Abstract: The present invention makes it easy to lay-out a carriage traveling path crossing an aisle for a vehicle, etc.

Abstract: The present invention makes it easy to employ a floor surface aisle crossing a conveyance path in a conveyance system using a conveyance carriage 1 which travels on guide rails 7a and 7b laid on a floor surface 6 along the conveyance path, wherein at an aisle crossing section 14 in the conveyance path that the aisle on the floor surface crosses, a pit 15 is provided by digging down into the floor surface 6, and inside this pit 15, elevating guide rails 16a and 16b movable vertically parallel between a raised level at which the elevating guide rails connect the guide rails 7a and 7b before and after the pit 15 and a lowered level at which the upper surfaces of the elevating guide rails become flush with the floor surface 6 are disposed, and over the pit 15, a floor member 18 is laid so as to be flush with or substantially flush with the floor surface 8 while leaving elevating apertures for the elevating guide rails 16a and 16b.

Abstract: Disclosed is an aerodynamic pseudocontainer for a train. The pseudocontainer is configured to be stacked atop an intermodal container in a lead container car at a lead end of the train, so that its aerodynamic configuration reduces drag when the train is in motion, thereby reducing fuel costs and emissions. The pseudocontainer may have connectors on its bottom so that when it is placed on top of the intermodal container, locking devices may be used for attachment.

Abstract: A railroad car may comprise a frame comprising a first side and a second side laterally opposing each other. The railroad car may further comprise a first elastomeric mat and a second elastomeric mat supported by a plurality of reinforcement cables, the first and second elastomeric mats forming a load-carrying receptacle. Each elastomeric mat may have an outer edge and an inner edge, the inner edge of the first elastomeric mat abutting the inner edge of the second elastomeric mat when the load-carrying receptacle is in a closed configuration. The railroad car may further comprise a first pulley connected to the first side of the frame and a second pulley connected to the second side of the frame, the first pulley and second pulley each having a respective axis of rotation parallel to a direction of travel of the railroad car.

Abstract: A crash module for a rail vehicle is provided. The crash module includes a crash element, a frontal impact plate and a rear connecting plate, wherein a guide element is provided between the frontal impact plate and the rear connecting plate. The guide element has the form of a plate and is oriented essentially in a longitudinal direction of the rail vehicle.

Abstract: An improved pigment spacing composition and method of manufacture. A coating composition wherein the pigment particles are spaced more uniformly resulting in improved coating properties. In another embodiment, the present invention relates to a composition having nanoparticles interacting with pigmentary titanium dioxide to provide for more uniform spacing of the titanium dioxide.

Abstract: The present invention relates to pigments comprising (A) a platelet-shaped substrate (S), (B) a coating comprising two different metal oxides having a difference in refractive index of at least 0.1, wherein the metal oxide having a higher refractive indexis the metal oxide MOH and the metal oxide having a lower refractive index is the metal oxide MOL, wherein the amount of MOH and the amount of MOL changes (continuously), (C) a coating comprising metal oxides MOH and MOL, wherein the amount of MOH and the amount of MOL changes (continuously), and (D) optionally an outer protecting layer; a process for their production and their use in paints, ink-jet printing, for dyeing textiles, for pigmenting coatings (paints), printing inks, plastics, cosmetics, glazes for ceramics and glass. The pigments can show enhanced colour chroma while maintaining the lightness of coventional interference pigments, or vice versa.

Abstract: The invention provides modified sulphur comprising sulphur and a polysulphide-containing organosilane in an amount of in the range of from 0.3 to 25 wt % based on the weight of sulphur, in which modified sulphur the combined amount of sulphur and polysulphide-containing organosilane make up in the range of from 90 to 100 wt % of the obtained modified sulphur and wherein the polysulphide-containing organosilane is of the general molecular formula (1): (X3Si)mH(2n+1?m)Cn-Sa-Cn?H(2n?+1?m?)(SiX?3)m?; wherein a is an integer in the range of from 2 to 8, X and X? each are, independently, a hydrolysable group, n and n? each are, independently, an integer in the range of from 1 to 4, and m and m? each are, independently, an integer in the range of from 1 to (2n+1). The invention further provides a process for preparing such modified sulphur, a sulphur cement product comprising the modified sulphur and a process for preparing such.

Abstract: The present invention provides enhanced pallets. The pallets may be aluminum extruded pallets having a plurality of hollow blocks and a plurality of hollow cross members. The blocks and cross members are welded together to form a pallet. The blocks and cross members may have internal wall structures which, form one or more crush cells or crush zones. The crush cells or crush zones deform in a controlled manner on impact to reduce impact damage to the pallets. The pallets have a high load strength supporting capability and allow the pallets to withstand repeated or severe impacts while remaining functional.

Abstract: A table in accordance with the present disclosure includes a table top and first and second leg units. Each leg unit is mounted for movement relative to the table top from a closed position alongside the table top to an opened position extending away from the table top.

Abstract: Receipting and dispensing module (32-1) for equipments of automatic deposit and withdrawal of banknotes including a banknote seat (234) for storing banknotes (32) with arrangement in superimposition and subdivision in two banknote stacks (238f and 238r) and a couple of insertion and extraction devices (241f and 241r) for the insertion and the extraction of the banknotes. The banknote seat (234) is usable by each banknote stack and the insertion and extraction devices are arranged at the ends of the banknote seat. The module (32-i) comprises an input-output passage (82) and a diverting member (246) controllable for causing the banknotes to transit between the input-output passage (82) and one or the other insertion and extraction device. Guiding and moving elements (247) are provided for guiding and moving the banknotes between the diverting member (246) and one (241r) of the insertion and extraction devices (241f and 241r).

Abstract: A method of reinforcing a structural member comprises positioning a shell around the structural member, placing a force dampening material around an exterior of the shell and securing the force dampening material around the shell. In certain arrangements, the method further includes at least partially filling a space defined between the structural member and the shell with a filler material. In some embodiments, the filler material comprises a concrete, a grout, an epoxy, combinations thereof and/or the like. In one embodiment, the shell comprises a fiber reinforced polymer (e.g., CFRP, GFRP, aramid fibers, epoxy, other resins, etc.). In alternative embodiments, the methods additionally includes placing one or more layers of fiber reinforced polymer around the shell prior to placing a force dampening material around an exterior of the shell. In some embodiments, the layer of fiber reinforced polymer comprises CFRP, GFRP or any other type of fiber reinforced polymer.

Abstract: A cap-frame setting frame to which a cap frame holding a cap with a part on which embroidery is sewn by an embroidery sewing machine is detachably attached. The cap-frame setting frame includes a base frame having a distal end and a proximal end and including a fixing mechanism which is located at the proximal end side and is to be fixed to a predetermined work table, a rotating frame located at the distal end side of the base frame and having a cylindrical mount portion to which the cap frame is mounted so as to be positioned, a disc-shaped support located on the base frame to rotatably support the rotating frame, and a fitting portion located on the base frame to be fitted with an outer periphery of the disc-shaped support, thereby being rotatably supported on the base frame.

Abstract: The invention relates to a ship that is to be coupled electrically to a terminal, and also to a method and a method and a device for connecting an electrical power line (1) between a ship (3) and a terminal (5), comprising: unwinder means (7) for unwinding a traction cable (13) from the ship (3) towards a connection end (15) of said electrical power line (1); lashing means (9) for lashing said traction cable (13) to said connection end (15); and traction means (11) for pulling said electrical power line towards the ship (3) so as to connect said connection end (15) with an electrical interface (17a) of the ship (3).

Abstract: A sail propulsion system for boats and the like comprises at least one mast (A) and a jib (F) controlled by sheets and secured to the head of the mast (A), as well as at least two mainsails (RS, RD) rove on two shrouds (S; SR) located one to the right and one to the left of the mast (A) and arranged each on a boom (B) mounted on one of said shrouds (S; SR).

Abstract: A floating latticework is suitable for a latticework, a truss-frame structure and a net-shell structure over water. The floating latticework is the combination of a latticework (1) and a floating structure (2), or members of the latticework (1) in themselves are able to float. The floating structure (2) makes the latticework (1) floated over water, the surface of upper chords of which is in form of a platy structure or covered and fixed with a platy structure, as a plane used for loading. There is an advantage that the space-structure floating body is less influenced by wind and wave, which go through its space. A ship structure and a cofferdam structure are parallel solutions with the above solution. Their skeletons are net-shell structure, wherein they are provided with high structural strength.

Abstract: The present invention relates to a keel construction for a floating vessel, where a drop keel (3) can be adjusted from a retracted/extended position to an extended/retracted position for the purpose of varying the steering and gravity point of the floating vessel and through its construction also to be able to absorb impact in the event of a grounding with the drop keel (3). The drop keel (3) is connected with at least one around a fixed point extended and rotating element (7), where the extended and rotating element (7) is connected in the keel house (1) and further is connected with a fluid cylinder (6). An additional fluid cylinder (5) in the keel house (1) is connected to an upper end of the drop keel (3), which fluid cylinders (5, 6) can be controlled in order to readjust the drop keel (3) from a retracted position to an extended position (and vice versa) or to absorb the impact that the drop keel (3) is exposed to.

Abstract: An environmental screen for a boat includes at least one panel extending from a first attachment point on a boat to a second attachment point. A plurality of perforations are disposed through the at least one panel.

Abstract: A faulted circuit indicator device for mounting on an overhead conductor cable for electrical power distribution systems to detect an abnormally high electric current therein includes a housing having an enclosure formed therein and current sensing circuitry for detecting the presence of the abnormally high electric current in the cable. An indication unit is responsive to the current sensing circuitry to produce a visual indication in the presence of the abnormally high electrical current. A clamping mechanism formed of a yoke and a pair of opposed pressure plates is disposed above the housing for securely mounting the cable therein to detect the abnormally high electric current. Compression springs are provided for resiliently urging the pair of opposed pressure plates upwardly for automatically trapping the cable in a fixed central position between the yoke and the pair of opposed pressure plates.

Abstract: The present invention utilizes the unique shape recovery properties of shape memory materials, especially shape memory polymers, to provide an inexpensive and easily identified method of determining when a product has been exposed to environmental conditions that would make it likely that the product has expired or is unfit for use. By allowing the shape memory material to alter its shape from a deformed shape to a memory shape in response to exposure to environmental conditions while attached to a visual indication device a viewer can easily determine if a product has expired.

Abstract: A method for treating a product suitable for human consumption, for example, a meat product, such as slaughtered poultry or parts thereof, in which a large number of products are successively supplied, optionally in groups, to an inspection station in which each product is subjected to a visual inspection to detect a defect on the respective product. If a decision is made to provide a specific additive-addition treatment to a product, the product is supplied to an additive-addition station, where the product is subjected to an additive-addition treatment and an additive is added to at least one part of the outside of each product or the inside of each product.

Abstract: An image forming apparatus includes a generating mechanism to generate foam from a liquid or gel which may take a foam state, a coating roller having a peripheral surface supplied with the foam to coat the foam on the peripheral surface onto a surface of a recording medium, and a transport passage to transport the foam from the generating mechanism to the coating roller by an accumulation force of the foam.

Abstract: A roller painting kit comprising a roller cage adapter engageable over a roller section of a paint roller and having a substantially continuous cylindrical outer surface when engaged over the roller section, and a flexible roller cover insertable over the roller cage adapter, the roller cover being flexible so it can be rolled onto itself for storage. The roller cage adapter is radialy expandable to provide retention action between the roller cover and roller cage in an operative position.

Abstract: A moving module of a wafer ion-implanting machine includes a wafer carrier, a moving shaft, a base, a pair of first magnets, a fixture body, and a plurality of second magnets. One end of the wafer carrier is pivotally connected to a wafer tray; and the other end is fixed onto one end of the moving shaft. The base is fixed to the other end of the moving shaft. The moving shaft drives the wafer carrier and the base to move lengthwise. The pair of first magnets is fixed to the base. The fixture body is located between the pair of first magnets. The second magnets are fixed onto the fixture body and one of them forms compelling magnetic force between one of the first magnets. Thereby, the friction generated by contacting any of the first magnets with the fixture body can be prevented, thus increasing the production yield.

Abstract: A hollow-cathode discharge apparatus is disclosed for plasma-based processing. The hollow-cathode discharge apparatus includes a vacuum chamber, a hollow cathode disposed in the center of the vacuum chamber, a carrier for synchronously carrying a plurality of work-pieces in the vacuum chamber and a driving element for driving the carrier.

Abstract: The invention relates to carbon deposition by decomposing gaseous compounds with the aid of the SHF discharge plasma and can be used, for example, for producing polycrystalline diamond films (plates), which are used for producing output windows of power SHF sources, for example gyrotrons. Said invention ensures a high speed deposition of the high quality diamond films (having a loss-tangent angle ? equal to or less than 3×10?5 on supports whose diameter is equal to or higher than 100 mm. For this purpose, a SHF discharge is initiated in a gas mixture which is arranged in a reaction chamber and contains at least hydrogen and hydrocarbon. Afterwards, said gas mixture is activated by producing a stable nonequilibrium plasma with the aid of SHF radiation having a frequency f which is many times higher than a commonly used frequency of 2.45 GHz, for example 30 GHz.

Abstract: A molecular beam cell includes a crucible (2) for containing a material (29), a coil heater (3) for heating the material (29), and a side reflector (5) for reflecting the heat from the coil heater (3). The molecular beam cell further includes a base (7) supporting the crucible (2), the coil heater (3) and the side reflector (5). The base (7) is held by a disc-shaped flange (9) via a plurality of posts (20). A purge gas introduction pipe (44) for supplying purge gas (48) into the crucible (2) is provided, whereby ambient gas (36) is prevented from coming into contact with the material (29).

Abstract: Provided is a substrate processing apparatus. The apparatus comprises: a process chamber configured to accommodate substrates which are horizontally oriented and stacked in multiple stages and process the substrates; a process gas supply unit configured to supply a process gas to the process chamber; an inert gas supply unit configured to supply an inert gas to the process chamber; and an exhaust unit configured to exhaust the process chamber. The process gas supply unit comprises a process gas supply nozzle. The inert gas supply unit comprises inert gas supply nozzles disposed at both sides of the process gas supply nozzle. Each of the inert gas supply nozzles comprises at least one first inert gas ejection hole formed in a region where the substrates are stacked and at least one second inert gas ejection hole formed in a region where the substrates are not stacked.

Abstract: The present invention relates to equipment used to manufacture PV cells or modules. In some embodiments, a gas delivery and gas exhaust system are provided for processing a plurality of substrates. The gas delivery and gas exhaust system are designed such that the substrates are exposed in a uniform manner to the gas.

Abstract: The present invention is an animal and pet water bottle cap dispenser device, used in combination with a water bottle with a bottle top to dispense water to an animal or pet. The device has a flanged attachment sleeve, a flanged vertical middle sleeve and a dispersion ball that is set on the top surface of the vertical middle sleeve as water from the bottle runs internally through the sleeves and around the sides of the dispersion ball to the animal or pet for dispersed drinking. There is also a second cap, that is threadedly and removably integral with the middle sleeve, for covering the dispersion ball and the device, while the device is not in use. The device can be easily disassembled, separated, sterilized, sanitized and reassembled for sterilized or sanitary pet or animal usage, is dishwasher safe and is choke-free.

Abstract: Devices and methods are disclosed for the containment, hatching, and culture of aquatic and semi-aquatic organisms. Methods and device can be applied widely in the care and culture of aquatic and semi-aquatic organisms important in the aquaculture industry, aquarium and pet hobby, science instruction and education, environmental screening and toxicity testing, and the education-entertainment field.

Abstract: Devices and methods are disclosed for the housing and maintenance of aquatic, semi-aquatic, and terrestrial organisms. Methods and device can be applied widely in the care and culture of these species and will find wide applicability in the aquaculture industry, aquarium and pet hobby, science instruction and education, environmental screening and toxicity testing, and the education-entertainment field.

Abstract: A movement analysis device for rodents capable of variably adjusting a space where a rodent is placed in order to stimulate the behavior of the rodent so that motor functions of the rodent can be analyzed more effectively, The movement analysis device for rodents includes a body including a pair of side plates distanced from each other with a predetermined gap and a connector plate connecting one ends of the side plates together, the connector plate having a slit extending from one to the other one of the side plates; and an adjustment unit including an adjustment plate configured insertable between the side plates of the body and into the slit of the connector plate of the body and a support plate extending to a height reaching from a bottom to the slit to support the adjustment plate at one portion thereof. The support plate is semi-cylindrically shaped to form a cylindrical space together with the connector plate.

Abstract: A pet paw washing apparatus is disclosed. The pet paw washing apparatus includes a basin and a partition disposed in the basin separating a first chamber from a second chamber. A receptacle may be in the second chamber for receiving a paw through a lid for washing the paw in the receptacle. Water may be transferred via tilting motion using handle from the first chamber to the second chamber through a notch in the partition. Dirty water in the receptacle may be transferred via tilting motion using handle out of the receptacle and into the second chamber through a spout.

Abstract: The present invention is directed to methods for applying bovine foot and hoof treatment compositions having two or more specific and complimentary antimicrobial components in a hoof bath just prior to use to work more effectively. These antimicrobial components may include antimicrobial inorganic salts of certain heavy metals, cationic agents, peroxides, aldehydes, fatty acids, iodines or other suitable compounds effective in the killing of microorganisms.

Abstract: A device for application on an animal for deterring the animal from wound licking is provided. The device includes a flexible first layer of material and a deterrent composition in contact with the flexible first layer of material. A layer of adhesive is connected with the flexible first layer of material, and a second layer of material is connected with the layer of adhesive opposite the flexible first layer of material. A method for deterring an animal from licking a wound is also provided.

Abstract: In one embodiment, a training device may include a first module to receive a plurality of inputs that define a set of animal waste elimination behaviors. A second module may train an animal monitoring system based on the plurality of inputs. The training may facilitate use of the animal monitoring system with an irrigation system to reduce water consumption.

Abstract: A bio-diesel fuel engine system and bio-diesel fuel engine operating method capable of producing a biomass fuel from a liquid state biomass source material of a fat-containing vegetable or animal oil allowing fuel to be combusted in a conventional diesel engine while providing the benefits of low fuel consumption, stable engine operation, and extended engine service life, with compared to use a biomass fuel reformed by methyl-ester method.

Abstract: An arrangement for cooling oil in a gearbox in a vehicle which is powered by a combustion engine, the arrangement including an oil cooler, an oil system configured to circulate oil between the gearbox and the oil cooler, and a coolant circuit configured and operable to lead coolant to the oil cooler. The coolant circuit includes a radiator element for cooling the coolant and a line to lead the cooled coolant from the radiator element to the oil cooler. The coolant circuit has a flow-regulator to regulate the coolant flow through the radiator element for imparting to the coolant a temperature which makes possible a desired cooling of the oil in the oil cooler.

Abstract: A valve timing control apparatus for an internal combustion engine, includes a housing body, a vane rotor, a first plate, and a second plate. The housing body is formed integrally with a shoe at an inside periphery of the housing body, wherein the shoe projects inwardly in a radial direction of the housing body, and wherein the housing body is formed with a sealing recess at an axial end of the housing body. The vane rotor is rotatably mounted in the housing body, wherein the vane rotor includes a vane, wherein the vane and the shoe define advance and retard chambers adapted to supply and drainage of fluid. The first plate is fixedly inserted in the sealing recess of the housing body, the first plate sealing the axial end of the housing body. The second plate seals another axial end of the housing body.

Abstract: A control time adjusting device which adjusts the phase position of a camshaft with respect to an upstream drivetrain that drives the camshaft. The device has a hub element and a bell element which is coupled to the hub element in a variably adjustable manner with regard to the rotary phase position. The adjusting angle range is defined by stop structures. Additionally, adjusting cells, which are separated by radial webs and vane elements, are situated in an intermediate space between the hub element and bell element. The position and the peripheral length of the device, which is definitive for the pivoting travel of the adjusting cells and the arrangement of the vane elements with respect to one another, are adapted such that at least two different-sized adjusting angle ranges can be defined as a function of the assignment of the vane elements to the adjusting cells.

Abstract: A non-synchronous camshaft phasing device 46 for use with an internal combustion engine E. The internal combustion engine E includes an engine control unit ECU, a camshaft 42 and a crankshaft 12. The non-synchronous phasing device 46 is located between the crankshaft 12 and the camshaft 42 for controlling a phase shift angle between the camshaft 42 and the crankshaft 12. The phasing device 46 comprises an input shaft 36 coupled to the crankshaft 12 via a non-synchronous belt 40. The phasing device 46 also comprises an output shaft 42 coupled to the camshaft 44; a planetary gear train 48 co-axially aligned around and coupled with the input shaft 36 and the output shaft 42; and an motor 50 coupled to the planetary gear train 48 by a carrier 56.

Abstract: A method is for operating an ignition device for an internal combustion engine, particularly of a motor vehicle, having a laser device which has a laser-active solid having a passive Q-switch and which generates a laser pulse for eradiating into a combustion chamber, and having a pumping light source which provides a pumping light for the laser-active solid of the laser device. A point of ignition, at which the laser pulse is generated, is regulated to a specifiable setpoint value by setting a radiation intensity of the pumping light and/or a pumping duration and/or a pumping starting time and/or a wavelength of the pumping light.

Abstract: A lubricating oil composition is used in an internal combustion engine that uses a fuel containing at least one fat and oil selected from a group consisting of natural fat and oil, hydrotreated natural fat and oil, transesterified natural fat and oil and hydrotreated transesterified natural fat and oil. A polyol ester having a kinematic viscosity in the range of 3 to 8 mm2/s at 100 degrees C and/or a polybasic acid ester having a kinematic viscosity in the range of 3 to 8 mm2/s at 100 degrees C is mixed in an amount in the range of 5 to 30 mass % of a total amount of the lubricating oil composition as a base oil of lubricating oil.

Abstract: A thermal engine includes a cylinder and piston and an insulated thermal battery including at least a thermal mass such as the engine block itself for storing and retaining heat to enhance or cause fluid expansion within the cylinder and drive the piston, the thermal battery optionally including an electrolyte chamber containing a thermal electrolyte for functioning as an electric thermal battery. Heat is stored in the thermal battery such as by activating electric resistance heating elements in the thermal mass. The stored heat either causes expansion of a non-combustible expansion fluid such as water or enhances the expansion of a combustible expansion fluid such as gasoline. Where the thermal battery is an electric thermal battery containing an electrolyte, the storage of heat also stores electricity which can be used to power an electric motor.

Abstract: The fuel-injection device is characterized by an especially low-noise design. The fuel-injection device includes at least one fuel injector and a fuel rail having at least one pipe connection, the fuel injector being introduced into a receiving bore of the pipe connection, and the fuel rail having a discharge opening to supply fuel to the fuel injector. Provided between the fuel injector and the fuel rail is a pressure-wave guide connecting both, in such a way such that dynamic pressure fluctuations in the fuel injector are able to be routed largely past the volume of the receiving bore of the pipe connection. The fuel-injection device is especially suitable for the direct injection of fuel into a combustion chamber of a mixture-compressing internal combustion engine having external ignition, but it is also suitable for the injection of fuel into an intake manifold.

Abstract: A Fastening element has a carrier. A first pair of prongs branches off a first side face of the carrier designed to be in a mechanical engagement with a protrusion of a injector cup. A second pair of prongs branches off a second side face of the carrier. The second pair of prongs is designed to retain a fluid injector and to couple mechanically to a first protrusion of the injector. A pair of pins branches off a respective prong from the second pair of prongs at a respective inner side face of the respective prong. The pins are arranged opposed to each other and in a given distance from each other and they are designed to be in a mechanical engagement with the fluid injector. A clamping device being designed to couple mechanically with the fluid injector cup and to exert a repelling force on the fluid injector cup.

Abstract: A selectively movable assembly 10 having an engine 12 which includes a body portion 26 which includes a plurality of cylinders, such as cylinders 30, 32 and each cylinder includes a pair of selectively movable pistons, such as pistons 40, 42, whose use cause the engine 12 to be highly efficient while concomitantly providing a relative high amount of torque or output power.

Abstract: A ball-lift device with screw for a variable compression ratio engine having a hydraulic double-acting control actuator (8) including an upper chamber (121) and a lower chamber (122) and at least one actuator piston (13) connected to a control rack (7) includes: at least two balls (401, 402) or valve elements each resting on a seat (403, 404) and closing off respectively one and the other end of a transfer channel (405) connecting the upper chamber and the lower chamber of the control actuator, the balls acting as a nonreturn valve element when they are held on their seat by a spring (408, 409) in order to allow the hydraulic fluid to pass in only one direction; and lifting element (410) including at least one electric motor (480) designed to rotate at least one screw (481, 482) making it possible to lift from or place on its seat at least one ball.

Abstract: The ball-lift electrohydraulic valve for a hydraulic power unit of a variable compression ratio engine includes: at least two balls or valve elements each resting on a seat to close off a duct, the first duct connecting a high-pressure circuit of the hydraulic power unit to one of the stages of a multi-stage pressure amplifier that the power unit includes, while the second duct connects a low-pressure circuit of the power unit to the stage, the balls operating like a nonreturn valve element when they are held on their seat by a spring in order to allow the oil contained in the stage to go to the high-pressure circuit but not to return therefrom, and in order to allow the oil originating from the low-pressure circuit to enter the stage but not to leave it again, and lifting element making it possible to lift the balls or valve elements from their seat and allow the oil both to enter and leave the stage of the multi-stage pressure amplifier.