457 results about "Circumferential rings" patented technology

An intravascular stent assembly for implantation in a body vessel, such as a coronary artery, includes undulating circumferential rings having peaks on the proximal end and valleys on the distal end. Adjacent rings are coupled together by links. The rings and links are arranged so that the stent has good conformability as it traverses through, or is deployed in, a tortuous body lumen. The stent is also configured such that the likelihood of peaks and valleys on adjacent rings which point directly at each other to overlap in tortuous body vessels is reduced.

An intravascular stent assembly for implantation in a body vessel, such as a coronary artery, includes undulating circumferential rings having peaks on the proximal end and valleys on the distal end. Adjacent rings are coupled together between peaks on one ring and valleys on the proximally adjacent ring. To increase flexibility of the stent, the links do not couple all of the peaks on a ring to the proximally adjacent ring.

An expandable stent is fabricated from a plurality of circumferential rings, each pair of adjacent circumferential rings being interconnected by a multiplicity of links, each link contacting a portion of a strut in one ring along one longitudinal axis and a portion a strut in a directly adjacent ring along a different longitudinal axis. Each link is circumferentially S-shaped and adjacent links are mirror images of each other. The resulting stent is both flexible and strong when expanded thereby providing good scaffolding. In one embodiment, the strut material is fabricated of shape memory alloy such that when the strut is compressed so as to be insertable into a vessel, the strut will automatically expand to its previous dimension upon rising to the temperature of the vessel in which it is placed, thereby to expand and hold open the vessel without need for a balloon catheter.

An anchorable cannula adapted for positioning within an opening formed in tissue includes a cannula body having a proximal portion and distal portion. The proximal portion and the distal portion are linked by a circumferential ring positioned therebetween. The proximal portion includes a series of foldable arms extending upwardly from the circumferential ring and ending at a circumferential seal ring formed at a free end of the proximal portion. The distal portion includes a series of foldable arms extending downwardly from the circumferential ring and ending at a circumferential seal ring formed at a free end of the distal portion.

An apparatus for slicing fruit or other items is provided. The apparatus includes a top interlocking blade, a middle interlocking blade, and a bottom interlocking blade, each having an apex and two downward sloping edges of approximate equal length. The blades have slots at each side that fit into slots in a circumferential ring. The blades form a cutting surface within the circumferential ring that allows a lime or other item to easily cut into equal-sized sections.

An endodontic instrument includes an elongated shaft having a tip and a portion capable of being inserted into the root canal of a tooth. The shaft further includes a plurality of depth markers which are perceivable in a radiograph for indicating the depth of the tip within the root canal. The markers may comprise bumps having a diameter greater than the diameter of the elongated shaft by an amount sufficient to distinguish the markers from the shaft on the radiograph. Alternately, or additionally, the markers may have a radiopacity different from the radiopacity of the shaft by an amount sufficient to distinguish the markers from the shaft on the radiograph. The shaft may be selectively coated with paints, dyes, and/or inks having radiopaque properties. The markers may take the form of circumferential rings or other indicia such as numerals, letters and/or geometrical shapes.

A non-pneumatic tire assembly includes a non-pneumatic tire. The non-pneumatic tire includes an inner circumferential ring and an outer circumferential ring defining an annular space and a cylindrical space inside the inner circumferential ring. A plurality of partitions connect the circumferential rings within the annular space. A ground-contacting tread is located on the outer circumferential ring. A rim, including a plurality of pieces, is located within the cylindrical space. The non-pneumatic tire assembly further includes a hub that is removably connected to the rim.

A hot-fillable blow molded plastic container having a finish with an opening; a base; a lower bumper transition; an upper bumper transition and a tubular dome. The upper bumper transition and lower bumper transition defines a label mounting region. The label mounting region includes a circumferential ring adjacent to the upper bumper transition a vacuum panel. The tubular dome can be between the upper bumper transition and the finish and can has a cross sectional shape that is substantially the same throughout. The tubular dome includes an upper bell and a lower bell separated by a peripheral waist that has a diameter less than that of the upper and lower bell.

A flow manipulating arrangement for a turbine exhaust diffuser includes a strut having a leading edge and a trailing edge, the strut disposed within the turbine exhaust diffuser. Also included is a plurality of rotatable guide vanes disposed in close proximity to the strut and configured to manipulate an exhaust flow, wherein the plurality of rotatable guide vanes is coaxially aligned and circumferentially arranged relative to each other. Further included is an actuator in operative communication with the plurality of rotatable guide vanes and configured to actuate an adjustment of the plurality of rotatable guide vanes. Yet further included is a circumferential ring operatively coupling the plurality of rotatable guide vanes, wherein the actuator is configured to directly actuate rotation of one of the rotatable guide vanes, and wherein the circumferential ring actuates rotation of the plurality of rotatable guide vanes upon rotational actuation by the actuator.

Embodiments of the present invention relate to concentrating solar radiation using an assembly of at least one clear and one reflective film that inflates into a shape reflecting parallel rays of light to a concentrated focus in the interior or immediate proximity of the assembly. Embodiments of the present invention can be assembled in a substantially flat stack with bonds or welds between the films, compatible with conventional high-throughput film manufacturing processes. Embodiments in accordance with the present invention may employ external circumferential rings or a “harness” assembly to support and point the balloon against wind forces and the like without severe stress localization. Embodiments in accordance with the present invention may also employ film attachments to facilitate feedthroughs, reduce stress concentrations, and modify the inflated shape. Embodiments in accordance with the present invention may also employ film modifiers, including laminated films, adhesives, printing, etc. to facilitate installation, feedthroughs, and other functions.

The invention provides an axial permanent magnet assisted radial reluctance high-speed motor with a hybrid cooling structure, and relates to the technical field of motors. The motor provided by the invention is provided with an air cooling and water cooling structure on the basis of a dual group 6/4-pole switched reluctance motor structure. The motor comprises a casing, a front end cover, a rear end cover, a rotor and a stator, and is characterized in that an inter-tooth slot of the stator and the rotor form a cooling air channel, each end cover is provided with air discharging holes, the casing is provided with a cooling air inlet, a cooling water inlet pipe opening, a cooling water outlet pipe opening and a circumferential ring-shaped air guiding channel, the back of a ring yoke of the stator is provided with a spiral water channel pipe, and two ends of the rotor are provided with self-cooling fans respectively. According to the invention, a cooling structure combining the air cooling stator and the water cooling stator is adopted, and a water cooling function and an air cooling function are opposite in direction and complementary in cooling region, so that the stator and the rotor of the motor are effectively enabled to be reduced in temperature, a problem of difficult heat dissipation of the motor under a high-speed operating condition is avoided, thus long-term safe and stable running of the motor is ensured, and the service life of the motor is effectively prolonged.

The present invention relates to a chromatography column 1 in which the net 129 and/or bed support 131 is integrally joined to a net retaining means, preferably a sleeve 135 that protrudes through the column end plate 5, and/or to a net retaining circumferential ring. Different net retaining means are also presented.

A dental implant system for securing a dental prosthesis within a prepared site of a jawbone in a subject having an implant configured for insertion within the prepared site of the jawbone and an abutment configured for secure attachment to the implant. The implant can have a shoulder portion having a plurality of circumferential rings and a body portion that can be threaded. The implant can have an internal cavity that is configured or otherwise adapted to receive at least a portion of the abutment.

A functional pressure hose for a water-carrying system, particularly for connecting movable sanitary fittings or for connecting parts of the water-carrying system with one another, has an inner hose made of plastic and an outer jacket made of a braided material. At least one hose end is provided with a connector piece having a tubular connector, onto which the hose end is pressed. The inner hose is formed by a corrugated hose, and the tubular connector has circumferential ring beads that are adapted to the inner contour of the corrugated hose. At least some of the ring beads are provided with notches that run axially. The hose demonstrates great flexibility while maintaining the required pressure strength, but at the same time guarantees great bending protection.

The present invention relates to a stent manufactured from a thin-walled tube of surgical implant quality. The stent comprises a plurality of main circumferential rings, a plurality of longitudinal links and a plurality of intermediate circumferential rings. The main circumferential rings are longitudinally spaced apart along a longitudinal axis. Circumferential gaps are formed between adjacent main circumferential rings. The longitudinal links span the gaps and are attached to adjacent main circumferential rings. The intermediate circumferential rings fill in the circumferential gaps and are attached to the longitudinal links. The present invention thereby provides a stent with adequate radial strength to properly deploy, adequate scaffolding affect to properly support vessel walls and increased longitudinal flexibility to easily maneuver through tortuous vessels.

The invention relates to a submarine pipe coating clearing device comprising a clamping mechanism, a rotating frame and high-pressure spray nozzles. The clamping mechanism is used for being clamped to the outer side of a submarine pipe and can move back and forth in the axial direction of the submarine pipe. The rotating frame is arranged on the clamping mechanism and can rotate back and forth around the outer ring of the submarine pipe. The high-pressure spray nozzles are arranged on the rotating frame and are opposite to the outer ring of the submarine pipe so that the high-pressure spray nozzles can conduct spray cutting on the coating on the outer wall face of the submarine pipe when rotating along with the rotating frame. The rotating frame of the submarine pipe coating clearing device can rotate around the outer ring of the submarine pipe, the high-pressure spray nozzles are connected with a high-pressure water pipe through a pipeline, and the high-pressure spray nozzles can conduct cutting clearing on the coating on the circumferential ring of the submarine pipe in the rotating process. Meanwhile, the high-pressure spray nozzles and the rotating frame can move in the axial direction of the submarine along with the clamping mechanism, and therefore omnibearing cutting clearing of the circumferential ring and the axial direction of the submarine pipe is achieved.

A method of forming a coating deposits a material onto a substrate with high velocity thermal spray apparatus. The method comprises the steps of mixing of an oxidizer gas and a gaseous fuel in the mixing unit, igniting and combusting the oxidizer and gaseous fuel mixture in the combustion chamber, feeding products of combustion to the accelerating nozzle, introducing selected spraying material into accelerating nozzle to form a supersonic stream of hot combustion product gases with entrained particles of spray material, and spraying at high velocity onto a surface positioned in the path of the stream at the discharge end of the nozzle; and forming a non-clogging convergent-divergent gas dynamic virtual nozzle (GDVN) in the accelerating nozzle by annularly introducing a coaxial gas flow, through a narrow continuous slot of circumferential ring geometry in the vicinity of the entrance to the diverging outlet bore of the accelerating nozzle.