106results about How to "Reduce pressure changes" patented technology

A plethysmogram signal is sensed from a patient and provided to a programmer device for monitoring the condition of the patient and for optimizing pacing parameters of a cardiac device implanted in the patient. The programmer device analyzes the plethysmogram signal for cardiac performance associated with different pacing parameters. The cardiac performance is indicated by, for example, a pulse amplitude response, a degree of pulsus alternans, or irregularity in the pressure pulses detected in an atrial fibrillation patient. The pacing parameters resulting in the best cardiac performance are selected as the optimum pacing parameters. In one embodiment, the programmer device monitors a Valsalva maneuver performed by a patient. Optimum pacing parameters are derived by analysis of the plethysmogram signals obtained during performance of the Valsalva maneuver while the patient is paced using different pacing parameters.

A gas separation system includes a stator, and a rotor rotatably coupled to the stator, and at least one surge absorber in communication with the stator. The stator includes a stator valve surface and a plurality of function compartments opening into the stator valve surface. The rotor includes a rotor valve surface in communication with the stator valve surface, and a plurality of flow paths for receiving adsorbent material therein. The rotor also includes a plurality of apertures provided in the rotor valve surface and in communication with the flow paths for cyclically exposing the flow paths to the function compartments. The surge absorbers are configured to reduce pressure variations in the function compartments and to maintain each function compartment at one of a plurality of discrete pressure levels. In this manner, substantially uniform gas flow can be maintained through the function compartments and the flow paths without recourse to multistage compression machinery.

A method and device are provided for maintaining or improving the audibility, localization and/or intelligibility of sounds from electro-acoustic devices worn on the head or in the ear, such as headphones, headsets, hearing protectors, earplugs, and earbuds, as well as in combination with or built into hard hats and helmets, and for improving their comfort to the user.

Provided are a gasket member for a substrate-holding container which is little liable to contamination of the substrate materials contained with organic matters due to the low content of organic matters to be emitted as a gas still without decreasing the operability in opening and closing of the covering as well as a substrate-holding container by using the same. The gasket member for a substrate-holding container provided is formed from a thermoplastic polyester-based elastomer resin containing absolutely no softening agent and having a surface hardness not exceeding 80A by the hardness testing method specified in JIS K6301, of which the amount of gas emission as determined under heating conditions for 60 minutes at 80° C. does not exceed 10 ppm based on the weight of the material. Disclosure is given of a polyester-based block copolymer suitable as a molding material of the said gasket member.

An infrared-type gas detector is provided with a Fabry-Perot filter through which infrared having a predetermined wavelength is selected to pass, a first detection unit for receiving the infrared having passed through the Fabry-Perot filter and outputting a detection signal corresponding to an absorption amount of the infrared, and a case member having a window portion through which the infrared passes and housing therein the first detection unit and the Fabry-Perot filter in an inner space of the case member. The case member has at least one ventilation portion through which the inner space of the case member is communicated with the exterior of the case member.

A stable kinetic performance is to be exhibited even in the case of such a small-sized slider as Femto slider. In one embodiment, an air bearing surface (ABS) of a slider comprises a first pad constituting portion extending from a leading edge side to a trailing edge side, a second pad constituting portion and a third pad constituting portion formed on both sides of the first pad constituting portion and extending from the leading edge side to the trailing edge side, a connecting pad for connecting the first, second, and third pad constituting portions on the leading edge side, a first negative pressure portion formed by the first and second pad constituting portions and the connecting pad, a second negative pressure portion formed by the first and third pad constituting portions and the connecting pad, and an air trap portion formed on the leading edge side of the connecting pad.

An interface is formed by pressing a patterned first surface and a second surface together, with a particle-loaded interface material in between. The first surface is fabricated with a pattern of channels designed to redistribute the velocity gradients that occur in the interface material during interface formation in order to control the arrangement, orientation and concentration of particles at the end of the interface formation. The concept finds application in thermal interfaces and controlled placement of nano and micro particles and biological molecules.

The inkjet recording apparatus includes: an inkjet recording head which includes a nozzle through which liquid is ejected; a pressure regulating unit which includes a liquid chamber that communicates with the nozzle and a gas chamber that is partitioned from the liquid chamber by a flexible film; and a liquid chamber pressure controlling device which controls a pressure of the liquid chamber to a predetermined negative pressure when carrying out back pressure control in which back pressure is applied to the liquid inside the nozzle, wherein: the flexible film causes change in the pressure of the liquid chamber when the liquid is supplied for at least a predetermined supply amount to the liquid chamber in a state where the gas chamber is open to air; and the liquid chamber pressure controlling device carries out the back pressure control after controlling the pressure of the liquid chamber to a predetermined value of positive pressure by supplying the liquid of at least the predetermined supply amount to the liquid chamber.

In a driver device, a controller substrate has a center part on which a rotation angle sensor is attached and an outer periphery portion which is fixed onto a heat sink. The heat sink has a cylinder part extending in an axial direction of the rotation shaft to contact the outer periphery portion of the controller substrate. The cylinder part of the heat sink is continuously formed along an entire periphery and has the same height at all portions. Such configuration provides an even deformation distribution of the cylinder part due to a temperature change, thereby reducing unevenness of heat stress distribution along a substrate plane and decreasing stress applied to the sensor, which facilitates a reduction of a detection error of the sensor.

A liquid discharge head includes a nozzle that discharges liquid droplets, a common liquid chamber that supplies liquid to an individual liquid chamber that is in communication with the nozzle, and a filter plate that is arranged in a liquid flow path of the common liquid chamber. The filter plate includes a filter part that filters the liquid and a damper part that reduces a pressure variation in the common liquid chamber, and the filter part is arranged to be thicker than the damper part.

A method of using the natural gas storage facility to reduce the effect of diurnal demand on a natural gas source includes introducing natural gas into the natural gas storage facility, separating the natural gas into a heavy natural gas component and a light natural gas component, and retaining the components during a non-peak period of demand. The natural gas storage facility includes a guard bed system and an adsorption bed system. The method also includes releasing the heavy and light natural gas components, mixing them into a released natural gas component product and introducing it to the natural gas source during a peak period of demand.

An apparatus for surgical extraction of hair follicles for transplantation uses a rotating needle for cutting follicular units from a patient's scalp. Each follicular unit is drawn through the needle and transported through a diverter unit to a selected one of plural collectors, in which the follicular units are accumulated for transplantation. The rotating needle is extends through a seal compartment in which a seal, composed of a spring inside a spring carrier, engages both the needle and a cylindrical inner wall of the seal compartment.

Systems and methods for minimizing pressure fluctuations within a pumping apparatus are disclosed. Embodiments of the present invention may serve to reduce pressure variations within a fluid path of a pumping apparatus by avoiding closing a valve to create a closed or entrapped space in the fluid path and similarly, avoiding opening a valve between two entrapped spaces. More specifically, embodiments of the present invention may serve to operate a system of valves of the pumping apparatus according to a valve sequence configured to substantially minimize the time the fluid flow path through the pumping apparatus is closed (e.g. to an area external to the pumping apparatus).