baber/WOPTO huggingface dataset:
Patent SK-62097-A3 (SK)
Title: Guard of a car door lock blocking actuating device
Inventor: PORUBCAN ROBERT
IPC: E05B/
Filed: 1997-05-16
Abstract: Protector of controller for blocking a car door lock consists of at least one protecting element which consists of the basic part (2) and from protecting part (3). The basic part (2) of the protecting element is adjusted for the solid connection with the frame of car door (7) and protecting part (3) of the protecting element or at least its portion is dimensionally adjusted for manipulation of controller for blocking the car door lock (1) minimum from two opposite sides, the wall (4) of protecting element contains a plane adjusted for adjacent location of protecting element to circumference of controller for blocking the car door lock (1). The wall (4) of protecting element has the height equal or greater than the height of protruding portion of controller for blocking the car door lock (1) in a locking position or than the height of protruding non-narrowing portion of controller for blocking the car door lock (1) in a locked position.
Patent CZ-146892-A3 (CZ)
Inventor: HAVLAS JAROSLAV
IPC: G01N23/05
Filed: 1992-05-15
Abstract: Dopravní systém tvoří pojezdové saně (1) s vestavěnými
čelními izolačními bloky (3), které v krajních polohách vymezují
vnitřní prostor měřící komory (4) pro umístěníměřeného
předmětu (7). Pojezdové saně (1), v nichž je trvale
zabudován kalibrační etalon (2) umístěný v pouzdře (12),
snímají smykem měřené předměty (7) střídavě z levého a
pravého pasového dopravníku (8, 9). Zdroje (5) neutronového
zařízení a detektory (6) ionizujícího zářeníjsou uspořádány
ze všech čtyř stran měřící komory (4).
Patent CZ-318692-A3 (CZ)
Title: Process of working-up porous, lumpy objects, particularly shaped bodies from cellular concrete within an autoclave
Inventor: WOSNITZA FRANZ DR ING
IPC: B01J3/04
Filed: 1992-10-21
Abstract: The invention relates to a method for autoclaving porous, lumpy materials by means of pressurised steam, the autoclaving process comprising, successively, a steam-operated heating phase, a holding phase and an expansion phase for pressure and temperature, the holding phase comprising a drying process in which the autoclave, going beyond compensating for heat losses and being set to a temperature above the evaporation temperature of the water, is heated indirectly and the material is dried by a controlled blowing-off of steam-containing heating medium from the interior of the autoclave. In order to obtain as dry a product as possible using as little energy as possible, it is provided that the drying process essentially extends over the entire holding phase, one or more autoclaves in the holding phase being supplied with sufficient heat for the steam necessary for a heating phase to be blown off and, after previous intermediate storage if appropriate, used to operate a heating phase. <IMAGE>
Patent CZ-385989-A3 (CZ)
Title: Apparatus for automatic removal of inserted and released weft on looms
Inventor: VELECHOVSKY PETR ING
IPC: D03D51/34
Filed: 1989-06-27
Abstract: The invention refers to a device for automatic removal of mispicked weft on weaving machines ensuring that the mispicked weft is removed reliably. In principle, it consists of a hook (2) fixed to a shaft and equipped with a holding nozzle (6), of a stationary drive disc (7), and of an axially sliding driven disc (8). The holding nozzle is made as an outlet of a tube fixed to the hook and connected to a source (5) of pressurized air. The shaft (3) to which is fixed the hook is connected with a servomotor (11). The drive disc and the driven disc are situated in front of the hook, and the whole device is seated on a base plate (1) over the woven fabric.
Patent CZ-414191-A3 (CZ)
Title: Human interleukin-4
Inventor: LEE FRANK
IPC: C12N15/11
Filed: 1991-12-30
Abstract: Antibodies to mammalian Interleukin-4 and muteins are provided, especially to native human IL-4s, as well as peptides useful as antigens in their production. Nucleic acids are disclosed which are capable of coding for the mammalian IL-4s and their muteins.
Patent CZ-106597-A3 (CZ)
Title: Process of utilizing heat of incompletely expanded hot gaseous medium and apparatus for making the same
Inventor: HERMAN ZDENEK
IPC: F02G5/02
Filed: 1997-04-08
Abstract: The present invention is characterized by injection of condensate in a partially expanded hot gaseous medium. The condensate is evaporated and the obtained mixture of superheated steam and the partially expanded hot gaseous medium is further expanded, whereupon the completely expanded steam-gas mixture is cooled and moist steam contained in the completely expanded steam-gas mixture formed by evaporation of condensate and cooling down the superheated steam contained in combustion products as hydrogen oxide is partially or completely condensed and the formed condensate separated from gaseous components is then injected in the incompletely expanded hot gaseous medium and in the completely expanded steam-gas mixture. The apparatus for making the above described process is formed by a hot gaseous medium source (1) such as internal combustion engine and an expansion machine (2) such as expansion turbine, between which there is performed an injection space (4) for injection condensate by an injection valve (5). In the expansion machine (2) exhaust manifold (7) there is introduced a condensate trap (8), whose discharge piping (9) is connected to an injection pump (6).
Patent CZ-119897-A3 (CZ)
Title: Apolipoprotein b synthesis inhibitors
Inventor: HEERES JAN
IPC: C07D405/12
Filed: 1995-10-19
Abstract: The present invention provides novel compounds of formula (I), the N-oxides, the stereochemically isomeric forms thereof, and the pharmaceutically acceptable acid addition salts thereof, wherein A and B taken together form a bivalent radical of formula: -N=CH- (a), -CH=N- (b), -CH2-CH2- (c), -CH=CH- (d), -C(=O)-CH2- (e), -CH2-C(=O)- (f); R<1> is hydrogen, C1-6alkyl, or halo; R<2> is hydrogen or halo; R<3> is hydrogen; C1-8alkyl; C3-6cycloalkyl or C1-8 alkyl substituted  with hydroxy, oxo, C3-6cycloalkyl or aryl. Het is five- or six membered optionally substituted heterocyclic ring. The use as a medicine, especially as a lipid lowering agent is disclosed as well as pharmaceutical compositions and processes for preparing compounds and compositions.
Patent CZ-131198-A3 (CZ)
Title: Method of internal cleaning centrifugal rotor, cleaning equipment for this purpose and centrifugal separator containing thereof
Inventor: BORGSTROM LEONARD
IPC: B04B1/08
Filed: 1996-11-05
Abstract: In a centrifugal rotor there is an inlet chamber (7), a separation chamber (8) and an outlet chamber (10), which chambers are coupled in series. A stationary outlet member (16) is arranged to remove from a predetermined level in the outlet chamber (10) separated liquid during normal operation of the centrifugal rotor. For internal cleaning of the centrifugal rotor there is arranged within the oultet chamber (10) inside said predetermined radial level a preferably stationary reconducting member (26) that is dimensioned to accomplish a recirculation flow of cleaning liquid through said chambers (7, 8, 10) in the centrifugal rotor, which circulation flow is substantially larger than the flow of liquid which during normal operation of the centrifugal rotor passes through these chambers.
Patent CZ-141195-A3 (CZ)
Inventor: DVORAK MILOS
IPC: D04B35/28
Filed: 1995-06-01
Abstract: Mazací zařízení, zejména pro mazání okrouhlého pletacího
stroje obsahuje nádobu (1) pro olej, kde je uspořádán
nejméně jeden válec (2) s pístem (3) pro vytlačování oleje k
mazanému místu. K tomuto pístu (3) je připevněna tyč (4),
jejíž druhý konec dosedá do kuželovitého vývrtu (71) na
čele pneumatického pístu (7) v pneumatickém válci (8).
Pneumatický válec (8) je osově pohyblivě nastavitelný ve
víku nádoby (1) pro olej.
Patent CZ-167695-A3 (CZ)
Title: Ventilation plant, particularly for cow-sheds
Inventor: VENG NIELS SKOV
IPC: A01K1/00
Filed: 1994-01-03
Abstract: It is known that in ventilation systems having a plurality of air intake valves it is possible to arrange for a selective opening of valve plates in these valves between closed and fully open position, such that the opening is adjusted to the requirements. The selective opening is based on the valve plates being drawn to open through a direct pull and through a 2:1 pulley block pull, respectively. According to the invention it is possible to arrange for other transfer ratios, viz. in that a part of the opening of selected valves is effected with a transfer ratio of 2:1, while later during the opening this ratio is changed into 1:1 by way of an abutment (28) on the pulling wire (10) engaging the wire eye (12) on the valve plate (4) which, otherwise, holds the wire in a sliding manner. Hereby the total opening characteristic of the valves can be determined in a widely optimized manner in the single stable.
Patent CZ-177595-A3 (CZ)
Title: Combined profile
Inventor: WARNECKE HANS-JURGEN
IPC: F16J15/10
Filed: 1994-11-09
Abstract: The composite section (1) has an adhesive tape (2) that is durably bonded to a sealing strip (3). The adhesive tape (2) has a flexible substrate (4) of foam, the first surface (5) of which has a first adhesive layer (6) covered with a pull-off liner (7). A second surface (8) of the substrate (4) opposite the first surface (5) is thermally melted onto a facing surface (9) of the sealing strip (3) and is durably welded with the likewise heated facing surface (9) of the sealing strip (3) to form the composite section (1).
Patent CZ-201264-A3 (CZ)
Inventor: MIKA MARTIN
IPC: C03C3/095
Filed: 2012-01-30
Abstract: Popisuje se optické luminiscencní sodnohlinitokremicité sklo, které obsahuje v % mol.: 60 az 80 SiO.sub.2.n.; 10 az 20 Na.sub.2.n.O; 0,5 az 10 Al.sub.2.n.O.sub.3.n.; 0 az 20 MO, kde MO predstavuje alespon jeden z dvojmocných oxidu kovu, vybraných ze skupiny MgO, CaO, ZnO; 0 az 10 B.sub.2.n.O.sub.3.n.. Suma oxidu SiO.sub.2.n.+ Na.sub.2.n.O + Al.sub.2.n.O.sub.3.n.= 70,5 az 95 % mol. Suma oxidu Al.sub.2.n.O.sub.3.n.a/nebo B.sub.2.n.O.sub.3.n.= 0,5 az 20 % mol. Dále sklo obsahuje alespon jeden oxid kovu, vybraný ze skupiny oxidu kovu Er .sub.2.n.O.sub.3.n., Yb.sub.2.n.O.sub.3.n., Ho.sub.2.n.O.sub.3.n., Dy.sub.2.n.O.sub.3.n., Tm.sub.2.n.O.sub.3.n., Nd.sub.2.n.O.sub.3.n., Pr.sub.2.n.O.sub.3.n., Bi.sub.2.n.O.sub.3.n., Cu.sub.2.n.O, CuO, Cr.sub.2.n.O.sub.3.n., CrO.sub.3.n.a NiO v rozmezí 0,001 az 8 % mol. Toto sklo vykazuje: absorpci v UV a/nebo ve VIS a/nebo v IC oblastech vlnových délek a soucasne fotoluminiscenci ve VIS a/nebo IC oblastech vlnových délek; index lomu 1,49 az 1,56; a strední optickou bazicitu v intervalu 0,40 az 0,65. Sklo muze obsahovat jeden oxid kovu, vybraný ze skupiny lanthanoidu Er.sub.2.n.O.sub.3.n., Yb.sub.2.n.O.sub.3.n., Ho.sub.2.n.O.sub.3.n., Dy.sub.2.n.O.sub.3.n., Tm.sub.2.n.O.sub.3.n., Nd.sub.2.n.O.sub.3.n.a Pr.sub.2.n.O.sub.3.n., v mnozství 0,05 az 8 % mol. Je také výhodné, kdyz sklo obsahuje alespon jeden oxid kovu, vybraný ze skupiny Bi.sub.2.n.O.sub.3.n., Cu.sub.2.n.O, CuO, Cr.sub.2.n.O.sub.3.n., CrO.sub.3.n.a NiO v rozmezí 0,001 az 5,0 % mol. Optické luminiscencní sodnohlinitokremicité sklo také muze obsahovat alespon jeden oxid, vybraný ze skupiny Er.sub.2.n.O.sub.3.n., Yb.sub.2.n.O.sub.3.n., Ho.sub.2.n.O.sub.3
Patent CZ-201554-A3 (CZ)
Inventor: STARZ JOSEF
IPC: E02D29/14
Filed: 2015-01-29
Abstract: Výškově nastavitelný a naklápěcí kanalizační poklop pro osazení na svislé kanalizační šachtici sestává z víka a rámu. Rám je tvořen patním dílem (12), který je pevně uložen na horním okraji šachtice. Dále je tvořen mezikusem (11) a hlavou (10) naklápěcího rámu, přičemž mezikus (11) je otočně uložen na patním dílu (12) a hlava (10) je otočně uložena na mezikusu (11). Stykové plochy mezi mezikusem (11) a hlavou (10) naklápěcího rámu mají úkos 4.degree.. Ve vnitřním vybrání (16) hlavy (10) je uložena dělená matice (2) s vnitřním pilovým závitem (4), který je v záběru s vnějším pilovým závitem (3) vytvořeným na nákružku víka (1).
Patent CZ-202035-A3 (CZ)
Inventor: STEDINA JAKUB
IPC: G02C5/08
Filed: 2020-01-24
Abstract: Řešení se týká délkově nastavitelného spojovacího můstku obrub očnic brýlí zhotovovaných v „terénu“ a je tvořen obrubami očnic (1), kde jedna z nich je opatřena přijímacím segmentem (2) a druhá zasouvacím segmentem (3), pro zasunutí do přijímacího segmentu (2), přičemž oba segmenty (2, 3) jsou na svých vnější stěnách opatřeny zářezy (6) pro snazší zkracování obou segmentů (2, 3) za účelem srovnání středu dioptrických čoček se zorničkami uživatele brýlí.
Patent CZ-210999-A3 (CZ)
Inventor: MAURIN V RONIGUE
IPC: A61K8/00
Filed: 1999-06-11
Abstract: Kosmetickýkondicionérový adetergentní prostředekpro
keratinové látky obsahující ve vodnímprostředí: ZA/ alespoňjeden
netěkavýrostlinný olej, ZB/ alespoňjedno aniontové povrchově
aktivní činidlo sulfátového typu, /Galespoňjedno neiontové
povrchově aktivní činidlo alkylpolyglikosidového typu, lety
hmotnostní porna·IBIIIGje nižší nebo se rovná 2. Použití pro
současné mytí apéči keratinových materiálů, zvláště vlasů.
Patent CZ-305395-A3 (CZ)
Title: Method of automatic start of flushing
Inventor: RUMP HANS
IPC: E03C/
Filed: 1995-03-18
Abstract: The flushing method uses a valve (5) in the water feed pipe (4), which is operated by an electronic control and analysis unit (14). The feed pipe is also fitted with a water turbine (6) which drives a generator (7). The electrical energy produced by the generator is stored in a capacitor (15). The control unit monitors the state of charge of the capacitor, and when its voltage falls below a predetermined value, the valve is opened for an adjustable period. The system can also be made to operate at fixed intervals, regardless of the charge on the capacitor. <IMAGE>
Patent CZ-309995-A3 (CZ)
Title: Detergent
Inventor: BOSKAMP JELLES VINCENT
IPC: C11D17/06
Filed: 1994-04-26
Abstract: A particulate detergent composition which is not the direct product of a spray-drying process has a high bulk density ( >/= 650 g/l) and contains a surfactant system consisting essentially of ethoxylated nonionic surfactant and optional primary alcohol sulphate, zeolite builder, and a citrate salt. Delivery and dissolution in the wash are improved by the choice of ethoxylated nonionic surfactant having an average degree of ethoxylation of 5.2 to 8.0, preferably about 7.
Patent CZ-317494-A3 (CZ)
Title: Oligomeric esters of phosphoric acid, carrying hydroxyalkoxyl groups, process of their preparation and use
Inventor: SICKEN MARTIN DR
IPC: C07F9/40
Filed: 1994-12-15
Abstract: The invention relates to mixtures of oligomeric phosphoric acid esters bearing hydroxyalkoxy groups, of the formula I <IMAGE> wherein q is an average chain length of 0.5 to 10, R1 is a hydroxyl-containing radical of the formula IIa, R2 is a radical of the formula III <IMAGE> R3 is a radical of the formula IIb, R4 = R1 or R3; R5, R6 and R7  are an H atom or an alkyl radical having 1 to 6 C atoms, m = 0 to 4 and n = 1 to 4. Additionally, the invention relates to a process for the preparation of the mixtures and their use as reactive flame retardants in polyurethane foams.
Patent CZ-328398-A3 (CZ)
Title: Seat, particularly for vehicles
Inventor: PFAU KARL-HEINZ
IPC: A47C7/26
Filed: 1997-05-06
Abstract: A seat (10) has a sitting surface (12) with upholstery (11) having lateral supporting cushioning for the user. The seat includes a frame (14) stabilising it, the side sections (14a) of which project into the side cushioning (13). On at least one cross-member (14b) connecting the side sections (14a) of the frame (14), an additional stiffener (15) stiffening at least the central region of the cross-member (14b) can be secured by at least two connectors movable along the cross-member.
Patent CZ-398897-A3 (CZ)
Title: Binding agent composition comprising a polymer with a strongly activated carbanionic functional groups and a cross-linking agent
Inventor: HENDRIKS JOHANNES WILHELMUS MA
IPC: C09D167/08
Filed: 1996-06-05
Abstract: The invention relates to a binder composition comprising a strongly activated carbanion-functional polymer and a cross-linker. The cross-linker contains aldehyde groups and the polymer is an alkyd resin or a polyester resin. The carbon-functional groups are acetoacetate groups, malonate groups, acetonate groups or mixtures thereof. Preferably, the polymer is an alkyd resin having said carbanion-functional groups and having a hydroxyl number between 40 and 70 mg of KOH/gram of resin and an acid number between 15 and 25 mg of KOH/gram of resin.
Patent ES-193604-A3 (ES)
Title: Un aparato de mudada para continuas de anillos y similares
Filed: 1950-06-23
Abstract: El método de mudar contínuas de anillos para hilar y torcer que consiste en levantar una bobina llena de modo que se haga que algo del hilo de la misma se desenrolla por encima de la extremidad inferior de la bobina a encima del huso coger a recoger el hilo cuando se desenrolla de este modo y limitar con ello la cantidad de hilo que se arrolla sobre el huso de modo que este hilo sea llevado fácilmente con la bobina llena en la mudada inmediatamente siguiente y coger y cortar luego la porción recogida del hilo de tal modo que se retenga la extremidad que conduce al huso y desde él al cursor y se suelte la extremidad que conduce a la bobina.
Patent WO-8807869-A3 (WO)
Title: ANTICORPS ANTI-INTERFERON gamma ET LEUR APPLICATION THERAPEUTIQUE
Inventor: BILLIAU ALFONS JOSEF DENIS ALI
IPC: A61K38/00
Filed: 1988-04-18
Abstract: Immunoglobuline ayant une activité d'anticorps neutralisant dressée contre l'interféron gamma se trouvant chez l'homme et l'animal, destinée à être utilisée à titre d'agent thérapeutique, de substance active pour inhiber des réactions inflammatoires, empêcher ou inhiber la malaria cérébrale, et comme préparation médicale ou vétérinaire comprenant un excipient acceptable d'immunoglobuline.
Patent BE-1000874-A3 (BE)
Title: Procede de refroidissement des fours rotatifs.
Inventor: MONNI AARNE VEIKKO
IPC: F27B7/38
Filed: 1988-08-10
Granted: 1989-05-02
Abstract: Procédé de refroidissement d'un four rotatif par un agent de refroidissement liquide, caractérisé en ce que l'agent de refroidissement liquide est étalé sous forme d'une nappe liquide essentiellement uniforme, grace à des plaques formant chicanes (6) d'un élément de distribution, ces plaques formant chicanes (6) étant installées au-dessus du four rotatif (1) essentiellement à la meme hauteur par rapport à la surface du four rotatif (1), et/ou grace à des conduits (9) comportant des buses, placés  essentiellement à la meme hauteur par rapport à la surface du four rotatif.
Patent BE-1001706-A3 (BE)
Title: Forme d'administration solide, a desagregation rapide, du diclofenac.
IPC: A61K9/46
Filed: 1989-03-23
Granted: 1990-02-13
Abstract: Forme d'administration solide à désagrégation rapide, caractérisée en ce qu'elle contient du Diclofenac finement broyé portant un revêtement perméable et gonflable à l'eau, ou un sel correspondant acceptable pour l'usage pharmaceutique et portant un tel revêtement, et des produits auxiliaires acceptables pour l'usage pharmaceutique.
Patent BE-1001707-A3 (BE)
Title: Compositions adhesives.
IPC: C08F30/02
Filed: 1989-05-03
Granted: 1990-02-13
Abstract: Composition adhésive liquide à composant unique et durcissable en lumière visible, comprenant (a) 2 à 20 parties d'au moins un ester de formule CH2=C(R1).CO.O.R2.OP(O)(OH)2 où R1 est un atome d'hydrogène ou un radical méthyle et R2 est -CH2-CH2, CH2-CH(CH3)- ou -CH(CH3)-CH2-, et (b) 98 à 80 parties d'au moins un monomère éthyléniquement insaturé copolymérisable avec l'ester, (c) 1 à 9% en poids d'une charge inorganique fine et un catalyseur activé par la lumière visible.
Patent BE-1006513-A3 (BE)
Title: Sealing system, particularly for a window opening
IPC: E06B9/54
Filed: 1993-01-05
Granted: 1994-10-04
Abstract: Sealing system particularly for a window opening and, in particular, for awindow opening (1) provided with a closure device (2) with an opening part(3), including two components (4 and 4') for sealing the opening which are ofdifferent types, and which each have a surface large enough to seal thetotality of the opening, these components being arranged in two parallelcompartments (7, 7'), placed along two opposite edges of the opening, in sucha way that their free ends (8 and 8') move in the opposite direction eitherto seal the opening (1), or to disengage it, means (9) being provided toguide and hold each of the edges (10) of the sealing components (4, 4') andmeans (11) arranged on the components (4,4') in such a way as to allow themto be immobilised in the chosen partially or fully sealed position.<IMAGE>
Patent BE-1007383-A3 (BE)
Title: Ventilation window for a greenhouse and method for mounting its plastic filmtaut across the window frame
IPC: A01G9/24
Filed: 1993-08-31
Granted: 1995-05-30
Abstract: The invention relates to a ventilation window structure characterised by thefact that close to the ridge formed by two ribs (1) of the greenhouse, alongboth sides of the transfer ridge pipe (2) on hinged mounted ventilationwindows (4 and 5), there is a guide plate (9) always fixed in relation to arib (10). This guide plate shows a split (10) in which a journal (11)belonging to a ventilation window is adjustably supported on bearings.<IMAGE>
Patent BE-1010135-A3 (BE)
Title: Werkwijze voor het verwijderen van onreinheden uit groenten, fruit en dergelijke en inrichting die deze werkwijze toepast.
IPC: A23N12/02
Filed: 1996-04-10
Granted: 1998-01-06
Abstract: Werkwijze voor het verwijderen van onreinheden uit groenten, fruit en dergelijke en inrichting die deze werkwijze toepast, daardoor gekenmerkt dat de afscheiding van de delen met een verschillend gewicht bekomen wordt door de te reinigen produkten in een vloeistofbad aan te brengen waardoor een natuurlijke afscheiding wordt bekomen doordat de lichtere delen drijven en de zwaardere zinken en het enerzijds en anderzijds afzonderlijk afvoeren van de afgescheiden delen.
Patent BE-1010140-A3 (BE)
Title: Unit for turning over items of post
Inventor: DE BEULE STEFAAN DIANA JOZEF
IPC: B07C1/18
Filed: 1996-10-04
Granted: 1998-01-06
Abstract: A unit for rotating the horizontal positioning of flat postal items such as letters in a post-processing machine. The unit comprises a first (CB1) and second (CB2) conveyor belt which operate in opposite directions, and a system of poles (CA, SM) with two arms that are adapted to receive the letter from the first belt and to push it against the second belt by rotating the arms, whereby the letter is 'flipped'. The unit also comprises detection devices (PH) which are adapted for the detection of the front and the back edges of the letters and a guiding device for the operation of the pole system in order to press the letter against the second belt, so that it is 'reversed' with respect to the imaginary vertical axis of symmetry. The reversal takes place taking into account the length of the letter. This way, the throughput of the machine is increased as it can work in a cyclic manner, without having to take into account a constant distance between letters, which is the length of the longest letter that can be processed plus a minimum distance that is required for mechanical exchanges, for example.<IMAGE>
Patent BE-1010153-A3 (BE)
Title: Platform adapting to rungs and on which any person may work in safety
IPC: E06C7/16
Filed: 1996-11-29
Granted: 1998-01-06
Abstract: Platform adapting to rungs and on which any person may work in safety. A metal frame (0.0), composed of a hollow square metal frame (4), metal angle brackets (3) and an adjustment system for any rung formed of a fixed part (4) and a mobile part (4.5), onto which are welded hooks (1.2.R) adapting onto two rungs, supports either a multiplex floor (0.1), or a floor covered with a thickness of rubber (0.2), or wire netting (0.3) according to the user. To prevent the frame from bending under the weight of the person on the platform, two reinforcements (4.1) are provided. The system composed of a fixed part (4) and a mobile part (4.5) is tilted to keep the platform level relative to the ladder.<IMAGE>