baber/WOPTO huggingface dataset:
Patent FR-2588886-A1 (FR)
Inventor: SONY-AKKAWI JEAN
IPC: D01C1/04
Filed: 1985-10-18
Abstract: The process for biochemical retting of phloem-fiber plants such as hemp, flax, ramie, jute, kenaf, etc. permits separation of the fibers of the bundle for subsequent utilization in the textile or paratextile industry.  The process comprises treating the fibrous plants with at least one SPS-ase enzyme and preferably a mixture of enzymes comprising  beta -glucanase, pectinase and SPS-ase.
Patent FR-2572336-A1 (FR)
Title: Roulette a frein
Inventor: JAMES MICHAEL JOSEPH
IPC: B62B5/04
Filed: 1985-10-30
Abstract: LA PRESENTE INVENTION CONCERNE UN PIED ROULANT COMPRENANT AU MOINS UNE ROULETTE 2 ET DES MOYENS DE FREINAGE QUI COMPORTENT UN ORGANE DE FREINAGE 5 COMMANDE DEPUIS L'EXTERIEUR ET MONTE BASCULANT DANS UNE CHAPE DE LA ROULETTE POUR VENIR EN PRISE AVEC DES SAILLIES INTERIEURES 20 DE LA ROULETTE AFIN DE LA BLOQUER EN ROTATION. UNE SAILLIE D'ARRET 11B EST MONTEE SUR LE CORPS DE L'ORGANE DE FREINAGE 5 POUR VENIR EN PRISE AVEC UN ELEMENT 23 FORME DANS LA CHAPE DE LA ROULETTE ET MAINTENIR AINSI L'ORGANE DE FREINAGE 5 EN POSITION DE BLOCAGE ET CELUI-CI COMPREND EN OUTRE UNE SAILLIE DE BLOCAGE 16 MONTEE DE MANIERE ELASTIQUE AFIN QUE SA LIAISON AVEC LE CORPS DE L'ORGANE DE FREINAGE 5 PUISSE FLECHIR SI LE MOUVEMENT DE BLOCAGE DE LA SAILLIE DE BLOCAGE EST ENTRAVE PAR LE CONTACT DE CELLE-CI AVEC LE BORD DE L'UNE DES SAILLIES 20 DE LA ROULETTE, POUR PERMETTRE A LA SAILLIE D'ARRET DE VENIR EN PRISE AVEC LEDIT ELEMENT DE LA CHAPE ET MAINTENIR L'ORGANE DE FREINAGE 5 EN POSITION DE BLOCAGE, LA LIAISON ELASTIQUE DEPLACANT LA SAILLIE DE BLOCAGE VERS LA POSITION DE BLOCAGE DE LA ROULETTE SI CELLE-CI COMMENCE A TOURNER. APPLICATION NOTAMMENT AUX CHARIOTS A ROULETTES UTILISES DANS LES HOPITAUX.
Patent FR-2578362-A1 (FR)
Title: Element de contact electrique femelle presentant un effort d'accouplement relativement reduit, borne et ensemble connecteur correspondants
IPC: H01R13/506
Filed: 1985-12-20
Abstract: ELEMENT DE CONTACT ELECTRIQUE FEMELLE 1 COMPRENANT UNE PREMIERE PORTION 2 POUVANT RECEVOIR UN ELEMENT DE CONTACT ELECTRIQUE MALE CORRESPONDANT 3 AVEC UN EFFORT D'ACCOUPLEMENT RELATIVEMENT REDUIT, CETTE PREMIERE PORTION 2 AYANT UNE FORME ESSENTIELLEMENT CYLINDRIQUE ET PRESENTANT UN TRONCON 7 AYANT DES ZONES DE CONTACT 15 D'UNE SURFACE RELATIVEMENT REDUITE.
Patent FR-2603641-A1 (FR)
Title: Wood panelling with raised features
Inventor: PLANTIER ANTOINE
IPC: E04F19/06
Filed: 1986-01-09
Abstract: The invention relates to wood panelling with raised features. The subject of the invention is wood panelling with raised features, characterised in that it consists of an alternation of conventional wood panelling elements 1 and of wood panelling elements of variable width 2, 3, 4, 5 having, on their visible face, any raised features which can be identical or variable. Application to wood panelling.
Patent FR-2597327-A1 (FR)
Title: Set of odontological instruments for progressive enlargement of dental root canals
IPC: A61C5/02
Filed: 1986-04-18
Abstract: The present invention relates to a set of odontological instruments for reaming and progressively enlarging root canals 3, completely or only from the third apical portion, without changing the diameter of the existing apical orifice 6 before the start of the reaming of the canals; this set comprises a series of probes whose points have a different and progressive diameter, from one probe to the next in the series, for initial determination of the diameter of the apical orifice 6 and a corresponding plurality of series 11 of odontological instruments with conical development starting from the point 13 towards the handle 12 of the instrument, this section having a progressively increasing diameter going from one instrument to the next, while the diameter of the point cross-section is constant for all the instruments in one series 11 and corresponds to that of the free end of one of the reference probes.
Patent FR-2599646-A1 (FR)
Inventor: BOULOT DOMINIQUE
IPC: B21B13/14
Filed: 1986-06-04
Abstract: A roll with rotating shell comprising a fixed support beam (2), a tubular shell (1) rotatably mounted on the support beam (2) about an axis, a plurality of shoes for holding the shell distributed side by side along the length of the beam in an axial bearing plane (P), each shoe (3) being slideably mounted radially between the shell (1) and the support beam (2) and connected to an arrangement (21, 33) of regulating thrust and to an arrangement (51, 55) of introducing continuously a lubricant into the gap (52) between the bearing face (31) of the shoe and the internal face (13) of the shell. Each shoe (3) is provided, on the part (36) of its bearing face (31) which is turned upstream with respect to the direction of rotation of the shell (1), with an arrangement (6) of centering by lateral bearing on the internal face (13) of the shell in a radial direction (D) inclined with respect to the bearing plane (P) and under sufficient pressure to cause a transverse shift in the shoe and to create the effect of a wedge at the downstream end of the latter. The invention applies in particular to rolling mills used in the metallurgy industry to produce sheets or sheet metal.
Patent FR-2583752-A1 (FR)
Title: Procede de preparation de composes d'imidazoline 1,2-substituee
Inventor: KUBO MAKOTO
IPC: C07D233/16
Filed: 1986-06-19
Abstract: SELON L'INVENTION, UN COMPOSE D'IMIDAZOLINE 1,2-SUBSTITUEE DE FORMULE(I): (CF DESSIN DANS BOPI) DANS LAQUELLE R EST UN GROUPE ALKYLE OU ALCENYLE AYANT DE 8 A 22ATOMES DE CARBONE ET N EST 2 OU 3, EST PRODUIT: 1EN CHARGEANT DANS UN REACTEUR UNE DIALKYLENETRIAMINEII AVEC UN ACIDE GRAS SUPERIEUR DE FORMULE RCOOH OU UN DE SES ESTERS III A UN RAPPORT MOLAIRE DU COMPOSEIII AU COMPOSE II DE 1,5:1 A 1,8:1; 2EN CONDUISANT LA REACTION A UNE TEMPERATURE INTERNE DE 100 A 250C SOUS PRESSION REDUITE; 3EN AJOUTANT AU MELANGE REACTIONNEL DE L'ACIDE GRAS OU SON ESTER DE SORTE QUE LE RAPPORT MOLAIRE DEFINI CI-DESSUS ATTEIGNE AU MOINS 2,0:1; ET 4EN POURSUIVANT LA REACTION A 100 A 250C SOUS PRESSION REDUITE. LA REACTION A LIEU AVEC UN RENDEMENT ELEVE EN LE PRODUIT I, SANS SOUS-PRODUITS DE TYPE AMINES PRIMAIRES ET SECONDAIRES. APPLICATION A LA FABRICATION D'ASSOUPLISSANTS POUR TEXTILES.
Patent FR-2600821-A1 (FR)
Title: Dispositif semi-conducteur a heterojonction et double canal, son application a un transistor a effet de champ, et son application a un dispositif de transductance negative
Inventor: VINTER BORGE
IPC: H01L29/812
Filed: 1986-06-30
Abstract: LE DISPOSITIF SEMI-CONDUCTEUR A HETEROJONCTION COMPORTE UN DOUBLE CANAL AYANT UNE COUCHE A MOBILITE FORTE 1, UNE COUCHE BARRIERE 2, ET UNE COUCHE A MOBILITE REDUITE 3, LA COUCHE BARRIERE ETANT SUFFISAMMENT MINCE POUR QUE LES PORTEURS PUISSENT PASSER DE LA COUCHE A MOBILITE REDUITE A LA COUCHE A MOBILITE PLUS FORTE PAR EFFET TUNNEL, LORS DE VARIATIONS DU CHAMP ELECTRIQUE DE POLARISATION DE CE DOUBLE CANAL. CE DISPOSITIF EST APPLICABLE A LA REALISATION DE TRANSISTORS A EFFET DE CHAMP A TEMPS DE REPONSE RAPIDE, SANS VARIATION DE CHARGE DU CANAL, MAIS AVEC VARIATION DE LA MOBILITE DE PORTEURS. IL S'APPLIQUE EGALEMENT AUX DISPOSITIFS A TRANSCONDUCTANCE NEGATIVE UTILISABLES COMME OSCILLATEUR OU TRANSISTOR COMPLEMENTAIRE DANS LES CIRCUITS INTEGRES.
Patent FR-2603560-A1 (FR)
Title: Storage device
IPC: A45C5/00
Filed: 1986-09-08
Abstract: The present invention relates to a storage device allowing the display and easy accessibility of the equipment that it contains. It is constituted by a box B, mobile panels 1, 1a, 2, 3, and by articulation and positioning mechanisms. The materials and proportions in which the device will be produced will depend on the technical field to which it belongs. The invention may be used in the form of a tool box, case, attaché case, suitcase on any other storage system. It was designed to facilitate the transportation, use and preservation of the equipment necessary for certain trades.
Patent FR-2607605-A1 (FR)
Title: Device for gripping a gear lever
Inventor: CHAMPION BERNARD
IPC: G05G1/06
Filed: 1986-12-02
Abstract: Device for gripping a gear lever 1 characterised in that it comprises an insert 2 integrated into the knob 3, the said insert 2 being clipped onto the cylindrical end 4 of the said gear lever 1, which interacts by means of a groove 5 with clips 10 formed at the end of the said insert 2.
Patent WO-8707112-A1 (WO)
Inventor: BALLANTIER ALFRED
IPC: A01B69/04
Filed: 1987-05-19
Abstract: Coupling device characterized in that it comprises a stationary frame receiving a movable frame (3) which is laterally translatable perpendicular to the tractor (10), the moveable frame (3) being self-slidable by the action of two hydraulic cylinders (4, 5) controlled by control members cooperating with contactors, the agricultural equipment being automatically and permanently guided with respect to a reference furrow (7, 12, 15, 17, 19) which is previously drawn so as to obtain an equidistant spacing d between the successive culture passages (11, 13, 16, 18).
Patent FR-2593789-A1 (FR)
Title: Procede et dispositif pour le transfert de petits paquets ou analogues dans une position orientee au choix en direction longitudinale ou transversale sur une bande transporteuse d'une machine a emballer
Inventor: KRAMER ERHARD
IPC: B65G47/244
Filed: 1987-02-03
Abstract: Les petits paquets 3 ou analogues sont guidés de façon forcée et continue aussi bien lorsqu'ils sont transférés dans une position orientée en direction longitudinale que dans une position orientée en direction transversale, à l'aide d'un dispositif de pivotement 12 et d'un dispositif de guidage à rouleau et à piste 14 comprenant une voie d'aiguillage et de guidage déplaçable 22, dans laquelle sont guidés de façon forcée les rouleaux de guidage 18 d'un mécanisme directeur du dispositif de pivotement 22. Par un déplacement de la voie d'aiguillage et de guidage 22 parallèlement ou en oblique par rapport à la direction du parcours des petits paquets, ceux-ci peuvent être transférés sur une bande transporteuse dans une position longitudinale, ou tournés sur 90 degrés pour être amenés à une position transversale. (CF DESSIN DANS BOPI)
Patent FR-2610654-A1 (FR)
Title: Composite material for heat and/or sound insulation and absorption and process for its manufacture
Inventor: TSCHUDIN ROLF
IPC: E04B1/84
Filed: 1987-02-05
Abstract: Composite material for heat and/or sound insulation and absorption. This material is advantageously made up of a sheet 10 of a heat and/or sound insulating material consisting, in fact, of a first layer of synthetic foam 10a and of a second layer 10b of synthetic foam, these two layers being separated by a heavy mass 12 made up of a PVC sheet. A grid 11 is integrally attached to the free face of the layer 10a. The free face of the layer 10b is coated with an adhesive film 13 enabling the material to be placed on a panel of sheet metal 14 or the like. This material is advantageously employed for the construction of paint booths, mobile workshops, ventilation and air treatment chambers, white rooms or sterile chambers or even extension offices and the like.
Patent FR-2610903-A1 (FR)
Title: Method and package for the cold preservation, at a temperature of about 0 DEG C, of a perishable product and in particular of a fish product
Inventor: TROADEC JEAN-RENE
IPC: B65D81/26
Filed: 1987-02-13
Abstract: The invention relates to a package for the cold preservation, at a temperature of about 0 DEG C, in a non-confined ambient atmosphere, by means of ice 15, of a perishable product 12. It is characterised in that it comprises a grid 10, disposed above the bottom 5, which divides the inside volume of the package into two compartments, namely an upper compartment 23 in which the product 12 and its covering of ice 15 are disposed such that they rest upon the grid, and a lower compartment 13, in that the said package is sealed at least to liquids, at least in its lower compartment, and closed in a non-hermetic manner at the upper compartment and in that, in the lower compartment, there are disposed a mattress 11 made of a material capable of absorbing the water resulting from the melting and the liquids coming from the product itself, and a dry compound 19 of salt and sugar capable of reacting with the water provided by the melting of the ice in order, by a brining effect, to maintain the inside volume of the package at low temperature. Applicable in particular to the storage and transport of fish products.
Patent FR-2594452-A1 (FR)
Title: Machine a traitement thermique continu par convexion notamment a usage textile
Inventor: FREIBERG HELGE
IPC: F26B23/02
Filed: 1987-02-16
Abstract: Dans une machine à traitement thermique continu par convexion par de l'air de circulation accéléré par une soufflante 10 et chauffé dans un échangeur de chaleur 9 disposé dans une enceinte d'aspiration en amont de la soufflante, des substances parasites entraînées par l'air recyclé peuvent être éliminées thermiquement à environ 750 degrés C dans un système de postcombustion intégré à l'enceinte d'aspiration 8 dans la mesure où l'on réchauffe préalablement l'air d'évacuation à envoyer vers la combustion grâce à de la chaleur provenant du système de post-combustion. Application aux machines textiles traitant des bandes de tissus. (CF DESSIN DANS BOPI)
Patent FR-2611169-A1 (FR)
Title: Procede de montage dans un vehicule automobile d'un appareil de chauffage et/ou de climatisation et unite de montage pour la mise en oeuvre de ce procede
Inventor: DANIEAU JACQUES
IPC: B60H1/00
Filed: 1987-02-20
Abstract: ON FIXE LE GROUPE MOTEUR-VENTILATEUR 65, 67 DE L'APPAREIL SUR LA FACE 64 TOURNEE VERS L'HABITACLE 6 D'UNE CLOISON 20 SEPARANT CE DERNIER DU COMPARTIMENT MOTEUR 4, EN REGARD D'AU MOINS UNE OUVERTURE 37 MENAGEE A TRAVERS LA CLOISON POUR UN ACCES ULTERIEUR A CE GROUPE A PARTIR DU COMPARTIMENT MOTEUR.
Patent FR-2594730-A1 (FR)
Title: Pneumatically controlled spot-welding tongs (spot welder gun)
Inventor: PITSCH ANDREAS
IPC: B23K11/31
Filed: 1987-02-18
Abstract: Spot-welding tongs (spot welder gun); The branches 1, 2 of these tongs are made from pressed (stamped) sheet metal and pivot about a common pin 3; each branch is composed of two parts 1a, 1b; 2a, 2b stiffened by means of ribs 13 and folded-over edges 14, these branches 2, 3 each gripping an electrode holder 6, 7 by means of bolts 37; these pressed (stamped) parts have collets into which respective insulating bearing bushes are fitted; pressed (stamped) part 1b, 2b of each branch is laterally offset by cranking with respect to its pivoting plane at the location of the respective pivoting rings, one of these rings including a connection location 28 for a lamellar strip 10, 11 for feeding with welding current; the pressed (stamped) parts 2a, 2b of the branch 2 pivoting on the body 19 of the welding cylinder 12 are divided into two at the location of this body 19. Application to welding tongs (welder guns), especially for robots.
Patent FR-2613080-A1 (FR)
Title: Method and devices for directional detection with distance threshold
IPC: G01S13/931
Filed: 1987-03-26
Abstract: The method and devices carry out detection in a given direction up to a given distance. Waves 1 originating from a transmitter 2 are attenuated beyond a distance 3 by their intersection with waves 4 in phase opposition sent from a second transmitter 5 to the point where, beyond a distance 6, an object 7 is no longer picked up by the receiver 8 associated or combined with the first transmitter. On the other hand, any object 9 situated at a distance less than the distance 3 is detected and triggers the alarm system 10 after the unit 11 has amplified and selected the received signal according to its power. Intended especially for the detection of nearby vehicles, obstacles and people.
Patent FR-2622452-A1 (FR)
Title: Medicament based on lactobacillus for the prevention and treatment of vaginal dysbacterioses
Inventor: KORSHUNOV VALERY MIKHAILOVICH
IPC: A61K35/747
Filed: 1987-10-30
Abstract: The medicament for the prevention and therapy of vaginal dysbacterioses, containing a bacterial culture, according to the invention, contains a mixture of Lactobacillus acidophilus strain  mu M pi M B-3324 and Lactobacillus acidophilus strain  mu M pi M B-3325, taken in a ratio of 1:1 and selected by natural selection, on the basis of the manifestation of adhesiveness towards vaginal epitheliocytes and human red cells, from the initial strain of Lactobacillus acidophilus taken from the vagina of a healthy adult woman, the strains being deposited at the Central Museum of Industrial Microorganisms of the National Institute for Genetic Research and Selection of Industrial Microorganisms. Medicaments.
Patent FR-2623556-A1 (FR)
Title: Translucent complex composed of at least two glazing sheets combining the functions of insulation and solar protection
IPC: B32B17/10
Filed: 1987-11-20
Abstract: New device for insulating double glazing. The new device is characterised in that it forms a compact product consisting of a grid of fine reflecting and sloping strips 3 inserted between the sheets of glass 1 and 2 in insulating glazing sheets sealed into the air gap or included in a transparent resin. The direction of the strips confers on the device a solar factor according to the angle of incident radiation, while permitting light to pass. The new device improves the characteristics of double glazing/blind assemblies: ease of maintenance, thermal insulation, implementation, durability. Application to insulating glazing sheets, internal partitions, heating panels.
Patent FR-2623933-A1 (FR)
Title: Electrical-insulation and/or galvanic-isolation device for a nut-and-bolt system
Inventor: MONVOISIN JACQUES
IPC: F16B5/02
Filed: 1987-11-26
Abstract: The subject of the invention is a device 5 for electrical insulation and/or galvanic isolation between a nut-and-bolt 3, 4 system and the components 1, 2 which it joins together. This device 5 is made from a single piece (which makes it easy to mount) of a flexible electrically-insulating material and includes parts 6, 7, 8 inserted between all the surfaces of the nut-and-bolt 3, 4 system which are located facing the components 1, 2 and these components 1, 2. The device according to the invention can be applied in any technical field.
Patent WO-8902430-A1 (WO)
Inventor: NGUYEN DAT XUONG
IPC: A61K31/14
Filed: 1988-09-19
Abstract: L'invention a pour object le diéthyl-dithio-carbamate de choline ayant la formule développée (I), ainsi que son procédé de préparation à partir du chlorure de choline et du diéthyl-dithio-carbamate de sodium tri-hydraté. Ce composé est utile dans le traitement des maladies dégénératives cérébrales.
Patent WO-8904494-A1 (WO)
Inventor: AUBERT GUY
IPC: G01R33/20
Filed: 1988-11-10
Abstract: L'invention a principalement pour objet un dispositif d'imagerie RMN, un procédé de correction d'inhomogénéité et un procédé de réalisation d'aimants mis en oeuvre dans le dispositif. L'invention consiste en la correction d'inhomogénéité de champs magnétiques en utilisant des ouvertures (102) à section carrée ou polygonale dans la périphérie d'un aimant. Dans les ouvertures (102) on loge des aimants permanents (8) nécessaires à l'obtention de la correction désirée. Ainsi, l'orientation des aimants permanents (8) ne peut prendre que quelques valeurs ce qui simplifie les calculs de détermination des positions des aimants destinés à corriger l'inhomogénéité du champ magnétique. L'invention s'applique à la modification d'un champ magnétique. L'invention s'applique principalement à la correction d'inhomogénéité d'un champ magnétique d'un aimant utilisé en imagerie par résonance magnétique nucléaire.
Patent FR-2627389-A1 (FR)
Inventor: JOURDAN-LAFORTE ERIC
IPC: A01N59/00
Filed: 1988-02-19
Abstract: The disinfectant compositions described are a combination of a formaldehyde and hydrogen peroxide generator. They can be used for terminal disinfection in hospital environments, for disinfecting medical, dental, veterinary and thermo-sensitive instruments and equipment by immersion, for disinfecting household linen and hospital linen and for spray-disinfection of contaminated areas.
Patent FR-2630871-A1 (FR)
Inventor: BIHAN HERVE LE
IPC: H04B17/00
Filed: 1988-04-29
Abstract: According to this method, on transmission, the signal S1(t) from a low-rate digital channel is added to that S2(t) from a high-rate digital channel by over-modulation or superposition means (13) which generate a composite transmission signal S(t). On reception, the signal S2(t) from the high-rate digital channel is recovered thanks to regeneration means (24) operating on the composite transmission signal S(t). The signal S1(t) from the low-rate digital transmission channel is recovered thanks to means (25) for subtracting the composite transmission signal S(t), previously filtered by a first low-pass filter (31), and the regenerated signal S2(t) from the high-rate digital channel, previously filtered by a second low-pass filter (33).
Patent FR-2631000-A1 (FR)
Title: Package for food product with exudate
Inventor: TUTIN GERARD
IPC: B65D81/26
Filed: 1988-05-05
Abstract: The package, which can be used in particular for transporting cream cheeses, comprises a bottom and a lid delimiting the volume for receiving the food product to be transported. The bottom 10 is made of a material shaped in such as way as to have grooves for collecting exudate, contains a support panel 17 for the product and is held in the lid 12 by a cover 30 welded to the latter.
Patent FR-2631988-A1 (FR)
Title: Improvements to a washing machine or dryer having automatic determination of the washing load introduced into the machine
Inventor: ROUX JEAN-LUC
IPC: D06F33/32
Filed: 1988-05-31
Abstract: Washing machine or dryer comprising a means of determining the moment of inertia of the laundry in relation to the axis of rotation of this drum. The motor for driving the drum being of the universal type, it is supplied with alternating current and its speed V is determined by a phase-control signal by virtue of a microprocessor which determines the moment of inertia from the value ( theta ) of the phase angle. The microprocessor commands the rotation of the drum with a first acceleration between two speeds V1 and V2 and sums the periodically measured values theta 1 of the phase angle and then commands a second acceleration ramp 21 between the same speeds with a different acceleration and sums the periodically determined phase angles theta 2. Next, the microprocessor calculates the difference between the two sums.
Patent FR-2617832-A1 (FR)
Title: Four de spherulisation et procede de fabrication de perles de verre
Inventor: NEUSY HUBERT
IPC: C03B19/10
Filed: 1988-06-20
Abstract: L'invention se rapporte à la fabrication de perles de verre dans un four de sphérulisation comprenant des moyens pour délivrer de la matière première sous forme de particules, une zone de sphérulisation dans laquelle les particules de matière première peuvent être chauffées et converties en perles de verre. Lesdits moyens d'alimentation comprennent un réservoir 4 à lit fluidisé, le réservoir étant pourvu d'au moins un orifice de sortie par débordement 51 par lequel des particules fluidisées peuvent s'écouler par gravité pour être délivrée à la zone de sphérulisation d'une chambre de combustion 2. La présente invention s'applique particulièrement à la production économique de microsphères ou de microbilles vitreuses.
Patent FR-2633580-A1 (FR)
Inventor: VIGNAUD JEAN-CLAUDE
IPC: B61D17/08
Filed: 1988-07-01
Abstract: Device for opening and closing a lower skirt (3) of a vehicle body in order to have access to a compartment for storing equipment. It comprises a) a first flat bar (4) articulated at one end on a first fixed pin (9) and at the other end on a first pin (10) integrally connected to the bottom of the skirt (3), b) a second flat bar (5) articulated on a second fixed pin (11) inside the compartment, and on a second pin (12) integrally connected to the bottom of the skirt (3), c) a spring (6) fixed at one end to the centre of the first flat bar (4) and at the other end to the centre of the second flat bar (5), d) a first cam (14) ensuring, together with a lock, the retaining of the skirt (3) in the lower closed position, and e) a second cam (17) for retaining the skirt (3) in the upper open position.