controls can therefore serve as additional bearings. Under certain circumstances, it will even be possible to dispense entirely with other bearings, which further simplifies the construction of the rotary piston machine.
- cam rings are constructed from two halves arranged axially one behind the other, they are easier to manufacture. In addition, the cam track control can be put together more easily. If the cam rings are clamped together axially, which can be done by clamping and / or using appropriate springs, radial forces could act on the bearings of the rolling elements, e.g. if the inner cam rings exert a greater radial force than the outer cam rings. It is therefore expediently provided that the rolling elements, which cannot move in the circumferential direction, are held in bearings which are displaceable at least by a certain amount in the radial direction. In this case, the rolling elements can avoid the uneven forces.
- the axes of the rolling elements in the bearings are expediently subjected to an elastic force in the direction of the axis of rotation. If no torques act, the axes assume the position adjacent to the axis of rotation without play. If the torque increases, the axes in the bearings can move outwards to a new limit position give in. In this way, the required backlash is achieved with a precisely defined maximum game.
- the rotary bodies do not perform a net rotational movement against one another.
- the number of teeth of the inner and outer cam ring is the same and is divisible by the number of wings.
- Each cam track control advantageously has the same number of rolling elements as the number of vanes per rotating body.
- the invention is not limited to the cases in which inner and outer cam rings are present, as is the case with the prior art (EP-B1-0 316 346).
- the cam rings are connected to the shaft in a rotationally fixed manner and the second cam rings are connected in a rotationally fixed manner and the cage is connected to the housing. Dabe.
- the first cam rings can be arranged radially on the inside of the rolling elements and the second cam rings enclose the first cam rings and the rolling elements.
- the second cam rings are arranged radially on the inside of the rolling elements and the first cam rings are second and enclose the rolling elements.
- the second cam rings have a smaller mass and a smaller moment of inertia, so that the mass to be accelerated and braked again and again is reduced.
- first and second cam rings are arranged next to one another radially on the inside of the rolling elements. In this case too, the forces or torques can be transmitted effectively due to the toothing, which would not be possible without toothing in this embodiment.
- the rolling elements can be enclosed by a massive third cam ring which (except for the guidance through the toothing) can be freely rotated and can be decelerated or accelerated exactly in the opposite direction to the accelerating and decelerating movements of the rotating elements, in order to achieve a more even running to ensure.
- the torque can first be transmitted from the first cam ring to the first part of the rolling element and from there to the massive third cam ring. From the latter, the torque is then transmitted further via the second part of the rolling element to the second cam ring and from there to the rotating element. In this case you get a larger number of translation stages.
- first and second cam rings enclose the rolling elements; Both cam rings, which are arranged next to each other, work together with the rolling elements from the outside.
- first cam rings are connected to the housing, the second cam rings are connected to a rotating body and the cage is connected to the shaft.
- the torque is not transmitted from the shaft to the first cam rings, but to the cage that carries the rolling elements.
- gears and cam tracks are designed so that a maximum angular velocity of one rotating body corresponds to a minimum angular velocity of the other rotating body, that the angular velocity maxima and minima are arranged at intervals of half the cycle time , have the same values in the middle between two extreme values, and that in the area of the maxima the change over time is a flattened function.
- 1 shows a section through a radial plane of the annular space of a rotary piston machine of the invention with the two rotating bodies. 2 shows the two rotating bodies in different positions;
- Figure 4 shows the cam track on the surface of the inner cam ring.
- FIG. 5 shows in section a somewhat modified embodiment of the rotary piston machine of FIG. 1;
- Fig. 8 is a cross section along the line VIII-VIII of Fig. 7;
- Fig. 11 shows yet another embodiment in cross section
- FIG. 13 shows a cam ring with the modified toothing or cam track of FIG. 12.
- Fig. 14 • a graphical representation of the temporal change in the angular velocity of the cam rings.
- annular space 1 shows the annular space 1 of a rotary piston machine of the invention, which is enclosed by parts of the housing 2.
- the impeller 3 has the vanes 3a, 3b, 3c and 3d
- the impeller 4 has the vanes 4a, 4b, 4c and 4d. Both impellers are driven by a shaft 5 arranged in the center in a manner still to be described. With 6a-h different inlet openings and outlet openings in the end wall of the annular space 1 are designated.
- the wing 3d begins to move faster than the wing 4a, so that the working space between the two wings is reduced and the gas is compressed until both wings have moved so far that the working space has reached the outlet opening 6b , so that the gas can escape here.
- the wing 3d can be brought up to the wing 4a, so that the gas is pushed out completely here.
- This mode of operation can be used both for a compressor and for an internal combustion engine. Only combustion chambers, fuel lines, etc. would have to be provided.
- FIG 3 shows half of the machine according to the invention in an axial section. The other half of the The machine continues essentially mirror-symmetrically to the left.
- the drive shaft 5 is rotatably mounted in the housing 2 via a spacer sleeve 15 and radial and axial bearings 16, 17 and a housing flange 18. Outside the spacer sleeve 15 there is also a coupling flange 19 and a nut 20.
- the inner of the spacer sleeve 15 is followed by the inner cam ring 7, which consists of two parts. Then on the right is a spacer sleeve 21, which leads to the corresponding inner cam ring 7 on the other side, which is intended for driving the other of the two rotating bodies .
- the two halves of the inner cam rings 7 are now pressed together via the spacer sleeves 15 and 21 and by a corresponding counter-pressure element on the left side of the machine, not shown, so that the rolling elements 9 are pressed outwards against the outer cam rings 8.
- These also consist of two halves and are rotatably arranged in a casing sleeve 22 which is connected to the rotating body 3.
- Closure flanges 23 not only hold the outer cam rings 8 firmly but also press them against one another in order to create a counterpressure for the pressure of the rolling elements 9 here.
- the compression of the halves of the inner rings 7 or outer rings 8 can also be done via spring elements.
- the cage 14, in which the rolling elements 9 are mounted, is finally fastened to the housing flange 18 and connected in a rotationally fixed manner to the cage on the other side of the arrangement via a spline toothing 24.
- the cage is fixed against the housing 2 in the circumferential direction.
- the angle setting of the cage 14 with respect to the housing can, however, still be changed by changing the angular position of the housing flange 18 with respect to the housing 2 by means of an adjustment bearing 25.
- the rolling elements 9 are not mounted directly in the cage 14, but rather in bearings 50 which are designed in the form of a guader and which are received in corresponding grooves in the cage 14 in such a way that they have no play in the circumferential direction, but move a little back and forth in the radial direction can. This enables the rolling elements 9 to be pressed outwards during tensioning.
- the housing 2 is composed of two halves, the seal 31 being provided at the dividing line 33 thereof. If the sealing effect between the vanes of the rotating bodies 3, 4 and the wall of the annular space 1 deteriorates, tightening a bolt guided through the bore 34 can ensure that the two housing halves are moved closer together, as a result of which better contact between the housing walls and Rotational bodies 3, 4 is given in the annular space, whereby the sealing effect is improved.
- the rolling elements 9 designed in the form of a double cone are provided with bevel gear teeth 51. This involves involute toothing, the involute plane being perpendicular to the axis of the rolling elements 9.
- the inside of the cam rings 7 and 8 have essentially a similar surface to the outer surface of the rolling elements 9. However, there are gaps 52 between the rings 7, 8 on the one hand and the rolling element 9 on the other hand. Rings 7, 8 on the one hand and rolling elements 9 on the other only touch in Area of the cam tracks 53, which are provided on the inner surfaces of the cam rings 7, 8 as elongate projections, which have an involute toothing on their surface which corresponds to that of the rolling elements 9.
- the teeth not only of the rolling elements 9, but also of the cam tracks 53, have one Bevel gear toothing corresponds to a larger module or a larger pitch in the middle than towards the axial ends of the rolling element 9.
- the cam tracks 53 have different distances from the center plane.
- the transmission ratio changes both from the inner cam ring 7 to the rolling element 9 and from the rolling element 9 to the outer cam ring 8. If the shaft 5 is now driven, the inner ring 7 rotates uniformly with it.
- the roller body 9 will assume a changing rotational speed, depending on how far the cam track 53 is at the point of contact between the roller body 9 and the inner ring 7 just from the center line.
- the transmission ratio between the rolling element 9 and the outer ring also varies accordingly, so that the rotating element 3 performs the desired, non-uniform rotational movement.
- the embodiment of FIG. 3 has four rolling elements 9, two of which are visible in the figure. Two further rolling elements 9 are located at an angular distance of 90 ° in front of the drawing plane and behind the drawing plane.
- the cam tracks 53 have a profile (distance from the center plane as a function of the angle around the center axis of the rolling element 9) which has a period of 90 °.
- the cam track 53 has a distance from the central plane that varies with the angle.
- the involute toothing 54 has a larger module (pitch, tooth spacing) near the center line (at B) than in the outer area (at A).
- FIG. 5 essentially corresponds to the embodiment of FIG. 3.
- the housing 2 needs therefore have only a relatively small bore through which the second cam ring 8 and the rotating body 4 are connected on the circumference of the shaft 5.
- the first cam ring 7, which is connected directly to the shaft 5, is arranged outside the rolling elements 9. A better engagement takes place between these two parts, which enables a better transmission of the torque to the rolling elements 9.
- the second cam ring 8 is arranged within the rolling elements 9 and is connected again to the rotating element 4. The advantage is that the non-uniformly moving mass is smaller than in the first embodiment.
- the first cam ring 7 is arranged next to the second cam ring 8; both cam rings are arranged within the rolling element 9.
- the first cam ring 7 is connected to the shaft 5, the second cam ring 8 to the rotary body 4 in a rotationally fixed manner.
- the torque transmission takes place without an outer cam ring.
- a freely rotatable cam ring 54 is provided, which is moved in opposite directions to the rotating body 4 and is accelerated or decelerated so that the machine runs more smoothly.
- the rotating body 9 is constructed from two parts and with a stepped bearing
- the central axis 57 is mounted on a central axis 57.
- the central axis 57 is mounted on a central axis 57.
- the rolling element consists of two parts 9a and 9b, between which bearings 60 are arranged.
- the torque is transmitted from the shaft 5 to the first cam ring 7 7 from there to the left rolling element part 9a and from there to the outer massive cam ring 54, which again counteracts or fluctuates torque fluctuations or rotational accelerations of the rotating body 4 equal.
- the torque is then transmitted from the massive cam ring 54 to the right-hand part 9b of the rolling element and from there to the inner second cam ring 8, which in turn is connected to the rotating body 4. You have a double translation here.
- both the first cam ring 7 and the second cam ring 8 act externally on the roller body 9. This results in a more reliable torque transmission from the cam rings to the rolling element and vice versa, since the rolling element 9 nestles into corresponding curved surfaces of the cam rings 7 and 8, while a more or less point-like contact takes place in the case of an inner curve ring.
- the first cam ring 7 is connected to the shaft 5, the second cam ring 8 with the rotating body 4 in a rotationally fixed manner.
- the first cam ring 7 is connected to the housing 2.
- the torque from the shaft 5 is transferred to the associated cage 14, which rotates with the shaft 5.
- the torque is then transmitted via the freely rotatable rolling element 9 to the second cam ring 8, which in turn is connected to the rotating element 4.
- the inner ring (only one inner ring half is shown), e.g. the inner ring 7 of the embodiment of FIGS. 1 to 4, as shown in FIG. 13, is provided with bevel gear teeth 54 in the pointed part and with curved tooth teeth 53 in the part lying further to the end of the truncated cone. This prevents the teeth from being very far apart at the end of the truncated cone.
- the rolling element 9 or the rolling element half 9, which is shown in FIG. 12, is of exactly complementary design.
- the interrupted cam tracks 53 continue analogously in the other part.
- the diagram in FIG. 14 shows that in the course of a cycle (0-1 on the t-axis) the angular velocity of the two cam rings 8 moves back from a minimum value to a maximum value and then back to a minimum value . After half a period, the minimum value of one curve ring has changed to the maximum value and vice versa. Exactly in the middle between the maximum values, both reach half the value. In the area of the maxima and minima, the curves are not pointed, but flattened, so that a longer period of time for gas exchange is available.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transmission Devices (AREA)
- Reciprocating Pumps (AREA)
- Hydraulic Motors (AREA)
- Retarders (AREA)
- Fluid-Damping Devices (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Centrifugal Separators (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9016807U DE9016807U1 (de) | 1990-12-12 | 1990-12-12 | Drehkolbenmaschine |
DE9016807U | 1990-12-12 | ||
PCT/EP1991/002317 WO1992010648A1 (de) | 1990-12-12 | 1991-12-04 | Drehkolbenmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0561855A1 true EP0561855A1 (de) | 1993-09-29 |
EP0561855B1 EP0561855B1 (de) | 1994-08-10 |
Family
ID=6860204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92900081A Expired - Lifetime EP0561855B1 (de) | 1990-12-12 | 1991-12-04 | Drehkolbenmaschine |
Country Status (11)
Country | Link |
---|---|
US (1) | US5326238A (de) |
EP (1) | EP0561855B1 (de) |
JP (1) | JP2915141B2 (de) |
KR (1) | KR930703524A (de) |
CN (1) | CN1042663C (de) |
AT (1) | ATE109868T1 (de) |
AU (1) | AU9025391A (de) |
BR (1) | BR9107160A (de) |
DE (2) | DE9016807U1 (de) |
DK (1) | DK0561855T3 (de) |
WO (1) | WO1992010648A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0945592B1 (de) | 1998-03-25 | 2003-05-21 | HSP Holding für Schukey-Patente GmbH | Drehkolbenmaschine |
US6289867B1 (en) | 1999-03-31 | 2001-09-18 | Cummins Engine Company, Inc. | Rotary engine |
US6695176B1 (en) * | 2002-08-08 | 2004-02-24 | Saint-Gobain Calmar Inc. | Pump dispenser having an improved discharge valve |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1701534A (en) * | 1926-10-26 | 1929-02-12 | Knopp Rudolph | Rotary engine |
US1920201A (en) * | 1929-10-28 | 1933-08-01 | Kolko Aron | Alternating piston rotary engine |
JPS60198338A (ja) * | 1984-03-22 | 1985-10-07 | Nissan Motor Co Ltd | ガスタ−ビンの起動装置 |
US4605361A (en) * | 1985-01-22 | 1986-08-12 | Cordray Robert K | Oscillating vane rotary pump or motor |
DE3624842A1 (de) * | 1986-07-23 | 1988-01-28 | Juergen Schukey | Drehkolbenmaschine |
JPS6332101A (ja) * | 1986-07-26 | 1988-02-10 | Mitsubishi Electric Corp | 回転吸排装置 |
-
1990
- 1990-12-12 DE DE9016807U patent/DE9016807U1/de not_active Expired - Lifetime
-
1991
- 1991-12-04 AT AT92900081T patent/ATE109868T1/de not_active IP Right Cessation
- 1991-12-04 JP JP4500354A patent/JP2915141B2/ja not_active Expired - Fee Related
- 1991-12-04 BR BR919107160A patent/BR9107160A/pt not_active IP Right Cessation
- 1991-12-04 DK DK92900081.8T patent/DK0561855T3/da active
- 1991-12-04 DE DE59102530T patent/DE59102530D1/de not_active Expired - Fee Related
- 1991-12-04 US US07/074,829 patent/US5326238A/en not_active Expired - Fee Related
- 1991-12-04 EP EP92900081A patent/EP0561855B1/de not_active Expired - Lifetime
- 1991-12-04 AU AU90253/91A patent/AU9025391A/en not_active Abandoned
- 1991-12-04 WO PCT/EP1991/002317 patent/WO1992010648A1/de active IP Right Grant
- 1991-12-12 CN CN91112754A patent/CN1042663C/zh not_active Expired - Fee Related
-
1993
- 1993-06-11 KR KR1019930701753A patent/KR930703524A/ko not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9210648A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU9025391A (en) | 1992-07-08 |
BR9107160A (pt) | 1994-03-22 |
CN1063141A (zh) | 1992-07-29 |
EP0561855B1 (de) | 1994-08-10 |
US5326238A (en) | 1994-07-05 |
DE59102530D1 (de) | 1994-09-15 |
DK0561855T3 (da) | 1994-12-05 |
ATE109868T1 (de) | 1994-08-15 |
WO1992010648A1 (de) | 1992-06-25 |
JP2915141B2 (ja) | 1999-07-05 |
JPH06503392A (ja) | 1994-04-14 |
DE9016807U1 (de) | 1992-04-09 |
CN1042663C (zh) | 1999-03-24 |
KR930703524A (ko) | 1993-11-30 |
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