WO1992016728A2 - Dispositif rotatif a chambre torique - Google Patents
Dispositif rotatif a chambre torique Download PDFInfo
- Publication number
- WO1992016728A2 WO1992016728A2 PCT/FR1992/000269 FR9200269W WO9216728A2 WO 1992016728 A2 WO1992016728 A2 WO 1992016728A2 FR 9200269 W FR9200269 W FR 9200269W WO 9216728 A2 WO9216728 A2 WO 9216728A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pistons
- moving parts
- axis
- integral
- rotation
- Prior art date
Links
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
- F01C1/073—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 pawl-and-ratchet type drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2250/00—Special cycles or special engines
- F02G2250/06—Beau de Rochas constant volume cycles
Definitions
- the present invention relates to a device for driving a central axis in rotation, or comprising a part capable of being driven in rotation by a central axis, comprising a fixed toric chamber, centered around the axis, provided with at least an inlet light and at least one fluid outlet light, at least two pairs of pistons, said pistons being integral two by two with two moving parts centered around the axis, each piston being in the form toroid portion and able to slide inside said toroidal chamber, and a kinematic system for driving the central axis in rotation in one and the same direction by the moving parts integral with the pistons, or vice versa.
- Known thermal engines generally comprise a transformation of a linear movement (cylinder / piston) into rotary movement by means of a camshaft system.
- Intake and exhaust ports as well as an ignition or injection device are provided in the walls of the torus so as to cooperate with the internal volume of this torus between said pistons to carry out an explosion cycle or Beau de Rochas four-stroke combustion system.
- crankcase drive system based on connecting rods and cranks.
- crankcase drive system using two rotating plates, sliding one over the other between two cheeks, generates significant friction.
- each pair being integral with a moving part centered around the axis, each piston being in the form of a torus portion and suitable for sliding inside said toroidal chamber, and
- two frusto-conical pinions placed opposite, centered around the axis, each respectively integral with one of said movable parts and constituting the planet wheels of a differential, at least two conical pinion gears of the differential, each pinion being adapted to rotate on itself around an axis perpendicular to, and integral with, the central axis of rotation to mesh said frustoconical gears,. and non-return means arranged to allow the rotation of the moving parts only in one and the same direction.
- the moving parts support the pistons in their rotation, a clearance being provided between the internal wall of the chamber and the external wall of the pistons.
- the invention also provides a device for pumping a fluid comprising:
- a central axis suitable for being driven in rotation by a motor, a fixed enclosure defining at least partially a toroidal chamber, centered around the axis, provided with at least two intake lights and at least two lights d exhaust of a fluid to be pumped,
- each pair being integral with a moving part centered around the axis, each piston being in the form of a torus portion and suitable for sliding inside said toroidal chamber, and
- a kinematic system for driving in rotation by the central axis of the movable parts integral with the pistons, said kinematic system comprising, two frustoconical pinions opposite, centered around the axis, each respectively secured to one of said movable parts , and constituting the planetaries of a differential, at least two planet bevel gears of the differential, each bevel gear being able to rotate on itself around an axis perpendicular to, and integral with, the central axis of rotation to mesh said frustoconical gables, and alternative retaining means of each moving part with respect to the fixed enclosure.
- the retaining means can for example be triggered as a function of a pressure on the downstream face of a piston, or after a determined time.
- the moving parts of the pumping device support the pistons in their rotation, a clearance being provided to minimize friction.
- the differential constitutes a spherical epicyclic gear train
- the toroidal chamber is delimited on the one hand by the peripheral fixed enclosure and on the other hand by the radial ends of the movable parts secured to the pistons;
- the enclosure of the device comprises two lights, namely an intake light M and an exhaust light N, spaced at a distance at least equal to the length of a piston, for example between a length and three piston lengths; a person skilled in the art will take account of the scanning phenomenon to fix such a distance more precisely, in a manner known per se;
- the non-return means for blocking the rotation in one direction are means which do not allow the parts integral with the pistons to rotate in a single and same direction, for example by pins controlled by the position of the planet, by ratchet or by freewheeling means with non-return ball;
- a system for retaining or braking the moving parts integral with the planet gears between a first position R and a second position K is provided, intended to obtain optimal compression whatever the speed of the engine, in particular at start-up;
- the ignition is triggered by the angular position taken by the associated moving parts
- the tightness of the chambers is ensured on the one hand by segments inserted in grooves formed on the circumference of the pistons and on the other hand by circular segments situated between the fixed enclosure and the radial ends of the moving parts delimiting the chamber toric; a lubrication system using the centrifugation of the oil created by the rotary movement itself and its circulation thanks to an exhaust located after the passage over the parts to be lubricated is provided, the exhaust allowing a return of the lubricant to the axis of the motor ; such a system does not of course exclude the provision of a make-up oil pump, for example driven by the central axis;
- the invention also proposes a method of implementing the device described above, in which the four times of the engine are simultaneous and occur thanks to the still positive but relative angular movements of the pistons. These movements therefore generate variable volume working chambers.
- FIG. 1 is a schematic side section along the joint plane, of the toroidal motor according to the embodiment of the invention more particularly described here.
- FIG. 1 is a section on II-II, of the motor of Figure 1.
- FIG. 3 shows schematically another embodiment of the non-return means arranged to cause rotation only in one and the same direction of the axis of a device according to the invention.
- FIGs 4a to 4d show four diagrams to illustrate the different operating phases of an engine of the type described with reference to Figure 1.
- Figure 1 shows schematically in cross section a device 1 for driving a central axis 2 comprising a fixed enclosure 3 at least partially defining a toric chamber 4, centered around the axis.
- the enclosure 3 is provided with an inlet light 5 and an exhaust light 6 with a combustion fluid, said lights being separated from each other by a portion of an arc of a circle d 'angle at the center for example equal to 20 °, of dimension greater than that of the length of the piston.
- the enclosure is for example formed in two parts 3 'and 3 "(see FIG. 2) symmetrical with respect to the plane 14 perpendicular to the axis 2, bolts joining the two parts.
- the device 1 comprises two pairs of pistons 7, 8 and 7 ′, 8 ′ in the form of a portion of a male torus and capable of sliding inside the chamber 4.
- a clearance 9 is provided between the internal wall of the enclosure and the outer walls of the pistons which are provided with cylindrical sealing segments.
- the clearance is sufficient to allow the formation of a lubricant film at all operating temperatures.
- the sealing for the pistons is of conventional type (fire segments, etc.).
- the device 1 also comprises a kinematic system 11 for driving in rotation, in a single and same direction indicated by arrow 12, of the central axis 2.
- the system 12 comprises two identical moving parts 13 (left side of FIG. 2) and 13 '(right side), symmetrical with respect to the plane 14.
- Each movable part 13 (13 ') is for example made up of a plate 15 (15') of substantially annular section, centered around the axis 2, provided with a central recess crossed by said axis 2.
- a frusto-conical pinion 16 (16 ') which constitutes one of the two planetary gears of the spherical planetary gear differential of the embodiment of the invention more particularly described here. '
- the pistons 7 and 8 (7 'and 8') are moreover fixed in the radial direction at the periphery 17 (17 ') in the form of a flange of the plate 15 (15'), in a diametrically opposite manner, for example by pins 17a (17'a), as shown.
- the flange 17 (17 ') is circular and directed towards the outside of the device. It comprises a peripheral wall capable of constituting, with the internal wall 18 of the enclosure 3, a toric chamber with a continuous wall of circular cross section.
- Each movable part can for example comprise on the internal face of its flange 17 (17 ') a groove 17b (17'b) suitable for cooperating with a pin 17c (17'c) of the flange opposite.
- the groove 17b (17'b) extends for example over an arc of a 45 ° circle and determines the relative extreme positions of the two moving parts.
- the device 1 as more particularly described also comprises three bevel gears 20, 21, 22 whose vertices are directed towards the axis, arranged to mesh with the frusto-conical gears 16 and 16 'of the moving parts.
- the pinions 20, 21 and 22 form the satellites of the differential. They are capable of turning on themselves around their respective axes 23, 24, 25 which are integral with the central axis 2, perpendicular to, and directed in the radial direction of, the latter, around which they are distributed angularly regularly .
- Non-return means 26 are also provided, and are for example constituted by two free wheels 27 (27') arranged in a manner known per se to rotate only in one direction.
- tubular portions are fitted on the axis 2, projecting towards the inside of the casing, on either side of the device.
- Sealed bearings 30 (30 '), 31 (31') are also provided in a manner known per se, and ensure the passage and rotation of the axis 2 to the through the casing 29, which contains the necessary lubrication liquid.
- a spark plug 32 (see FIG. 1) is provided screwed onto the enclosure 3 which it passes through, and allows ignition, as will be seen with reference to FIGS. 4.
- An injection system can also be perfectly provided in the case of an injection engine.
- It is for example constituted by a double external cooling jacket and / or an internal circuit injecting the coolant inside the parts.
- Cooling fins may also be provided, etc.
- a useful volume of 320 cm 3 can be provided, then equivalent to a conventional engine of 640 cm 3 .
- FIG. 3 shows another embodiment of the non-return means usable in a device according to the invention.
- the means consist, for example, of a circular plate 40 comprising a groove 41 substantially in the form of a Y, the base of which is centered on the axis of the plate and the branches of which are directed outwards, as shown in FIG. 3 .
- the shape of the grooves is in fact determined by the function F (D, A).
- the groove is adapted to cooperate with a pin 42 provided with a wheel (not shown) secured to the movable part 13 and describing the circle 44; the plate 40 is driven by the pinion 45 in rotation on the axis 46 fixed to the casing 29 ′ and meshed with the pinion 47 secured to the axis of the motor 2.
- the pin is released by the groove 41 during the start of the next cycle, in synchronization with the second non-return means cooperating with the other planet.
- the pairs of pistons are respectively identified by the letters A and C and B and D, the letter M indicating the intake light and the letter N the exhaust light.
- A which cannot move back, is fixed until the expansion pressure becomes equal to the pressure of the compression in progress in space (D, A). From this moment (see Figure 4b), A tends to move under the effect of compression but offers resistance due to the inertia of the part and the planetary assembly to which it is integral.
- the piston D slows down its movement under the effect of the compression of the gas, thus using the kinetic energy of the planet wheel of which it is integral.
- the mathematical calculation makes it possible to calculate the moment of inertia I of the planetary part (function of the mass m and the mean radius r) for a speed de 'of the axis of the engine, conditions for which the process is feasible, within the framework of an operation according to the BEAU DE ROCHAS cycle, or an approximate cycle.
- the energy necessary to carry out the compression from the moment when the expansion and compression pressures are equal until the achievement of the optimal compression is a function of the parameters concerning the pistons D and A.
- the average masses and radii of the moving parts integral with the planetary are arranged to be such that their kinetic energy is always sufficient to achieve compression and for D to reach point R.
- a person skilled in the art also determines, in a manner known per se, the position of the point K as a function of the parameters chosen.
- the new trigger causes the reduction of the space (A, B) and therefore the escape of the residue of the previous trigger (A, B) and also causes both the enlargement of the space (B, C), therefore a new admission and the decrease in space (C, D) therefore a new compression.
- a variant to the description of compression is as follows: the kinetic energy available of the movable part secured to the planetary in motion is different from the energy necessary for compression, and the explosion occurs as soon as the compression ratio is optimum; a system driven by the motor axis is then provided to supply or absorb the energy difference, thus forcing D to reach the initial position R.
- This system is for example that described with reference to Figure 3 as a restraint system.
- the invention also proposes a device of the type described above in which by kinematic inversion, and by modifications simple lights (including their number and location) and the restraint system, these can make this motor, when the main axis is driven, a liquid or gas pump.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9103744A FR2674571B1 (fr) | 1991-03-25 | 1991-03-25 | Moteur rotatif a chambres toriques variables. |
FR91/03744 | 1991-03-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1992016728A2 true WO1992016728A2 (fr) | 1992-10-01 |
WO1992016728A3 WO1992016728A3 (fr) | 1992-11-12 |
Family
ID=9411199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1992/000269 WO1992016728A2 (fr) | 1991-03-25 | 1992-03-25 | Dispositif rotatif a chambre torique |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0577715A1 (fr) |
FR (1) | FR2674571B1 (fr) |
WO (1) | WO1992016728A2 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2312248A (en) * | 1996-04-17 | 1997-10-22 | Terry Thomas Cook | Rotary actuator |
WO2008080574A1 (fr) | 2007-01-02 | 2008-07-10 | Heinz Raubacher | Machine à piston rotatif |
ES2413192R1 (es) * | 2011-10-05 | 2013-11-08 | Alvarez Juan Antonio Castillo | Máquina térmica, procedimiento de control de la velocidad de rotación en una máquina térmica, y procedimiento de diseño de un perfil de leva para una máquina térmica. |
WO2018063011A1 (fr) * | 2016-09-27 | 2018-04-05 | Zulawski Slawomir | Élément hydraulique à palette rotative |
FR3086689A1 (fr) | 2018-10-01 | 2020-04-03 | Patrice Christian Philippe Charles Chevalier | Moteur a hydrogene a chambre torique et cylindree variable, et procedes associes |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2882398A1 (fr) * | 2005-02-22 | 2006-08-25 | Jacques Dubus | Moteur rotatif a combustion interne a quatre temps simultanes |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR546575A (fr) * | 1922-01-31 | 1922-11-16 | Moteur à explosion, à cylindre annulaire | |
FR652671A (fr) * | 1928-04-13 | 1929-03-12 | Moteurs rotatifs | |
US1790534A (en) * | 1931-01-27 | Valveless internal combustion engine | ||
US2126795A (en) * | 1937-02-01 | 1938-08-16 | Mcintyre Hugh | Rotary internal combustion engine |
US2349848A (en) * | 1942-12-08 | 1944-05-30 | Davids Robert Brewster | Relative motion rotative mechanism |
FR1031180A (fr) * | 1951-01-19 | 1953-06-22 | Moteur torique | |
US4084550A (en) * | 1973-07-02 | 1978-04-18 | Peter Gaspar | Rotary engines |
EP0024460A1 (fr) * | 1979-09-03 | 1981-03-11 | Louis Sen. Geraud | Procédé pour organiser, avec une nouvelle architecture, des machines rotatives à régimes divers et dispositifs pour la mise en oeuvre |
US4455128A (en) * | 1981-12-14 | 1984-06-19 | Seybold Frederick W | Rotary internal combustion engine with uniformly rotating pistons cooperating with reaction elements having a varying speed of rotation and oscillating motion |
FR2613423A1 (fr) * | 1987-03-31 | 1988-10-07 | Bermes Robert | Moteur a pistons du type rotatif |
-
1991
- 1991-03-25 FR FR9103744A patent/FR2674571B1/fr not_active Expired - Fee Related
-
1992
- 1992-03-25 WO PCT/FR1992/000269 patent/WO1992016728A2/fr not_active Application Discontinuation
- 1992-03-25 EP EP19920909031 patent/EP0577715A1/fr not_active Withdrawn
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1790534A (en) * | 1931-01-27 | Valveless internal combustion engine | ||
FR546575A (fr) * | 1922-01-31 | 1922-11-16 | Moteur à explosion, à cylindre annulaire | |
FR652671A (fr) * | 1928-04-13 | 1929-03-12 | Moteurs rotatifs | |
US2126795A (en) * | 1937-02-01 | 1938-08-16 | Mcintyre Hugh | Rotary internal combustion engine |
US2349848A (en) * | 1942-12-08 | 1944-05-30 | Davids Robert Brewster | Relative motion rotative mechanism |
FR1031180A (fr) * | 1951-01-19 | 1953-06-22 | Moteur torique | |
US4084550A (en) * | 1973-07-02 | 1978-04-18 | Peter Gaspar | Rotary engines |
EP0024460A1 (fr) * | 1979-09-03 | 1981-03-11 | Louis Sen. Geraud | Procédé pour organiser, avec une nouvelle architecture, des machines rotatives à régimes divers et dispositifs pour la mise en oeuvre |
US4455128A (en) * | 1981-12-14 | 1984-06-19 | Seybold Frederick W | Rotary internal combustion engine with uniformly rotating pistons cooperating with reaction elements having a varying speed of rotation and oscillating motion |
FR2613423A1 (fr) * | 1987-03-31 | 1988-10-07 | Bermes Robert | Moteur a pistons du type rotatif |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2312248A (en) * | 1996-04-17 | 1997-10-22 | Terry Thomas Cook | Rotary actuator |
WO2008080574A1 (fr) | 2007-01-02 | 2008-07-10 | Heinz Raubacher | Machine à piston rotatif |
DE102007001021B4 (de) * | 2007-01-02 | 2010-11-18 | Heinz Raubacher | Kreiskolbenmaschine |
US8376725B2 (en) | 2007-01-02 | 2013-02-19 | Heinz Raubacher | Planetary rotation machine |
KR101293702B1 (ko) * | 2007-01-02 | 2013-08-06 | 하인즈 라우바처 | 성형 회전 기계 |
ES2413192R1 (es) * | 2011-10-05 | 2013-11-08 | Alvarez Juan Antonio Castillo | Máquina térmica, procedimiento de control de la velocidad de rotación en una máquina térmica, y procedimiento de diseño de un perfil de leva para una máquina térmica. |
US9447687B2 (en) | 2011-10-05 | 2016-09-20 | Juan Antonio CASTILLO ÁLVAREZ | Heat engine, method of control of the rotational speed in a heat engine, and method of design of a cam profile for a heat engine |
WO2018063011A1 (fr) * | 2016-09-27 | 2018-04-05 | Zulawski Slawomir | Élément hydraulique à palette rotative |
FR3086689A1 (fr) | 2018-10-01 | 2020-04-03 | Patrice Christian Philippe Charles Chevalier | Moteur a hydrogene a chambre torique et cylindree variable, et procedes associes |
Also Published As
Publication number | Publication date |
---|---|
WO1992016728A3 (fr) | 1992-11-12 |
FR2674571A1 (fr) | 1992-10-02 |
FR2674571B1 (fr) | 1993-06-18 |
EP0577715A1 (fr) | 1994-01-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2938385A1 (fr) | Turbomachine equipee d'un groupe de lubrification | |
EP0034958B1 (fr) | Moteur avec pistons rotatifs à variation cyclique de vitesse et moyens d'entraînement | |
WO1992016728A2 (fr) | Dispositif rotatif a chambre torique | |
FR2518646A1 (fr) | Moteur a combustion a piston rotatif | |
WO2014048838A1 (fr) | Différentiel intégrant un appareil hydraulique | |
FR2898383A1 (fr) | Ensemble mecanique pour la realisation de machines telles que compresseurs, moteurs thermiques ou autres, dotees d'un cylindre et d'un piston | |
FR2766518A1 (fr) | Moteur thermique rotatif orbital | |
FR2628479A1 (fr) | Assemblage piston et cylindre a mouvement alternatif pour moteurs a combustion interne et equivalent | |
FR2694336A1 (fr) | Dispositif de liaison cinématique pour pistons rotatifs et moteur comprenant un tel dispositif. | |
FR2613770A1 (fr) | Moteur a combustion interne a deux temps | |
FR2716493A1 (fr) | Machine à pistons rotatifs utilisable notamment en tant que moteur thermique. | |
FR2807466A1 (fr) | Moteur thermique avec ensembles piston/cylindre a deplacement relatifs autour d'un axe | |
FR3025001A1 (fr) | Variante simplifiee de moteur thermique rotatif | |
FR2988776A1 (fr) | Moteur rotatif a combustion interne et a taux de compression variable | |
FR2474586A1 (fr) | Moteur a combustion interne, a disque, sans vilebrequin et sans bielle | |
EP0083892A2 (fr) | Machine rotative à pistons à vitesse de rotation non uniforme | |
WO2021084176A1 (fr) | Moteur à combustion interne | |
WO2015007956A1 (fr) | Moteur rotatif a combustion interne et a taux de compression variable | |
FR2742478A1 (fr) | Machine d'entrainement rotatif a chambres annulaires, du type moteur thermique ou pompe | |
FR2519697A1 (fr) | Machine a pistons | |
FR3087837A1 (fr) | Ensemble pour turbomachine | |
FR2810694A1 (fr) | Moteur a phase isochore | |
BE370233A (fr) | ||
FR2861801A1 (fr) | Moteur rotatif a pression de fluide | |
FR2938303A1 (fr) | Distribution mecanique des gaz d'echappement partiellement recycles pour un moteur a combustion interne |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): CA JP RU US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FR GB GR IT LU MC NL SE |
|
AK | Designated states |
Kind code of ref document: A3 Designated state(s): CA JP RU US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FR GB GR IT LU MC NL SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1992909031 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1992909031 Country of ref document: EP |
|
ENP | Entry into the national phase in: |
Ref country code: US Ref document number: 1994 122415 Date of ref document: 19940412 Kind code of ref document: A Format of ref document f/p: F |
|
NENP | Non-entry into the national phase in: |
Ref country code: CA |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1992909031 Country of ref document: EP |