1453results about How to "Control pressure" patented technology

The present invention, discloses an anastomosis clip applicator device for applying a surgical clip, formed at least partly of a shape memory alloy, to press together adjacent wall portions of adjacent hollow organ portions so as to effect anastomosis therebetween. The applicator device includes: gripping apparatus for gripping a surgical clip, a release mechanism, associated with the gripping apparatus, and tissue cutting apparatus, operatively associated with the gripping apparatus. There is also apparatus for activating the gripping apparatus, the release mechanism and the cutting apparatus, so as to introduce and apply the surgical clip into adjacent hollow organ portions, such that the surgical clip compresses together the adjacent walls of the hollow organ portions, and thereafter causes the cutting apparatus to perforate the adjacent pressed together organ walls to provide patency through the joined portions of the hollow organ.

A method of cementing a tubular string in a wellbore includes: deploying the tubular string into the wellbore; pumping cement slurry into the tubular string; launching a cementing plug after pumping the cement slurry; propelling the cementing plug through the tubular string, thereby pumping the cement slurry through the tubular string and into an annulus formed between the tubular string and the wellbore; and controlling flow of fluid displaced from the wellbore by the cement slurry to control pressure of the annulus.

Hydraulic fracturing of wells by injecting a degradable polymer phase as a fracturing fluid is provided. Composition and degree of polymerization of the degradable polymer and the selection of additives may be varied to adjust the viscosity, degradation time and other properties of the fracturing fluid. Viscous degradable fluid or pellets of degradable polymer may be placed in a wellbore as an internal phase in a low viscosity carrier fluid. A polymer-continuous liquid phase may be formed at a selected location in the wellbore, usually near perforations, before the polymer phase is pressured into a formation to form a hydraulic fracture.

A printing fluid dispenser including a deformable container of printing fluid having an outlet, a handle arranged to apply pressure to said container in order to force ink through the outlet; and a resilient member arranged to limit pressure applied to the deformable container by the handle in order to prevent rupture of an external reservoir coupled to said dispenser in use.

The invention provides devices that can be used to deliver a therapeutic agent to a treatment site within the vessel of a patient at increased pressure, while limiting the contact with and pressure placed on the vessel walls. Devices according to the invention include an expandable structure arranged around and on a tube having a lumen. The expandable structure may include a sealing ring that makes contact with the interior surface of a vessel to prevent or decrease fluid flow during delivery of a therapeutic agent. This allows delivery of a therapeutic agent with decreased risk of injury to the treatment site. The invention also provides for large lumen diameters, preventing shearing stress on therapeutic agents such as cell slurries.

An inertial gas-liquid separator and method is provided, including variable orifice jet nozzle structure having a variable orifice area dependent upon axial movement of a plunger relative to a housing sleeve, and in another embodiment having first and second flow branches, with the first flow branch being continuously open, and the second flow branch having a variable flow controller controlling flow therethrough.

A static mixer for an exhaust gas system of an internal combustion engine with which at least two different fluid streams are mixed almost homogeneously after a short mixing distance, and with which back-flow effects and pressure losses are avoided, to the greatest possible extent. Due to the placement of flow guide devices, the inclined front sections of which are disposed alternately facing in different directions, and by the configuration and placement of the fluid passage spaces, which are delimited by guide elements, intensive and homogeneous mixing of two different fluid streams is achieved, while avoiding turbulent flows and pressure losses. Mixing of the fluid streams is supported by guide vanes that are disposed on the flow guide elements in the front region of the central center element, and on a frame that delimits the inclined sections of the flow guide elements.

A packaging and applicator device of the type comprising an applicator having an application portion and a receptacle capable of being closed, the receptacle defining a first housing for the substance and a second housing which, in the closed position of the receptacle, receives the application portion of the applicator, the first and second housings communicating via an opening of cross-section that is substantially identical to that of the first housing, said opening enabling the application portion to be put into contact with the substance. The second housing defines a bearing surface around at least a portion of said opening so as to limit the pressure that can be exerted by the application portion on the substance when the receptacle is closed.

The invention discloses a time-delay boosting electric pressure cooker which comprises a cooker body, wherein a controller, a connecting plate, a sliding chute, a sliding block, a supporting rod, a cooker cover, a handle, an exhausting column, a gas outlet head and an electromagnetic valve are arranged on the cooker body; the controller is fixedly connected in front of the cooker body; the connecting plate is fixedly connected to the upper right of the cooker body; the sliding chute is located inside the connecting plate; the sliding block is movably connected inside the sliding chute; the supporting rod is fixedly connected to an upper end of the sliding block; the cooker cover is fixedly connected to a left end of the supporting rod; and the handle is fixedly connected to an upper end ofthe cooker cover. The controller, the electromagnetic valve and a temperature sensor can be combined to effectively control the pressure in the electric pressure cooker when cooking rice, and rapidlyabsorb enough water when the interior of the cooker is in a semi-high pressure state; the electromagnetic valve is controlled to be closed by the controller after reaching a set time, and then the cooker continues to boost.

Method for hydraulic fracturing of wells by transporting a cross-linked polymer containing a proppant down a wellbore in a carrier fluid, allowing the cross-linked polymer to coalesce into a polymer phase and squeezing the cross-linked polymer as a fracturing fluid is provided. Composition of the cross-linked polymer solution and the selection of additives may be varied to adjust the viscosity, degradation time and other properties of the fracturing fluid.

A supercritical heat pump cycle system includes a low-pressure determining unit for determining a pressure of a low-pressure refrigerant after being decompressed in a decompression unit, a target temperature setting unit for setting a target temperature of the fluid, and a target pressure determining unit for determining a heating target control pressure in a refrigerant radiator based on the pressure of the low-pressure refrigerant and the target temperature of the fluid during the heating operation. In the supercritical heat pump cycle system, the decompression unit is controlled so that a refrigerant pressure in the refrigerant radiator becomes the heating target control pressure. Accordingly, heating capacity of the refrigerant radiator can be effectively increased.