1521 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.

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 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.

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 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.

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.

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.

Well tools are provided which although pressure responsive, may be maintained by a hydraulic lockout in a nonresponsive condition until a threshold actuation step is performed. This lockout may be achieved by a hydraulic mechanism which controls the rate at which pressure is transmitted to a fluid spring during periods of increased pressure at the pressure source. When the tool is desired to be responsive to pressure cycles, a valve may be opened by established a differential between the pressure in the fluid spring and the pressure source. Communication of pressure in the fluid spring to a movable mandrel will then allow operation of the well tool in response to pressure cycles at the pressure source in accordance with the established design of the well tool.

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.