baber/WOPTO huggingface dataset:
Patent MX-PA04008459-A (MX)
Title: Method and apparatus for estimating power required for transmission of data at a rate in a communication system.
Inventor: RASHID A ATTAR
IPC: H04J13/00
Filed: 2003-03-04
Abstract: Methods and apparatus for estimating maximum rate of data and for estimating a transmission power required for transmission of a data with a rate of data in a communication system are disclosed. A terminal determines a quality metric of a communication link, over which data are to be transmitted, and modifies the determined quality metric by a quality metric margin. The terminal then estimates the maximum rate of data in accordance with the modified quality metric. Alternatively, the terminal then estimates transmission power required for transmission of a data with a rate of data in accordance with the rate of data and the modified quality metric. The quality metric margin may be pre-determined or dynamically adjusted. The terminal dynamically adjusts the quality metric margin in accordance with a result of comparison of a transmit power corresponding to the estimated maximum rate of data with an actual transmit power used to transmit the data.
Patent MX-PA04009074-A (MX)
Title: Stable anterior chamber phakic lens.
Inventor: STEPHEN J VAN NOY
IPC: A61L27/00
Filed: 2003-04-01
Abstract: An anterior chamber phakic lens (10) having two opposing pairs of footplates (12) joined to optic (14) by haptics (16) and ramp (18). The lens (10) is made from a foldable, highly compatible material that has a very low haptic compression force and low axial displacement, yet is stable in the anterior chamber.
Patent MX-PA04009476-A (MX)
Title: (4,2-disubstituted-thiazol-5-yl)amine compounds as pde7 inhibitors.
Inventor: DUCROT PIERRE
IPC: C07D277/40
Filed: 2003-03-06
Abstract: A compound selected from those of formula (I), wherein R1a, R1b, R2, R3 are as defined in the description, and optionally, its optical isomers, N-oxide, and addition salts thereof with a pharmaceutically-acceptable acid or base, and medicinal products containing the same are useful as specific inhibitors of phosphosdiesterase-7 (PDE-7).
Patent MX-PA04010353-A (MX)
Title: Modified vaccinia virus ankara for the vaccination of neonates.
Inventor: HANS PETER HEFTI
IPC: A61K39/00
Filed: 2003-04-16
Abstract: The invention concern the use of a virus for the preparation of a medicament for the vaccination or treatment of a neonatal or prenatal animal, including a human, wherein the virus is capable of infecting the cells of the neonatal or prenatal animal, including a human, but not capable of being replicated to infectious progeny virus in the neonatal or prenatal animal, including a human. The virus is preferably a Modified Vaccinia Virus Ankara. In particular, the invention concerns the vaccination of neonates against infections with viruses belonging the same virus group than the virus used for vaccination. Moreover, the invention concerns the vaccination of neonates against antigens selected from foreign antigens and tumour antigens, wherein the tumour antigen and/or the foreign antigen are different from the antigens associated with the virus. The invention further concerns the use of viruses as defined above to increase the level of factors which activate dendritic cells or their precursor cells and/or to increase the number of dendritic cells or their precursor cells and/or to increase the production and/or cellular content of an interferon (IFN) or IL-12.
Patent MX-PA04012951-A (MX)
Title: Sewing machine comprising a damping device.
Inventor: KURT KLUNDT
IPC: D05B27/02
Filed: 2003-07-10
Abstract: The invention relates to a sewing machine which comprises a stationary sleeve (41) enclosing an oscillating shaft (38) in order to dampen the torsional oscillations of the latter. Between the shaft (38) and the sleeve (41) a gap (43) is configured. Said gap (43) is filled with a viscous substance (24) and is closed by sealing elements (44). When the shaft (38) is moved relative the sleeve (41) a viscous friction occurs in the viscous substance and brings about a damping effect.
Patent MX-PA05000462-A (MX)
Title: Dual lift system.
Inventor: CASH JAMES T
IPC: F27D17/00
Filed: 2003-06-24
Abstract: Valve (50) and valve lift system (52) suitable for use in a regenerative thermal oxidizer (10), and oxidizer including the switching valve. The valve of the present invention exhibits excellent sealing characteristics and minimizes wear. In a preferred embodiment, the valve is sealed with pressurized air during its stationary modes, and unsealed during movement to reduce valve wear.
Patent MX-PA05000985-A (MX)
Title: Oriented composite thermoplastic material with reactive filler.
Inventor: NEWSON WILLIAM R
IPC: C04B16/06
Filed: 2003-07-18
Abstract: A composite material is provided which includes a highly oriented polymer produced by a drawing process and a particulate filler capable of reacting with a fluid to form a cementitious bond. The amount and degree of dispersion of the filler is selected to form interpenetrating polymer and cementitious networks upon reaction of the filler with the fluid.
Patent MX-PA05005496-A (MX)
Title: User interface using text compression.
Inventor: GWAN SWEE LEE
IPC: G06F40/00
Filed: 2005-05-24
Abstract: The present invention relates to a user interface with the capability of displaying multiple languages, and to a device using such user interface. It is therefore desirable to have a device having a user interface capable of supporting multiple languages with a reduced amount of memory space for storing the user interface text strings. According to the invention, a device where data for a selected language are present in non-compressed form while data for non-selected languages are present in compressed form is proposed.
Patent MX-PA05005928-A (MX)
Title: Benzimidazole-pyridone-based azo dyes.
Inventor: MAX HUGIN
IPC: C09B29/42
Filed: 2003-11-26
Abstract: The present invention relates to azo dyes of formula (1) which are soluble in organic solvents, wherein R1 is -CN, -COOR5, -CONR6R7 or a heterocyclic ring, R2 is unsubstituted or substituted alkyl, unsubstituted or substituted aryl, -CF3, -COOR5, -CONR6R7 or -COR5, R3 is hydrogen, -SO3M, alkyl, alkoxy, alkylcarbonyl, -NO2 or halogen, R4 is substituted aryl, substituted heteroaryl or an aryl-N=N-aryl radical, wherein one or both of the aryl radicals in aryl-N=N-aryl is/are unsubstituted or substituted, or a radical heteroaryl-N=N-heteroaryl, wherein one or both of the heteroaryl radicals in heteroaryl-N=N-heteroaryl is/are unsubstituted or substituted, R5 is hydrogen, alkyl or unsubstituted or substituted aryl, R6 is hydrogen, alkyl or unsubstituted or substituted aryl, R7 is hydrogen, alkyl or unsubstituted or substituted aryl, M+ is a cation, n is a number 1, 2 or 3 and m is a number 1, 2 or 3, to a process for the preparation thereof and to the use thereof in the production of coloured plastics or polymeric colour particles, and as printing inks, printing dyes, coating compositions and wood stains.
Patent MX-PA05008263-A (MX)
Title: Uplink transmission power control method.
Inventor: SEUNG HOON HWANG
IPC: H04M1/00
Filed: 2004-02-04
Abstract: Disclosed is an uplink transmission power control method, by which a transmission power of an uplink signal is efficiently controlled while a terminal communicates with a plurality of base stations. The present invention includes the steps of computing command values for a plurality of base stations in a terminal in soft handover with a plurality of the base stations transmitting power control commands to the terminal and lowering uplink transmission power if the command values computed for a plurality of the base stations includes at least one power-down command. And, the present invention includes the steps of receiving a power control command transmitted from at least one base station, computing at least one command value according to the received power control command, and lowering uplink transmission power if the command value includes a transmission power-down command value.
Patent MX-PA05009301-A (MX)
Title: Aerosol antiperspirant with polyamide.
Inventor: AIXING FAN
IPC: A61K8/37
Filed: 2004-03-02
Abstract: (a) a solvent system for the gellant in an amount of up to 36% of the total formula; (b) from 0.1 - 1.5% by weight based on the total weight of the composition of at least one siliconized polyamide as a gellant; (c) an antiperspirant active used in an amount to have a deodorant and/or antiperspirant effect; and (d) a propellant gas.
Patent MX-PA05010382-A (MX)
Title: Four branch differential transmission systems.
Inventor: FRANK MOELLER
IPC: F16H48/05
Filed: 2004-03-23
Abstract: A four branch differential transmission system comprises a first shaft (10) and a second shaft (12), which constitute the input and output shafts, a third shaft (42) connected to a first variator (44, 46) arranged to increase or decrease its speed and a fourth shaft (48) connected to a second variator (50, 52) arranged to increase or decrease its speed. The four shafts are connected together by a spur gear compound epicyclic gearset including a plurality of toothed gearwheels. The compound gearset comprises first and second epicyclic gearsets, the first epicyclic gearset being of positive type and comprising a first sun wheel (40) and a second sun wheel (28) in mesh with a respective set of first and second planet wheels (21; 26). Each first planet wheel (21) is connected to rotate with a respective second planet wheel (26) about a respective common planet shaft (24). The planet shafts (24) are connected to a common planet carrier (22). The second epicyclic gearset is of negative type and comprises the first sun wheel (4) and a third sun wheel (38), the third sun wheel being in mesh with a set of third planet wheels (39), each of which is connected to rotate with a respective first and second planet wheel about a respective planet shaft (24). The first and third planet wheels (21; 39) of each connected set of planet wheels are of different diameter and are connected together to constitute a stepped composite planet wheel.
Patent MX-PA05011538-A (MX)
Title: Thickenable compositions.
Inventor: JOLLIFFE IAN GORDON
IPC: A23L29/256
Filed: 2004-04-02
Abstract: A composition comprises water, a first anionic polymer and a second anionic polymer. The first anionic polymer may be xanthan. The second anionic polymer may be selected from an alginate, a carboxymethyl cellulose, an acrylate polymer, a carrageenan and a pectin. The composition is such that diluting it with water increases its viscosity.
Patent MX-PA05012672-A (MX)
Title: Container.
Inventor: GUARINI TIZIANA
IPC: B65D1/00
Filed: 2005-11-23
Abstract: A blank for assembly into a container, the blank comprising a base panel, a first wall panel and a second wall panel; the first wall panel having a corner flap having a body portion and end portion, the end portion having a smaller width than the body portion, the body portion being separated from the end portion by a shoulder; the second wall panel having a notch in a side edge adjacent the base panel, whereby the first wall panel may be folded substantially perpendicularly to the base panel and the corner flap may be folded over such that the shoulder is retained in the notch to hold the corner flap in place. Preferably, the shoulder is adapted to exert a force on an edge of the notch distal from the base panel. A container formed from a blank is also disclosed. A process for assembling a container is disclosed comprising the steps of providing a blank; folding the corner flap over to retain the shoulder in the notch; and folding the second wall panel over the corner flap.
Patent MX-PA06000485-A (MX)
Title: Improved garlic synthetic oil and methods for obtaining the same.
Inventor: CANELA JUAN MANUEL CARRANCO
IPC: C11B1/10
Filed: 2006-01-12
Abstract: The present invention describes improved garlic synthetic oil compositions having characteristics similar to those of natural oil, which contain the main components of garlic natural oils or extracts at similar ratios, thus providing garlic organoleptic properties to materials where it is applied. The ratios of elements forming the inventive composition may be adjusted as required, so that compositions having variable ratios in the elements thereof are obtained, the composition simultaneously complying with international quality parameters established for this type of products. The described compositions are uniform with regard to the ratio and presence of the elements thereof, thus not having quality variation, availability and cost problems, which are factors generally associated with garlic natural oils. Said compositions may also be used as odour and flavour agents for generating products where a garlic natural aroma is required. High-performance and low-cost synthesis methods are also described for obtaining the aforementioned compositions.
Patent MX-PA06003990-A (MX)
Title: Tubular roller for conveyor belts.
Inventor: CORONEL HILARIO VEGA
IPC: B65G15/16
Filed: 2006-04-07
Abstract: The present invention refers to a high impact tubular roller for conveyor belts of the type employed for conveying heavy bulk products or materials such as sand, gravel, coal, aggregate materials and the like. The invention is characterized in that it comprises a central coupling coupled to two assembling rings, which include a peripheral recess located in both the rear and front surfaces thereof useful for generating an annular rib as a dovetail-like coupling means with the central coupling by one of the surfaces thereof, the opposite surface being coupled to an end cylindrical-shaped body by a tongued and grooved system, the cylindrical-shaped body being adapted to house and innerly fasten a roller, and to receive an end cap located at the outer surface thereof. The central coupling, the assembling rings, the end cylindrical-shaped bodies and the roller cap centrally comprise a hollow adapted to receive a longitudinal axis, which is inserted with the end portions thereof protruding from each hollow side, said axis including a periphery groove, which protrudes from the cap of each roller cylindrical-shaped body, where a safe system is inserted to maintain the elements of the tubular roller attached together, the axis further comprising two opposite recesses that generate supporting means located at the roller support base.
Patent MX-PA06006402-A (MX)
Title: Reversible vial closure.
Inventor: FRICKE MARK R
IPC: B65D50/04
Filed: 2006-06-05
Abstract: A cap is for a container having both a child-resistant and a non-child-resistant closing position. In the child-resistant position, tabs or latches projecting from the container are wedged between a resilient lip and tabs or latches projecting from an inner surface of the cap. In the non-child-resistant position, the tabs or latches projecting from the inner surface of the cap are wedged between a holding unit, such as a bowl-shaped cap cover, and tabs or latches projecting from the inner surface of the cap.
Patent MX-PA06010372-A (MX)
Title: Constant current class 3 lighting system.
Inventor: RIMMER PHILIP JOHN
IPC: H05B39/02
Filed: 2005-03-14
Abstract: A lighting system having a power supply and at least one luminaire. The power supply includes a power supply input to receive a first signal having a first frequency and a circuit for converting the first signal to a second signal. The power supply also includes at least one power supply output to output a second signal having a substantially constant current and a second frequency distinctly higher than the first frequency. The luminaire includes a lamp coupled to a lamp driver circuit, which has an input for receiving the output signal from the power supply and which is configured to use the received output signal to operate the lamp. The lamp driver input and the power supply output may be connected by a flexible cable.
Patent MX-PA06013261-A (MX)
Title: Method for producing flexographic printing plates using direct laser engraving.
Inventor: STEBANI UWE
IPC: B41N3/00
Filed: 2005-05-18
Abstract: The invention relates to a method for producing flexographic printing plates using direct laser engraving. According to said method, a print relief is engraved in the relief-forming layer with the aid of a laser and the printing plate that has been produced is subsequently cleaned with a liquid detergent.
Patent MX-PA06015136-A (MX)
Title: Conformable pod for a manual implement.
Inventor: WILLAT BOYD I
IPC: A47C20/02
Filed: 2005-06-21
Abstract: A conformable pod and related method of production are provided, wherein the pod defines a soft structure adapted for deformation in response to minimal pressure applied manually, i.e., by contact with some portion of the body, and for retaining a deformed configuration substantially in the absence of continued application of manual pressure. The pod includes a viscous and tacky gel material encased within a closed chamber defined at least in part by a relatively thin and easily deformed outer skin providing minimal deformation resistance. In a preferred form, the encased gel material is a coagulated or partially coagulated gel such as a silicone-based gel material adapted for deformation in response to minimal applied manual pressure, and for substantially pressureless retention of the as-deformed shape, followed by relatively slow return (at least two seconds or more) to an initial nondeformed shape upon manual release of the pod.
Patent MY-103795-A (MY)
Title: Paint shaker
Inventor: MICHAEL ROGER CANE MICHAEL HOWARD GROVES
IPC: C09D5/00
Filed: 1988-11-10
Abstract: A PAINT SHAKER (1) FOR USE IN IN-STORE PAINT TINTING OPERATIONS COMPRISING A PLAT FORM (2) AND CLAMPING MEMBER (4) FOR ACCOMMODATING A PAINT CONTAINER (3) WHICH IS TO BE SHAKEN WHEREIN THE SHAKER IS PROVIDED WITH MEANS FOR SENSING RESISTANCE TO DOWNWARDS MOVEMENT OF THE CLAMPING MEMBER (4a OR 34) AND CLAMPING MEMBER DETECTION MEANS (34) WHICH DO NOT ALLOW THE SHAKING OPERATION TO START UNTIL THE CONTAINER IS CLAMPED AND THE CLAMPING MEMBER IS IN A PRE-SELECTED POSITION CHOSEN BECAUSE IT IS A POSITION THAT THE CLAMPING MEMBER MUST OCCUPY IF IT IS TO CLAMP A CONTAINER PROPERLY EITHER DIRECTLY OR VIA A CAPSULE FROM WHICH COLOURANT HAS BEEN EXPELLED. @@(FIG. 1)
Patent MY-106192-A (MY)
Title: Improved titania catalysts, their preparation and use in fischer-tropsch synthesis.
Inventor: CHARLES HARRISON MAULDIN
IPC: B01J23/745
Filed: 1989-10-19
Abstract: A PROCESS FOR THE PREPARATION OF NOVEL BINDER-CONTAINING TITANIA SUPPORTS, AND CATALYST COMPOSITIONS OF IMPROVED POROSITY PREPARED FROM SUCH SUPPORT FROM SUCH SUPPORTS, USEFUL FOR FISCHER-TROPSCH SYNTHESIS. THE SUPPORTS ARE PREPARED BY INCORPORATING A SMALL AMOUNT OF AN INORGANIC METAL OXIDER BINDER, CONSTITUTED OF ALUMINA, ZIRCONIA OR SILICA, WITH TITANIA. THE CATALYSTS ARE PREPARED BY DISPERSING A CATALYTICALLY EFFECTIVE AMOUNT OF A METAL, OR METALS, PREFERABLY COBALT, OR COBALT PLUS AN ADDITIONAL METAL, OR METALS, CATALYTICALLY ACTIVE IN A FISCHER-TROPSCH REACTION ON THE TITANIA BINDER SUPPORT.
Patent MY-106858-A (MY)
Title: Resin sealing type semiconductor device in which a very small semiconductor chip is sealed in package with resin.
Inventor: HIROMICHI SAWAYA
IPC: H01L21/60
Filed: 1990-08-21
Abstract: A LEAD OF A LEAD FRAME CANNOT BE MADE CLOSE TO A VERY SMALL SEMICONDUCTOR CHIP IN VIEW OF PROCESSING DIMENSIONS. IF A TAB TECHNIQUE IS USED TO DIRECTLY CONNECT THE SEMICONDUCTOR CHIP AND THE LEAD IN ORDER TO IMPROVE IN RELIABILITY, A DEVICE FOR FORMING A BUMP ON AN ELECTRODE OF THE CHIP IS REQUIRED, WHICH INCREASES THE COST OF INVESTMENT IN EQUIPMENT. A PRINTED CIRCUIT BOARD (33) IS FORMED BETWEEN THE LEAD (34) AND BED (31) AND A BONDING WIRE (37) IS USED TO SHORTEN THE LENGTH OF WIRING AND THUS TO DECREASE IN COST AND IMPROVE IN RELIABILITY. SINCE AN ELECTRODE PAD (35) OF THE SEMI-CONDUCTORCHIP (32), THE PRINTED CIRCUIT BOARD (33), AND THE LEAD (34) ARE CONNECTED TO EACH OTHER USING THE TAB TECHNIQUE, THE PRODUCTIVITY OF SEMICONDUCTOR DEVICES IS INCREASED. USING THE TAB TECHNIQUE, NO BUMPS ARE FORMED ANYWHERE AND THE COST OF INVESTMENT IN EQUIPMENT IS NOT SO INCREASED.(FIG. 3)
Patent MY-107111-A (MY)
Title: Containers.
Inventor: CHRISTOPHER PAUL RAMSEY
IPC: B65D/
Filed: 1990-09-29
Abstract: A METAL CAN BODY 1 COMPRISES AN END WALL 2 AND A TUBULAR SIDE WALL.THE SIDE WALL HAS UPPER AND LOWER CYLINDRICAL PORTIONS 5, 7 JOINED BY A PLURALITY OF CONCAVE FLEXIBLE PANEL PORTIONS 6 AND RIBS 12.THE BENEFIT ARISING FROM THE FLEXIBLE PANELS IN THE SIDE WALL IS THE ABILITY TO ATTENUATE THE INTERNAL PRESSURE CHANGES ARISING DURING THERMAL PROCESSING OF LIDDED CANS BY PROVIDING A ELASTIC MECHANISM WHICH ENHANCES THE CHANGE IN INTERNAL CAN VOLUME. (FIG. 1)
Patent MY-111877-A (MY)
Title: Device for sorting game coin by paramagnetic properties
Inventor: HIROSHI ABE
IPC: G07D5/08
Filed: 1992-03-25
Abstract: A DEVICE FOR USE IN SORTING COINS COMPRISE A SECOND MAGNETIC MEANS (14) FOR DISTINGUISHING A COIN OF A SUBSTANTIALLY FERROMAGNETIC NATURE FROM SUBSTANTIALLY NON-MAGNETIC OR SUBSTANTIALLY PARAMAGNETIC COINS, WHEREBY THE FERROMAGNETIC COIN IS ATTRACTED TO THE SECOND MAGNETIC MEANS (14) FOR SEPARATION FROM COINS OF DIFFERENT MAGNETIC PROPERTIES, AND A FIRST MAGNETIC MEANS (13) FOR DISTINGUISHING A COIN OF A SUBSTANTIALLY PARAMAGNETIC NATURE FROM A SUBSTANTIALLY NON-MAGNETIC COIN, WHEREBY THE PARAMAGNETIC COIN IS ATTRACTED TO THEFIRST MAGNETIC MEANS (13) FOR SEPARATION FROM THE NON-MAGNETIC COIN, WHEREIN THE MAGNETIC FLUX DENSITY OF THE FIRST MAGNETIC MEANS (13) IS GREATER THAN THE MAGNETIC FLUX DENSITY OF THE SECOND MAGNETIC MEANS (14). THE INVENTION ALSO COMPRISE A COIN FOR USE WITH SAID DEVICE.(FIG. 1)
Patent MY-111182-A (MY)
Title: Lunchbox with reversible cover
Inventor: LEE E FETHER
IPC: A45C11/20
Filed: 1993-05-18
Abstract: A LUNCHBOX (10) INCLUDING A WEDGE-SHAPED TRAY (12) AND A SIMILARLY CONFIGURED WEDGE-SHAPED COVER (14) POSITIONABLE THEREOVER IN REVERSIBLE END-TO-END POSITIONS TO FORM DIFFERENT INTERNAL SPACE CONFIGURATIONS. LATCH ASSEMBLIES (32, 64) LOCKING THE COVER (14) TO THE TRAY (12) IN EACH POSITION. BOTH LATCH ASSEMBLIES (32, 64) BEING COMPLETELY DISENGAGEABLE. ALTERNATIVELY, ONE LATCH ASSEMBLY (32, 64) CAN REMAIN ENGAGED TO DEFINE A HINGE ASSEMBLY (36) FOR PIVOTAL MOVEMENT OF THE COVER (14).(FIG. 3)
Patent MY-111190-A (MY)
Title: Substituted thiazolidinedione derivatives
Inventor: ROBIN SHERWOOD ROMAN
IPC: C07D417/12
Filed: 1993-09-03
Abstract: A COMPOUND OF FORMULA (1): FORMULA 1 OR A TAUTOMERIC FROM THEREOF AND/OR A PHARMACEUTICALLY SOLVATE THEREOF, WHEREIN: R1 REPRESENTS A HYDROGEN ATOM, AN ALKYL GROUP, AN ARALKYL GROUP, WHEREIN THE ARYL MOIETY MAT BE SUBSTITUTED OR UNSUBSTITUTED, OR A SUBSTITUTED OR UNSUBSTITUTED ARYL GROUP; A1 REPRESENTS HYDROGEN OR 1 TO 4 OPTIONAL SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF: ALKYL, ALKOXY, ARYL AND HALOGEN OR A1 REPRESENTS TWO SUBSTITUENTS ON ADJACENT CARBON ATOMS, WHICH SUBSTITUENTS TOGETHER WITH THE CARBON ATOMS TO WHICH THEY ARE ATTACHED FORM A SUBSTITUED OR UNSUBSTITUTED ARYL GROUP; A2 REPRESENTS A BENZENE RING HAVING 1 TO 3 OPTIONAL SUBSTITUTENTS; AND M REPRESENTS A COUNTER-ION; A PROCESS FOR PREPARING SUCH A COMPOUND, A PHARMACEUTICAL COMPOSITION COMPRISING SUCH A COMPOUND AND THE USE OF SUCH A COMPOUND AND COMPOSITION IN MEDICINE .
Patent MY-109540-A (MY)
Title: Downhole pump of constant differential hydraulic pressure
Inventor: MR JAMES D FOX
IPC: F04B49/12
Filed: 1993-12-03
Abstract: A COMBINATION LOW-PRESSURE, HIGH-PRESSURE HYDRAULIC PUMP WHICH ALLOWS A CONSTANT DIFFERENTIAL PRESSURE IS DISCLOSED. THE PUMP FEATURES DUAL CONCENTRIC PISTONS (20, 25), EACH WITH ITS OWN CHAMBER (30, 35). THE PISTONS (20, 25) RECIPROCATE TOGETHER AT LOW PRESSURES; AS THE SYSTEM PRESSURE INCREASE, A SPRING (45) RESISTS THE STROKE OF THE LOW PRESSURE PISTON (20), SO THAT ULTIMATELY ONLY THE SMALLER, HIGH PRESSURE PISTON (25) RECIPROCATES.(FIG 2)