60results about How to "Constant cross-sectional area" patented technology

A transparent illuminated infusion cannula is provided for illuminating an area during eye surgery. An optical fiber may be spaced a certain distance away from the cannula such that fluid flow around the distal end of the fiber and into the transparent cannula may occur with a much higher flow rate than what had previously been possible. The fiber cannula airspace may be optimized so that the cross-sectional area of the fluid conduit remains substantially constant in order to achieve a best compromise between high light transmittance and high fluid flow rate.

Apparatus for multiplying layers in a composite polymer stream includes an intermediate section having open conduits sandwiched between housing sections that close the conduits. The conduits have respective first stages separated by a first blade extending to a first face, and respective second stages separated by a second blade extending to a second face. The first stages separate the stream into sub-streams and compress and shift the sub-streams in a first dimension, whereas the second stages shift the sub-streams in a second dimension. In order to maintain a constant cross-sectional area of the sub-streams, the housing sections may be provided with complementary open channels. The apparatus can be used to multiply layers which are side-by-side or one-over-another by changing orientation in the direction of flow.

The invention relates to a direct shear test data acquisition instrument for a big visual model of reinforced earth. The direct shear test data acquisition instrument comprises a vertical loading system, a horizontal loading system and a shear box, wherein the shear box comprises an upper shear box and a lower shear box which are both filled with packing; the horizontal loading system comprises a push-pull electromotor and a sliding balanced pushing rod, and a displacement sensor and a pressure sensor are mounted on the push-pull electromotor; one end of the sliding balanced pushing rod is connected with the push-pull electromotor, and the other end of the sliding balanced pushing rod is connected with the lower shear box; a counterforce device is mounted on one side, far away from the sliding balanced pushing rod, of the lower shear box and connected with the upper shear box; transparent tempered glass is arranged on one side wall of the upper shear box in the shear direction, and a digital video camera is mounted in front of the tempered glass; a geotechnical material spring clip is mounted at one end of the lower shear box. The direct shear test data acquisition instrument is convenient to use, small in test error, precise test data and convenient to widely promote and use.

Diecasting machine for production of mouldings from thixotropic metal billets, containing a sprue system which connects a cylindrical casting chamber cavity with a moulding cavity, where the sprue system has a cylindrical sprue cavity immediately adjacent to the casting chamber cavity and contains at least one sprue, and all sprues lead laterally away from the generated surface of the sprue cavity and each sprue has a concentric center line and at its end facing towards the moulding cavity has an inlet opening for introduction of the thixotropic metal alloy into the moulding cavity, and the sprue system is connected to the casting chamber cavity by a passage opening perpendicular in relation to a concentric longitudinal axis of the cylindrical casting chamber cavity, wherein each sprue has a circular or elliptical cross section with a substantially constant cross sectional area over its entire length.

Apparatus, system, and methods for introducing a sharp tip of a transseptal guidewire through a hub of a transseptal needle and into a lumen of a transseptal needle are provided. The apparatus includes a holder that contains the transseptal guidewire and a shield coupled to the holder. The shield has a wall defining a lumen that accommodates the sharp tip of the transseptal guidewire. The cross-sectional shape of the wall is substantially constant along at least a portion of its length and sized to fit within the lumen of the transseptal needle, thereby inhibiting contact between the sharp tip of the transseptal guidewire and the hub of the transseptal needle when the wall of the shield is positioned to extend into the lumen of the transseptal needle. The lumen of the shield has a substantially constant cross-sectional area along at least a portion of its length and an outer surface of the wall of the shield is cylindrical along the same length.

Typically a limb for an archery bow has a butt section or end attachable to a bow riser, a middle or hinge section and an opposing tip section or end. In a preferred embodiment, the present method and limb includes a rib section formed in the middle or hinge portion of the limb. This allows a narrowed front-profile to be presented in the hinge section, while maintaining the total cross-sectional area. In one preferred method, at least one half of a mold is formed to define a rib section in the hinge section of the limb. Preferably the rib section runs longitudinally along the length of the hinge section, and may include a tapered profile along the edges and ends of the rib. In another preferred embodiment, the limb, including a rib section, is curved prior to assembly into an archery bow.

An apparatus for removing material from a liquid flowing through a channel includes a sieve grate, a screw conveyor and a detaching device. The sieve grate has an inflow side, an inner side and an outer side. The sieve grate is designed to be cylindrical and to be rotatably driven. The sieve grate is arranged at an inclined orientation to be partially submerged in the liquid. The sieve grate at the inflow side includes an open face. The sieve grate at the inner side includes a plurality of guide plates. The sieve grate includes a shaping carrier element. The sieve grate includes a mesh fabric, the mesh fabric being designed and arranged to form a separation surface for the material. The screw conveyor includes a housing. The screw conveyor includes a driven conveying screw. The screw conveyor is coaxially arranged with respect to the sieve grate. The screw conveyor in the region of the sieve grate includes a feeding hopper for the material, the feeding hopper having a bottom side and including a majority of openings located in the region of the bottom side. The detaching device is arranged at the outer side of the sieve grate and above the feeding hopper in a stationary way. The detaching device is designed and arranged to detach material which adheres to the separation surface from inside of the sieve grate.

A hatless rotor for an automotive disk brake system, wherein the following improvements are realized over known disk brake systems: reduced braking noise, improved air cooling, decoupling of wheel to rotor cross-talk, reduced brake pulsation, reduced mass, reduced rotor cheeks temperature during braking, and better air movement access for improved cooling of the rotor cheeks. The hatless rotor includes a first rotor cheek, a second rotor cheek and a central disk, wherein the first and second rotor cheeks are spaced from, and mutually interconnected to, the central disk by first and second sets of vanes, staggered relative to each other, and configured to provide optimal air circulation. The central rotor disk is connected directly to the motor vehicle axle hub via a suitable rotor hub connected thereto.

A tension member for an elevator system has an aspect ratio of greater than one, where aspect ratio is defined as the ratio of tension member width w to thickness t (w/t). The increase in aspect ratio results in a reduction in the maximum rope pressure and an increased flexibility as compared to conventional elevator ropes. As a result, smaller sheaves may be used with this type of tension member. In a particular embodiment, the tension member includes a plurality of individual load carrying cords encased within a common layer of coating. The coating layer separates the individual cords and defines an engagement surface for engaging a traction sheave.

The invention discloses a cigarette unpunching/punching missing detection device, a laser punching machine and a cigarette unpunching/punching missing detection method, and belongs to the technical field of cigarette equipment. The cigarette unpunching/punching missing detection device comprises two fixing blocks and a detection drum arranged between the two fixing blocks; the detection drum is adetection drum of a cigarette making machine; flanges are arranged at the two ends of the axial direction of the detection drum; a plurality of vent holes are circumferentially formed in the flanges at intervals; gas guiding grooves and gas holes communicated with the gas guiding grooves are formed in the fixing blocks; the gas guiding grooves are arc-shaped grooves with convex arcs at one ends and concave arcs at the other ends; the lengths of the gas guiding grooves are equal to integral multiples of the distance between adjacent vent holes in the circumferential direction of the detection drum. A cigarette unpunching/punching missing detection method is achieved by the cigarette unpunching/punching missing detection device. The invention discloses the cigarette unpunching/punching missing detection device, the laser punching machine and the cigarette unpunching/punching missing detection method.

Fragrance control is provided by articles of manufacture including various solid state fragrancing objects, methods of using such objects, and systems that employ one or more such objects. The fragrancing object can be easy to manufacture, long lasting, provide fragrance that is consistently released over time, provide an indication to the user that the object needs to be replaced, and can hold a desired ratio of fragrance. The solid state fragrancing object can be coupled to an air vent to inconspicuously provide fragrance to a user in an environment, such as the interior of a vehicle.

Systems and methods described herein utilize an ion guide for use in mass spectrometer systems, which ion guide can receive ions from an ion source for transmission to downstream mass analyzers, while preventing debris (e.g., unsolvated droplets, neutral molecules, heavy charged clusters) from being transmitted into a high-vacuum chamber of the mass spectrometer system. In various aspects, systems and methods in accordance with the present teachings can increase throughput, improve the robustness of the system, and/or decrease the downtime typically required to disassemble/clean sensitive components within the high-vacuum portions of the mass spectrometer system.

A tension member for an elevator system has an aspect ratio of greater than one, where aspect ratio is defined as the ratio of tension member width w to thickness t (w/t). The increase in aspect ratio results in a reduction in the maximum rope pressure and an increased flexibility as compared to conventional elevator ropes. As a result, smaller sheaves may be used with this type of tension member. In a particular embodiment, the tension member includes a plurality of individual load carrying cords encased within a common layer of coating. The coating layer separates the individual cords and defines an engagement surface for engaging a traction sheave.

The invention relates to a drilling tool filter screen for realizing protection of the internal wall of a drilling tool. The drilling tool filter screen is arranged at the upper part of a small end of the internal thread of the drilling tool and an opening thereof faces downward; the drilling tool filter screen adopts a mode that drilling fluid flows into an inner cavity of the filter screen by filter holes on the filter screen from the outer part of the filter screen to filter impurities. The drilling tool filter screen for protecting the internal wall of the drilling tool guarantees that the impurities in the drilling fluid are filtered, simultaneously can protect the internal wall of the drilling tool effectively, reduce drilling tool accidents caused by washing out and abrasion of the drilling fluid to the internal wall of the drilling tool, prolong the service life of the drilling tool and can be widely applied to fields of drilling operation of petroleum gas.

A filter for removing ferrous particles from a fluid. The filter has an outer filter housing and a non-ferrous liner inside the housing. A plurality of magnets are longitudinally extended at intervals outside the liner. An insert inside the liner imparting a directional flow to the fluid inside the filter whereby ferrous particles in the fluid are trapped by the magnets and held against the non-ferrous line.

A filter for removing ferrous particles from a fluid. The filter has an outer filter housing and a non-ferrous liner inside the housing. A plurality of magnets are longitudinally extended at intervals outside the liner. An insert inside the liner imparting a directional flow to the fluid inside the filter whereby ferrous particles in the fluid are trapped by the magnets and held against the non-ferrous line.