57 results about "Orifice area" patented technology

A low pressure gradient prosthetic heart valve for implant in a human. The valve includes a support frame with undulating inflow cusps and outflow commissure posts to which flexible leaflets attach and coapt in a flow area. The commissure posts angle outward in a neutral state to widen the outflow orifice area. Also, the leaflets are designed to fit within the support frame and expand outward in a valve open state without creating a shelf or belly that would restrict flow.

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.

The invention discloses a laser lap welding gap detecting system and a laser lap welding gap detecting method based on molten pool image visual sensing. The detecting system is a visual sensing system and comprises a CMOS camera, a light filtering system, a secondary light source, an image capture card, a computer, a display and the like, wherein the CMOS camera has a LinLog photosensory technology. According to the detecting method, the secondary light source and emitted light of molten pools are used as light sources; plasma is filtered out by utilizing the light filtering system, and light intensity is adjusted; the computer is used for collecting and displaying molten pool images in real time, wherein the molten pool images are obtained by the CMOS camera; molten pool image edges and areas and orifice image edges and areas are extracted and calculated by utilizing a Labview image processing platform, and the quantitative relations between molten pool sizes and orifice areas and between the molten pool sizes and orifice gaps are obtained. The detecting system is simple in structure, clear in monitoring image, high in light signal detecting accuracy, strong in anti-jamming capacity, good in engineering practicability and capable of monitoring laser welding of T-type overlap joint gaps in real time.

A valve for flowing gaseous fuel, i.e., natural gas or propane gas, to an internal combustion engine includes a valve body having an inlet passage and first and second outlet paths in parallel with one another and in flow communication with the inlet passage. A plug-type adjustment member is threaded into the body and an annular seat in the body coacts with the adjustment member to form an orifice in the first outlet path. A stop mechanism limits movement of the adjustment member between a first position at which the orifice area is smaller and a second position at which the orifice area is larger. The valve permits adjustment of fuel flow to small engines so that such engines provide maximum power without exceeding applicable emission standards. And the valve is tamper-resistant.

A method of treating hair more precisely including providing a hair treatment composition in a foam dispenser, dispensing the hair treatment composition directly onto the hair as a foam, leaving the foam on the hair, and rinsing the foam from the hair. The foam dispenser includes a reservoir for holding the hair treatment composition, an extended nozzle connected to the reservoir, and one or more nozzle orifices. The one or more nozzle orifices has a total orifice area of from about 5 mm2 to about 80 mm2. The extended nozzle has a protrusion length of from about 20 mm to about 125 mm. The foam has a specific volume of from about 4 ml / g to about 20 ml / g.

The present invention relates to the technical field of reservoir description in oil field development, in particular to a fracture-cavity inter-well communication passage and flow parameter characterization method. The method comprises the following steps of: (A) establishing an analytical expression of describing a fracture-cavity reservoir inter-well flow rule; (B) establishing a tracing production concentration curve fitting mathematical model; (C) performing curve fitting model solution; and according to principles of the three steps, compiling fracture-cavity reservoir tracing curve fitting software, performing fitting on a theoretical tracing curve and an actually measured tracing curve by a method of adjusting a parameter on a software interface, and simultaneously carrying out calculation to obtain mass mik, a flow velocity vik, an orifice area Aik and a flow duct length lik of a fracture-cavity injection tracer so as to implement characterization on a communication passage and a flow parameter. According to the present invention, an established model of describing the flow rule of the fracture-cavity reservoir tracer further accords with the true situations; quantitative calculation characterization on the fracture-cavity reservoir inter-well communication passage and the flow parameter is implemented; and in the fitting process, automatic fitting of a computer and parameter regulation of a worker are combined.

A heat exchanger assembly having an inlet header, an outlet header spaced apart from and substantially parallel the inlet header, and a plurality of refrigerant tubes each extending between and in hydraulic communication with the inlet header and outlet header. Contained within the outlet header is a refrigerant collector conduit adapted to provide a predetermined pressure drop (ΔP) and having a cross-section area Acollector. The refrigerant collector includes a plurality of orifices having a cumulative orifice area (nAorifice) that are substantially equally spaced along the refrigerant collector. The collector conduit is in fluid communication with the outlet header for transferring the vapor phase of a two refrigerant. The collector conduit cross sectional area (Acollector) and cumulative orifice area (nAorifice) is described by the following equation:Δp=mdot2ρ[467.892(1Acollector2-1n2Aorifice2)+51.25192(δDorifice)(1nAorifice2)].

A device for detecting a deformation of a component, for example, in the automotive industry, having a deformable hollow body arrangement assigned as a deformation indicator to the component and having at least one orifice area, and at least one sensor device situated in the particular orifice area for measuring an air flow corresponding to the deformation of the hollow body arrangement. In addition, a method of detecting such a deformation of a component and activating an appropriate safety application is described. The measured data is analyzed by an analyzer unit after measurement of the deformation, and a suitable safety application optionally being activated if the measured data of the at least one sensor device indicates a deformation of hollow body arrangement and thus of the component.

A recoil pad for a shoulder firearm includes at least one piston member that is caused to move axially from an initial axial position to a second axial position upon application of the recoil force from the firearm. The axial movement of the piston member causes fluid movement within a column relative to a variable or fixed orifice area wherein the fluid movement causes resistance that absorbs the energy. A mechanical and / or hydraulic and / or elastomeric feature returns the piston to the initial axial position upon cessation of the applied recoiling force.

A heat pump heat exchanger includes a first manifold, a second manifold spaced from the first manifold, a plurality of refrigerant tubes hydraulically connecting the manifolds, and a distribution tube disposed in the first manifold. The distribution tube includes an inlet end, a distal end opposite the inlet end, a plurality of orifices between the inlet end and the distal end. The distribution tube also includes a terminal aperture immediately adjacent the distal end, wherein the terminal aperture includes an open aperture area greater than any one of the open orifice area. The open aperture area is large enough to provide a uniform refrigerant collection with acceptable minimal pressure drop in evaporative mode, but small enough to prevent vapor overflow to an area of the manifold adjacent to the distal end in condenser mode. The length of the distribution tube is less than 3 / 4 the length of the first manifold.

The invention discloses a digital hydraulic flow regulation system. A power oil source is connected with the oil inlet of an inlet and return oil reversing valve in a first digital control unit and the oil inlet of an inlet and return oil reversing valve in a second digital control unit. The return opening of the inlet and return oil reversing valve in the first digital control unit and the return opening of the inlet and return oil reversing valve in the second digital control unit are connected with an oil return tank. A rodless cavity of a hydraulic cylinder is connected with the working port of a pressure compensator in the first digital control unit. A rod cavity of the hydraulic cylinder is connected with the working port of a pressure compensator in the second digital control unit. A controller is electrically connected with the two digital control units. High-speed switching valves use PWM digital signals to control. An amplifier board and a digital-to-analogue conversion device are arranged between the controller and the high-speed switching valve. Orifice areas of the four high-speed switching valves are in two-time relations. Through combinational coding and inlet and return oil switching, a single digital control unit can realize adjustable flow of -15Q-15Q.

The invention provides a double-diameter spring type heat transfer pipe insert orifice fixing device, which comprises a double-diameter spring, a spring seat, a rotating shaft, an axial bearing and a locking nut. The double-diameter spring type heat transfer insert orifice fixing device occupies a small orifice area, can be arranged at orifices of two ends simultaneously, and overcomes the shortcoming that the other like devices cause high resistance to fluids due to large occupied orifice areas and only can be arranged at the orifice of one end and easy to drop so as to be widely applicable to various vertical and horizontal shell-and-tube heat exchangers.

A flow stabilizing valve is composed of valve body with left jointer, valve core in the axial hole of valve body and having a central through hole and two radial through holes at its both ends, spring sleeving on small end of valve core, spring holder at right end of valve body, and a throttle valve installed at left end of said central through hole on valve core. On the valve body, there is an outlet A with stabilized flow and another outlet B for excessive flow. When load is changed, the orifice area of said radial through holes on valve core can be automatically changed for pressure compensation, stabilizing the output flow.

A recoil pad for a shoulder firearm includes at least one piston member that is caused to move axially from an initial axial position to a second axial position upon application of the recoil force from the firearm. The axial movement of the piston member causes fluid movement within a column relative to a variable or fixed orifice area wherein the fluid movement causes resistance that absorbs the energy. A mechanical and / or hydraulic and / or elastomeric feature returns the piston to the initial axial position upon cessation of the applied recoiling force.

A heat pump heat exchanger includes a first manifold, a second manifold spaced from the first manifold, a plurality of refrigerant tubes hydraulically connecting the manifolds, and a distribution tube disposed in the first manifold. The distribution tube includes an inlet end, a distal end opposite the inlet end, a plurality of orifices between the inlet end and the distal end. The distribution tube also includes a terminal aperture immediately adjacent the distal end, wherein the terminal aperture includes an open aperture area greater than any one of the open orifice area. The open aperture area is large enough to provide a uniform refrigerant collection with acceptable minimal pressure drop in evaporative mode, but small enough to prevent vapor overflow to an area of the manifold adjacent to the distal end in condenser mode. The length of the distribution tube is less than ¾ the length of the first manifold.

The invention discloses an improved anti-backflow high-pressure pipe fitting. The improved anti-backflow high-pressure pipe fitting comprises a pipe fitting body. The improved anti-backflow high-pressure pipe fitting is characterized in that a ring-shaped structure is arranged at the input end of the pipe fitting body, a circular arc design is adopted for the side, right facing the input end, of the ring-shaped structure, and the orifice area of the ring-shaped structure is reduced gradually; a baffle is arranged on the side, opposite to the input end, of the ring-shaped structure, and the upper end of the baffle is fixed to the ring-shaped structure through a hinge; and a spring device capable of extending and contracting in the up-down direction is arranged between the baffle and the inner wall of the pipe fitting body, and the non-telescoping length of the spring device is larger than the thickness of the portion, from the hinge to the portion above the hinge, of the inner wall of the pipe fitting body. The improved anti-backflow high-pressure pipe fitting has the beneficial effects that the baffle is arranged through the hinge, the baffle can fall back under the effect of the gravity and the reverse backflow force after the impact force is lost, the baffle is tightly attached to the ring-shaped structure, and fluid backflow is prevented; and the spring device is arranged between the baffle and the inner wall, and when the fluid impact force is lost, the spring force, the baffle deadweight and the backflow force jointly act on the baffle, closing of the baffle is accelerated and the baffle can be closed quickly.

The invention discloses a vacuum suction machine for garbage disposal. The vacuum suction machine comprises a storage bin, a bottom plate is arranged on the lower portion of the storage bin, a vertical air and matter separation screen is arranged in the storage bin which is divided into an air suction pipe orifice area and a matter suction pipe orifice area by the air and matter separation screen, an air suction port is arranged in the bottom plate of the air suction pipe orifice area, a centrifugal fan is arranged nearby the storage bin, an air suction pipe is arranged at an inlet of the centrifugal fan to be connected with an air suction pipe outlet, and an exhaust pipe is arranged at an outlet of the centrifugal fan. A matter inlet is arranged on the upper end side wall of the matter suction pipe orifice area and connected with a matter suction barrel, and the lower end of the suction barrel is arranged on the upper end surface of a matter conveying belt. A seal door is arranged on the side wall of the matter suction pipe orifice area. According to the vacuum suction machine, impurities such as plastic and paper in separated organic matters are subjected to secondary effective separation through a vacuum suction principle, and convenience is brought for further disposal of organic matters.

Internal combustion engine 1 comprising at least one cylinder 2 and a piston 3 supported for repeated reciprocal movement in the cylinder 2 so as to define a combustion chamber 21 of an engine bore diameter A-A, the internal combustion engine 1 further comprising an ignition device 4 arranged in said cylinder 2 having an igniter portion 42 and an fuel injector 43 which are both arranged in a pre-chamber 41, wherein the pre-chamber 41 comprises a plurality of orifices 44 for providing fluid communication between said pre-chamber 41 and the combustion chamber 21, and wherein the plurality of orifices 44 are of an overall orifice area so that the ratio between the overall orifice area and the engine bore diameter A-A ranges from 0.01 mm to 0.2 mm.

A channel plate adapter 24 is provided for an open-end spinning arrangement 1 having a spinning rotor 3 which turns at a high number of revolutions inside a rotor housing 2 chargable with an underpressure. The channel plate adapter 24 is made of a plastic material, defines the orifice area of a fiber guide conduit and a center through-bore 26 for a yarn withdrawal nozzle 27, and is adapted to be exchangeably arranged in a receiver 22 of a fiber channel plate 10 for closing the rotor housing during a spinning operation. The channel plate adapter (24) has a unitary one-piece clip-on closure (37) at inlet area of the through-bore (26) for centering and fixing the yarn withdrawal nozzle (27) in place.

The invention relates to a package (1) containing water-soluble film pouches (3) filled with liquid washing or cleaning agent (2), wherein the water-soluble film pouches (3) are entirely or in part formed from PVA copolymers and the water-soluble film pouch (3) and / or the washing and cleaning agent preparation contains a source of at least one amine compound, at least one scent emission source (4) which releases scents with a boiling point of >70° C. is arranged within the package, at least one ventilation orifice (5) is provided in the package (1), which ventilation orifice has, in magnitude terms, a ventilation orifice area / boiling point ratio relative to amine compounds of between 0.8 and 50 mm2 / ° C., preferably between 1 and 20 mm3 / ° C., more preferably between 1.1 and 10 mm2 / ° C.

A low pressure gradient prosthetic heart valve for implant in a human. The valve includes a support frame with undulating inflow cusps and outflow commissure posts to which flexible leaflets attach and coapt in a flow area. The commissure posts angle outward in a neutral state to widen the outflow orifice area. Also, the leaflets are designed to fit within the support frame and expand outward in a valve open state without creating a shelf or belly that would restrict flow.

An anchor-pile-structured solar system fully utilizing lighting surface and a ceramic solar panel thereof relate to composition, material, structure and construction process of an anchor-pile-structured ceramic solar roof, an anchor-pile-structured ceramic solar system, and a ceramic solar panel. The seamless anchor-pile-structured solar thermal system uses the ceramic solar panels with each having orifices including an upper convex orifice and a lower concave orifice on a set of opposite corners, or uses the ceramic solar panels with each having convex orifices on a set of opposite corners and concave orifices on the other set of opposite corners. Only one anchor-pile piece is disposed below each piece of ceramic solar panel except for the lowermost ceramic solar panel. The anchor-pile pieces are disposed on the concave orifice area and in the spaces between the orifices and the sidewalls.

Embodiments relate to systems and methods for magnetized stent having growth-promoting properties. A stent assembly comprising a tubular elongated body having a magnetized region and a tissue nidus area is inserted beneath the orifice of a vascular aneurysm. The magnetic region can serve to attract and position both residual red blood cells and magnetically nano-ireated growth-promoting cells to the orifice area of the aneurysm. The outer circumference of the tubular elongated body can act as a floor or scaffold for regenerated smooth vascular muscle cells. In embodiments, the tissue nidus area can be provided on the exterior stent, while the magnetized region is provided on the interior stent, of a stent-in-stent structure. In embodiments, the exterior stent is made of biodegradable material which gradually dissolves or dissipates in situ.

A bed of particulate material 6 is supported by an air distribution bottom 5. Under the distribution bottom 5 exist one or more compartments 7, which each being supplied with cooling air from a fan installation 8. The distribution bottom 5 is sectionalised in a number of smaller areas 9. Each smaller distribution area 9 is connected to the compartment 7 by ducts 10, 11 and 12. The one duct 10 does have a fixed orifice area. The ducts 11 and 12 do have floaters 13A / 13B end stop 14A / 14B and bottom support 15A / 15B. It is hereby obtained that the total pressure loss across the air distribution bottom can be reduced, and so that the flow of the treatment air through the material bed is distributed in a desirable manner across the entire air distribution bottom regardless of the composition of the material bed and the distribution thereon, and optimal heat exchange efficiency is obtained.

The invention discloses a float refrigerant expansion device comprising a float chamber body, a vertical pipe fitting, a float component and a separation component. The float chamber is connected with a bottom plate and a tubular outer casing, and the bottom plate is provided with a first pipe orifice relative to the upper end of the tubular outer casing and comprises a first through hole and a plurality of second through holes. The vertical pipe fitting is fixed on the bottom plate and comprises a second pipe orifice and a third pipe orifice, the second pipe orifice is communicated with the first through hole, and the second through holes on the bottom plate are positioned at the outside of the junction of the vertical pipe fitting and the bottom plate. At least one opening is formed on the pipe wall of the vertical pipe fitting which is adjacent to the side of the second pipe orifice. The float component is sleeved on the vertical pipe fitting for controlling the orifice area of the opening. The separation component is arranged on the bottom plate along the periphery of the float component, thereby constituting an inner flow channel with the tubular outer casing. A plurality of fluid through holes are formed on the separation component which is adjacent to the bottom plate.

The invention discloses a device used for restraining self-excited oscillation of a servo valve and capable of adjusting an orifice area. The device comprises a valve seat, a slide valve adaptive to the valve seat, a valve seat oil return hole and a throttling device arranged in the valve seat oil return hole, wherein an inlet of the valve seat oil return hole is formed corresponding to a nozzle flapper jet region; the throttling device comprises a cone valve element in threaded connection with the inner wall of the valve seat oil return hole, and a cone valve seat in threaded connection with the valve seat oil return hole; when the top end of a cone of the cone valve element is not intersected with the end face of the cone valve seat, the through-flow between the cone valve element and the cone valve seat is maximum; a through-flow area between the cone valve element and the cone valve seat is gradually reduced along with the cone of the cone valve element entering a first through-flow hole of the cone valve seat. According to the device provided by the invention, through changing the distance between the cone valve element and the cone valve seat, a throttling area and the oil return backpressure are changed, cavitation of the jet region is reduced, and the self-excited oscillation of the servo valve is restrained.