baber/WOPTO huggingface dataset:
Patent CN-100451399-C (CN)
Title: 车轴齿轮箱换档锁定机构
Inventor: SHENG LI
IPC: F16H57/023
Filed: 2007-02-12
Granted: 2009-01-14
Abstract: 本发明公开了一种用于轨道式液压驱动车轴齿轮箱的车轴齿轮箱换档锁定机构，它包括装连在箱体上的拨动机构、啮合套和带有外花键的主动齿轮轴，拨动机构传动连接啮合套，啮合套具有内花键，啮合套的内孔壁具有空档凹槽，主动齿轮轴的一端串接有花键轴，花键轴上具有外花键，且外花键与主动齿轮轴的外花键相对应，花键轴上设有定位件及其定位弹簧，啮合套端部还设置有挂档面或挂档凹槽，当啮合套的内花键同时与主动齿轮轴上的外花键及花键轴上的外花键啮合，为挂档状态，定位件与啮合套的挂档面或挂档凹槽相配合；当啮合套的内花键只与花键轴上的外花键啮合，为空档状态，定位件与啮合套的空档凹槽相配合。本发明易于制造，结构合理，档位锁定可靠。
Patent CN-100539433-C (CN)
Title: 一种数模转换中用于内插滤波的半带滤波方法
Inventor: RUN CHEN
IPC: H03M1/66
Filed: 2007-03-30
Granted: 2009-09-09
Abstract: 本发明涉及一种数模转换中用于内插滤波的半带滤波方法，属于信号处理技术领域。这种半带滤波方法采用系数混合基分解方式，同时结合多相滤波的思想，通过延迟寄存、首尾相加、采样保持、加权求和、调制累加以及抽取和增益缩放等步骤将待处理信号进行半带滤波。本发明的优点是：本发明的半带滤波采用系数混合基分解的方法，同时结合多相滤波，不产生很长的移位操作，大大提高了数据转换精度，而且又不增加时序控制的复杂程度；使用本发明方法设计的半带滤波器，便于流程化与模块化设计，同时使硬件、版图布局更加规整，为滤波器系统的自动化设计与综合提供了研究与实践基础。
Patent CN-100531862-C (CN)
Inventor: XIANGLIN SHEN
IPC: B01D51/02
Filed: 2007-09-18
Granted: 2009-08-26
Abstract: 基于声波和外加种子颗粒联合作用脱除可吸入颗粒PM 2.5 的装置和方法涉及一套脱除含尘气流中粒径小于2.5微米的可吸入颗粒物(以下简称PM 2.5 )的装置和方法，它由声源、声波团聚室和种子颗粒供给装置，以及后续常规除尘设备等组成。在各类燃烧源排放的烟气或者其它含尘气流流经声波团聚室时，气流中的细颗粒在声波作用下发生不同程度的夹带，而加入的种子颗粒由于惯性较大几乎不发生夹带，同时细颗粒和种子颗粒间的重力沉降和声致漂移也存在差异，这三个因素促使两者间产生相对运动，使气流中可吸入颗粒PM 2.5 和种子颗粒间产生很高的碰撞率。可吸入颗粒PM 2.5 与种子颗粒碰撞后，两者发生团聚，团聚生成的团聚体由后续的常规除尘设备进一步加以脱除。
Patent CN-100565413-C (CN)
Title: 一种温度调节的方法和装置
Inventor: KEGUO YAN
IPC: G05D23/19
Filed: 2008-01-30
Granted: 2009-12-02
Abstract: 本发明公开了一种温度调节的方法，包括：测量当前温度值并根据当前温度值获取偏差e；当第二偏差阈值＜|e|≤第一偏差阈值时，调整P、I和D，增加控制中的比例作用和积分作用，减弱微分作用；当0≤|e|≤第二偏差阈值时，调整P、I和D，减弱控制中的比例作用、积分作用和微分作用；根据第三偏差阈值A和偏差e，调整积分作用强度因子；根据调整后的P、I、D和积分作用强度因子，获取控制量的增量，并根据控制量的增量对温度进行调节。本发明还公开了一种温度调节的装置。本发明可以有效地降低温度控制过程中发生的过冲和振荡现象。
Patent MX-3291-E (MX)
Title: Procedimiento para preparar analogos de prostaglandinas
Inventor: YANKEE ERNEST WARREN
IPC: C07C405/00
Filed: 1976-03-10
Abstract: La presente invención se refiere a un procedimiento para preparar análogos de prostaglandinas de la fórmula: (VER GACETA) o una mezcla que comprende ese compuesto y el enantiómero del mismo; (VER GACETA) en donde Y es de 3 a 5 inclusive; en donde n es de 2 a 6, inclusive; en donde M1 es (VER GACETA) y en donde R1 es hidrógeno, alquilo de uno a 12 átomos de carbono, inclusive, cicloalquilo de 3 a 10 átomos de carbono, inclusive, aralquilo de 7 a 12 átomos de carbono, inclusive, fenilo, fenilo substituido con uno, 2, ó 3 cloros o alquilo de uno a 4 átomos de carbono, inclusive, o un catión farmacológicamente aceptable; que comprende: (1) acilar todas las porciones hidroxi de una lactona ópticamente activa de la fórmula: (VER GACETA) o una mezcla que comprende esa lactona y su enantiómero, en donde M5 es una mezcla de:(VER GACETA) y n es como se definió antes, por lo tanto preparando un compuesto de la fórmula:(VER GACETA) o una mezcla que comprende ese compuesto y su enantiómero, en donde M4 es una mezcla de:(VER GACETA) en donde R9 es un grupo de separación de acilo, y n es como se definió antes; (2) separar cromatográficamente la mezcla epimérica del producto de reacción de la etapa 1; (3) desacilar el producto de reacción de la etapa 2; (4) hidrogenar catalíticamente el producto de reacción de la etapa 4; (5) reducir el producto de reacción de la etapa 4 a un lactol; (6) alquilar el producto de reacción de la etapa 5 empleando una sal de fosfonio de la fórmula:(VER GACETA); (7) transformar el hidrógeno carboxi del producto de reacción de la etapa 6 a una porción R1 preparando por lo tanto dicho compuesto o una mezcla que   comprende dicho compuesto y su enantiómero en donde (VER GACETA) y realizar opcionalmente una de las etapas adicionales 8-11, que consisten de: (8) sililar selectivamente el producto de reacción de la etapa 7 en C11, oxidar el derivado de sililo así producido, e hidrolizar el grupo sililo, preparando por lo tanto dicho compuesto o una mezcla que comprende dicho compuesto y su enantiómero, en donde (VER GACETA) es (VER GACETA) (9) deshidratar el producto de reacción de la etapa 8 bajo condiciones básicas; preparando por lo tanto dicho compuesto o una mezcla que comprende dicho compuesto en donde (VER GACETA) (10) deshidratar el producto de reacción de la etapa 8 bajo condiciones ácidas, preparando por lo tanto dicho compuesto o una mezcla que comprende dicho compuesto y el enantiómero del mismo, en donde:(VER GACETA) es; y (11) reducir el producto de reacción de la etapa 8, y posteriormente separar el compuesto 9-beta-hidroxi de la mezcla epimérica así producido, preparando por lo tanto dicho compuesto o una mezcla que comprende dicho compuesto y el enantiómero del mismo, en donde (VER GACETA) es: (VER GACETA).
Patent PT-1353681-E (PT)
Title: Bifidobacteria capable of preventing diarrhea
Inventor: RENIERO ROBERTO
IPC: A61K35/745
Filed: 2000-07-26
Abstract: The present invention pertains to the use of microorganisms belonging to the genus Bifidobacterium for preparing a carrier for the treatment or prophylaxis of diarrhea. The invention also relates to food or pharmaceutical compositions containing such microorganisms.
Patent PT-2278012-E (PT)
Title: Immunogenic dengue 2 virus chimeras
Inventor: KINNEY RICHARD M
IPC: C12N15/40
Filed: 2001-02-16
Abstract: Chimeric flaviviruses that are avirulent and immunogenic are provided. The chimeric viruses are constructed to contain amino acid mutations in the nonstructural proteins of a flavivirus. Chimeric viruses containing the attenuation-mutated nonstructural genes of the virus are used as a backbone into which the structural protein genes of a second flavivirus strain are inserted. These chimeric viruses elicit pronounced immunogenicity yet lack the accompanying clinical symptoms of viral disease. The attenuated chimeric viruses are effective as immunogens or vaccines and may be combined in a pharmaceutical composition to confer simultaneous immunity against several strains of pathogenic flaviviruses.
Patent PT-1313819-E (PT)
Inventor: SIEBER RETO
IPC: C09J7/20
Filed: 2001-03-14
Abstract: The invention relates to a self-adhesive film for adhering a floor covering, especially a carpeting, to a floor or to a step. Said self-adhesive film comprises a supporting layer, which is coated with a pressure-sensitive adhesive coating on an upper surface facing the floor covering and on a lower surface facing the floor or the steps. According to the invention, the self-adhesive film is permeable to water vapor with an Sd value of 15 m or less, the supporting layer is made of a plastic film, and at least the supporting layer is perforated.
Patent PT-1372633-E (PT)
Inventor: ROBERT HAHN
IPC: A61K31/197
Filed: 2002-03-15
Abstract: A surgical irrigating fluid composition, especially for endoscopic surgery, is provided comprising a rinsing fluid and nitrous oxide added as a marker to the rinsing fluid in an amount which is detectable in the expired breath from a mammal, especially man, that is subjected to the surgery.
Patent PT-1441724-E (PT)
Title: Methods of increasing endogenous testosterone levels
Inventor: MCKENNA SEAN
IPC: A61K31/415
Filed: 2002-09-27
Abstract: The present invention relates to the use of substituted pyrazole compounds to increase endogenous testosterone production. Compounds of the invention are useful for the treatment of conditions, disorders or diseases which would benefit patients by increasing endogenous testosterone levels.
Patent PT-1386617-E (PT)
Title: Method for the in vitro diagnosis of type ii porcine circovirus infection and diagnostic reagents
Inventor: ALLAN GORDON
IPC: C12N15/34
Filed: 1998-10-01
Abstract: A purified preparation of type II porcine circovirus (PCV). Independent claims are also included for the following: (a) preparation of PCV (i) isolated from a physiological or tissue sample, particularly from a lesion, from a pig with symptoms of PMWS (porcine multisystemic wasting syndrome); or (ii) produced by, and isolated from, in vitro cell cultures infected with the virus of (i); (b) extract or culture supernatant, or antigen preparation, optionally purified, collected from in vitro cultures of cells infected with PCV; (c) vaccine containing the products of (b); (d) DNA fragments (A) of 1767 bp (1), 1767 bp (2), 1767 bp (3), 1768 bp (4) or 1768 bp (6), or containing an open reading frame (ORF) of PCV; (e) polypeptides (I) encoded by (A) or these ORF; (f) in vitro expression vector containing (A), or these ORFs; (g) polypeptides (Ia), optionally purified, expressed from the vector of (f); (h) subunit vaccine containing at least one (I) or (Ia), diluent or vehicle and optionally an adjuvant; (i) in vivo expression vector, integrated into a genome, containing (A) or the ORFs; (j) live or plasmid vaccine containing the vector of (j), and a diluent or vehicle; (k) probe or primer containing all or part of (A) or the ORFs; (l) mono- or poly-clonal antibodies raised against PCV, (I), (Ia) or their fragments; and (m) detection of PCV by identifying in a body fluid or tissue sample an antigen or antibody specific for the antigen. ACTIVITY : Antiviral. MECHANISM OF ACTION : Induction of an immune response against porcine circovirus; vaccine.
Patent PT-1433877-E (PT)
Title: Pretreatment method for coating
Inventor: MATSUKAWA MASAHIKO
IPC: C23C22/34
Filed: 2003-12-23
Abstract: It is an object of the present invention to provide a pretreatment method for coating, which does not limit a coating method, places a less burden on the environment and can apply good chemical conversion treatment to all metals such as iron, zinc, aluminum and so on. <??>A pretreatment method for coating comprising treating a substance to be treated by a chemical conversion coating agent to form a chemical conversion coat, wherein the chemical conversion coating agent comprises: at least one kind selected from the group consisting of zirconium, titanium and hafnium; fluorine; and at least one kind selected from the group consisting of amino group-containing silane coupling agents, hydrolysates thereof and polymers thereof.
Patent PT-1426000-E (PT)
Inventor: LANAO GOMEZ ANTONI
IPC: A47J31/44
Filed: 2003-11-28
Abstract: A milk emulsifier for use on industrial coffee machines, which consists of four parts configured as a rubber stopper (1), a cylindrical tube (2), a nozzle (3) and an outlet nozzle (4), which are attached after unscrewing the nozzle of the steam tube (10) to the industrial coffee machine, allowing emulsification of the milk. <IMAGE>
Patent PT-1486807-E (PT)
Title: Multiple delay line based on an awg and different sections of a dispersive optical medium
Inventor: SENDRA JAVIER MARTI
IPC: G02B6/12
Filed: 2003-03-14
Abstract: Multiple delay line based on AWG with a feedback configuration by means of sections of a dispersive optical medium, in which, due to the effect of the dispersion of the sections of the dispersive optical medium, the use of simultaneous multiple wavelengths (WDM) allows a large number of delays to be achieved, that can be optically varied by means of the individual or joint tuning of the multiple wavelengths. The application of the present invention is in any field in which it is necessary to obtain a large number of delays for example, such as occurs in the field of optical shaping of beams for antenna grouping. Other fields of application are analogue-digital optical converters, optical time division multiplexing (OTDM) or the optical systems based on code multiplexing (CDMA). <IMAGE>
Patent PT-1586383-E (PT)
Title: Liquid dispensing device
Inventor: ENGELEN WIM
IPC: B05B9/08
Filed: 2004-04-15
Abstract: The present invention is related to a battery-operated liquid dispensing device comprising a valve which is operated by the trigger (4), and which comprises a valve body (22) with a resilient dome-shaped portion (24), which closes off the valve by being biased against the valve seat (25). By pulling the trigger (4), the dome-shaped portion (24) is pushed away from the seat (25), thereby creating a passage for the liquid to pass to a gear pump and nozzle (5). <IMAGE>
Patent PT-1608420-E (PT)
Title: An infusion device and an adhesive sheet material and a release liner
Inventor: NIELSEN JENS EGEBJERG
IPC: A61F13/02
Filed: 2004-03-31
Abstract: An infusion device (1) comprising a housing (3) with an upper face plate (4) and a lower face plate (5) and a cannula (6) connected to the lower face plate (5) and through which a liquid is injected into the skin of a user; means for injecting the liquid and an adhesive sheet material (101) placed in connection with the lower face plate (5) and for securing the infusion device (1) to the skin, said adhesive sheet material (101) comprising a backing layer (102) which has, on a portion of one surface, an adhesive layer (103), said adhesive lacer (103) being covered by a removable release liner (104), said sheet and release liner (104) comprising a central aperture (105) through which the cannula (6) may act, and wherein the release liner (104) comprises at least one score line (106), wherein the starting point (107) for the score line (106) for stripping it off the adhesive layer (103) is placed in the periphery (108) of the release liner (104) and wherein the score line (106) is an unbroken line that does not intersect itself and continues to an end point placed on the border of the periphery (110) of the release liner's central aperture (105). Hereby a release liner (104) is obtained that can be removed in one piece as a strip, thereby reducing the risk of the user handling the product erroneously; and, likewise, little force is needed to remove the strip since, other things being equal, the adhesive force is all that needs to be overcome in the piece of strip which the user is currently in the process of removing.
Patent PT-1582824-E (PT)
Title: Device for flow management in combined heating units for sanitary water and house rooms and boiler unit for combined heating of sanitary water and house rooms
Inventor: GALLUS GIOVANNI LUCA
IPC: F24H1/52
Filed: 2005-02-21
Abstract: Boiler unit including a first circuit for heating of heat-transferring fluid to be sent to a heating system (17) for house rooms and a second circuit for heating of sanitary water to be sent to sanitary water users (16) with said first circuit including a primary heat exchanger (14) for heating the heat-transferring fluid and said second circuit including a secondary heat exchanger (21) for heating sanitary water with said boiler unit including detection means (24) of the required heated sanitary water flow and means (22, 23) of diverting from said first circuit a fraction of the flow of the heat-transferring fluid to send it to the secondary heat exchanger (21) with said diversion means (22, 23) being controlled by control means (26) connected to the detection means (24) to regulate the size of said fraction as a function of the detected sanitary water flow requirement.
Patent PT-1792888-E (PT)
Title: Method for producing aminothiazole derivative and production intermediate
Inventor: NAGASAWA MASAAKI
IPC: C07C51/377
Filed: 2005-08-23
Abstract: A compound represented by formula (3):   
(wherein ring A represents a benzene ring or a 6-membered aromatic heterocycle; R 1  represents a hydrogen atom, a C 1-6  alkyl group, a halogen atom, a nitro group, an amino group, a mono-C 1-6  alkylamino group, or a di-C 1-6  alkylamino group; at least one of R 2 , R 3 , and R 4  represents a methoxy group, and the rest each represents a hydrogen atom, a C 1-6  alkyl group, a halogen atom, a nitro group, an amino group, a mono-C 1-6  alkylamino group, or a di-C 1-6  alkylamino group; and R 5  represents a hydrogen atom or an electron-withdrawing group selected from a halogen atom, a nitro group, a trifluoromethyl group, a trichloromethyl group, a cyano group, an acetyl group, a sulfonic acid group, and an alkylsulfonic acid group).
Patent PT-1867823-E (PT)
Title: A method for mounting a drive assembly for door or window frames
Inventor: VINADIO AIMONE BALBO DI
IPC: E05D15/52
Filed: 2007-05-18
Abstract: Method for mounting an auxiliary member (130) on a window or door frame (10) already installed and whereon is mounted a drive assembly (22) comprising at least one actuating member (24, 25, 26, 27, 28) and at least one transmission rod (30, 32) mounted in at least one slot (18, 20) of the frame (10). The method comprises the steps of: 
- providing, between the auxiliary member (130) and said rod (30, 32), a coupling that is slidable in a longitudinal direction and fixed in any direction orthogonal to the direction of sliding, and 
- forming a through hole (118) in the rod by means of a screw (106) carried by the auxiliary member (130), and fastening the auxiliary member to said rod (30, 32) by the engagement of a tip (110) of said screw (106) with said through hole (118).
Patent PT-2180011-E (PT)
Title: Moisture-setting polyisocyanate mixtures
Inventor: WAMPRECHT CHRISTIAN
IPC: C08G18/72
Filed: 2009-10-09
Abstract: Solvent-containing polyisocyanate mixture (I) comprises: (a) tolylene diisocyanate (TDI) component comprising TDI isocyanurate polyisocyanates; (b) aliphatic and/or cycloaliphatic isocyanate component comprising aliphatic and/or cycloaliphatic polyisocyanates; and the reaction product of at least one of components (a) and/or (b) with (c) at least one polyether polyol having a number-average molecular weight of 500-4000 g/mol that contains at least one tertiary nitrogen atom; and (d) optionally at least one polyether polyol that does not contain nitrogen atoms. Solvent-containing polyisocyanate mixture (I) having a solvent content of less than 50 wt. % at a runout viscosity at 23[deg] C of 20 s, an isocyanate groups (NCO) content of 7-15 wt. %, a content of monomeric TDI of less than 0.2 wt. %, and a content of monomeric aliphatic and/or cycloaliphatic isocyanates of less than 0.2 wt. %, where the mixture comprises: (a) TDI component comprising TDI isocyanurate polyisocyanates; (b) aliphatic and/or cycloaliphatic isocyanate component comprising aliphatic and/or cycloaliphatic polyisocyanates; and the reaction product of at least one of components (a) and/or (b) with (c) at least one polyether polyol having a number-average molecular weight of 500-4000 g/mol that contains at least one tertiary nitrogen atom; and (d) optionally at least one polyether polyol that does not contain nitrogen atoms. Independent claims are included for: (1) preparing (I), where the prepolymer mixture of (a) and (b) is prepared by reacting at least one of the two components (a) and/or (b) with (c) and (d) in the presence of organic solvents; (2) a coating comprising (I), a catalyst that accelerates the reaction of free NCO groups with moisture, and one or more auxiliary substances and additives; and (3) a substrate coated with a coating comprising (I).
Patent PT-624321-E (PT)
Inventor: BATTARD JEAN-CLAUDE
IPC: A24B15/28
Filed: 1994-04-26
Abstract: Smoking article (cigar or cigarette) containing at least one smoking material chosen from among natural tobacco, reconstituted tobacco and tobacco substitutes comprising natural or synthetic non-tobacco products intended completely or partially to replace tobacco in a smoking article. For this purpose, the wrapper of the article has added to it a mixture of at least one reducing sugar which is non-volatile at room temperature and of at least one nitrogen-containing compound which releases ammonia at the temperature of and throughout the burning of the product.
Patent PT-771347-E (PT)
Inventor: CHOWHAN MASOOD
IPC: C11D7/42
Filed: 1996-06-07
Abstract: A stable liquid enzyme composition comprises water, an enzyme in an amount effective to clean a contact lens and stabilising agents selected from a borate or boric acid compound and 50-70% v/v of one or more 2-3 carbon polyols. A method of cleaning and disinfecting a contact lens using the liquid enzyme composition comprises dispersing it in an aqueous disinfecting solution containing an antimicrobial agent to form an aqueous disinfectant/enzyme solution, contacting the lens either with the disinfecting solution prior to dispersing of the cleaning composition therein, or with the aqueous disinfectant/enzyme solution, and soaking the lens in the aqueous disinfectant/enzyme solution for a period of time sufficient to clean and disinfect the lens.
Patent PT-880618-E (PT)
Inventor: DEPASQUALE DAVID
IPC: D21H17/68
Filed: 1997-02-12
Abstract: Filled paper is made by adding a cationising amount of cationic polymer to a slurry of precipitated calcium carbonate, mixing this slurry into a cellulosic suspension and forming a thin stock, adding anionic particulate material to the suspension before or after the slurry, mixing a polymeric retention aid into the thin stock which includes the precipitated calcium carbonate and the anionic particulate material, draining the thin stock on a screen to form a sheet and drying the sheet. A suitable slurry for this purpose is a slurry of 5 to 70% by weight precipitated calcium carbonate and cationic polymer selected from 0.1 to 1% cationic starch and 0.01 to 0.3% of a high charge density, relatively low molecular weight, cationic polymer.
Patent PT-949953-E (PT)
Inventor: FICSOR ISTVAN
IPC: F16M7/00
Filed: 1997-09-05
Abstract: A base is disclosed for a filter container and a pump for displacing liquids that flow through the filter container. In order to provide a common base for the filter container and a pump which requires as little standing space as possible and which allows the relative orientation of the pump or pump connections to be flexibly adapted, the base is composed of several parts and consists of a first filter base adapted to the bottom of the filter container and of a second base arm which extends horizontally from the filter base in the radial direction and has a surface for receiving the pump. The filter base has several cavities around its circumference which constitute parts of a detachable connection system and which receive matching fastening means arranged at the end of the base arm for fastening the arm to the filter base.
Patent PT-890631-E (PT)
Inventor: DILWORTH BRID
IPC: C10L1/22
Filed: 1996-02-02
Abstract: An additive composition comprising:(a) an ashless dispersant comprising an acylated nitrogen compound; and(b) a carboxylic acid, or an ester of the carboxylic acid and an alcohol wherein the acid has from 2 to 50 carbon atoms and the alcohol has one or more carbon atoms provides an improvement in the lubricity of fuel oils and exhibits improved solubility in the fuel oil.
Patent PT-869233-E (PT)
Inventor: XAMMAR PEDRO
IPC: E04G11/52
Filed: 1998-04-01
Abstract: The joist for formwork (1) is characterized in that its cross section comprises a part of more thickness and a part of smaller thickness, forming a T-shaped profile. It also comprises means (A, B) for its coupling to the joists (1) adjacent to it in longitudinal direction, constituted by a first coupling element (A), provided at one end of the joist and provided with a hole (14), and a second coupling element (B), provided at the other end of the joist and provided with a pin. A joist is provided that facilitates the disassembly, since it only has a small part of its vertical wall in contact with the panel in the moment of the disassembly. <IMAGE>
Patent PT-1032817-E (PT)
Inventor: MELET FRANCOIS
IPC: G01N33/48
Filed: 1998-11-16
Abstract: A compact apparatus for automatically analyzing a blood sample having a pumping assembly, a dilution assembly and a measuring assembly. The pumping assembly includes pumps for air, lysis and diluent. The dilution assembly includes a sampling needle, and containers for waste, white corpuscle dilution, and red corpuscle dilution. The measuring assembly includes a measuring chamber, and a device for counting platelets, red corpuscles, white corpuscles and hemoglobin in the blood sample. Both red and white corpuscles are counted in the same measuring chamber. A plurality of pipes establish fluid communication between the elements of the apparatus. A plurality of electro-valves are adapted to automatically open and close the pipes thereby regulating fluid flow between the pumping assembly, the dilution assembly and the measuring assembly. One of the electro-valves is adapted to shutoff a diluent source and substitute water therefor, whereby the apparatus is rinsed with the water to avoid crystalization.