baber/WOPTO huggingface dataset:
Patent RU-2041400-C1 (RU)
Title: Non-displacement pump
Inventor: DUMOV VIKTOR I
IPC: F04D29/70
Filed: 1989-04-24
Granted: 1995-08-09
Abstract: FIELD: pump engineering. SUBSTANCE: bearing ring of the filter is mounted on the fitting collar of the sucking pipe line by way of a fastening member. The ring is coupled with radial ribs coated with a protecting net. A ring groove with through radial opening is made in each answered surface of the collar and bearing ring. The axes of the grooves are arranged in planes perpendicular to the axis of rotation of the working wheel to define a groove. The fastening member is constructed as radial bent of wire turn wound in the direction of wheel rotation and loop. The bent is arranged in radial opening of the collar, the loop being received in the radial opening of the ring. EFFECT: enhanced efficiency. 2 dwg
Patent RU-2108116-C1 (RU)
Inventor: POL KENNET REHND
IPC: A61M5/50
Filed: 1990-11-27
Granted: 1998-04-10
Abstract: Устройство для введения лекарства, в частности для самоинъекции, включает в себя корпус, в котором содержится контейнер 16 с вводимым препаратом, механизм подачи 47 и средства 46, управляемые механизмом подачи для введения упомянутого препарата. Корпус состоит из двух частей 40,41, причем первая часть имеет возможность перемещаться относительно второй, где первая часть 40 снабжена пусковым механизмом 66, и упомянутый механизм подачи 47 частично приводится в действие при срабатывании пускового механизма 66 указанной первой части и частично приводится в действие движения второй части 41 относительно вышеуказанной первой части 40, но целиком приводится в действие только в результате как срабатывания пускового механизма, так и движения второй части. Таким образом, исключается возможность случайного срабатывания средств подачи. 1 с. и 14 з.п. ф-лы, 24 ил.
Patent RU-2027630-C1 (RU)
Title: Bicycle pedal
Inventor: GALDIN ALEKSANDR V
IPC: B62M3/12
Filed: 1991-03-25
Granted: 1995-01-27
Abstract: FIELD: bicycle engineering. SUBSTANCE: pedal has cast body 1 with T-shaped projections 2 arranged on frame of body 1, rubber blocks 3 with longitudinal slots and holes located on body, box-shaped cover plates 4 with reflectors 5. EFFECT: enhanced quality. 3 cl, 3 dwg
Patent RU-2031514-C1 (RU)
Title: Gear for hydraulic protection of submersible oil-filled electric motor
Inventor: SHILMAN ALEKSANDR KH
IPC: H02K5/12
Filed: 1991-04-29
Granted: 1995-03-20
Abstract: FIELD: electrical engineering. SUBSTANCE: hydraulic protection includes compensator 4 anchored in lower part of electric motor 2 and protector 1 installed in its upper part. Supplementary flexible diaphragm 16 which inner space communicates with outer space of principal diaphragm 13 is positioned between center 10 and lower 11 butt seals. Outer space of supplementary diaphragm communicates with space 25 between upper 9 and center 10 butt seals to secured improved hydraulic protection. EFFECT: enhanced reliability of operation of submersible oil-filled electric motors. 2 dwg
Patent RU-2031081-C1 (RU)
Inventor: LINETSKIJ ANATOLIJ GERSHOVICH
IPC: B66F7/14
Filed: 1991-04-30
Granted: 1995-03-20
Abstract: FIELD: garage equipment; lifts. SUBSTANCE: lift has device to control travel of carriages with signalling arrangements indicating relatively safe positions of lift and vehicle under servicing. Lifting mechanisms screw rotation converters have impellers secured on screws and slot-type inductive converters also secured on screws. Signalling arrangements indicating safe positions of lift and vehicle are coupled, together with lifting mechanisms motion converters, with microprocessor program setting unit by means of functional coupling. Setting of synchronous lifting basing on correlation of motion of lifting mechanisms with position of vehicle relative to lift provides higher accuracy of synchronization in time, fixed electric coupling of lifting mechanisms motion converters with control and automation of operation. EFFECT: enhanced operation reliability. 8 dwg
Patent RU-2016222-C1 (RU)
Title: Turbo-driven pump assembly
Inventor: KHLOPENKOV PAVEL R
IPC: F03B13/04
Filed: 1991-05-08
Granted: 1994-07-15
Abstract: FIELD: mechanical engineering; pumps. SUBSTANCE: pump discharge branch and turbine outlet branch are arranged coaxially at both sides of housing with spiral inlet. Fitted on lower part of bushing in housing is turbine blade wheel, and on upper peripheral part, pump impeller. Central body arranged over bushing has pump outlet guide vanes rigidly secured in housing. Body is installed on rotating bushing in bearing to form unloading chamber between bushing and body. Disk rigidly secured on end of pump blades over periphery has additional rims of pump blades on central part. All rims form, respectively, radially and diagonally centripetal stages. Guide vanes are arranged between stages. Guide vane assembly is two-tier with flow divider which divides vanes into pump and turbine parts. EFFECT: enlarged operating capabilities. 3 cl, 1 dwg
Patent RU-2021006-C1 (RU)
Title: Rotary hydraulic impact powder dispenser
Inventor: TUMCHENOK VIKTOR I
IPC: B01F27/74
Filed: 1991-06-21
Granted: 1994-10-15
Abstract: FIELD: crushing equipment. SUBSTANCE: rotary hydraulic impact powder dispenser has body with product inlet and outlet branch pipes, concentrically installed rotor and stator forming circular channel communicating with channels made in the form of narrowing nozzles. Circular channel houses on the side of stator and rotor auxiliary perforated rings inside which there are circular flexible diaphragms and rings accommodating channels in the form of narrowing nozzles facing the inside of circular channel. Bases of product inlet and outlet branch pipes are positioned in circular channel. EFFECT: enhanced operating capabilities. 7 dwg
Patent RU-2012131-C1 (RU)
Title: Integrating a-d converter
Inventor: LUKYANOV LEV M
IPC: H03M1/52
Filed: 1991-06-21
Granted: 1994-04-30
Abstract: FIELD: pulse circuitry. SUBSTANCE: converter has integrator, null-detector, comparator, reference voltage source, adder, three keys, four counters, frequency divider, control unit, AND gates, OR gates, pulse generator, and multisection delay line. EFFECT: improved accuracy due to elimination of the errors. 2 cl, 3 dwg
Patent RU-2120838-C1 (RU)
Title: Plant for die casting
Inventor: ABDULLAEV VAGIF GAMID OGLY
IPC: B22D18/02
Filed: 1991-06-14
Granted: 1998-10-27
Abstract: FIELD: metallurgy, plants for die casting. SUBSTANCE: plant has two pistons on which half-molds are mounted. Pistons moving in opposite directions presss metal out of pouring chamber to hollow of injection mold, and forced together the half-molds through compression springs. EFFECT: higher efficiency. 3 dwg
Patent RU-2008840-C1 (RU)
Title: Device for sand blasting of tooth prostheses
Inventor: ZAKOV LEONID P
IPC: A61C3/025
Filed: 1991-07-23
Granted: 1994-03-15
Abstract: FIELD: medicine. SUBSTANCE: device has body 1, vessel 2 for abrasive material separated by partition 9 into two compartment 10 and 11, means 3 for supply of compressed air to jet 4, and device for supply of abrasive material from vessel 2 to jet 4. Device has protective plate 12 pivoted to partition 9 for angular displacement. Means 8 in form of two hoses 14 and 15 each of which communicates respective compartment with jet 4 and has pinching device 16 connected with protective plate 12. EFFECT: blasting of tooth prostheses with sand of different fractions and prevented mixing of fraction after blasting. 10 cl, 3 dwg
Patent RU-2001568-C1 (RU)
Inventor: KLEMYATO ROSTISLAV S
IPC: A01K57/00
Filed: 1991-06-03
Granted: 1993-10-30
Abstract: Использование: в сельскохоз йственном машиностроении , в частности в пчеловодстве в устройствах  приманочного приво  Сущность изобретени  привой содержит основание 1. в центре которого  установлен несущий элемент 2 с приманкой  11. Привой снабжен контейнером дл  приманки 8, в  котором установлены два конических фильтра 9. В одной из полостей контейнера 8 между стенкой и  сетчатым фильтром 9 размещена приманка 11  Стенка полости контейнера 8 между двум  сетчатыми  фильтрами 9 выполнена перфорированной В  средней части несущего элемента 2 выполнено  сквозное крестообразное отверстие, в котором расположен  держатель 4 с фиксатором 10 д  вертикальной  установки контейнера с приманкой Внешн   поверхность несущего элемента 2 в области  размещени  контейнера дл  приманки 8 охвачена  сетчатым экраном 5 2 ил
Patent RU-2094461-C1 (RU)
Inventor: ANDREAS KINER
IPC: C12P17/12
Filed: 1992-06-19
Granted: 1997-10-27
Abstract: Использование: биотехнология. Сущность изобретения: описан микробилогический способ получения 5-гидроксипиразинкарбоновой кислоты и/или ее солей из пиразинкарбоновой кислоты и ее солей в качестве субстрата с помощью микроорганизмов, выращенных с никотиновой кислотой и/или ее солями как единственным источником углерода. Используются бактерии Pseudomonas acidovorans, Achromobacter xylosoxydans. Процесс биотрансформации ведут при pH 4 - 10 и 10 - 60 o C. 5 з. п. ф-лы, 2 табл.
Patent RU-2018093-C1 (RU)
Title: Liquid level indicator
Inventor: EKSNER ADOLF P
IPC: G01F23/62
Filed: 1991-10-15
Granted: 1994-08-15
Abstract: FIELD: instrument engineering. SUBSTANCE: liquid level indicator has two-arm lever 7 disposed in a reservoir; compensator 12 with permanent magnet 10 and float 8 mounted on its arms, a ratio of buoyancy forces of float 8 and compensator varying as a function of a liquid level; switching-over unit isolated from a working medium by a diamagnetic wall. A portion of float 8 made in the form of a cylinder aligned with lever 7 is filled with liquid having a freezing temperature below a working medium temperature. EFFECT: enhanced accuracy, widened application range. 1 dwg
Patent RU-2028802-C1 (RU)
Title: Composition for treatment of sheep with estrosis
Inventor: FROLOV BORIS A
IPC: A01N25/04
Filed: 1991-12-13
Granted: 1995-02-20
Abstract: FIELD: veterinary. SUBSTANCE: composition has the following components, wt.-%: cypermethrin 5-20; ethanol 7-9; terpin hydrate 0.4-0.6, and accessory additions - the rest. Accessory additions: surface-active substance ОП-7 or ОП-10, neonol, emulsogen and solvent - nefras or solvent, or their mixture taken at the ratio 1:1:1.4. EFFECT: increased effectiveness of treatment. 6 tbl
Patent RU-2071820-C1 (RU)
Title: Filter
IPC: B01D63/14
Filed: 1991-12-10
Granted: 1997-01-20
Abstract: FIELD: cleaning of liquids; separation process by means of selective diaphragms. SUBSTANCE: filter has filter element which consists of diaphragm filtering material enclosed between perforated outer and inner tubes and seals laid over ends of cover and filter holder which are connected by means of threaded joint. Connecting thread of filter element is made on its inner tube. EFFECT: enhanced efficiency. 2 dwg
Patent RU-2030109-C1 (RU)
Title: Switching-over device
Inventor: ZAVODIN VITALIJ ALEKSEEVICH
IPC: H03K17/00
Filed: 1992-01-08
Granted: 1995-02-27
Abstract: FIELD: automobile electronics. SUBSTANCE: switching-over device has first 1 and second 2 supply wires, turn switch 3, lamps 4 of turn indicator, pulse generator 5, electronic switch 13, pulse-width modulator 27, unit 34 of registration of moment of making of turn switch 3 of automobile, choke 21, resetting diode 22, reservoir capacitor 23, relay 24 of short-circuit current protection with make contact 25 and current limiting resistor 26. EFFECT: elimination of flashing effect when lamps are switched on. 3 cl, 2 dwg
Patent RU-2033612-C1 (RU)
Title: Method for estimation of functional activity of leucocytes of peripheric blood
Inventor: SHEVCHENKO TAMARA FEDOROVNA
IPC: G01N33/49
Filed: 1991-10-18
Granted: 1995-04-20
Abstract: FIELD: medicine. SUBSTANCE: length of leukocytic cloud in two series of capillaries is measured. Said capillaries filled by centrifuged heparinized blood are incubated in thermostat. One series is incubated in vertical position, other is incubated in centrifuge being switched on. Then density of plasma is measured. Leukocytic formula and estimating index are calculated according to formula given in specification. EFFECT: improves efficiency of the method. 2 dwg, 4 tbl
Patent RU-2054171-C1 (RU)
Inventor: KOLDAEV VLADIMIR M
IPC: G01N33/48
Filed: 1992-01-27
Granted: 1996-02-10
Abstract: FIELD: separation of materials. SUBSTANCE: method involves application electromagnetic radiation to embryos of sea urchins before and after incubation in sea water, which contains material to be analyzed. Then they are flushed in clear sea water. characteristics of their subsequent development serves as indication of projective features of analyzed material. EFFECT: increased functional capabilities. 4 dwg
Patent RU-2008045-C1 (RU)
Title: Method of fire-fighting and device for its accomplishment
Inventor: DUBRAVA OLEG L
IPC: A62C5/00
Filed: 1992-02-11
Granted: 1994-02-28
Abstract: FIELD: fire-fighting. SUBSTANCE: combustion products of the pyrotechnical mixture released in the form of an ultra- or high- dispersed condensed phase containing salts of alkali, alkali-earth metals or transition metals are supplied to the protected space. The method is accomplished with the aid of a device that has a casing accommodating a remotely ignited pyrotechnical cartridge. The device uses an air or liquid cooling system. Solutions of combustion inhibitors can be used as cooling liquid. EFFECT: facilitated procedure. 6 cl, 1 dwg
Patent RU-2064256-C1 (RU)
Title: Method for forming technological groups of sheep during lambing
Inventor: YUSUPOV SHAMIL YA
IPC: A01K67/02
Filed: 1992-03-03
Granted: 1996-07-27
Abstract: FIELD: zootechny. SUBSTANCE: method involves forming sakman of 24 ewes in 3-4 days; forming sakman of 124-148 ewes during next 11-13 days; transferring sheep for pen-and-stall keeping, with lambed ewes being transferred to pens without keeping them in individual claiming pen. EFFECT: increased efficiency in maintaining lamb safety and simplified method effectuated in reduced time. 2 cl, 1 tbl
Patent RU-2018401-C1 (RU)
Title: Die for the volume deformation and the forged piece edging
Inventor: KADOCHNIKOV ALEKSANDR I
IPC: B21J13/02
Filed: 1992-03-24
Granted: 1994-08-30
Abstract: FIELD: mechanical engineering. SUBSTANCE: die for the volume deformation and the forged piece edging has an upper plate with a punch, a lower plate with a pusher, a compound matrix, a traverse hard-mounted with the trimming matrix for axial displacement. The trimming matrix is made as ring with cutting edge forming in conjunction with the punch centering protrusion a molding impression with a seam groove. The inner section of the molding matrix interacts with the cutting edge of the trimming matrix with the aid of reciprocal motion drive made in the form of spring-loaded stepped screws and a pusher. EFFECT: facilitated manufacture. 1 dwg
Patent RU-2045355-C1 (RU)
Title: Chamber mixer for centrifugal dusting of heavy aerosol wave mixtures
Inventor: CHIKOV VLADIMIR M
IPC: B01F11/02
Filed: 1992-04-03
Granted: 1995-10-10
Abstract: FIELD: civil engineering. SUBSTANCE: chamber mixer is designed for intensive energy saving wave technologies of crushing, mixing and transportation of substances. It presents air-operated hydraulic wave system which elements of oscillatory circuit are tuned to resonance through pipe-line of compressed air with power plant exciting waves. It has geometrical dimensions related by law of wave ratio to length of shock wave and geometrical shapes determined by wave physics. By contrast to pneumatic machines where compressed air acts on surface of working object over small area (ejector, slot and other types) wave vibration acts on whole volume of wave environment creating conditions for high productivity of system, for deep mixing and fine dispersion of mixtures and for their high chemical activity. Chamber mixer is mechanically coupled to turbine rotating by means of reactive component of flow of aerosols. EFFECT: high productivity, deep mixing and fine dispersion of mixtures. 2 dwg
Patent RU-2027982-C1 (RU)
Title: Test bed for running-in of internal-combustion engines
Inventor: TIMOKHIN SERGEJ V
IPC: G01M15/04
Filed: 1992-04-07
Granted: 1995-01-27
Abstract: FIELD: test equipment. SUBSTANCE: test bed has electric motor 1, clutch 2, transmission 3 which output is coupled to crank shaft of engine 4, to inputs of rotational speed pickup 5, of controller 6 of rotational speed of engine shaft and of high-pressure fuel pump 7. Output of controller 6 of rotational speed is connected to output of first actuator 8 and to second input of high-pressure fuel pump 7 which output is linked to system of fuel feed into cylinders of engine 4, to which exhaust system mechanism 9 of increase of indicator load is connected. The latter is coupled to controller 11 of pull-in stroke of working element via second actuator 10. Apart from this first input of first actuator 8 is coupled to controller 12 of sweep stroke of working element of first actuator. Its second input connected to second input of second actuator 10 is coupled via switch 13 to output of commutator 14 which second input is linked to bus 15 of power supply of actuators and which first input is connected to output of unit 16 of control over commutator. First input of the latter is connected to common power supply bus 19 via anode-cathode junction of thyristor 17 and collector-emitter junction of transistor 18. In this case second input is linked to positive power supply bus 20. Output of rotational speed pickup 5 is connected to input of rotational speed meter 21 which output is linked to angular acceleration meter 22 and to first inputs of first 23 and second 24 comparators. Their second inputs are connected to adjustment unit 25 and their outputs are coupled to controlling electrode of thyristor 17 and base of transistor 18 correspondingly. In additional to it power supply bus 26 of electric motor is connected to input of electric motor via wattmeter 27. EFFECT: enhanced running-in capabilities. 3 cl, 3 dwg
Patent RU-2067359-C1 (RU)
Title: Electrode assembly of electric-arc plasmatron
Inventor: KISLYAKOV VLADIMIR V
IPC: H05B7/18
Filed: 1992-04-22
Granted: 1996-09-27
Abstract: FIELD: plasmatrons. SUBSTANCE: electrode assembly has coaxially arranged central rod-type electrode and circular electrode branched off on working side into two identical parallel assemblies spaced apart at distance of steady ignition. EFFECT: simplified design and reliable operation of plasmatron in case of plate fusion. 2 dwg
Patent RU-2050004-C1 (RU)
Inventor: KASHULINA ALBINA P
IPC: G01N33/68
Filed: 1992-03-16
Granted: 1995-12-10
Abstract: Использование: медицина, может быть использовано в лабораторных исследованиях и мембраннологии. Сущность изобретения: у пациента берут пробу крови, получают гемолизат, измеряют общую активность каталазы гемолизата, затем гемолизат центрифугируют с последующим определением активности каталазы супернатанта и расчетном уровня мембраносвязанной каталазы путем вычисления разности первого и второго показателей и выражения этой разности в процентах от общей активности каталазы.
Patent RU-2024901-C1 (RU)
Inventor: ROMANOVA OLGA S
IPC: G03C1/04
Filed: 1992-06-02
Granted: 1994-12-15
Abstract: Использование: в химико-фотографической промышленности. Сущность изобретения: галогеносеребряный фотоматериал с регулируемым уровнем лоска поверхности и хорошей плоскостью получают без использования матирующих добавок путем введения в эмульсионный и защитный желатиновый слой заменителя желатина, представляющего собой водную дисперсию сополимера винилацетата с дибутилмалеинатом, содержащую N-поливинилпирролидон мол.м. 8 - 120 тыс.у.е., при этом количество заменителя желатина в пересчете на сухое вещество составляет в эмульсионном слое 20 - 50 мас.%, а в защитном желатиновом слое - 5 - 30 мас.% по отношению к массе сухого желатина. 2 табл.
Patent RU-2108099-C1 (RU)
Title: Saliva-soluble preparation for giving up tobacco smoking
Inventor: DAM ANDERS
IPC: A61K9/68
Filed: 1990-11-06
Granted: 1998-04-10
Abstract: FIELD: medicine; toxicology; narcology. SUBSTANCE: preparation comprises active principle, namely, nicotin or alkaloid dispersed in gel-like pharmaceutically acceptable water-binding agent. EFFECT: higher efficiency. 15 cl, 1 dwg, 2 tbl
Patent RU-2056423-C1 (RU)
Title: СПОСОБ ПОЛУЧЕНИЯ (-)- 1β -ЭТИЛ- 1α -(ГИДРОКСИМЕТИЛ)-1,2,3,4,6,7,12, 12В 1α -ОКТАГИДРОИНДОЛ(2,3-А)ХИНОЛИЗИНА (ВАРИАНТЫ), 1-ЭТИЛ-1(ГИДРОКСИМЕТИЛ)-1,2,3,4,6,7-ГЕКСАГИДРО-12Н-ИНДОЛ(2,3-А)ХИНОЛИЗИН И ЕГО ОПТИЧЕСКИ АКТИВНЫЕ СОЛИ
Inventor: YANOSH KRAJDL
IPC: C07D471/14
Filed: 1991-10-30
Granted: 1996-03-20
Abstract: Использование: в медицине, способы получения (-)-1β - этил- 1α -(гидроксиметил) - 1, 2, 3, 4, 5, 6, 7, 12, 12 b a -октагидроиндол (2,3-а) хинолизина путем взаимодействия 1 - этил 2, 3, 4, 6, 7, 12 - гексагидроиндол (2,3-а) хинолизина с эквивалентным количеством формальдегида с получением рацемата 1 - этил - 1 (гидроксиметил) - 1, 2, 3, 4, 6, 7 - гекса - 12Н - индол (2,3-а) хинолизина, с последующим добавлением более или менее эквивалентного количества оптически активной кислоты в среде растворителя при температуре окружающей среды с послучением диастереомерных солей, которые могут быть выделены и из которых восстановлением выделяют целевой продукт в виде основания. 7 с. и 2 з. п. ф-лы.
Patent RU-2065389-C1 (RU)
Inventor: OLAF STRANN
IPC: B65D33/01
Filed: 1992-10-02
Granted: 1996-08-20
Abstract: FIELD: transportation and storage of lose, preferably powder or granular materials. SUBSTANCE: container has insert with at least one hanger for securing the insert in outer container in correct position relative to container. hanger means form ventilation channels to evacuate air from insert in process of filling container with powder loose material and after filling up. Hangers can be made tubular to form ventilation channels. The latter can be adjusted by means of one-way valve. EFFECT: enlarged operating capabilities. 8 cl, 12 dwg
Patent RU-2035038-C1 (RU)
Title: Gas analyzer
Inventor: PAVLOV GENNADIJ V
IPC: G01N21/61
Filed: 1992-05-25
Granted: 1995-05-10
Abstract: FIELD: environment protection. SUBSTANCE: feedback circuit which connects amplifier output to terminal of RC circuit is introduced to accomplish the goal of invention. Output voltage from amplifier output which corresponds to concentration of gas is displayed by indication unit. Analog memory units are made from synchronization detectors and feedback circuit has resistor. EFFECT: increased functional capabilities. 2 cl, 2 dwg
Patent RU-2050078-C1 (RU)
Inventor: SLOBODYANIK IVAN P
IPC: A01B3/68
Filed: 1992-08-17
Granted: 1995-12-20
Abstract: FIELD: agricultural engineering. SUBSTANCE: cable traction set has truck with engine, for instance, self-propelled rice harvester, power units with winches located at opposite sides of truck and cable-and-sheave systems of winches coupled with truck. The latter has turning mast coupled with winch cable-and-sheave systems and truck drive pulley by means of traction cable. EFFECT: enlarged operating capabilities. 4 dwg
Patent RU-2057255-C1 (RU)
Title: Bolt
Inventor: IVANIJ MIKHAIL B
IPC: F16B35/04
Filed: 1992-08-19
Granted: 1996-03-27
Abstract: FIELD: mechanical engineering. SUBSTANCE: bolt has a rod with a head. The head is provided with an opening. A solid plug is fitted in the opening with interference. The angle at the top of the conical bottom of the opening is equal to 60-70°. The difference between angles at the conical bottom and conical part of the plug is in the limits of 0-0,025α, where a is the angle at the top of the conical bottom of the opening. EFFECT: enhanced reliability. 2 dwg
Patent RU-2056085-C1 (RU)
Title: Apparatus for crumbling soil before separation during root harvesting
Inventor: BORISOV FADEJ E
IPC: A01D33/04
Filed: 1992-09-28
Granted: 1996-03-20
Abstract: FIELD: agricultural engineering. SUBSTANCE: apparatus has tracing roller with central cylindrical part and conical sides. Lesser end of each side is positioned adjacent to central part. Diameter of lesser end of each side exceeds that of central part. EFFECT: increased efficiency and enhanced reliability in operation. 2 cl, 2 dwg