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 apparatus and method for the creation, placement and control of an area of electrical ionization within an internal combustion engine combustion chamber. This area of electrical ionization is positioned so that all of the fuel being injected into the combustion chamber must pass next to or through the area of electrical ionization to ensure that combustion has been initiated for all of the fuel as it is injected. This area of electrical ionization can be kept on as long as it is necessary to insure that the all of the fuel that is injected into the combustion chamber can be completely combusted. An engine equipped with this electrical ionization device has its fuel economy enhanced by timely, controlled, and complete combustion of all of the fuel injected into its combustion chamber. Furthermore, the pollutant emissions of both oxides of nitrogen and unburned hydrocarbons are reduced dramatically. Further, cold starting capability of this engine is greatly enhanced by a major reduction in the time necessary for the engine to warm up and a major reduction of pollutants created by the engine during the warm-up period. Additionally, this method of combustion also allows the engine to operate at a higher speed (rpm) allowing an increase in peak power output.

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.

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 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.

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.

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.

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 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.

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).