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.

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 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.

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 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 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).