baber/WOPTO huggingface dataset:
Patent CS-220226-B1 (CS)
Inventor: KMONICKOVA SVETLA
IPC: B01D21/00
Filed: 1981-11-23
Abstract: Víceúčelové zařízení pro zpracování suspenzí
oddělováním pevné fáze od kapalné
na principu sedimentace a filtrace a upravením
získaného pevného podílu do transportovatelné
formy je podle vynálezu tvořeno
nádobou opatřenou filtrační přepážkou,
přívodem a odvodem suspenze, mechanickým
či pneumatickým míchadlem, odvzdušněním,
přepadem, přívodem vody a odvodem
jednak filtrátu, jednak roztoku, vzniklého
případným rozpouštěním filtračního koláče.
Nádoba je opatřena průlezem a zornými
skly. Relativně malý objem nádoby umožňuje
vlivem sedimentace zpracovávat velké objemy
i méně koncentrovaných suspenzí.
Zařízení je použitelné v provozních podmínkách
chemických a podobných výrob.
Patent CS-230913-B1 (CS)
Inventor: JONAS VACLAV
IPC: F16C9/02
Filed: 1982-11-30
Abstract: Účelem vynálezu je zlepšení převodu sil
působících na píst spalovacího motoru
v době expanze, na klikový hřídel, zlepšeni
průběhu točivého momentu motoru a současně
odstranění nebezpečí poškození mechanických
částí motoru při klepání a samozápalech.
Uvedeného účelu se dosáhne vestavěním
excentrické pánevní vložky opatřené na
vnějších stranách přírubami s ozubením,
na ojniční čep klikového hřídele. Poloha
excentrické vložky je řízena systémem
výkyvného protizávaží a pružiny v závislosti
na hodnotě tlaku nad pístem motoru.
Výkyvná část protizávaží je rovněž opatřena
ozubením sloužícím k převodu ohybů
excentrické pánevní vložky na protizávaží.
Zařízení funguje tak, že po zapálení hořlavé
směsi před dosažením horní úvrati
pístu se pánevní vložka tlakem ojnice
pootočí přibližně o 180° a v době zastavení
svého pohybu vůči ojničnímu čepu
půsbbí celý systém .momentem síly tangenciálně
po obvodu opisovaném ojničním čepem.
Současně se vychýlí výkyvné protizávaží
směrem k ose klikového hřídele proti působení
odstředivé síly a pružiny. V další fázi
působí ojnice na klikový hřídel podobně jako
u klasického uspořádání s tlm, že po snížení
tlaku nad plstem se systém pružiny
a výkyvného protizávaží vrátí do výchozí
polohy přičemž předá klikovému hřídeli
energii získanou v počátcích expanze.
Patent CS-252038-B1 (CS)
Inventor: RADIC RUDOLF
IPC: F16D43/20
Filed: 1985-11-29
Abstract: Podstata riešenia spočívá v tom, že na držiaku
je pevne uchytený dvojramenný strmen,
opatřený kyvné pákami, ktorých horné
konce sú opatřené kladkami. Kladky zasahuji!
do prizmatických vybraní, vytvořených
na výstupkoch disku. Na pákách sú
vytvořené vodiace drážky v šikmom smere.
Do vodiacich drážiek zasahujú přítlačné
kladky, uložené v bočniciach zdvihákov.
Zdviháky sú prostredníctvom puzdier posuvné
odpružené uložené v kameni. Kameň
je na držiaku uložený posuvné a je opatřený
vodiacou kladkou korešpondujúcou s bubnovou
vačkou.
Patent CS-271252-B1 (CS)
Title: Drawing track vehicle for armour evacuation
Inventor: MATAS MIROSLAV ING
IPC: F41H7/02
Filed: 1980-12-18
Abstract: The aim of the designed vehicle is the division of the hermetically sealed, in its front part of a bevelled body (1) on the crawler tread (2) into three main spaces: aggregate space (3) in the right front part, fighting space (4) in the middle and left front part, and a cargo and working space (5) at the back of the body (1). The dynamic part of the winder (7) with the rope outlet (16) is situated in the aggregate space (3) on the front bevelled armour, under which the support (10) for the wrecking is placed. The box (8) of the rope (16) is placed from the outer side of the body (1) onto the roof of the fighting space, where also, the shooting tower (9) is placed. The crane (12) is placed onto the roof of the cargo and working space (5) and, in the back part; there is a door (15), under which the draw hook (13) is placed.<IMAGE>
Patent CS-251959-B1 (CS)
Inventor: MACHO VENDELIN
IPC: C07C33/22
Filed: 1984-01-23
Abstract: Výroba arylalkylačného činidla vhodného
hlavně na výrobu arylalkylfenolov, obsahujúceho
metylfenylkarbinol v množstve 5 až
100 % hmotnostných, spravidla tiež styrén
v množstve 0 až 50 % hmotnostných, a 0
až 30 % hmotnostných dalších zložiek (etylbenzén,
acetofenón, uhlovodíky C6 až C16)
sa uskutočňuje tak, že predná frakcia izolovaná
z fenolových smol a obsahujúca 10
až 100 % hmotnostných acetofenónu sa selektívne
hydrogenuje hlavně na metylfenylkarbinole
v kvapalnej a/alebo v parnej fáze.
Hydrogenácia sa uskutočňuje pri teplote
70 až 230 °C (100 až 180 °Cj na katalyzátore
obsahujúcom aspoň jeden kov alebo
zlúčeninu kovu I.b, Il.b a Vl.b skupiny (Cu,
Ag, Zu, Cr a ich zlúčeniny).
Patent CS-218215-B1 (CS)
Inventor: FIALA LADISLAV
IPC: G01P3/26
Filed: 1979-12-27
Abstract: Vynález se týká hydraulického snímacího
ústrojí, zejména pro regulátor úhlové rychlosti
otáčení strojní součástí, např. rotorů
rychloběžných motorů a rotorů vysokootáč­
kových parních turbín.
Podle vynálezu jsou v nákružku hřídele
rotorové části vytvořeny čerpací' kanály,
které propojují v ní upravený vstupní prostor
pro přiváděnou kapalinu s výstupním
prostorem upraveným v těsnicím prstenci,
jenž je neotočně a radiálně kluzně uložen
ve snímačovém tělese statorové části a jenž
je svým vnitřním obvodem ve stálém kluzném
styku s vnějším obvodem nákružku, při­
čemž na výstupní prostor je připojeno vý­
tlačné potrubí pro odváděnou kapalinu. Ve
snímačovém tělese je alespoň okolo jednoho
okraje nákružku, opatřeného· bočními čerpacími
drážkami, vytvořena obvodová protitlaková
komora pro těsnicí rotující kapalinový
prstenec. Horní část rozváděcího prostoru,
upraveného ve snímačovém tělese rotující
části a spojeného se vstupním prostorem
rotorové části, je propojovacím kaná­
lem připojena na výše uloženou kapalinovou
vyrovnávací nádržku.
Patent CS-260325-B1 (CS)
Inventor: SUROVCIK RUDOLF
IPC: B27G19/02
Filed: 1986-12-22
Abstract: Riešene sa týká zapojenia pre dialkové ovládanie
pomocných prvkov, ako sú clony
oblúkovej pece, priamo cez napájecí kábel
zavážacieho stroja. Podstatou riešenia je využitie
usmernenej polvlny na dióde. K fázi
motora zavážacieho stroja sú připojené prvé
vývody prvého tlačítka a druhého· tlačítka,
pričom na druhý vývod prvého tlačítka je
připojená anoda prvej diódy, ktorej katoda
je připojená súčasne na anodu druhej diódy,
ktorej katoda je připojená na druhý vývod
druhéhoi tlačítka, na anodu tretej diódy, pripojenej
katodou cez vinutie prvého relé na
zem a na katódu štvrtej diódy, ktorej anoda
je cez vinutie druhého relé připojená na
zem, přitom kontakty prvého a druhého relé
sú zapojené v obvodoch prvého stykača a
druhého stykača pre spínanie pomocných
prvkov oblúkovej pece.
Patent DK-168629-B1 (DK)
Inventor: GALL RUDI
IPC: C07F9/38
Filed: 1987-07-07
Granted: 1994-05-09
Abstract: The present invention provides disphosphonates of the general formula:   <IMAGE> (I)  wherein R1 is a straight-chain or branched, saturated or unsaturated aliphatic hydrocarbon radical of 1-9 carbon atoms which is optionally substituted by phenyl or cyclohexyl, R2 is cyclohexyl or cyclohexylmethyl, benzyl or a straight-chained or branched, saturated or unsaturated aliphatic hydrocarbon of 4 to 18 carbon atoms which is optionally substituted by phenyl or oxygen wherein the oxygen can be esterified or etherified, R3 is hydrogen or a straight-chain or branched alkyl of 1-4 carbon atoms, X is a straight-chain or branched alkylene chain of 1-6 carbon atoms and Y is hydrogen, hydroxyl or an amino group optionally substituted by alkyl radicals of 1-6 carbon atoms; as well as the pharmacologically acceptable salts thereof. The present invention also provides processes for the preparation of these diphosphonic acid derivatives and pharmaceutical compositions containing them for the prophyllaxis treatment of diseases or disturbances of calcium metabolism such as osteoporsis, Pagets disease, Bechterew's disease, bone metastases, urolithiasis, heterotropic ossifications, rheumatoid arthritis, osteoarthritis and degenerative arthrosis.
Patent DK-169282-B1 (DK)
Title: Screw propeller boss with fins - has fins equal in number to blades of propeller, mounted so that their leading edges fall between blade roots
Inventor: OGURA MICHIHITO
IPC: B63H1/28
Filed: 1987-08-05
Granted: 1994-10-03
Abstract: The boss of the screw propeller has a cap with fins (64) mounted on it, there being the same number of fins as there are blades on the propeller. The fins have a pitch angle (Alpha) such that Alpha minus Epsilon lies between minus twenty degrees and plus thirty degrees where Epsilon is the pitch angle of the propeller blade at its root. The leading edge of each fin is located between adjacent propeller blade roots and the fins have a maximum diameter which lies between the cap diameter and a third of the propeller diameter. The fins reduce the wake turbulence from the propeller.
Patent DK-167439-B1 (DK)
Inventor: GRELL WOLFGANG
IPC: A61K31/395
Filed: 1984-12-20
Granted: 1993-11-01
Abstract: 1. Two new solid forms of 2-ethoxy-4-[N-(1-(2-piperidino- phenyl)-3-methyl-1-butyl)-aminocarbonylmethyl]-benzoic acid, the form designated (B) being characterised by the melting point of 140-142 degrees C and by the IR(KBr) spectrum according to Figure B' and the form designated (C) being characterised by a melting point of 75-85 degrees C and by the IR(KBr) spectrum according to Figure C'.
Patent DK-171662-B1 (DK)
Title: High frequency source
Inventor: OECHSNER HANS
IPC: H01J27/18
Filed: 1988-11-17
Granted: 1997-03-03
Abstract: PCT No. PCT/DE88/00152 Sec. 371 Date Nov. 20, 1989 Sec. 102(e) Date Nov. 20, 1989 PCT Filed Mar. 16, 1988 PCT Pub. No. WO88/07259 PCT Pub. Date Sep. 22, 1988.A high-frequency ion source for the production of an ion beam using electron cyclotron resonance has a tubular vessel whose shape matches the desired shape of the beam. The vessel, which is designed to accommodate an ionizable gas, is surrounded by a coil, and the coil is coupled to a high-frequency generator via a resonant circuit. A Helmholtz coil pair matched to the shape of the vessel is arranged to generate a magnetic field which is directed normal to the axis of the coil surrounding the vessel. The vessel is clamped between two plates and one of the plates contains a system for extracting ions from the vessel. The extraction system includes a plurality of spaced electrodes which function to attract and accelerate ions. The electrodes are formed with slotted openings which shape a stream of ions flowing out of the vessel into the form of a flat beam. An additional electrode can be provided to suppress the escape of electrons from the beam back into the vessel.
Patent IE-65825-B1 (IE)
Title: Somatostatin analogues
Inventor: SCHALLY ANDREW V
IPC: A61K38/04
Filed: 1991-04-05
Abstract: There are disclosed two, cytotoxic, structurally closely related groups of compounds, namely compounds of the formula: <IMAGE> wherein R<1> is L or D-Phe, D-Trp, L or D-Mel, R<3> is Mel, Tyr or Phe, R<6> is Thr or Val,  R<8> is Thr, Trp or Mel, Q is selected from the group consisting of hydrogen, L and D-Mel, Mel-Mel dipeptide, cyclopropanealkanoyl, aziridine-2-carbonyl, methotrexoyl, 1,4-naphthoquinone-5-oxycarbonylethyl, epoxyalkyl and the  OMEGA -carbonyl-alkylamino derivatives thereof; and the  OMEGA -carbonyl-alkanoyl derivatives of 2-hydroxymethyl-anthraquinone, doxorubicin, esperamycin, and mitomycin C ; wherein the  OMEGA -carbonyl-alkylamino group has the formula -CO-(CH2)n-NH- where n is 2-6, and the  OMEGA -carbonyl-alkanoyl group has the formula -CO-(CH2)n-CO- where n is 2-6, and compounds of formula <IMAGE> wherein R<1> is L or D-Phe, L or D-Trp, R<3> is Phe or Tyr, R<6> is Val or Thr, R<8> is Thr or Trp, A is a diaminoacyl residue having the formula -HNCH2-(CH2)m-CH(NH)-(CH2)n-CO- where m is 0 or 1 and n is 0 or 1, Q<1> is a cytotoxic moiety having the formula Q<2> or (B)2Q<3> or (Q<4>)2 wherein Q<2> is Pt(Y)2, where Y is an anion of pharmaceutically acceptable acid, Q<3> is a non-platinum-group metal, selected from the group consisting of titanium, vanadium, iron, copper, cobalt, gold, nickel, cadmium and zinc, Q<4> is selected from the group consisting of L or D-Mel, Mel-Mel dipeptide, cyclopropanealkanoyl, aziridine-2-carbonyl, epoxyalkyl, 1,4-naphthoquinone-5-oxycarbonylethyl or the  OMEGA -carbonyl-alkylamino derivatives thereof; the  OMEGA -carbonylalkanoyl derivatives of 2-hydroxymethyl-anthraquinone, doxorubicin, esperamycin and mitomycin C, wherein the  OMEGA -carbonyl-alkylamino group has the formula -CO-(CH2)n-NH- where n is 2-6 and the  OMEGA -carbonyl-alkanoyl group has the formula -CO-(CH2)n-CO- where n is 2-6, B is a substituted aralkylidene or heteroaralkylidene selected from the group consisting of halo and nitrophenyl lower-alkylidenes; lower alkyl hydroxymethyl or phosphoxymethyl pyridyl lower alkylidenes, wherein lower alk- means 1-6 carbon atoms and the salts thereof with pharmaceutically acceptable acids and bases.
Patent IE-48468-B1 (IE)
Title: Improvements in self-sealing pneumatic tyres
IPC: B29C73/18
Filed: 1979-08-08
Abstract: A pneumatic tire whose inner wall is provided beneath the crown with a lining which extends at least from one shoulder to the other of the tread and comprises a layer of a sealing mixture capable of flowing into a puncture hole, the layer being covered radially inward by a vulcanized elastomeric partition, is improved due to the fact that the layer of sealing mixture has a base of at least one elastomer of low molecular weight, preferably less than 30,000, mixed with at least one thermosetting resin, and due to the fact that at least one cross-linking agent or hardener for the thermosetting resin is isolated from the layer of sealing mixture by means of a vulcanized elastomeric partition arraged radially inward of the layer of sealing mixture.
Patent IE-32894-B1 (IE)
Title: Benzodiazepine derivatives and process for preparing the same
IPC: C07C233/00
Filed: 1968-11-26
Abstract: Novel 5-phenyl(or substituted phenyl)-2,3,4,5-tetrahydro-1H-1,4-benzodiazepine-2-one derivatives. These novel compounds are characterized by their psychosedative properties, especially they show tranquilizing and antidepressant properties and, thus, they are useful as a minor tranquilizer. Such benzodiazepine base is prepared by reaction of corresponding 2-substituted acylaminobenzophenone derivative with appropriate primary amine derivative.
[US3772371A]
Patent IE-53933-B1 (IE)
Title: Dosage inhalator
IPC: A61M15/00
Filed: 1982-06-23
Abstract: A powder inhalator which is activated by the air flow generated at inhalation and which is intended for inhalation of solid pharmacologically active compound in micronized form, said inhalator comprising a nozzle 2, an air conduit 6, a dosing unit 10 comprising a storage chamber 5 for the active compound and dosing means 8, and a maneuvering unit 1, characterized in that the dosing unit 10 comprises a storage chamber 5 for the active compound, a perforated membrane 4, a holder 9 for the said perforated membrane, and dosing means 8 for introducing active compound into the perforations in the perforated membrane 4, whereby means are arranged for displacing the membrane 4 in relation to the dosing means 8, whereby in a first position solid active compound in micronized form is introduced into the perforations in part of the area of the membrane 4 and in a second position the said part of the membrane 4 is inserted in the air conduit 6 for the air to be inhaled.
Patent IE-37197-B1 (IE)
Title: A pipe connection with clamping ring
IPC: F16L47/10
Filed: 1972-12-01
Abstract: A pipe connection of a penetrating and a receiving pipe part, and a sealing lip connected with a body part which is held by a clamping ring removably connected with the receiving pipe part. A cavity is present between the inner front side of the clamping ring and the body part.
[US3857589A]
Patent IE-54675-B1 (IE)
Title: Improvements relating to data transmission
IPC: H04N19/00
Filed: 1983-07-25
Abstract: A conditional replenishment video data transmission system involves the transmission of updating digital data for clusters of consecutive picture elements, all or most of which show a change since the previous frame, in lines of a raster over an image to be transmitted. The lines of the raster are numbered cyclically in groups of 8, the numbers being part of line synchronizing code words, and the position along a line of the first element of each cluster is identified by a number. The data are transmitted at a constant rate from a transmitter buffer to a receiver buffer and an auxiliary data store records the addresses of the line synchronizing code words in the receiver buffer. The address of the receiver buffer read by a reading means can be corrected by reference to the address data in the auxiliary storage means if for example the line numbers do not follow in sequence or the element addresses are not in ascending order due to corruption during transmission. Alternatively, the reading means may be controlled at all times by the address data in the auxiliary storage means and not only when a tracking error has occurred. The tracking of the received data in the receiver buffer by the reading means may show a consistent error relative to the position predicted by the assumed transmission delay time; preferably such tracking errors are corrected by a whole frame jump using a receiver buffer of more than one frame capacity.
Patent IE-65973-B1 (IE)
Title: Container and closure
Inventor: KING ROGER MILNER
IPC: B65D41/04
Filed: 1991-05-22
Abstract: A container neck (14) and a container closure comprises a first thread (15) on one of the neck and the closure, a complementary second thread on the other of the neck and the closure such that the closure is movable from fully disengaged from the neck to fully closed by turning the closure relative to the neck by less than 360 DEG , at least one stop formation (17, 18) carried by said one of the neck (14) and the closure, and stop means on said other of the neck and the closure engageable with the stop formation or at least one of the stop formations to hold the closure in a closed position on the neck. The arrangement of the or each stop formation (17, 18), the stop means and the threads is such that the stop means is rotated past the stop formation or at least one of the stop formations (17, 18) without engagement therewith when the closure is screwed on to the neck, engagement of the stop means with the stop formation or at least one of the stop formations commencing only when the closed position is neared.
Patent IE-61456-B1 (IE)
Title: Flavor delivery system for fat free foods
Inventor: SINGER NORMAN S
IPC: A23L35/00
Filed: 1989-07-06
Abstract: Methods are provided for the delivery of fat soluble flavor compounds into nonfat and low-fat food products in which fat components have been replaced by non-lipid fat substitutes. A flavor delivery system comprising fat globules into which elevated levels of fat soluble flavor compounds have been loaded is incorporated into nonfat and low-fat food products in order that fat soluble flavor compounds are released in a more natural and familiar sequence.
Patent IE-50669-B1 (IE)
Title: Sleeve for protecting splices in electric or telephone cables
IPC: H02G15/113
Filed: 1980-11-14
Abstract: The sleeve for protecting the splice (4) of telephone cables (2 and 3) comprises two semi shells (1a, 1b) assembled by their adjacent edges, about the splice (4). Said adjacent edges comprise a groove defining in the assembly position a channel, means being provided to inject in the channel a pasty material providing a sealing relationship between said adjacent edges. The opposite ends (9, 10) of the sleeve comprise jaws (11, 12, 13) to axially fix the ends of the cables (2, 3) to the sleeve and means to effect a sealing relationship between these cables and these ends (9, 10) of the sleeve. Each end carries at least two removable jaws (11, 12) defining together a chamber (18) communicating with the above-mentioned channel. Application to the protection of telephone cables against moisture.
Patent IE-54512-B1 (IE)
Title: 2,3-dihydro-1h-imidazolecarboxamides and thiocarboxamides
IPC: A61K31/44
Filed: 1982-11-02
Abstract: Novel imidazolecarboxamides of the following structure are useful as antiallergy agents <CHEM> wherein Q and T are oxygen or a divalent sulfur; R is hydrogen, C14 alkyl, C14 alkylcarbonyl or benzoyl; R1 is hydrogen, lower alkyl or CF3; R2 is NH2, -NH(R5) or-N(R5)(R6); R5 is C14 alkyl, pyridinyl, phenyl or substituted phenyl; R6 is C14 alkyl and the pharmaceutically acceptable salts thereof.
Patent IE-63284-B1 (IE)
Title: Azetidinyl quinolone carboxylic acids and esters
Inventor: NAKANISHI SUSUMU
IPC: A61K31/47
Filed: 1988-10-25
Abstract: Quinoline derivs. of formula (I) and their pharmaceutically acceptable salts are new. - In (I), R1 = OH, 1-6C alkoxy or NR4R5; R4 and R5 = H or 1-6C alkyl; R2 = H, OH, 1-6C alkanoylamino, morpholine, halo, CN, 1-6C hydroxyalkyl, COOR6, 1-6C alkoxy or NR7R8; R6 = H or 1-6C alkyl; R7 and R8 = H, 1-6C alkyl, 2-6C aminoalkyl, 2-6C alkylamin-(2-6C)alkyl or di(1-6C alkyl)amino-(1-6C)alkyl; R3 = H, 1-6C alkyl or phenyl (opt. substd. by 1-2 of 1-6C alkyl, NO2, NH2, halo, 1-2C alkyl substd. by 1-5 halo, OH, or 1-6C alkoxy. Pref. R1 = NH2 or esp. OH; R2 = H, NH2, OH, acetylamino, CH2OH or COOR6 (esp. H, NH2 or OH); R6 = H; R3 = H or phenyl; and salt = alkali(ne earth) metal salt. - 6 Cpds. (I) viz. 1-cyclopropyl- 6-fluoro-1,4-dihydro-7-Q-4-oxo-3- quinolinecarboxylic acid (Q = 1-azetidinyl, 3-hydroxy-1-azetidinylm 3-amino-1-azetidinyl, 3-acetyl amino-1-azetidinyl, 2-methyl-3-methyl-1-azetidinyl or 2-phenyl-3-amino-1-azetidinyl are specifically claimed.
Patent IE-74858-B1 (IE)
Title: N-aryl and N-cycloalkyl neoalkanamide insect repellents
Inventor: STELTENKAMP ROBET J
IPC: A61K8/00
Filed: 1992-02-18
Abstract: N-monosubstituted neoalkanamides of 11 to 14 carbon atoms wherein the substituent on the amide nitrogen is cyclic (aromatic or cycloaliphatic, such as aryl or cycloalkyl) and of at least five carbon atoms, have been discovered to be insect repellent, providing that any aromatic substituent is unsubstituted at the ortho position and that when the neoalkanoyl moiety is pivaloyl the total number of carbon atoms in the N-cyclic neoalkanamide is at least 12. Such neoalkanamides are useful as repellents against cockroaches, including American, German and Oriental cockroaches, and are also effective against mosquitoes (both Anopheles and Aedes), black flies and carpenter ants, and to some extent against deer ticks. They may be applied to areas, locations and items which are desirably to be kept free of such insects, with applications being direct or of solutions or emulsions thereof, preferably by spraying, or in detergent compositions or other products to be applied to such areas, etc. Because the described neoalkanamides are desirably substantive to surfaces and are usually in liquid state, they give long lasting repellency to such areas, etc., and tests have shown them to be sufficiently long lasting.
Patent LU-100111-B1 (LU)
Title: Universal portable vegetable seeder
Inventor: WU LIQING
IPC: A01C7/02
Filed: 2017-03-07
Granted: 2017-06-19
Abstract: The present invention discloses a universal portable vegetable seeder, comprising: a seed cup (1), an outlet (10), a connecting rod (13) and a handle (16), characterized in that: the handle (16) is connected to a cup neck (2) through the connecting rod (13), the seed cup (1) is arranged above the cup neck (2), and a hopper (9) is arranged below the cup neck (2), and the outlet (10) is arranged below the hopper (9); a handle switch (15) is arranged on the handle (16), a stay cord (12) is connected on the handle switch (15) and the stay cord (12) passes through the inside of the connecting rod (13), the other end of the stay cord (12) is connected to a sieve sheet connector (14) after passing around a roller (11), the sieve sheet connector (14) is connected to a sieve sheet (5), a sieve support (6) is arranged below the sieve sheet (5), a sieve support base plate (7) is arranged below the sieve support (6), a sieve support spring (8) is arranged between the sieve support (6) and the sieve support base plate (7); and a sieve groove (55) is arranged on the sieve sheet (5), and the sieve groove (55) is provided with a sieve hole (52). The present invention provides a high-precision seeder which can prevent the damage of seeds.