83results about How to "Reduce peak pressure" patented technology

An implantable blood pressure regulator is provided. The blood pressure regulator includes at least one connection zone and an attenuation zone. The connection zone is suitable for connection to a body conduit, such as a blood vessel. The attenuation zone is movable from a first state to a second state in response to a physiological pressure spikes. The movement from the first state to the second state lowers a level of pressure or dampens a pressure spike in the body conduit.

An implantable blood pressure regulator is provided. The blood pressure regulator includes at least one connection zone and an attenuation zone. The connection zone is suitable for connection to a body conduit, such as a blood vessel. The attenuation zone is movable from a first state to a second state in response to a physiological pressure spikes. The movement from the first state to the second state lowers a level of pressure or dampens a pressure spike in the body conduit.

A system and methods are provided for combining systems of an upper stage space launch vehicle for enhancing the operation of the space vehicle. Hydrogen and oxygen already on board as propellant for the upper stage rockets is also used for other upper stage functions to include propellant tank pressurization, attitude control, vehicle settling, and electrical requirements. Specifically, gases from the propellant tanks, instead of being dumped overboard, are used as fuel and oxidizer to power an internal combustion engine that produces mechanical power for driving other elements including a starter / generator for generation of electrical current, mechanical power for fluid pumps, and other uses. The exhaust gas from the internal combustion engine is also used directly in one or more vehicle settling thrusters. Accumulators which store the waste ullage gases are pressurized and provide pressurization control for the propellant tanks. The system is constructed in a modular configuration in which two redundant integrated fluid modules may be mounted to the vehicle, each of the modules capable of supporting the upper stage functions.

The invention relates to a key management system and a key management method for bank terminal security equipment. The system comprises a bank service terminal and a bank service background; the bank service terminal comprises the bank terminal security equipment and a key management agent component; and the bank service background comprises a KMC, a key database, an encoder and a service application system server, wherein the key management agent component is used for acquiring a working key from the KMC and writing the working key into the bank terminal security equipment; and the KMC provides registration service, key transmitting service and automatic key update service for the bank terminal security equipment. The key management system and the key management method for the bank terminal security equipment can effectively realize key management of the bank terminal security equipment, and separate the key management from a bank service application system at the same time so that each service application system does not need to implement complex key management logics any more and the implementing complexity of the service application system is reduced.

The invention relates to the fracturing technology, in particular to a chemical and physical combined explosion fracturing device and a manufacturing method of the chemical and physical combined explosion fracturing device. The chemical and physical combined explosion fracturing device and the manufacturing method of the chemical and physical combined explosion fracturing device resolve the problems at the existing fracturing technology is limited in fracturing effect, narrow in application range and poor in use safety. The chemical and physical combined explosion fracturing device comprises a fracturing device outer shell, wherein the front portion of an inner cavity of the fracturing device outer shell is in interference fit with a powder chamber outer barrel, an inner cavity of the powder chamber outer barrel is provided with a powder screening pipe in a sleeved mode, a first explosion film is arranged on an opening in the rear end of the powder screening pipe in a sealing mode, an inner cavity of the powder screening pipe is filled with a powder pillar which is connected with an ignition line, a pressing nut is arranged on an opening in the rear end of the fracturing device outer shell in a sealing mode, a through hole penetrating through the front portion and the rear portion is formed between the front end surface and the rear end surface of the pressing nut, a second fracturing film is arranged on the through hole in a sealing mode, and the rear portion of the inner cavity of the fracturing device outer shell is filled with high-pressure CO2 in a sealing mode. The chemical and physical combined explosion fracturing device and the manufacturing method of the chemical and physical combined explosion fracturing device are suitable for the development of petroleum, natural gas, coal bed gas, shale gas and the like, and suitable for a pre-fracturing and permeability-increasing process of extraction of coal bed gas under a coal mine shaft.

A system for discharging inert gas for extinguishing or suppressing a fire is disclosed. A fluid discharge control arrangement is positioned in a fluid flow path between a pressurised gas supply 10A,10B,10C and the target fire suppression zone 20. The fluid discharge control arrangement reduces the pressure in the fluid flow path downstream thereof. This may allow the downstream pipework to be selected to withstand a lower pressure than in a conventional system in which the fluid discharge control device was not provided, thereby reducing costs. The fluid discharge control device may comprise a first valve 30 and first restrictor 26 in the first flow path 22 and a second valve 32 and a second restrictor 28 provided in the second flow path 24. Fluid from the containers 10A,10B,10C flows initially through flow path 24 and restrictor 26. Subsequently flow path 22 may be closed by optional valve 30, and flow path 24 is opened by valve 32. Fluid flow then passes through restrictor 28. This reduces the peak pressure in the downstream pipework 34. In another embodiment the discharge of inert gas from the containers 10A,10B and 10C is staggered to reduce the peak pressure in pipeline 34. A further embodiment provides a restrictor in the inlet 14A,14B,14C from each of the containers 10A,10B,10C to the manifold 16, thereby also reducing the peak pressure in the pipeline 34.

Wheelchair hand rim device comprised of a heat conducting tubular hand rim and a continuous circumferential elastomeric interface that has a cross-sectional contour comprised of an outwardly extending horizontal member having a proximal end coupled to an outboard side of a wheel rim transitioning into a downwardly depending member terminating to a distal end coupled to an inboard upper portion of the tubular hand rim such that a majority of the tubular hand rim is exposed and devoid of the elastomeric interface. When braking, a user only uses the heat conducting tubular hand rim. When pushing, the user grips across both the tubular hand rim and the contoured elastomeric interface, which deforms to fit the hand, thereby providing improved comfort, frictional coupling, and impact attenuation.

A dual stage hybrid inflation device includes a first stage gas source having a pressurized gas stored in a first stage pressure vessel and a second stage gas source having a pyrotechnic gas generator having a gas output directed into the first stage pressure vessel. The first stage pressure vessel is in fluid communication with an inflatable device such as an aircraft emergency evacuation slide via an externally actuated valve upstream of a pressure actuated valve such as a rupturable diaphragm. A control circuit provides a signal to the externally actuated valve to begin a flow of gases from first stage pressure vessel to a chamber on the upstream side of the burst diaphragm. The control circuit also sends a signal to the squib that initiates the pyrotechnic second stage gas source. As the pyrotechnic gas generator of the second stage gas source burns, the hot gaseous products of the second stage gas source mix with the pressurized gas stored in the first stage pressure vessel a predetermined time after the externally actuated valve opens.

The invention relates to a two-way plug-in mounting vibrating valve comprising a valve body and an electric hydraulic control loop. The valve body is plugged in a plug-in cavity of the valve body. The electric hydraulic control loop is used for controlling the operation of a hydraulic motor, and comprises a two-way plug-in valve, a control cover plate, a guide solenoid directional valve, an overflow valve and the like. The electric hydraulic control loop includes a directional auxiliary loop for controlling corotation and reversion of the hydraulic motor, an auxiliary loop for controlling stalling of the corotation and the reversion of the hydraulic motor, and another auxiliary loop for providing overload protection to the hydraulic vibration system of a pavement roller. The invention further relates to an electric hydraulic control unit comprising an exclusive-used vibrating controller for controlling the two-way plug-in mounting vibrating valve. By the aid of the vibrating controller, the operation time sequence of each solenoid valve can be controlled. By the invention, the hydraulic shock can be alleviated when a pavement roller starts oscillation, amplitudes and stops oscillation, peek value transmission of the hydraulic system can be reduced, and reliability and durability of the operation of the hydraulic components can be improved. The oscillation stop time is shortened and can be regulated and controlled, so that the working quality of the pavement roller is improved and the comfortableness of the drives is increased.

The invention concerns a single-piece part for producing a cable anchoring jaw. The single-piece part includes several angular portions arranged about a generally cylindrical duct, assembled by clamps adjacent to the duct. Each clamp is located at the bottom of one particular radial slot extending between two portions from the part periphery. Each clamp has towards its own particular slot a surface whereof a part at least is inclined relative to the direction perpendicular to the slot radial plane, such that the clamp radial thickness has a minimum in a specific position along the direction, thereby ensuring the position where the clamp will be broken to obtain the jaw wedges from the part portions, which enables to better control for clamping the cable strand in the jaw.

An implant system is described to decrease the risk of hip fracture in humans determined to be at increased risk for hip fracture, over a time span well over several years after implantation. This implant increases the size of the contact area on the proximal femur at the time of a fall, decreasing contact pressures and contact stresses. The implant may be able to absorb energy on impact or cause an increase of energy absorption by the soft tissues, thus decreasing the energy transfer to the proximal femur at the time of a fall. The implant may also strengthen the proximal femur, while minimizing stress shielding of the surrounding bone. In addition, it minimizes the risk of displacement should fracture occur, thus minimizing the risk of formal fracture surgery. The method of application minimizes risks associated with initial application of the implant.

An invention relating to a control apparatus and a control method for a hydraulically driven cooling fan for reducing the peak pressure produced upon reversing the switch position of a switching valve, without stopping an engine, and without greatly modifying existing hydraulic circuitry or increasing the apparatus cost. In the invention, in the case that a reversing switch has been operated so as to output a reversal processing commencement instruction signal, control is carried out such that, under the condition that the rotational speed of the engine has decreased to not more than a stipulated rotational speed, capacity adjusting means is controlled, so as to reduce the capacity of a hydraulic pump, and thus reduce the fan rotational speed, and then the switch position of the switching valve is reversed.

The invention relates to an optimized caching system based on an edge computing framework and application thereof. The optimized caching system comprises a plurality of local area networks, and the local area networks are connected with a cloud center through the Internet. Each local area network is an independent edge node cluster, and the edge node cluster comprises a router, a plurality of switches, a plurality of regional edge servers, a plurality of local edge nodes, a host or other storage devices which are sequentially connected from top to bottom. The edge node cluster is connected with the Internet through the router. The regional edge server is used for controlling a plurality of local edge nodes and storing hotspot content of the whole local area network. The local edge node isused for storing local hotspot content. The optimized caching system based on the edge computing framework is based on a traditional cloud-edge node-user terminal three-layer framework, and the distribution structure of edge nodes is optimized.

The invention belongs to the technical field of nuclear power plant reactor safety system design, and particularly relates to a small modular reactor passive self-pressurized reactor core water supply system. According to the small modular reactor passive self-pressurized reactor core water supply system, a refueling water tank is communicated with containment atmosphere, the headspace of a reactor pressure vessel is connected with a sprayer through a pressure reducing / pressurizing pipeline, the pressure reducing / pressurizing pipeline is provided with an electromagnetic valve, the sprayer is positioned in water on the lower portion of a self-pressurized water supply tank, the upper portion of the self-pressurized water supply tank is filled with nitrogen gas, the self-pressurized water supply tank is provided with a safety valve and is positioned in the refueling water tank, the refueling water tank is filled with water, the bottom of the self-pressurized water supply tank is connected with the lower portion of the reactor pressure vessel through a shared safe injection pipeline, the section of the pipeline is provided with a water supply tank check valve, the bottom of the refueling water tank is connected with the lower portion of the reactor pressure vessel through a shared safe injection pipeline, and the section of the pipeline is provided with a refueling water tank check valve. According to the present invention, with the simple principle, the small equipment and the low pressure bearing requirements, the small break loss of the coolant accident can be effectively relieved.

The invention discloses a two-way cartridge type vibration control valve which comprises a valve body, a direction control branch loop, a vibration stop branch loop and a safe branch loop. The direction control branch loop is inserted in the valve body and formed by four two-way cartridge valves and the like. The hydraulic impact of a road roller in the vibration starting process is reduced, the peak pressure of a hydraulic system is lowered, the work reliability and durability of a hydraulic element are improved, the vibration stop time is shortened, and the operation quality of the road roller and the comfort feeling of a driver are improved. Compared with the prior art, a two-way cartridge valve and a control cover plate component of the two-way cartridge valve are omitted, the size is reduced, and the hydraulic system is simpler, more convenient to maintain and lower in production cost. Meanwhile, in the two-way cartridge type vibration control valve, an adjusting flow valve is arranged between the branch oil path position, communicated with the first two-way cartridge valve and the fourth two-way cartridge valve, of an oil inlet connector and an oil return connector, and the vibration frequency of the road roller can be adjusted when needed.

A vehicle seat is such that a seating surface is formed by a plurality of pad block portions, each of which has a convex shape due to a pleat structure, that are fit together, with a sectional shape in a width direction of the seating surface being a concave shape. Even at a location of the seating surface formed in the concave shape that is affected by a difference in body shape of a seated person, a shape of the location is formed in a shape following the body shape of the seated person.

A process method for shared data in the on-line process system includes that a first service route and load balance unit routes the service request to a coherent service logic process unit for corresponding operation and process according to the contents requested by the service logic process and route rules to judge if it needs to process the service object, if not, the process result is fed back to the user by the first service route and the load balance unit, if it needs this, the related request if delivered to the service object process unit for related process and the processed result is fed back to the user finally by the second route and load balance unit, service logic process unit and the first route and load balance unit.

The invention relates to a method for operating internal combustion engine, particularly multi-cylinder internal-combustion engine, and an engine brake mechanism. In a brake valve, each cylinder has, additionally to the input and exhaust valves, at least one brake valve which leads into a common container (brake Rail). The brake valve is at least opened once before, at the beginning and / or during the compression phase of the cylinder. In order to regulate the brake power in a more simple way, the brake power of the engine brake mechanism is controlled by changing the control times of the brake valve.

A method and system to optimize the process a spreading the weight of supersonic aircraft downstream over a large area to reduce the pressure and intensity on the ground as function of air flow velocity, temperature, and / or pressure is provided.

The invention relates to a compressor (10) for generating compressed air for a commercial vehicle (12), wherein the compressor (10) comprises a housing (14) having a piston chamber (16) and a clearance (18) and a valve unit (20) having a locking body (22) for separating the clearance (18) from the piston chamber (16). The invention provides that the locking body (22) can be lifted from a valve seat (24) in the direction of the piston chamber (16) for opening the valve unit (20). The invention further relates to a method for relieving a compressor.

The invention relates to a two-way plug-in mounting type vibration control valve which comprises a valve body and an electric hydraulic control loop, wherein the valve body is inserted into a valve body inserting cavity, and the electric hydraulic control loop is composed of a two-way plug-in mounting type valve, a control cover plate, a two-position two-way hydraulic control direction valve, an overflow valve and the like and controls the operation of a hydraulic motor. The electric hydraulic control loop comprises a direction dividing loop controlling the hydraulic motor to rotate forward or reversely, a dividing loop controlling the hydraulic motor to stop rotating forward or reversely and a dividing loop providing overload protection for forward rotation or reverse rotation of the hydraulic motor. According to the two-way plug-in mounting type vibration control valve, the hydraulic shock can be relieved when a road roller starts vibrating, carries out amplitude of variation and stops vibrating, the peak pressure of a hydraulic system is reduced, and the working reliability and durability of a hydraulic element are improved. Due to the fact that the road roller automatically stops vibrating through hydraulic control, the vibrating stopping time is shortened, the probability that the whole road roller is resonant when the road roller stops vibrating is avoided, and the working quality of the road roller and the comfort of a driver are improved. The whole hydraulic system is simple in structure and small in number of elements, the control performance is improved, and cost is reduced.

A wind turbine blade and a method of moulding a wind turbine blade tip section. The overall wind turbine blade has an elongate structure extending in a radial sense in a finished wind turbine. The blade comprises a fairing that one is supported along its length by a spar extended along the full length of the fairing from the root end to the tip. The fairing is in two parts with a main part extending from the root for most the of the longitudinal length of the blade and the tip section forming the remainder of the blade.

The invention belongs to the field of two-way insert type oscillation control valves, and particularly relates to a novel two-way insert type oscillation control valve which comprises a valve body, a main loop, an oscillation stop branch loop and a no-load oil return branch loop. The valve body is provided with an insert cavity, an oil inlet connector, an oil return connector, a first working interface and a second working interface. The main loop is inserted in the insert cavity of the valve body, and comprises a pilot direction control loop composed of five two-way insert valves and a three-position four-way electromagnetic reversing valve. The oscillation stop branch loop comprises a control large oscillation stop and a control small oscillation stop. When an engine idles or a road roller does not oscillate, the no-load oil return of a hydraulic pump is achieved through the no-load oil return branch loop. An adjustable throttling valve is arranged between the oil inlet interface and the oil return interface and on the valve and is used for adjusting the flow entering a motor. The valve has the advantages that hydraulic impact during oscillation of the road roller is reduced, oscillation stop time is shortened, resonance of the whole machine is avoided, two oscillation amplitudes can be switched, and oscillation frequency can be adjusted within a certain range.

The invention provides an L algorithm-based digital currency anti-counterfeiting and verification method and system and equipment. The method comprises the following steps of: splitting an anti-counterfeiting secret key corresponding to a digital currency public key stored by a credible center into a stub secret key stored in the credible center, a digital currency secret key stored in a digital currency and a nonterminal stored user secret key; carrying out primary updating on the digital currency secret key by a transmission end so as to generate a digital currency ciphertext, and offline circulating the digital currency ciphertext to a reception end; carrying out local counterfeit currency detection by the reception end so as to verify authenticity of the digital currency, and after theverification succeeds, carrying out secondary updating on the digital currency secret key and sending a first signature and currency number information to the credible center to carry out verification; and verifying state effectiveness by the credible center, if the verification succeeds, verifying a second signature, and if the verification succeeds, updating the digital currency secret key. According to the method and system and the equipment, safety risk of double blossoms is reduced, mass data downloading problems caused by book-entry anti-counterfeiting are avoided, the risk of managingdigital assets via user secret keys is reduced and the safety is high.

A wind turbine blade and a method of moulding a wind turbine blade tip section. The overall wind turbine blade has an elongate structure extending in a radial sense in a finished wind turbine. The blade comprises a fairing that one is supported along its length by a spar extended along the full length of the fairing from the root end to the tip. The fairing is in two parts with a main part extending from the root for most the of the longitudinal length of the blade and the tip section forming the remainder of the blade.

The invention relates to a compressor (10) for supplying compressed air to a utility vehicle (12), said compressor comprising a drive engine (20), wherein the compressor (10) is driven by the drive engine (20) via a transmission (26) having a transmission ratio that is less than one and comprises a piston chamber (14), a clearance volume (16) and a valve device (18) for switching the clearance volume (16). According to the invention, the valve device (18) is configured in such a manner that the air stream supplied by the compressor (10) can be reduced to a value that is different from zero by activating the clearance volume (16). The invention further relates to a method for controlling a compressor (10) for supplying compressed air to a utility vehicle (12).

In order to suppress the occurrence of a peak pressure inside a motor case (M) without compromising the cooling effect of a hydraulic motor (12), a hydraulic drive device includes, the hydraulic motor (12) which is operated by an oil being circulated through a main oil path (13A) and a main oil path (13B) which are connected to the motor case (M), a low-pressure selection valve (31) which is operated depending on a differential pressure between the main oil path (13A) and the main oil path (13B) so as to discharge the oil in the main oil path (13B) into the motor case (M), and a tank oil path (33) connecting the inside of the motor case (M) to an oil tank (T), wherein a choke aperture (100) by annular gap flow is interposed in the low-pressure selection valve (31).

The invention relates to vegetable oil and ester ether biodiesel produced by using vegetable oil and ester ether as raw materials and new use of the vegetable oil and ester ether biodiesel as a common diesel additive. The vegetable oil and ester ether biodiesel has a chemical structural formula shown below, wherein in the formula, R1 is hydrocarbyl of fatty acid in vegetable oil and the number of the carbon atoms, the number of unsaturated double bonds and the chemical structure of the R1 are determined by the fatty acid component in the vegetable oil; the values of x and y are integers ranging from 1 to 10; and z is an integer ranging from 1 to 4. Compared with the conventional vegetable oil, methyl ester and ethyl ester biodiesel, the biodiesel has a better emission property higher combustion performance, can be used alone as a substituting fuel or used as a clean additive for common diesel and a cetane number modifier and can lower the ignition point, ignition delay and combustion surge pressure of the engine; a pressure rise rate curve is shifted forward, a peak value is lowered; a heat release rate curve is shifted forward, a peak value is lowered; the carbon smoke emission is reduced; the CO emission under a rotation speed load property is lowered slightly; HC emission is reduced; and NOx emission is lower compared with diesel.

A conduit connection assembly including a first conduit part and a second conduit part, adapted to be assembled to form a conduit connection delimiting a first fluid conducting volume, wherein the conduit connection assembly presents a second fluid conducting volume, the first and second fluid conducting volumes being arranged to communicate with each other via a pressure change inducing device so as to form a common fluid guide, whereby during use of the conduit connection assembly the pressure in the first conducting volume is higher than the pressure in the second conducting volume, in that a cavity is formed between the first and second conduit parts at a distance from the first conducting volume, and a draining connection is adapted to provide a communication between the cavity and the second fluid conducting volume.