baber/WOPTO huggingface dataset:
Patent DE-112015001397-B4 (DE)
Title: Fahrzeugklimatisierungseinheit
Inventor: SEKITO YASUHIRO
IPC: B60H1/32
Filed: 2015-03-16
Granted: 2022-07-14
Abstract: Fahrzeugklimatisierungseinheit, die umfasst:ein Klimaanlagengehäuse (12), das Luft in ein Fahrzeuginneres zirkuliert,einen Kühler (16), der in dem Klimaanlagengehäuse (12) angeordnet ist, wobei der Kühler (16) die in dem Klimaanlagengehäuse (12) strömende Luft kühlt, undeine Heizung (18) die in dem Klimaanlagengehäuse (12) angeordnet ist, wobei die Heizung (18) die aus dem Kühler (16) strömende Luft heizt, wobeidie Heizung (18) einen Überlappungsabschnitt (18a) umfasst, der derart angeordnet ist, dass er in einer Vertikalrichtung (DR1) des Fahrzeugs von unten mit dem Kühler (16) überlappt, wobei der Überlappungsabschnitt (18a) wenigstens ein Abschnitt der Heizung (18) ist, unddas Klimaanlagengehäuse (12) eine erste Gehäusewand, die von demKühler (16) erzeugtes kondensiertes Wasser (Wcd) aufnimmt, umfasst, wobei die erste Gehäusewand über dem Überlappungsabschnitt (18a) der Heizung (18) angeordnet ist und zwischen der Heizung (18) und dem Kühler (16) angeordnet ist, wobeidie Luft in dem Klimaanlagengehäuse (12) in einer Luftströmungsrichtung (FW1, FW2) orthogonal zu der Vertikalrichtung (DR1) strömt,der Kühler (16) ein oberes Ende und ein unteres Ende umfasst, wobei das obere Ende in einer geneigten Weise in Bezug auf die Vertikalrichtung (DR1) angeordnet ist, so dass das obere Ende im Vergleich zu dem unteren Ende in dem Klimaanlagengehäuse (12) strömungsabwärtig in der Luftströmungsrichtung (FW1, FW2) versetzt ist,die Heizung (18) derart angeordnet ist, dass sie in eine gleiche Richtung wie der Kühler (16) geneigt ist,die erste Gehäusewand derart angeordnet ist, dass ein Abschnitt oder die gesamte erste Gehäusewand in der Horizontalrichtung des Fahrzeugs zwischen einem strömungsabwärtigsten Ende (162a), das auf einer strömungsabwärtigsten Seite des oberen Endes des Kühlers (16) in der Luftströmungsrichtung (FW1, FW2) angeordnet ist, und einem strömungsaufwärtigsten Ende (183a), das auf einer strömungsaufwärtigsten Seite eines unteren Endes der Heizung (18) in der Luftströmungsrichtung (FW1, FW2) angeordnet ist, eingefügt ist,das Klimaanlagengehäuse (12) eine zweite Gehäusewand umfasst, die strömungsabwärtig von der Heizung (18) in der Luftströmungsrichtung (FW1, FW2) angeordnet ist, und wobeidie erste Gehäusewand und die zweite Gehäusewand ein Inneres des Klimaanlagengehäuses (12) vertikal unterteilen, um einen ersten Luftströmungsdurchgang (125) und einen zweiten Luftströmungsdurchgang (126) zu definieren, wobei die Luft in der Luftströmungsrichtung (FW1, FW2) durch den ersten Luftströmungsdurchgang (125) und den zweiten Luftströmungsdurchgang (126) strömt, wobei der zweite Luftströmungsdurchgang (126) unterhalb des ersten Luftströmungsdurchgangs (125) angeordnet ist.
Patent CZ-283896-B6 (CZ)
Inventor: FINKBEINER LUDWIG
IPC: B21C37/30
Filed: 1993-08-11
Abstract: Nástroj (10) je vytvořen se zaváděcí částí (13), s náběžnou částí (15), která má úkos, s tangeciální částí (18), která téměř bez přechodu přechází do válcové první pracovní části (17), jejíž průměr je větší než průměr opracované součásti, s alespoň jednou zakřivenou první zotavovací částí (20), s alespoň jedním žlábkem (22), s alespoň jednou druhou zotavovací částí (24) a s alespoň jednou druhou pracovní částí (26), jejíž délka je asi 60 % délky první pracovní části (17), s výběhovou částí (30), která má větší úhel úkosu než náběžná část (15), s výběhovým válcem (32) a s vrchlíkem (34). Zpracování povrchu se provádí tak, že osy nástroje (10) a opracované součásti se fixují navzájem souose v jednom upínači, že nástroj (10) se pohybuje relativně vůči opracované součásti pro ohřev povrchu součásti minimální rychlostí, takže opracovaný povrch součásti se leguje přiváděnými kovovými cizími ionty, obsaženými v iontové mazací kapalině.ŕ
Patent SK-283369-B6 (SK)
Title: A variant phosphoenolpyruvate carboxylase, micro-organism, recombinant DNA and process for producing amino acid
Inventor: SUGIMOTO MASAKAZU
IPC: C12P13/14
Filed: 1994-08-17
Abstract: Disclosed is a variant phosphoenolpyruvate carboxylase coming from micro-organism of Eschrichia, which is not sensitive to the back inhibition by aspartic acid, whilst through the resistance against the compound of the group, comprising 3-brompyruvate, aspartic acid beta-hydrazide and DL-treo-beta- hydroxyaspartic acid. Disclosed is also DNA encoding a variant phosphoenolpyruvate carboxylase, micro-organisms transformed by such DNA and process for producing amino acids through these micro-organisms.
Patent SK-282440-B6 (SK)
Inventor: SCHWARK JAN-ROBERT
IPC: C07D333/34
Filed: 1997-02-13
Abstract: Sú opísané substituované guanididy tiofenylalkenylkarboxylových kyselín všeobecného vzorca (I), v ktorom substituenty R1 až R5 majú význam uvedený v opise, sú to významné antiarytmicky účinné liečivá s kardioprotektívnym komponentom a sú mimoriadne vhodné pri profylaxii a liečení infarktu a anginy pectoris, pričom tiež preventívne inhibujú alebo silne zoslabujú patofyziologické deje pri vzniku ischemicky indukovaných poškodení, najmä pri vzniku ischemicky indukovaných srdcových arytmií.ŕ
Patent SK-282563-B6 (SK)
Title: Oxazolidinone derivative, its preparation method, its use and pha rmaceutical preparation containing it
Inventor: GANTE JOACHIM
IPC: C07D413/06
Filed: 1996-05-06
Abstract: Disclosed is an oxazolidinone derivative of general formula (I), wherein R is a group of general formula (a), wherein n means 1 or 2, R1 H, R2 OH, OA, Oar, Ohet, NHOH, NH2, NHA or NA2, R3 A-CO, ArCO, Het-CO, Het-O-CO, Ar-O-CO, A-O-CO-, Ar-SO2 or A-SO2, A C1-6 alkyl, Ar C6-10 aryl, diphenylmethyl, or benzyl, which are optionally substituted by 1, 2 or 3 substituents from the complex A, F, Cl, Br, J, AO, -O-CH2-O, COOA, COOH, CF3, OH, NO2, CN, -O-CO-A, NH2, NHA and NA2, Het mono or bicyclic, saturated, unsaturated or aromatic heterocyclic group with 1 to 4 N, O and/ or S, optionally substituted by one substituent from the complex F, Cl, Br, CF3, A, OH, OA, CN and NO2, and its physiologically suitable salts prevent binding of fibrinogen to the related receptors and are suitable for treatment of thrombosis, osteoporosis, tumorous diseases, apoplexy, heart attack, ischemias, inflammations, arteriosclerosis and osteolytic diseases.
Patent SK-280003-B6 (SK)
Title: Method of the production of highly active catalysts and their use
Inventor: HAFNER NORBERT
IPC: C08F10/06
Filed: 1994-05-19
Abstract: A method of the preparation of highly active catalysts for the olefin polymerisation includes the reaction of organometallic compounds of the formula (RCH2)4M, wherein R is an aryl, aralkyl, terc.-alkyl or trialkylsilyl residual, with the proviso that a RCH2 group contains no atom bound in the beta to M position and where M is Ti, Zr or Hf with oxides selected from the group consisting of IIa, IIIa, IVa and IVb having a partly hydroxylated surface, or mixtures thereof, in a hydrocarbon as the reacti on medium, the resulting catalyst optionally being hydrogenated, whilst the by-products formed during the reaction are essentially removed from the catalyst.
Patent SK-282194-B6 (SK)
Inventor: MACUREK IVAN
IPC: F28C3/10
Filed: 1993-08-27
Abstract: Chladiaca doska roštu chladiča na chladenie, najmä cementárskeho slinku vzduchom je vytvorená tak, že na hornej ploche (2) a čelnej ploche (3) chladiacej dosky (1) sú aspoň dva rady pozdĺžnych otvorov (4) na uloženie priebežných chladiacich výstupkov (5) súbežných v smere pohybu materiálu na roštovej ploche. Šírka chladiacich výstupkov (5) nad chladiacou plochou je väčšia ako šírka pozdĺžnych otvorov (4). Medzi spodnou plochou výstupkov (5) a hornou plochou (2) aj čelnou plochou (3) chladiacej dosky (1) sú pozdĺžne škáry (6) na prívod chladiaceho vzduchu do chladeného materiálu a na hornej ploche (2) medzi výstupkami (5) sú umiestnené priečne rebrá, ktorých výška je menšia ako výška výstupkov (5) a k ich spodnej časti pod hornou chladiacou plochou (2) je pripojená usmerňovacia priehradka (10). Horná plocha (2) a výstupky (5) sú na svojich spodných stranách vybavené chladiacimi rebrami (7, 8).ŕ
Patent CS-275789-B6 (CS)
Inventor: POKLUDA IVO ING CSC
IPC: C08L27/06
Filed: 1990-03-14
Abstract: Adhezívní systém pro směsi na bázi polyvi-·
nylchloridu a textilní výztužné materiály
podle návrhu je tvořen kombinací 0,1 až
6 hmot. dílů maleinimidu a 0,1 až 4 hmot.
dílů trimerkaptotriazinu nebo 0,1 až 6
hmot. dílů maleinimidu a 0,1 až 4 hmot.
dílů N-cyklohexyl-2-benzothiazylsulfenamidu
na 100 hmot. dílů polyvinylchloridu.
Patent CZ-280811-B6 (CZ)
Inventor: SLOMEK VRATISLAV ING
IPC: B23Q5/58
Filed: 1992-06-18
Abstract: Zařízení zajišťující automatické přesunutí krytů pracovního prostoru obráběcího centra má na rámu (1) stroje připevněn první nosník (3) a druhý nosník (4), které jsou spojeny vodící tyčí (2). Na vodící tyči (2) je kluzně uloženo první ložisko (51) opatřené prvním táhlem (511), druhé ložisko (52) s druhým táhlem (521), třetí ložisko (61) s třetím táhlem (611) a čtvrté ložisko (62) s čtvrtým táhlem (621). První táhlo (511) je svým jedním koncem připevněno k prvnímu krytu (5) a druhým koncem k pístnici (12) hydraulického motoru (13) uloženého na rámu (1) stroje. Druhé táhlo (521) je pevně spojeno s prvním krytem (5) a třetí táhlo (611) a čtvrté táhlo (621) jsou pevně spojena s druhým krytem (6). Na rámu (1) v části u třmenů jsou připevněny první konzola (7) s prvním kolem (8) a druhá konzola (71) s druhým kolem (9). K prvnímu táhlu (511) a k třetímu táhlu (611) je přes druhé kolo (9) připevněn druhý řetěz (10) a k druhému táhlu (521) a k čtvrtému táhlu (621) je přes ŕ
Patent CZ-282934-B6 (CZ)
Title: Filling valve drive
Inventor: PLANGGER RICO
IPC: F01D17/26
Filed: 1990-12-18
Abstract: This drive for a supply valve has an operating line (1) and a device for controlling the pressure in the operating line (1). The device comprises three valves (2, 3, 4) which are connected to one another to form a hydraulic 2-of-3 circuit. 
<??>It is intended to create a drive for a supply valve, which is suitable for a comparatively high oil pressure and whose functional capability can be monitored by simple means. This is achieved by it being possible to apply pressure to a test system (14) via the device, and by it being possible to detect a pressure drop in the test system by means of a sensor. 
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Patent CZ-289196-B6 (CZ)
Title: Textile article, process of its production and layered composite article
Inventor: DE SMET GABRIEL
IPC: D04B21/00
Filed: 1990-12-18
Abstract: The invented textile article, intended particularly as a core for a layered article contains at least one fabric (10) made of at least one type of thread. The fabric (10) is formed by a basic knitted fabric being impregnated with a resin and formed at predetermined regions in order to form places (11, 11a) with projections having within the textile article a variable height and/or density. A process for manufacturing such textile article is characterized by knitting the fundamental fabric (10) with a predetermined weave with one or more kinds of threads, whereby the weave and/or the knitted fabric density and/or distribution of individual thread types is changed locally and at least one of the threads contained in the fabric (10) is a thread impregnated with a resin. The knitted fabric is then formed in transverse direction to a desired form in order to obtain places (11) with projections and the form is fixed by polymerization of the resin, by which the fabric (10) is impregnated. In
Patent CZ-293180-B6 (CZ)
Title: Hydraulically adjustable check valve for hydraulics of support in mines
Inventor: DETTMERS MICHAEL
IPC: F16K15/02
Filed: 1999-03-24
Abstract: The invented hydraulically adjustable check valve for hydraulics of support in mines has a valve body (13) arranged within a valve housing (1) and loaded by a closing spring (22) in the direction of closing and which can be lifted for the pressure relief of the hydraulic system high-pressure side from the valve seat (11) against the force of the closing spring (22) by a control piston (17) operated by hydraulic control pressure. The control piston (17) is provided with valve lifter (18) acting against the valve body (13) on the outlet side thereof. In the valve housing (1), there is arranged a pressure relief valve for preliminary relief and controlled by the control piston (17) against the force of its closing spring (22). The control piston (17) surface (17'), controlled by a the hydraulic control pressure is less than the valve body (13) surface controlled by operating pressure in the shut-off direction of the check valve. The piston surface (17') is smaller than the valve body (13) surface so that the valve body (13) could be lifted by the control piston (17) from its seat (11) only at a preset relief of the operating pressure on the high-pressure side, which pressure relief corresponds to at least 20 to 50 percent of the operating pressure caused by the open pressure relief valve.
Patent CZ-284544-B6 (CZ)
Title: Derivative of 4-aryloxy- or 4-arylthiopiperidine, process of its preparation and pharmaceutical composition containing thereof
Inventor: PRUCHER HELMUT
IPC: A61K31/42
Filed: 1994-07-19
Abstract: Novel 4-aryloxy- or 4-arylthiopiperidine derivatives of the formula I   <IMAGE>  in which   R<1> and R<2> in each case independently of one another are phenyl radicals which are unsubstituted or substituted one or two times by A, OH, OA, aryloxy having 6-10 C atoms, aralkyloxy having 7-11 C atoms, -O-(CH2)n-O-, Hal, CF3, NO2, NH2, NHA, NA2, NHAc, NAAc, NHSO2A and/or NASO2A,   X is O, S, SO or SO2,   m is 1, 2 or 3,   n is 1 or 2,   A is an alkyl radical having 1-6 C atoms,   Hal is F, Cl, Br or I  and Ac is alkanoyl having 1-8 C atoms, aralkanoyl having 1-10 C atoms or aroyl having 7-11 C atoms, and their physiologically acceptable salts, have an action affecting the central nervous system, in particular neuroleptic action, without a noticeable cataleptic action occurring.
Patent CZ-289152-B6 (CZ)
Title: Homogeneous liquid preparation capable of subcutaneous administration of active substances
Inventor: TOMLINSON ROD
IPC: A61K47/34
Filed: 1997-11-24
Abstract: The present invention comprises a substantially homogeneous liquid preparation capable of subcutaneous administration of one or more physiologically active agents and which contains a modulation rate polymer, a volatile solvent and at a temperature ranging from one physiologically active agent. Said modulation rate polymer is intended for possible adjustment of administration rate of said physiologically active agent. In the present invention there is also described the use of the preparation for prophylactic and therapeutic antimicrobial, antifungal or antiviral treatment.
Patent CZ-285596-B6 (CZ)
Title: Process for producing absorption article
Inventor: QUIST MAGNUS
IPC: A61F13/53
Filed: 1994-05-20
Abstract: PCT No. PCT/SE94/00477 Sec. 371 Date Nov. 30, 1995 Sec. 102(e) Date Nov. 30, 1995 PCT Filed May 20, 1994 PCT Pub. No. WO94/28839 PCT Pub. Date Dec. 22, 1994An absorbent structure in an absorbent article, such as a sanitary napkin, tampon, panty protector, incontinence guard, diaper and the like, which is produced by including in the absorbent structure a polymeric foam having cells which were initially essentially closed and which has been worked so as to open said cells, and the structure has obtained liquid take up properties. The foam has a density between 0.01-0.5 g/cm3. The material has porperties which are effective in achieving the function for which the product is intended. The foam may be formed as a sheet and the sheet can be made very thin and light, with a surface weight of between 10-500 g/m2, and the article will therefore exhibit good comfort properties to the wearer and requires only a small amount of material for its manufacture.
Patent CZ-290887-B6 (CZ)
Title: Carboxylic acid ester derivative, process of its preparation and insecticidal agent containing thereof
Inventor: KATSUDA YOSHIO
IPC: C07D317/54
Filed: 1996-02-07
Abstract: The present invention relates to a carboxylic acid ester derivative of the general formula I, in which Re1 represents alkyl containing 1 to 4 carbon atoms, Re2 represents the group of the general formula IV, wherein Re4 represents a hydrogen atom or ethynyl, Re5 and Re6 represent independently on each other a hydrogen atom, a fluorine atom, a chlorine atom or methyl, Re7 represents a hydrogen atom or a trifluoromethyl group, Re8 represents a propargyl, a methoxymethyl or a methylthio group or Re7 and Re8 together form a methylenedioxy group. The derivative is an active substance used for a quick-acting insecticidal agent with protracted activity and with low toxicity against warm-blooded animals. In the present invention there are is also claimed a process for preparing the derivative as well as its use.
Patent CZ-290977-B6 (CZ)
Title: Flexible, transparent container for improved storage of oxygen sensitive parenterally administerable agents a process for producing thereof
Inventor: GUSTAFSSON BO
IPC: B32B7/02
Filed: 1997-04-09
Abstract: In the present invention there is disclosed a flexible transparent container for improved storage of oxygen sensitive parenterally administerable agents comprising an inner, primary container (30) enclosed in a substantially oxygen impermeable outer envelope (10) with an oxygen absorber (20), whereby the inner, primary container (30) is made of a flexible polymer material containing  polypropylene compatible with lipophilic agents capable of forming both permanent and peelable seals, while the envelope (10) is made of a substantially water impermeable flexible multilayer polymeric material comprising a first outer substantially water impermeable polymeric film with oxygen barrier forming capacity, assembled with a second, inner polymeric film with a supplementary oxygen barrier forming capacity. A process for producing such container forms a part of the present invention, too.
Patent CZ-292176-B6 (CZ)
Title: Coating composition with low emissivity in the heat radiation range and use thereof
Inventor: HUGO GERD
IPC: C09D7/61
Filed: 1995-05-11
Abstract: In the present invention there is disclosed a coating composition exhibiting a low emissivity or high reflectivity in the heat radiation wavelength range and containing a binder with high transparency in the heat radiation range and particles having a high transparency in this range and high refractive index, whereby the refractive index of the particles differs from that of the binder. The invention is characterized in that the product of refractive index of the individual particles on the heat infrared radiation range and the particle diameter is equal to the half of average wavelength in a wave range at which the coating composition ought to have low emissivity effect. Claimed is also the use of the above-described coating composition for manufacturing layered pigments.
Patent CZ-290069-B6 (CZ)
Title: DNA expression cassette, a yeast expression vector, a yeast cell and a process for producing a polypeptide in yeast
Inventor: KJELDSEN THOMAS BORGLUM
IPC: C12N15/62
Filed: 1995-06-16
Abstract: In the present invention there is described a DNA expression cassette comprising the following sequence: 5'-P-SP-LS-PS-*gene*-(T)i-3' wherein P is a promoter sequence, SP is a DNA sequence encoding a signal peptide, LS is a DNA sequence encoding a leader peptide, PS is a DNA sequence encoding a processing site, *gene* is a DNA sequence encoding a polypeptide, T is a terminator sequence and i is 0 or 1. There is further described a yeast expression vector comprising the above-specified expression cassette, a yeast cell which is capable of expressing a polypeptide and which is transformed with the yeast expression vector. Also claimed is a process for producing a polypeptide in yeast, the process comprising culturing a yeast cell, which is capable of expressing the desired polypeptide and which is transformed with the yeast expression vector in a suitable medium to obtain expression and secretion of the polypeptide, after which the polypeptide is recovered from the medium.
Patent SK-283288-B6 (SK)
Title: Tetrahydropyridine compounds, pharmaceutical composition comprising them and use thereof
Inventor: SENN-BILFINGER JORG
IPC: C07D471/14
Filed: 1998-03-19
Abstract: Disclosed are tetrahydropyridine compounds of general formula (I), wherein R1 is 1-4C-alkyl, R3 is H or halogen, R2 is 1-4C-alkyl or hydroxy-1-4C-alkyl, one of the substituents R4a and R4b is H and the other is H, OH, 1-4C-alkoxy, 1-4C-alkoxy-1-4C-alkoxy or 1-4C-alkylcarbonyloxy, or wherein R4a and R4b together are O, one of the substituents R5a and R5b is H and the other is H, OH, 1-4C-alkoxy, 1-4C-alkoxy-1-4C or 1-4C-alkylcarbonyloxy, or wherein R5a and R5b are together O, or wherein one of the substituents R4a and R4b on the one side and one of the substituents R5a and R5b on the other side is H and other substituents are together methylenedioxyradical (-O-CH2-O-) or ethylenedioxyradical (-O-CH2-CH2-O-), wherein R4a, R4b, R5a and R5b are not together H, R6 is halogen, 1-4C-alkyl, 1-4C-alkoxy, 1-4C-alkoxycarbonylamino, 1-4C-alkyl or 1-4C-alkoxy or salts thereof. Disclosed is also pharmaceutical preparation comprising them and use for the prevention and treatment of gastrointestinal diseases.
Patent SK-278700-B6 (SK)
Title: Method for quatification of conversion of nitrates to nitrites accomplished by microorganisms or their enzymes in a biological material sample
Inventor: SAVEL JAN
IPC: G01N33/50
Filed: 1992-10-15
Abstract: The procedure closed to the conversion of nitrates to nitrites is based on that principle, that a sample of a biological material containing nitrates present in the sample or supplied to this sample or up to the cultivation environment, is being cultivated alone or in the cultivation environment n-phenyl diamine or the salts of it, in a concentration 0,01 up to 10 g.l-1 in the sample of the above mentioned biological material or cultivation environment actually, at the temperature 1 up to 70 Celsius degrees for 14 days, and after that the absorbency of the cultivated sample closed to the biological material or to the cultivated mixture closed to his biological material or to the cultivation environment, is being evaluated with use of the visual or photometry procedures.
Patent SK-287959-B6 (SK)
Title: Process for the preparation of hydroxypivalic acid
Inventor: KOMORA LADISLAV
IPC: C07C51/285
Filed: 2008-09-16
Abstract: Process for the preparation of hydroxypivalic acid (3-hydroxy-2,2-dimethylpropionic acid) by oxidizing hydroxypivaldehyde with hydrogen peroxide. The oxidation is conducted in the presence of (2,2,6,6-tetramethylpiperidine)oxyl or its derivatives substituted in position 4 or precursors thereof. The oxyls are used in a catalytic amount, wherein their presence in the course of the oxidation significantly increases the amount of isolated hydroxypivalic acid.
Patent CZ-295866-B6 (CZ)
Title: Device and method of connecting socket pipe sections during trenchless laying of pipes
Inventor: CERMAK ROBERT
IPC: F16L21/00
Filed: 2004-04-08
Abstract: The invented connecting method is characterized in that after excavation of a starting pit (2) and a handling trench (1) there is carried out boring and then enlarging a pilot hole with simultaneous drawing in of piping sections (3) wherein there simultaneously act an axial force produced by a rig (4) that draws into the borehole (17) a pulling head (15) along with the piping and a force produced by a piston of a hydraulic chain stretcher (18) to finally press and seal the connection of the pulling head (15) with the piping. Device for making the method consists of a rig (4) having a pulling head (15). A pulling suspension (13), provided from the pulling head (15) inner side with a shackle (16), passes through the pulling head (15) top. A tow chain (7), passing through all pulled piping sections (3) and being connected with the piston (20) of the  hydraulic chain stretcher (8), is connected to said shackle (16) wherein said piston (20) of the  hydraulic chain stretcher (8) bears via a thrust ring (19) against the socket of the last piping section (3) being pulled.