1534 results about "Pressure transmission" patented technology

The present invention relates to the medical field, in particular relates to the practice of percutaneous vertebroplasty where a pair of syringes in the distal extreme of a lengthened hydraulic device, are united by a camera of intermediate connection of larger diameter (pressure exerting body) or modified inverted syringe tube with a bolster, a hydraulic connecting tube of flexible material that transmits the pressure of the smaller diameter manual or impulsion syringe in the proximal extreme of the device toward the intermediate cylindrical larger diameter camera (pressure exerting body), this camera is in an inverted position with regard to the first syringe (fluid control), this intermediate camera has a moving piston longitudinal to the axis of the cylinder that is controlled with the first syringe (manual) and in cooperation with the atmospheric pressure. The injecting syringe loaded with bone cement is coupled with the bolster of the body of pressure, and to the needle that drives the cement toward the interior of the bone. The intermediate camera (pressure exerting body) together with the hydraulic tube and the manual syringe form a hydraulic press system (F / A=f / a) that allows to increase in a potential way the pressure exerted in the first syringe and to make the injection of polymethylmethacrylate (PMMA) at an approximate distance of 1.0 m to 1.5 m.

Devices and methods for left ventricular or biventricular pacing plus left ventricular pressure measurement. For example, a pacing lead having a combined electrode and pressure sensor assembly may be used for left ventricular (LV) pacing and pressure measurement. The assembly may include one or more electrodes, a pressure sensor, and a pressure transmission catheter. Such a pacing lead is particularly suitable for biventricular pacing and may be incorporated into a cardiac resynchronization therapy (CRT) system, for example.

A pressure vessel for processing at least one material in a supercritical fluid. The pressure vessel includes a self-pressurizing capsule for containing at least one material and the supercritical fluid in a substantially air-free environment, a pressure transmission medium surrounding the capsule for maintaining an outer pressure on the capsule, at least one heating element insertable in the pressure transmission medium such that the heating element surrounds the capsule, a temperature measurement means for measuring a temperature of the capsule, a temperature controller for controlling the temperature and providing power to the heating element, a restraint to contain and hold in place the capsule, the pressure transmission medium, and the heating element, and at least one seal between the restraint and the pressure transmission medium for preventing escape of the pressure transmission medium. Methods of using the pressure vessel, processing a material at high temperature and high pressure in the presence of a supercritical fluid within the capsule are also described.

A piezoelectric sensor arranged so as to includes: a transparent piezoelectric element having a piezoelectric property; and a pair of transparent conductor film layers opposed to each other with the piezoelectric element therebetween, the transparent piezoelectric element and the transparent conductor film layers are formed between a pair of transparent substrates, opposed to each other, which serve as pressure transmission means. Consequently, the transparent piezoelectric sensor has an excellent durability. A piezoelectric sensor comprises a piezoelectric element with a piezoelectric property which is made of a piezoelectric material having no Curie point and has a dipole orientation degree of not less than 75%. Consequently, the piezoelectric sensor having an excellent durability and a simple structure is provided at low cost.

A urinary catheter and method of its use for measuring the internal pressure of a human or other mammal. The catheter includes three lumens, or channels. The first lumen is dedicated to draining urine, the second lumen is dedicated to a retention balloon, and the third lumen is available for connection to a pressure transducer. In use, the catheter is installed in a patient, the third lumen is filled with a pressure transmitting medium, connected to a pressure sensor, and the patient's intra-abdominal pressure is monitored without interruption of the urine flow.

A piezoelectric sensor arranged so as to includes: a transparent piezoelectric element having a piezoelectric property; and a pair of transparent conductor film layers opposed to each other with the piezoelectric element therebetween, the transparent piezoelectric element and the transparent conductor film layers are formed between a pair of transparent substrates, opposed to each other, which serve as pressure transmission means. Consequently, the transparent piezoelectric sensor has an excellent durability. A piezoelectric sensor comprises a piezoelectric element with a piezoelectric property which is made of a piezoelectric material having no Curie point and has a dipole orientation degree of not less than 75%. Consequently, the piezoelectric sensor having an excellent durability and a simple structure is provided at low cost.

A submersible pump employs a sealed, oil-filled chamber with a moisture-sensing probe to detect the presence of any pumpage, such as water, which has leaked into the chamber. If contamination is detected, the pump may be shut down for repairs before it fails. Two mechanical seals are installed the lower seal is located between the pump and the oil chamber and an upper seal is located between the oil chamber and the motor. The improvement disclosed herein combines a pressurized oil accumulator with the pump oil chamber described above. The accumulator is divided into two compartments separated by a bladder, one compartment being connected to the reservoir of the pump and filled with oil for providing make-up oil to the reservoir and for accepting surplus (expansion) oil from the reservoir. The second compartment is pressurized and applies pressure to the bladder that, in turn, transfers the pressure to the oil in the first compartment and to the oil-filled chamber. The purpose is to pressurize the pump oil chamber in order to equalize pressure across the seals and thereby prevent failure of the seals or, at least, extend their life. The invention also includes apparatus for purging the motor casing with air and a pressure transducer for detecting a decrease in reservoir oil pressure.

A fuel injector injects high-pressure gaseous fuel directly into a cylinder of an engine. A small amount of liquid fuel is used in the injector to lubricate sliding portions of the fuel injector in addition to utilizing it as a medium for transmitting driving force. The fuel injector includes a nozzle member having injection holes at its elongated end and a needle slidably disposed in an elongated center hole of the nozzle member. The needle is driven by pressure of the liquid fuel introduced into a control chamber to open or close the injection holes. The pressure in the control chamber is controlled by a switching valve which is in turn driven by an actuator such as an electromagnetic or piezoelectric actuator. The liquid fuel is injected together with the high-pressure gaseous fuel after lubricating the sliding portions between the nozzle member and the needle.

A hydraulic pressure compensation system for valve actuator assemblies is described having particular application for subsea wellhead installations. The compensation system includes at least one valve actuator assembly having a housing that retains a reciprocable piston therewithin. The piston is spring biased into its fail safe configuration. The valve actuator assembly is hydraulically associated with an accumulator reservoir that defines a closed fluid reservoir and an open fluid reservoir that is exposed to ambient pressures. The two chambers are separated by a membrane. The valve actuator assembly is also operationally associated with a fluid pressure intensifier that boosts the ambient pressure of the accumulator so that an increased fluid pressure may be transmitted to the actuator assembly to bias the actuated valve toward its fail safe configuration. In a described embodiment, the fluid pressure intensifier comprises a housing that defines a chamber having a fluid inlet and fluid outlet. A dual-headed piston is moveably retained within the housing. The piston has an enlarged piston face and a reduced size piston face. Fluid pressure entering the fluid inlet is exerted upon the enlarged piston face, and due to the difference of piston face sizes, an increased pressure is transmitted out of the fluid outlet.

A process for applying digitally printed applique” indicia which results in decorative and identification elements for decoration and identification when applied to uniforms, fashion, “basic” and performance apparel, swimwear and intimate apparel as well as other textile products, the elements being an alternative to direct embroidery, embroidered emblems, thermo-transfer films, silk screen or sublimated printing. The production process includes the following phases (FIGS. 3A-C): a design phase (1); a separation phase (2); a printing phase (3); an optional traditional embroidery phase (4); and an etching / cutting phase (5). The process can incorporate embroidered elements but has the benefit of reducing or eliminating portions of stitching and or extra applique layers in the emblem. The resulting product has superior care and durability characteristics to screen printing and heat transfers as the image is more wash fast and can be ironed. The heat or pressure transfer capability can allow much faster customization of finished garments.

The invention provides a cover detection device and an electric pressure cooker with the same. The cover detection devices includes a body, an induction device which is arranged on the body, and a pressure transmitting device which is arranged on the body movably. A contact part contacted with the induction device is arranged on the press transmitting device. The pressure transmitting device has a first position contacted with the induction device and a second position separated with the induction device, and the induction device is above the contact part. The induction device of cover detection devices and electric pressure cookers with the same is above the contact part. When the liquid water flows from the pressure transmission device, the liquid water can be effectively prevented from contacting with the induction device, so as to avoid the failure of the induction device.

The invention relates to a water-based drilling fluid of a shale gas horizontal well reinforced well wall and an application thereof. The water-based drilling fluid comprises, by weight, 100 parts of water, 0-5 parts of clay, 0.5-3 parts of micro-nano particle blocking agents, 0.5-3 parts of chemical blocking agents, 0.1-2 parts of tackifier, 1-5 parts offiltrate reducer, 0.05-2 parts of encapsulating inhibiting agents, 0.1-3 parts of polyamine inhibiting agents, 1-5 parts of lubricant, 0.1-1 part of alkalinity regulator, 2-25 parts of inorganic salt, and 0-200 parts of weighting agents. The micro-nano particle blocking agents and the chemical blocking agents in the water-based drilling fluid of the shale gas horizontal well reinforced well wall have the effect of reinforcing the well wall in a cooperative mode, can effectively block micropore seams of shale to hinder pressure transmission, can further obviously improve the membrane efficiency of the shale, and facilitates the balance anti-collapse function of chemical activity.

A fuel injector is configured to inject gaseous fuel into a combustion chamber of an engine by using liquid fuel as a pressure transmission medium to open and close a nozzle hole. A nozzle portion has a fuel chamber and a tip end, which defines the nozzle hole. A first passage is configured to communicate the fuel chamber with a gaseous fuel passage to introduce gaseous fuel. A second passage is configured to communicate the fuel chamber with a liquid fuel passage to introduce liquid fuel. A passage switching valve is configured to switch the first passage and the second passage.

A pressure detection device includes a sensing part that outputs an electrical signal responsive to an applied pressure, a pressure receiving diaphragm that receives a pressure from a subject device, a cylindrical stem having a first end connected to the sensing part and a second end connected to the pressure receiving diaphragm, and a pressure transmission member located within the cylindrical member to transmit the pressure received by the pressure receiving diaphragm to the sensing part. In the pressure detection device, a side wall portion of the cylindrical stem has a spring portion which is provided to generate an elastic force in an axial direction of the cylindrical member. Accordingly, fluctuations in a spring characteristic acting on a pressure transmission mechanism of the pressure detection device can be effectively restricted by the spring portion.

A sensor arrangement (1) for measuring a pressure and a temperature in a fluid is disclosed. The sensor arrangement (1) comprises a temperature sensitive electrical element (3) and a pressure sensing electrical element (6), the temperature sensitive electrical element (3) and pressure sensing electrical element (6) are both coupled to one side of a metallic membrane structure (4,16). The metallic membrane structure is arranged to pass on the temperature of the fluid which is at the other side of the membrane structure (4,16) to the temperature sensitive electrical element (3) and to pass on the pressure in the fluid to the pressure sensing electrical element (6). In this way a combined pressure and temperature sensor is obtained which is applicable in vehicle air-conditioning systems working with CO2 as refrigerant.

Disclosed is a pressure transmission assembly for mounting to a robotic device having a rotatable end effector. The pressure transmission assembly includes a housing and a flexible pressure transmission member. The housing includes an input port and an output port. The flexible transmission member is coupled between the input port and the output port of the housing. The flexible transmission member is wound within the housing between the input port and the output port and is configured to receive a pressure signal at the input port and to transmit the pressure signal to the end effector through the output port.

A device measures pressures in animals and humans and includes a pressure transmission catheter (PTC) filled with a pressure transmitting medium and implantable in an area in having a physiological pressure. A transducer communicates with the pressure transmitting medium to provide a pressure signal representing variations in the physiologic pressure on electrical wires. A connecting catheter carries the electrical wires to signal processing and telemetry circuitry, which transmits a telemetry signal representing the pressure signal to a receiver external to the animal or human. A housing holds the signal processing and telemetry circuitry, but the transducer is remote from the housing. The device is particularly useful in measuring venous pressure, pulmonary pressure, bladder pressure, or intracranial pressure without significant head pressure artifact and with a sufficient dynamic response. One embodiment of the PTC includes a multi-durometer stem.

A protection system for a pipeline comprises a hydraulically actuated valve operable to switchably prevent a flow of fluid from a first section of the pipeline to a second section of the pipeline, a hydraulic fluid source for supplying hydraulic fluid to said hydraulically actuated valve to enable actuation thereof, a vent for venting hydraulic fluid from the hydraulically actuated valve, the hydraulically actuated valve being connected to the vent via a differential pressure valve to control venting of the hydraulically actuated valve, a pressure transfer barrier with a first port connected to the first section of the pipeline and a second port connected to said differential pressure valve, said differential pressure valve being supplied with hydraulic fluid at a reference pressure. If the pressure of fluid in the first section of pipeline exceeds the reference pressure of the hydraulic fluid supplied to the differential pressure valve, the differential pressure valve is caused to be in an open state, thereby causing the hydraulic pressure in the hydraulically actuated valve to be released via the vent. The protection system is of particular application to sub-sea hydrocarbon extraction wells.

A sticker weight pressurizer includes a base plate, a hanger which protrudes upwards from a center portion of the base plate, double-acting cylinders which are disposed on the base plate on opposite sides of the hanger, a pressure block on one end of a piston rod of each of the double-acting cylinders, a regulator valve which adjusts pressure of compressed air supplied from a pneumatic pressure source, and a direction control valve which transfers pressure, supplied from the regulator valve, to the double-acting cylinders while controlling the direction of the pressure.

The tunnel pipe trasporting installation vehicle is formed from tractor truck, pipe-carrying vehicle and electric and hydraulic control system. The tractor truck in cludes chassis, driven wheel groupand driving wheel group, power device and speed reducer, cabin, track-cleaning device, warning signal light and headlight; the pipe-carrying vehicle includes front wheel group, front platform, pipe-carrying vehicle beam, lifting wheel group, lifting tyre group, supporting device, pipe-carrying carriage on the pipe-carrying vehicle beam and pipe-carrying lifting device; the described hydraulic control system includes tractor truck static pressure transmission system and hydraulic control system of pipe-carrying vehicle. Said vehicle is compact in structure, stable in operation, can transport, lift and install large-diameter PCCP pipe.

Pressure-balanced accumulator apparatus for use in subsea operations is disclosed which comprises a housing and an accumulator within the housing at the first end of the housing. The accumulator has first and second chambers that are hermetically sealed from one another, with a pressurized gas in the first chamber and a pressurized fluid in the second chamber. A third chamber in the housing abuts the accumulator and contains silicon oil fluid. A movable piston is located within the housing proximate the second end of the housing. Ambient pressure is communicated to one end of the piston, and ambient pressure plus the pressure in the second chamber is communicated to the second end of the piston. The cross-sectional areas of the two ends of the piston are selected to optimize the pressure at which the piston begins to expel fluid from the second chamber.

The invention overcomes the defects of the traditional technical requirements such as high chowchow liquid concentration, and low chowchow liquid use ratio and processing efficiency, and discloses a preparation method of mango preserved fruit. By ensuring an exact ultrahigh pressure condition, the osmotic dehydration of the mango preserved fruit is accelerated to prepare low-sugar mango preserved fruit. The method is characterized in pressuring the mango by taking hydraulic pressure as a pressure transmission medium to sterilize, modify materiel, generate new organization structure and change the quality of the mango, so that the method has the characteristics of momentary compression, even reaction, safe operation and low energy consumption, and the prepared mango preserved fruit can well preserve the natural color smell and taste and the nutrition constituent of the mango, has special flavor, is sweet, tasty, refreshing and not greasy, has exquisite tissue, special taste and abundant nutrition, has abundant antioxidant components, is widely popularized, is particularly suitable for diabetes mellitus persons as the syrup is separated, and crates a new way for developing the edible and medical value of the mango.

The invention discloses an automatic three-portion and nine-pulse-taking information acquisition and recognition device and a method of MEMS (Micro Electro Mechanical System) hydraulic transmission touch. The method is characterized in that a hydraulic bionic probe acquires pulse fluctuation, and a pressure transmission medium is water. A microsensor array technology is adopted, and a 24-bit sensor measures the parameter attribute of a pulse wave digit form. The hydraulic probe is fixed by a double-layer band, so that interfere can be eliminated effectively, and the device is comfortable to use. The device integrates wrist, renying and fuyang pulse wave digit form detection, and synchronous and dynamic acquisition of aorta abdominalis, stomach and intestine electrophysiology signals, electrocardial and blood oxygen physiology signals, and the like, the signals are processed and analyzed by an MEMS technology, and a diagnosis result is obtained. The device is provided with a radio emission unit, and the signals can reproduce a pulse wave fluctuation state on a far-end bionic hand through remote reproduction, so that remote visual diagnosis can be achieved, and interaction support between experience of a doctor and datamation information is achieved. The device is provided with a health early-warning system, and sends an early-warning signal for abnormal measurement data.

A wrist brace includes a flexible main body having one or more pressure transmitting members disposed thereon designed to impart focused pressure on a tendon of interest.

According to the invention, a bottom hole assembly for drilling a cavity is disclosed. The bottom hole assembly may include a chassis configured to rotate. The chassis may include a primary fluid conduit, a secondary fluid circuit, a pressure transfer device, a plurality of pistons, a plurality of valves, and a plurality of cutters. The primary fluid conduit may be accept a first fluid flow. The secondary fluid circuit may have a second fluid flow. The pressure transfer device may be configured to transfer pressure between the flows. The pistons may be operably coupled with the secondary fluid circuit, and each piston may be configured to move based at least in part on a pressure of the secondary fluid circuit at that piston, with the valves possibly configured to control a pressure of the secondary fluid circuit at each piston. Each cutter may be coupled with one of the pistons.

In accordance with illustrative embodiments of the present invention, the arrangement of a combination stuffing box and pressure transmitter system for use with a reciprocating or rotating rod on pumps or pumping systems is disclosed. The stuffing box assembly includes a housing that holds a primary and second seal that are separated by a lubricating reservoir filled with a refined environmentally friendly sacrificial lubricant from the unknown fluid being pumped. The secondary seal transmits the pressure of the fluid being pumped to the sacrificial lubricant that is being sealed from the atmosphere by the primary seal. The secondary seal has its outside diameter sealing against the housing liner and has its inside diameter sealing on the pump rod. It is free to move with respect to the liner and the rod to transmit the pressure of the fluid being pumped to the sacrificial lubricant between the primary and secondary seals, as well as balance the pressure across the secondary seal. By design, any unbalance of pressure across the secondary seal will always be in the direction of the fluid being pumped. The primary seal operates under optimum conditions to prevent leakage of the refined safe lubricant, having known characteristics, to the environment.

The invention relates to the field of drilling fluid, and discloses a high-plugging-performance drilling fluid composition and a preparation method and application thereof. The high-plugging-performance drilling fluid composition contains water, bentonite, Na2CO3, a shale inhibitor, a filtrate loss reducer, a viscosity reducer, an anti-collapse agent, a nanometer plugging agent, a lubricant and aweighting agent, wherein the shale inhibitor is modified asphalt GLA, the anti-collapse agent is calcium carbonate superfine powder C80, and the nanometer plugging agent is nanometer graphene subjected to surface modification by polyethylene glycol. According to the high-plugging-performance drilling fluid composition, the modified asphalt GLA as the shale inhibitor, the calcium carbonate superfine powder C80 as the anti-collapse agent and the nanometer plugging agent are adopted for effectively plugging micro-nano cracks of the shale stratum of the large-displacement horizontal segment of a deep well, a drilling fluid phase is prevented from entering the cracks, the lasting and compact plugging barrier is formed near the well wall, and therefore pore pressure transmission is further prevented, the wedge effect of waterpower is further reduced, the block shedding phenomenon is avoided, collapsing of the stratum is effectively prevented, and the stratum is kept stable.