2154 results about "Stress control" patented technology

A method for providing a User Interface (UI) based on a touch pressure and an electronic device using the same are provided. The UI providing method of the electronic device detects a touch pressure of a single touch input through a touch screen of the electronic device, and controls the electronic device based on the touch pressure. Since various UIs can be provided based on the touch pressure applied by the user in the touch screen, user convenience and entertainment can be improved.

In one embodiment, a method for drilling a wellbore includes an act of drilling the wellbore by injecting drilling fluid through a tubular string disposed in the wellbore, the tubular string comprising a drill bit disposed on a bottom thereof. The drilling fluid exits the drill bit and carries cuttings from the drill bit. The drilling fluid and cuttings (returns) flow to a surface of the wellbore via an annulus defined by an outer surface of the tubular string and an inner surface of the wellbore. The method further includes an act performed while drilling the wellbore of measuring a first annulus pressure (FAP) using a pressure sensor attached to a casing string hung from a wellhead of the wellbore. The method further includes an act performed while drilling the wellbore of controlling a second annulus pressure (SAP) exerted on a formation exposed to the annulus.

A stress cone for reducing electrical stresses is disclosed for use on terminated ends of tubing encapsulated power cable used in surface applications in a subsurface well power system employing electric submersible pumps (ESPs). The stress cone comprises an annular section about a longitudinal axis for receiving a terminated end of the TEPC in its first end and for abutting the terminated metal TEPC end against a metal shoulder at its second end therein, and an insulation chamber axially aligned with and connected to the annular section. The chamber comprises a metal interior surface symmetrical about the axis. The insulated TEPC core (without outer metal sheath) passes through the insulation chamber along the axis and then exits. The ID of the TEPC metal sheath and the inside metal surface of the chamber form a smooth ground plane transition surface. Insulation material surrounds the TEPC insulation layer within the insulation chamber.

A system and method for controlling formation pressures during drilling of a subterranean formation utilizing a selectively fluid backpressure system in which fluid is pumped down the drilling fluid return system in response to detected borehole pressures. A pressure monitoring system is further provided to monitor detected borehole pressures, model expected borehole pressures for further drilling and control the fluid backpressure system.

The present invention is an oral irrigator comprising a pump, a discharge nozzle and a pressure control. The pump has a generally constant operating speed and feeds the discharge nozzle. The pressure control is adapted to modify a discharge pressure at the nozzle without a significant change in pump speed. The pressure control modifies a level of fluid flow restriction between the pump and the nozzle. The modification of the level of fluid flow restriction is accomplished by modifying aspects of a fluid flow path extending through the pressure control. The aspects modified include the diameter, length and/or number of direction changes of the fluid flow path.

The present invention provides a semiconductor device including n-channel field effect transistors and p-channel field effect transistors all of which have excellent drain current characteristics.

In a semiconductor device including an n-channel field effect transistor 10 and a p-channel field effect transistor 30, a stress control film 19 covering a gate electrode 15 of the n-channel field effect transistor 10 undergoes film stress mainly composed of tensile stress. A stress control film 39 covering a gate electrode 15 of the p-channel field effect transistor 30 undergoes film stress mainly caused by compression stress compared to the film 19 of the n-channel field effect transistor 10. Accordingly, drain current is expected to be improved in both the n-channel field effect transistor and the p-channel field effect transistor. Consequently, the characteristics can be generally improved.

This invention creates a convenient low cost water pressure driven multi user oral cleansing device, the DentalJet with exchangeable color coded nozzle/handle which is easy to use, needs no electricity. The invention uses a faucet attachable rotating diverter, a flexible longer food grade PVC tube and interchangeable color coded jet nozzle/handle. The diverter also functions as a fine water volume/pressure control with a preset temperature and filter. Water pressure bulges up the flexible rubber tube clamped to the end of the adapter and to the PVC tubing. Inside the handle the water pressure created friction keeps the hose adapter in solid coupling while the pressure is on. The rubber tube oscillates, as pulsating water exist at the nozzle. When the water pressure is removed, color coded nozzle/handle is exchangeable.

Inkjet apparatus includes: a tank; a first flow channel; a first liquid chamber; a second flow channel; a second liquid chamber; a first liquid movement; a second liquid movement device; a first pressure determination device; a second pressure determination device; a pressure control device which controls pressures in the first and second liquid chambers by respectively controlling the first and second liquid movement devices, in accordance with determination results of the first and second pressure determination devices, in such a manner that the internal pressures of the first and second liquid chambers respectively remain at the target pressures; a circulation path through which the liquid inside the first liquid chamber is circulated without passing through the inkjet head; and a deaeration device which is provided at an intermediate point of the circulation path and which removes dissolved gas.

The present invention relates to a bag type paste-injecting hole-sealing equipment and its hole-sealing method. Said bag type paste-injecting hole-sealing equipment includes the following several portions: bag, internal end supporting component, middle portion supporting component, external end supporting component, paste injection control valve, reverse check valve and pressure control pin. Besides, said invention also provides the concrete steps of said hole-sealing method.

A pressure support system and method of treating disordered breathing that optimizes the pressure delivered to the patient to treat the disordered breathing while minimizing the delivered pressure for patient comfort. The controller in the pressure support system operates as a set of prioritized control layers, wherein each control layer competes for control of the pressure generating system to implement a unique pressure control process. The pressure support system also controls the pressure provided to the patient based on the variability of the monitored data and a trend analysis of this data, including an indication the skewness of the patient's inspiratory waveform.

A semiconductor device and method for forming the same for improving charge mobility in NMOS and PMOS devices simultaneously, the method including forming a first dielectric layer including a stress type selected from the group consisting of tensile stress and compressive stress over the respective PMOS and NMOS device regions; removing a portion of the first dielectric layer overlying one of the PMOS and NMOS device regions; forming a second dielectric layer including a stress type opposite from the first dielectric layer stress type over the respective PMOS and NMOS device regions; and, removing a portion of the second dielectric layer overlying one of the PMOS and NMOS device regions having an underlying first dielectric layer to form a compressive stress dielectric layer over the PMOS device region and a tensile stress dielectric layer over the NMOS device region.

A method and apparatus is disclosed for determining pressure provided by a pump of a topical negative pressure (TNP) system. The method includes the steps of determining a value associated with a measured pressure, determining a difference between the measured pressure value and a predetermined desired value and increasing or decreasing a speed of pumping of the pump responsive the to difference.

An enteral feeding unit or system that minimizes the occurrence of gastro-esophogeal-pharynegal reflux during feeding is described. The enteral feeding unit or device includes an automatable feeding pump with a feedback sensor for sensing a relative pressure in a patient's stomach and esophagus, and a regulator system for controlling or monitoring feeding rate to said patient as a function of said relative gastro-esophageal pressure. The system includes a stomach probe that has a fluid-tight closure of the esophagus. The stomach probe, according to the invention, is characterized by a tampon-bladder for watertight closure of the esophagus, in which the tampon-bladder forms from flexible and/or elastic material at least a closed inner cavity for the reception of a fluid medium, through a means (11) of establishing a prescribed pressure for the medium in the tampon-bladder (16) by an inner lumen forming the actual stomach probe, from which an outer hose-like lumen (18) extending to the tampon-bladder (16) is so arranged that between the outer lumen (18) and the inner lumen (17) a channel is formed connected to the inner cavity of the tampon-bladder (16) arranged on the outer lumen (18) by a number of openings (20), whereby the inner cavity of the tampon-bladder (16) is connected via the canal formed between the inner and outer lumina (17, 18) with the means of production of pressure in the tampon-bladder, that is, with a suitably graded reservoir or equalizing vessel (11) for the liquid medium situated above the tampon-bladder and outside the patient.

An inkjet recording apparatus has: a recording head of an inkjet type having a liquid ejection surface where a plurality of nozzles which eject liquid are arranged, a supply port which supplies the liquid to an internal flow channel connected to the plurality of nozzles, and an outlet port which is connected to the supply port via the internal flow channel and through which the liquid in the internal flow channel is expelled; a first liquid chamber which is connected to the supply port of the recording head via a first external flow channel; a second liquid chamber which is connected to the outlet port of the recording head via a second external flow channel; a liquid buffer chamber which stores the liquid supplied from a liquid supply source; a first connecting flow channel which connects the first liquid chamber to the liquid buffer chamber; a second connecting flow channel which connects the second liquid chamber to the liquid buffer chamber; a first pressure determination device which determines an internal pressure of the first liquid chamber; a second pressure determination device which determines an internal pressure of the second liquid chamber; a liquid movement device which moves the liquid between the first liquid chamber, the second liquid chamber and the liquid buffer chamber; and a pressure control device which controls the liquid movement device in accordance with determination results of the first pressure determination device and the second pressure determination device in such a manner that interiors of the first liquid chamber and the second liquid chamber respectively assume prescribed pressures, wherein the pressure control device controls the liquid movement device so as to adjust the internal pressures of the first liquid chamber and the second liquid chamber in such a manner that a prescribed pressure differential between the internal pressures of the first liquid chamber and the second liquid chamber is produced and a prescribed back pressure is applied to the liquid inside the plurality of nozzles of the recording head.

A drilling system for drilling a bore hole into a subterranean earth formation, wherein at least a portion of the mud flow from the primary mud pump is diverted to the mud discharge outlet, thereby creating a backpressure system to readily increase annular pressure.

An apparatus for securing a tubular member within a liner or borehole has a seal means connected within the tubular member, and a pressure control device operable to increase the pressure within the tubular member, such that operation of the pressure control means causes the tubular member to move radially outwardly to bear against the inner surface of the liner or borehole wall. Also, a packer for use in a downhole annular space and an isolation plug for plugging a downhole tubular are disclosed.

Force balancing adjusts hydraulic fluid pressure in an upper piston area of a Rotating Pressure Control Device (RPCD) that has an inner housing rotatably engaged within an outer housing by an upper bearing and a lower bearing. The hydraulic fluid pressure is adjusted to balance net force in a upper piston area and a lower piston area. The fluid pressure adjustment creates a force differential that balances the total load transmitted through the upper bearing and the lower bearing and thereby extends the life of the sealing element and bearings. Additionally, a wear indicator signals the end of the useful life of the drill pipe sealing element.