baber/WOPTO huggingface dataset:
Patent UA-76560-C2 (UA)
Title: Protected dielectric optical fiber cable
Inventor: ZOLOTARIOV VOLODYMYR MYKHAILOV
IPC: G02B6/44
Filed: 2004-07-08
Abstract: The proposed protected dielectric optical fiber cable is distinctive by that the cable contains polymeric film, polymeric sheath, glass-fiber coating,and water-proof sheath, which are arranged between the fiber lightguides and the outside coating of the cable. The gaps between the fiber lightguides and the sheaths of the cable are filled with hydrophobic material. The proposed design of the cable allows the cable to be laid near high-voltage power cables.
Patent UA-79269-C2 (UA)
Title: Facility for assembly for welding of canopy frame of aircraft
Inventor: KOSMIN YURII VIKTOROVYCH
IPC: B23K37/04
Filed: 2004-09-20
Abstract: The invention concerns facilities for assembly for welding of the articles in the shape of frame structures of complex three-dimensional form. A facility for assembly for welding of the canopy frame of aircraft contains vertical and horizontal supports installed on the frame, clamps of transverse and longitudinal elements of article and location elements. The frame consists of two beams connected together with the help of channel bars. The location elements are made in the form of upper, lower and lateral bench-marks. On the areas of upper and lower bench-marks one vertical and two horizontal supports are securely fastened, which are made as convex cradles. The invention ensures the increase of set of products, which are assembled in this device, and increase of maintainability of the facility as a whole, and also the provision of high accuracy of assembly for welding of the articles, which have complex three-dimensional geometric form.
Patent UA-76855-C2 (UA)
Title: Blanket
IPC: A47G9/10
Filed: 2002-04-12
Abstract: Disclosed is a blanket (1) of the conventional type, particularly for beds, comprising at least one flexible layer (2) which is made of a light insulating material. The inventive blanket is configured such that said layer (2) thereof keeps the occupant warm in bed. The aim of the invention is to improve humidity regulation and evacuate excess heat and the moisture given off by the body. Said aim is achieved by providing said layer (2) with ventilating openings (3).
Patent DE-2914220-C3 (DE)
IPC: B63B41/00
Filed: 1979-04-09
Granted: 1983-11-03
Abstract: 1. Drop keel arrangement for a wind-surfing device with a drop keel base (4) and a drop keel (5) guided therein, wherein a bearing (24) for a spigot (7, 8) projecting at the drop keel (5) is provided in the side walls (11, 12) of the drop keel box (4) and the length (L) of the slot opening (17) of the drop keel box (4) is greater than the width (B) of the drop keel (5), characterised thereby, that the side walls (11, 12) of the drop keel box (4) have at least one further bearing (24) displaced relative to the first in longitudinal direction and the spigot (7, 8) is selectably insertable into one of the bearings (24).
Patent DE-4033599-C3 (DE)
Inventor: BONNET OLIVIER
IPC: B29B17/00
Filed: 1990-10-23
Granted: 1998-09-17
Abstract: Device for the comminution of used rubber, comprising a sloping precooling tunnel (11), which contains a conveying device (27) and can be charged via a feeding shaft (13), a main cooling tunnel (12), which is connected to the precooling tunnel (11) by a connecting shaft (31), is at least partially filled with a coolant (38) and is provided with a conveying device (41), and a comminution means (46), which is arranged downstream of the main cooling tunnel (12). The main cooling tunnel (12) and the precooling tunnel (11) are connected to each other via at least one gasification tube (48), carrying a coolant. <IMAGE>
Patent AU-2020102685-C4 (AU)
Title: Use of pimobendan for the reduction of heart size and/or the delay of onset of clinical symptoms in patients with asymptomatic heart failure due to mitral valve disease
Inventor: SCHUMMER CHRISTOPH MATTHIAS
IPC: A61K31/501
Filed: 2020-10-12
Granted: 2022-03-03
Abstract: The invention relates to pimobendan for use in a method of reducing the heart size and/or delaying the onset of 
clinical symptoms in a patient suffering from asymptomatic (occult, preclinical) heart failure, preferably 
congestive heart failure, due to mitral valve disease (MVD), and/or delaying the onset of heart failure, preferably 
congestive heart failure, in a patient suffering from asymptomatic (occult, preclinical) heart failure, preferably 
congestive heart failure, due to mitral valve disease (MVD), wherein the patient is preferably a mammal, more 
preferably a human, a dog, a cat or a horse, and most preferably a dog.
Patent DE-4102863-C5 (DE)
Title: Kugelgelenk für Kraftfahrzeuge
Inventor: BUHL REINHARD
IPC: B60G7/02
Filed: 1991-01-31
Granted: 2006-01-26
Abstract: Kugelgelenk
für Fahrwerksteile
in Kraftfahrzeugen, bei dem:  – ein Gelenkzapfen (1) mit
einer Gelenkkugel (2) mittels einer Lagerschale (4) aus Kunststoff
in einem topfartig ausgebildeten Gehäuse (3) gelagert und durch
eine Öffnung (6)
aus dem auf der dieser Öffnung
gegenüberliegenden Gehäuseseite
durch einen Deckel (7) verschlossenen Gehäuse (3) herausgeführt ist,  – das Gehäuse (3)
an seinem Außenumfang
von einer Elastomerhülse
(9) umschlossen und mit dieser axial beweglich in eine starre Außenbuchse
(10) eingesetzt ist,  – Radialflächen am
Gehäuse
(3) sowie an der Außenbuchse
(10) die axiale Bewegung des Gehäuses
gegenüber
der Außenbuchse
begenzen,  – die
Radialflächen
am Gehäuse
durch die beiden Seiten eines mit dem Gehäuse (3) fest verbundenen Flansches gebildet
sind,  – der
mit einem axialen Bewegungsraum zwischen den Radialflächen der
Außenbuchse
(10) eingreifende Flansch als Flanschring (15) ausgebildet ist,
der mit dem Gehäuse
(3) etwa in der Ebene des Deckels (7) und gemeinsam...
Patent DE-4321013-C5 (DE)
Title: Gasverdichter
Inventor: SCHLOSSARCZYK HEINRICH
IPC: F04B49/16
Filed: 1993-06-24
Granted: 2014-07-17
Abstract: Zwischen Lastlauf und Leerlauf umstellbarer Gasverdichter mit einem Verdichtungsraum (20), einem über wenigstens ein Ansaugventil (4, 21; 4, 22) mit dem Verdichtungsraum (20) verbindbaren Ansaugraum (8), einem über wenigstens ein Auslassventil (17, 18) mit dem Verdichtungsraum (20) verbindbaren Auslassraum (15), einem über ein Zusatzventil (10, 21; 20, 22) mit dem Verdichtungsraum (20) verbindbaren Zusatzraum (7), wobei das Zusatzventil (10, 21; 10, 22) so ausgebildet und so betätigbar ist, dass der Verdichtungsraum (20) im Leerlaufbetrieb des Gasverdichters mit dem Zusatzraum (7) verbunden ist, dadurch gekennzeichnet, dass der Gasverdichter mit wenigstens einem weiteren Verdichtungsraum (20'), dessen Größe sich gegenläufig zu der Größe des Verdichtungsraums (20) ändert und der über wenigstens ein weiteres Ansaugventil (4, 31) mit dem Ansaugraum (8) oder einem weiteren Ansaugraum und über wenigstens ein weiteres Auslassventil (17, 18) mit dem Auslassraum (15) oder einem weiteren Auslassraum verbindbar ist, wobei die Verdichtungsräume (20, 20') über einen Kanal (35) miteinander verbindbar sind, wobei der Kanal (35) und der eine Verdichtungsraum (20 bzw. 20') den dem anderen Verdichtungsraum (20 bzw. 20') zugeordneten Zusatzraum (20, 35 bzw. 20', 35) bilden, und dass der weitere Verdichtungsraum (20') im Leerlauf über ein weiteres Zusatzventil (10, 30) mit dem Kanal (35) verbunden ist.
Patent DE-19545008-C5 (DE)
Title: Verfahren zur Überwachung von periodisch arbeitenden Maschinen
Inventor: HUBER KARL
IPC: G01M13/02
Filed: 1995-12-02
Granted: 2004-07-22
Abstract: Verfahren zur Überwachung von periodisch arbeitenden Maschinen zur Früherkennung von Maschinenveränderungen, bei dem mittels eines Überwachungssensors maschinenspezifische Meßsignale erfaßt werden, die in einer Auswerteeinheit mit einer Referenz verarbeitet werden, und wobei die das Ausgangsverhalten der Maschine dokumentierende Referenz aus einer Serie von Meßsignalen ermittelt und abgespeichert wird, dadurch gekennzeichnet, daß vom Überwachungssensor (11) gelieferte Zeitsignale in Frequenzsignale umgewandelt werden, daß aus Frequenzsignalen von mindestens zwei Maschinenzyklen Mittelwerte (A(k)) der einzelnen Frequenzordnungen gebildet werden und aus Abweichungen vom Mittelwert ein Instabilitätsmaß (R(k)) für jede Frequenzordnung gebildet wird, das das Ausgangsverhalten der Maschine (10) darstellt, ferner daß die aktuellen Mittelwerte (A(k)) mit dem Referenz-Mittelwert (A R (k)) verglichen werden und daß bei Überschreiten eines Instabilitätsmaßes (R(k)) eine Maschinenänderung angezeigt wird.
Patent DE-69419268-C5 (DE)
Title: Zimmerklimaanlage für ein heizungs-, kühlungs- und lüftungssystem
Inventor: KEMNA RENE
IPC: F24F3/06
Filed: 1994-08-08
Granted: 2007-10-11
Abstract: Raumklimaeinheit
zum Klimatisieren eines Raumes eines Gebäudes, mit:  einem ersten
Wärmetauscher
(100); und  einer Lüftungseinheit,
die wenigstens ein Gebläse
(104) aufweist, um direkt von der Außenseite des Gebäudes durch
ein Einlassrohr und durch den ersten Wärmetauscher (100) Luft in den
Raum zu saugen und um aus dem Raum durch den ersten Wärmetauscher
(100) und durch ein Auslassrohr Luft auszublasen, wobei der erste
Wärmetauscher
(100) und die Lüftungseinheit
mit einem zweiten Wärmetauscher
(110) kombiniert sind, der dafür
ausgelegt ist, mit einem Fluidrohrsystem (114) verbunden zu werden, um
ein Heizfluid oder ein Kühlfluid
von einer Wärmeerzeugungseinrichtung
bzw. einer Kälteerzeugungseinrichtung an
den zweiten Wärmetauscher
(110) zu verteilen, dadurch gekennzeichnet, dass eine Schichtstruktur
aus dem ersten Wärmetauscher
(100), einer Isoliermaterialschicht (112) und dem zweiten Wärmetauscher
(110) gebildet ist, wobei sich der erste und der zweite Wärmetauscher
im allgemeinen vertikal erstrecken, und wobei die Raumklimaeinheit sowohl
die Temperatur als auch die Luftqualität in...
Patent DK-71090-D0 (DK)
Inventor: TOPSOEE HALDOR FREDERIK AXEL
IPC: C07C29/151
Filed: 1990-03-19
Abstract: The invention comprises a method of preparing methanol by reacting synthesis gas comprising hydrogen and carbon oxides (CO, CO2) in a fixed bed methanol synthesis catalyst, the improvement of which comprises reacting the synthesis gas at reaction conditions, where condensation of methanol occurs on the catalyst. <IMAGE>
Patent DK-97091-D0 (DK)
Inventor: JOHANSSON STIG
IPC: A61C8/00
Filed: 1991-05-23
Abstract: PCT No. PCT/SE89/00688 Sec. 371 Date May 15, 1991 Sec. 102(e) Date May 15, 1991 PCT Filed Nov. 24, 1989 PCT Pub. No. WO90/05499 PCT Pub. Date May 31, 1990.A device for supporting artificial teeth, which device is intended to be secured to anchoring elements in a jaw, includes tubes, which are secured to the anchoring elements, and a bridge formed as an integral piece and fixed to the end surfaces of the tubes. The end surface of each tube is in the same plane as the corresponding engagement surface on the bridge. For making the device, one or more planes are determined, giving the bridge a suitable position in relation to the anchoring elements, and the tubes are cut such that their end surfaces will be located in the planes when the device has been secured to the anchoring elements. Each of the engagement surfaces of the bridge is thereafter processed so as to be located in the same plane as the end surface of the corresponding tube, and the bridge is finally secured to the tubes by welding.
Patent HU-900274-D0 (HU)
Title: High pressure regulating tank
Inventor: PISTEK VACLAV
IPC: B65D83/38
Filed: 1990-01-25
Abstract: A pressurized dispensing container consisting of a protective flask having a neck and a lid provided with a discharging pressure valve, and designed especially for dispensing hair lacquer, perfume, shaving cream, liquid soap, tooth paste, disinfectants, oils, ketchup and mustard, is provided in its interior with a closed resilient hollow body (7) provided about its periphery with at least one bead (6) serving for sealing the body (7) between the neck (4) of the protective flask (1) and the lid (9) thereof with the filling and discharging pressure valve.
Patent DK-104391-D0 (DK)
Inventor: HOWARD JR EDWARD GEORGE
IPC: C08F8/00
Filed: 1991-05-31
Abstract: Novel ultrahigh molecular weight linear polyethylene (UHMWLPE) in the form of a shaped article, exhibiting a unique combination of properties making the material useful as a bearing surface, in general, but particularly useful as a prosthetic hip joint cup and as other prosthetic shapes for replacement of other joints of the human body. A novel process for preparing this article is also disclosed.
Patent DK-248785-D0 (DK)
Inventor: RITTER WOLFGANG
IPC: A01N57/16
Filed: 1985-06-03
Abstract: A process for combating Varoa Jacobsoni on bees, comprising applying to the bees or their habitat an amount effective therefor of 0,0-diethyl 0-(3-chloro-4-methyl-7-coumarinyl) thionophosphate.
Patent DK-310986-D0 (DK)
Inventor: GRELL WOLFGANG
IPC: C07D295/04
Filed: 1986-06-30
Abstract: 1. Phenylacetic acid derivatives of general formula  see diagramm : EP0208200,P24,F1  wherein R1 represents a pyrrolidino, piperidino, 4-methylpiperidino, 3-methyl-piperidino, 3,3-dimethyl-piperidino, 3,5-dimethyl-piperidino or hexamethyleneimino group, R2 represents a hydrogen, fluorine or chlorine atom or a methyl or methoxy group, R4 represents a hydrogen atom, an alkyl group with 1 to 3 carbon atoms or an allyl group, R3 represents an alkyl group with 1 or 2 carbon atoms substituted by a tetrahydrofuranyl, tetrahydropyranyl or cycloalkyl group, in which the cycloalkyl part may contain 3 to 7 carbon atoms, an alkenyl group with 3 to 5 carbon atoms or an alkynyl group with 3 or 4 carbon atoms, and W represents methyl, hydroxymethyl, formyl, carboxy or alkoxycarbonyl group, whilst the alkoxy part may contain from 1 to 4 carbon atoms and may be substituted by a phenyl group, and the enantiomers and salts thereof.
Patent DK-492288-D0 (DK)
Inventor: ITOH YASUO
IPC: C07C255/50
Filed: 1988-09-05
Abstract: Amide-compounds represented by the formula (I): <CHEM> wherein R1 represents hydrogen, lower alkoxy, hydroxy, lower alkyl, halogen, amino which can be substituted by lower alkyl, nitro, cyano, sulfamoyl which can be substituted by lower alkyl, R2 represents hydrogen, lower alkoxy, hydroxy, lower alkyl, halogen, amino, nitro, wherein R1 and R2 can be combined to form methylenedioxy, R3 means hydrogen, lower alkyl, halogen, or amino, R4 and R5 may be the same or different and each represents lower alkyl or wherein R4 and R5 may be combined together with nitrogen to form 1-pyrrolidinyl or piperidino, and pharmacologically-acceptable acid-addition salts thereof, which exhibit excellent effects in the activation of gastric motor function, a process for preparation pharmaceutical compositons thereof, as well as a method for the treatment of a subject suffering from an ailment associated with inadequate gastric motor function by administrating such a compound to the said subject, are all disclosed.
Patent DK-501388-D0 (DK)
Inventor: CHARLTON STEVEN C
IPC: G01N33/52
Filed: 1988-09-09
Abstract: The invention involves the use of a multiple oxidative indicator system capable of generating different hues at different concentrations of hydrogen peroxide or at different concentrations of an analyte from which hydrogen peroxide is generated by means of the analyte specific oxidase. At least one component of the multiple oxidative indicator system changes from a particular hue to a different hue upon oxidation. A second indicator component is capable of being oxidized to a form having a hue which is visually distinct from the first indicator component in either of its forms. The test compositions of this invention are capable of generating visually distinct hues at different concentrations of hydrogen peroxide and can be used to generate a "rainbow" in an oxidative system.
Patent DK-539083-D0 (DK)
Inventor: KRISTENSEN OLAV ABO
IPC: B05B1/00
Filed: 1983-11-25
Abstract: Normally, an ejection nozzle with apistol grip valve and two nozzle tubes protuding from there to a narrow high-pressure nozzle and a wide low-pressure nozzle are used for high-pressure cleaning units. In the tube leading to the low-pressure nozzle, a shut-off valve is provided, said nozzle being closed when spraying through the ejection nozzle. In the invention, both the two nozzles and the shut-off valve are incorporated in a single nozzle unit, which only requires a single inlet tube (2). This tube terminates in a high-pressure nozzle opening (10), but a wide side duct (12) is provided in front of this opening, said duct feeding the water out to an annular chamber, from where it can flow out through an annular outlet (60) around the high-pressure nozzle after an operational sliding movement of the external cylindrical part (6) proper of the nozzle unit. Around and in front of the annular outlet (60), a cylindrical jacket is disposed, said jacket having a transverse wall (26) forwardly spaced from the high-pressure nozzle (10). In the said wall, a wider ejection opening (44) is provided coaxially with it, said opening constituting the low-pressure nozzle. In shifting the cylindrical part (6) the opposite way, the annular outlet (60) is closed, so that ejection only takes place through the high-pressure nozzle (10) out through the wider low-pressure nozzle opening (44). The cylindrical part (6) has an external rotatable jacket (54) which is controllably connected with a couple of lip plates (46) placed in front of the low-pressure nozzle, said plates acting so as to impart a fan shape to the ejected jet, so that the cylindrical part (6) can moreover be operated for adjusting the fan width of the jet.
Patent DK-555789-D0 (DK)
Inventor: LOTH MYRIAM
IPC: A61K8/06
Filed: 1989-11-07
Abstract: Stable microemulsion cleaning compositions are described which, in the absence of opacifying component, appear clear to the eye, and which are especially useful for cleaning surfaces having oily or greasy soils thereon, which comprise synthetic organic detergent, water, co-surfactant of a described type, and perfume (or equivalent hydrocarbon). The detergent composition may be concentrated and may be employed as is, or it may be in dilution with water, in the form of a similarly clear and stable microemulsion. In process aspects of the invention both the concentrated and the diluted compositions may be employed to remove oily and greasy stains from substrates, such as normally shiny bathroom fixture and floor and wall surfaces, including tiles, by a "spray and wipe" process, which leaves the surface shiny, with minimal or no rinsing needed. When the invented compositions are acidic they are also useful for removing lime scale and soap scum from hard surfaces. Also described are processes for manufacturing the invented compositions.
Patent DK-557683-D0 (DK)
Inventor: HENNEBERGER HANS
IPC: H05K3/30
Filed: 1983-12-05
Abstract: A miniature hearing aid (1) includes a microphone (12), a receiver (14) an amplifier (15), and a battery connectable via a contact (18), all of which are contained in a housing (2,3). The amplifier is constructed of a printed circuit board (20) and a plurality of components (21). In order to save space, the components (21) are countersunk in openings (24) in the circuit board (20) to reduce the vertical dimension of the amplifier. The openings (24) are used as temporary supports and for exact positioning for the components (21) by making them rectangular with cut off edges.
Patent HU-9301109-D0 (HU)
Title: Tool for measuring electric impedance of organic and biological materials
Inventor: OLLMAR STIG
IPC: A61B5/05
Filed: 1991-10-18
Abstract: PCT No. PCT/SE91/00703 Sec. 371 Date Apr. 16, 1993 Sec. 102(e) Date Apr. 16, 1993 PCT Filed Oct. 18, 1991 PCT Pub. No. WO92/06634 PCT Pub. Date Apr. 30, 1992.A device and method for noninvasive depth-selective detection and characterization of surface phenomena in organic and biological material such as tissues by surface measurement of the electrical impedance of the material. The device includes a probe with a plurality of measuring electrodes separated by a control electrode. Measuring equipment measures impedance in a desired frequency range. An adjustable amplifier maintains a chosen control signal derived from the potential of one of the measuring electrodes at the control electrode without loading the measuring electrode. Depth selectivity is achieved by controlling the extension of the electric field in the vicinity of the measuring electrodes by the control electrode actively driven with the same frequency as the measuring electrodes.
Patent HU-9301820-D0 (HU)
Title: New medical applications of new 3-4-dihydroisoquinoline derivatives and dihydropyridine ones anellated with carbocycle and heterocycle
Inventor: LOESEL WALTER
IPC: A61K31/445
Filed: 1991-12-20
Abstract: 3,4-Dihydro-6,7-dimethoxy -1-(alpha-(bis(2-(2,3,4- trimethoxyphenyl)ethyl) -carbamoyl)benzyl)isoquinoline of formula (Ia) and its salts are new. Fused-ring dihydropyridine derivs. of formula (II) and their tautomers, salts and complexes are used as cerebroprotective agents, agents for treating chronic inflammatory disorders, and anticoagulants: X = OR1, NHR2 or NR3R4; R1 = H, 1-4C alkyl or 2-4C alkoxyalkyl; R2 = (a) e.g. H, 3-6C alkenyl, or (b) e.g. 1-6C alkyl opt. substd. by e.g. halogen, CN, OH, SH, 1-4C alkoxy; R3 and R4 = 1-4C alkyl opt. substd. by Ar2 or NR3R4 is a satd. or partially satd. opt. substd. 5- or 6-membered ring, opt. contg. up to two further heteroatoms (N, O and/or S): Ar1, Ar2 and R5 = phenyl opt. substd. by e.g. halogen, 1-4C alkoxy; Het = indolyl or 5- or 6-membered opt. substd. heterocyclyl contg. 1-3 heteroatoms (N, O and/or S); A = a gp. of formula A1-A4;: R5 is e.g. H, 1-4C alkyl; R6 and R7 is H, OH or R6+R7 = O(CH2)nO; R9 = H or 1-4C alkyl; R10 = H or 2-phenyl-2-ethoxycarbonylacetyl. Cpds. (I), other than (Ia), are described in EP 37934 and 251194.
Patent HU-9203912-D0 (HU)
Title: Recombinant 21 kd cocoa protein and its precursor
Inventor: SPENCER MARGARET ELIZABETH
IPC: C12N15/29
Filed: 1991-06-07
Abstract: PCT No. PCT/GB91/00913 Sec. 371 Date Jan. 27, 1993 Sec. 102(e) Date Dec. 11, 1992 PCT Filed Jun. 7, 1991 PCT Pub. No. WO91/19800 PCT Pub. Date Dec. 26, 1991A 21 kD protein, and its 23 kD expression precursor, as the source of peptide flavor precursors in cocoa (Theobroma cacao) have been identified. Genes coding for them have been probed, identified and sequenced, and recombinant proteins have been synthesized.
Patent HU-9204079-D0 (HU)
Title: Method for producing dibenzo- or benzo-pyrido-cyclohepta-piperidene or -piperilidene and -piperazine derivatives thereof and pharmaceutical preparatives containing them
Inventor: PIWINSKI JOHN J
IPC: A61K31/00
Filed: 1991-06-21
Abstract: PCT No. PCT/US91/04162 Sec. 371 Date Dec. 14, 1992 Sec. 102(e) Date Dec. 14, 1992 PCT Filed Jun. 21, 1991 PCT Pub. No. WO92/00293 PCT Pub. Date Jan. 9, 1992.Bis-benzo or benzopyrido piperidene, piperidylidene and piperazine compounds of the formula: ts thereof are disclosed, wherein Z represents -(C(Ra)2)m-Y-(C(Ra)2)n- or   <IMAGE>   The compounds of Formula I possess anti-allergic and anti-inflammatory activity. Methods for preparing and using the compounds are also described.
Patent IT-8203353-D0 (IT)
Inventor: GAMBERINI GIAN LUIGI
IPC: F15B7/00
Filed: 1982-03-02
Abstract: In order to obtain a hydraulic power unit of small dimensions and simple construction, particularly adapted for double-acting hydraulic actuators, the pump (A) of the power unit is constituted by a reversible pump, activated, for example, by a reversible electric motor, while the two mouths (B, B min ) of the pump, each of which can operate alternately as a suction mouth and as a delivery mouth, are each connected or connectible, possibly by means of a hydraulic distributor (R), at one side to conduits (C, C min  or C sec , C''') for connection to the user and at the other side to the tank (H) for the hydraulic liquid either by means of associated unidirectional valves (F, F min ) opening in the direction of the flow from the tank (H) to the respective mouth (B, B min ), or - parallelly with said unidirectional valves (F, F min ) - by means of associated automatic pressure relief valves (L, L min ).