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226results about How to "Improve radial stiffness" patented technology

Axial force null position magnetic bearing and rotary blood pumps which use them

A generally cylindrical rotor very closely confined between two rigid thrust bearing surfaces is radially suspended by an array of attracting or repelling magnets or by a combination of permanent magnets and ring shaped members composed of ferromagnetic material. The geometry permits very small spacing between magnetic components to achieve high radial stiffness. High magnetic axial forces exerted between the rotor and stationary component on one end of the rotor are counter-balanced by equal and opposite forces at the other end of the rotor. Precise positioning of the rotor in the location where the opposing axial magnetic forces counterballance each other yields a net magnetic axial force on the rotor of near zero, hence the reference to this as the null position. Wear resistant mechanical thrust bearings confine the rotor axially to maintain this position during rotatioin. Precisely balance the magnetic axial forces in the proper geometry with relation to the mechanical thrust bearings. Blood pumps utilizing this type of bearing are disclosed, including both axial flow pump and centrifugal flow pump configurations with high flow washing of the junction of the rotating and stationary parts to prevent thrombus accumulation.
Owner:JARVIK ROBERT

Reinforced inflatable medical devices

ActiveUS20150272732A1Increased longitudinal stiffnessProvide stability and stiffnessStentsBalloon catheterFluteEngineering
An inflatable structure for use in biological lumens and methods of making and using the same are disclosed. The structure can have an inflatable balloon formed into a plurality of cells encircled by a shell. A strap can extend between the cells. The shell can have proximal and distal tapered necks, longitudinally-oriented flutes, and apertures at the proximal and distal ends of the shell. The shell can include a reinforcement having tapered sections over the necks and strips extending between the tapered sections. A semi-compliant or compliant balloon can be placed around the outside of the inflatable structure.
Owner:LOMA VISTA MEDICAL

Tubular baseball bats with variable stiffened barrels

Tubular baseball bats comprised of an elongated handle portion and a striking or barrel portion wherein the barrel portion has variable stiffness along its length. One such bat has a circumferential low cost, low weight stiffener generally located in the sweetspot area designed to increase radial stiffness in a controlled manner which results in decreasing the bat performance to meet a changed bat performance standard and can be applied at low cost to both used field returned bats and bats being newly manufactured. Further, new tubular polymer composite bats can be designed with increased radial stiffness generally located in the sweetspot area or with radial stiffness graduated from highest, generally in the sweetspot area, to lowest at the barrel ends. All bats of the present invention result in calculated bat performance to meet applicable regulatory standards while also increasing the sweetspot size.
Owner:CE COMPOSITES BASEBALL

Methods for Increasing a Retention Force Between a Polymeric Scaffold and a Delivery Balloon

ActiveUS20120261858A1Increase retention forceReduce diameterStentsSurgeryPolymeric scaffoldMedical treatment
A medical device-includes a scaffold crimped to a catheter having an expansion balloon. The scaffold is crimped to the balloon by a process that includes inflating the delivery balloon during a diameter reduction to improve scaffold retention and maintaining an inflated balloon during the diameter reduction and prior and subsequent dwell periods.
Owner:ABBOTT CARDIOVASCULAR

Methods and apparatus for stent having an expandable web structure

InactiveUS20050004659A1Reduced foreshorteningShorten the lengthStentsSurgeryWeb structureInsertion stent
The present invention provides a stent comprising a tubular flexible body having a wall with a web structure that is expandable from a contracted delivery configuration to deployed configuration. The web structure comprises a plurality of neighboring web patterns, where each web patterns is composed of adjoining webs, and the web patterns are interconnected by connection elements. Each adjoining web comprises a central section interposed between two lateral sections to form concave or convex configurations.
Owner:ABBOTT LAB VASCULAR ENTERPRISE

Stent improvements

InactiveUS20050240278A1Increases patient comfortIncrease flexibilityWound drainsSurgeryLumen DiameterInsertion stent
In accordance with the invention, there are provided medical devices for providing a fluid passage between two areas in the body. An embodiment of the present invention relates to a stent comprising a tubular member at least a portion of which comprises a reinforcement structure. The tubular member includes a wall and an axial lumen therein having a lumen surface. The reinforcement structure extends at least a portion of a length of the body portion adjacent the distal end portion. One advantage of this embodiment of the invention is, for example, that the reinforcement structure increases patient comfort by providing enhanced flexibility. A second advantage of this embodiment of the invention is, for example, that the reinforcement structure improves axial stiffness and radial stiffness allowing for a thinner tubular member wall thickness and larger lumen diameter.
Owner:ACMI CORP

Methods and apparatus for a drug-coated stent having an expandable web structure

InactiveUS20050004662A1Reduced foreshorteningShorten the lengthStentsSurgeryWeb structureDrug-Coated Stents
The present invention provides a drug-coated stent comprising a tubular flexible body having a wall with a web structure that is expandable from a contracted delivery configuration to deployed configuration. The web structure comprises a plurality of neighboring web patterns, where each web patterns is composed of adjoining webs, and the web patterns are interconnected by transition sections. Each adjoining web comprises a central section interposed between two lateral sections to form concave or convex configurations.
Owner:ABBOTT LAB VASCULAR ENTERPRISE

Linear compressor of plate spring supporting system adopting two different types of lines

The invention discloses a linear compressor of a plate spring supporting system adopting two different types of lines. The main assemblies thereof comprise four parts which are respectively a compressor assembly, a linear motor assembly, a piston assembly and a supporting system assembly. The compressor comprises a stand, a compressor shell, a compressor cylinder, an exhaust hole and a suction hole; the linear motor assembly comprises an inner yoke iron, an outer yoke iron, a permanent magnet, an anti-collision gasket, a coil framework and a coil on the upper surface thereof; a piston comprises a main piston shaft and a piston head; and a supporting system comprises two groups of plate spring groups with different types of line structures and a connecting frame. The structure has the characteristics that a spiral type plate spring supporting piston shaft assembly is adopted at one end with lighter mass of the piston head, and a spiral arm plate spring supporting piston head adopted at the end of the piston head moves in the cylinder to ensure clearance sealing; a linear arm plate spring is adopted at the rear end of the piston assembly to supply better support for the movement of the end with larger mass, the quantity of plate springs is reduced, and the volume of the compressor is saved.
Owner:ZHEJIANG UNIV

Methods and apparatus for a stent having an expandable web structure and delivery system

InactiveUS20050004650A1Reduced foreshorteningShorten the lengthStentsSurgeryWeb structureInsertion stent
The present invention provides a stent comprising a tubular flexible body having a wall with a web structure that is expandable from a contracted delivery configuration to deployed configuration. The web structure comprises a plurality of neighboring web patterns, where each web patterns is composed of adjoining webs, and the web patterns are interconnected by transition sections. Each adjoining web comprises a central section interposed between two lateral sections to form concave or convex configurations. A delivery system for the stent is also provided.
Owner:ABBOTT LAB VASCULAR ENTERPRISE

Methods and apparatus for a drug-coated stent having an expandable web structure

InactiveUS20050004658A1Reduced foreshorteningShorten the lengthStentsSurgeryWeb structureDrug-Coated Stents
The present invention provides a drug-coated stent comprising a tubular flexible body having a wall with a web structure that is expandable from a contracted delivery configuration to deployed configuration. The web structure comprises a plurality of neighboring web patterns, where each web patterns is composed of adjoining webs, and the web patterns are interconnected by connection elements. Each adjoining web comprises a central section interposed between two lateral sections to form concave or convex configurations.
Owner:ABBOTT LAB VASCULAR ENTERPRISE

Spindle and flexible hinge used in ultrasonic machine

A spindle used in an ultrasonic machine for transmitting vibration to a working tool of the ultrasonic machine is disclosed. The spindle includes a main body, a rotor disposed in the main body, an elastic clamping unit disposed in the rotor, a vibrating unit having one end thereof connected to the inner wall of the rotor while the other end connected to the elastic clamping unit, and a pre-pressure unit penetrating the rotor and one end thereof connected to the elastic clamping unit to provide the elastic clamping unit with rigidity against the rotor, thereby making the elastic clamping unit provide pre-pressure to the vibrating unit which further provides the elastic clamping unit with vibration against the rotor. The present invention further provides a flexible hinge for the spindle.
Owner:IND TECH RES INST

Methods and apparatus for a stent having an expandable web structure and delivery system

InactiveUS20050004651A1Reduce foreshorteningReduced foreshorteningStentsSurgeryBiomedical engineeringMechanical engineering
The present invention provides a stent comprising a tubular flexible body having a wall with a web structure that is expandable from a contracted delivery configuration to deployed configuration. The web structure comprises a plurality of neighboring web patterns, where each web patterns is composed of adjoining webs, and the web patterns are interconnected by connection elements. Each adjoining web comprises a central section interposed between two lateral sections to form concave or convex configurations. A delivery system for the stent is also provided.
Owner:ABBOTT LAB VASCULAR ENTERPRISE

Inertial voice type coil actuator systems

The present invention includes a variety of magnetic circuit arrangements functioning as acoustic drivers. The circuits include a coil former around which is wrapped a conductive coil and a magnetic gap in which the former is at least partially positioned. Further, an output disk is associated with the former to transfer sound to a substrate. Specifically, each embodiment includes a multi-component suspension system comprising various ways to associate at least one spider suspension with the coil former and integrated mounting apparatus variations that include infrastructure brackets allowing for position adjustments and compensation for torque forces on the bracket.
Owner:REVOLUTION ACOUSTICS

Methods and apparatus for a stent having an expandable web structure

InactiveUS20050004655A2Reduced foreshorteningShorten the lengthStentsSurgeryReticular formationWeb structure
Abstract of the Disclosure The present invention provides a stent comprising a tubular flexible body having a wall with a web structure that is expandable from a contracted delivery configuration to deployed configuration. The web structure comprises a plurality of neighboring web patterns, where each web patterns is composed of adjoining webs, and the web patterns are interconnected. Each adjoining web comprises a central section interposed between two lateral sections to form concave or convex configurations.
Owner:ABBOTT LAB VASCULAR ENTERPRISE

Single Fastener Strut Top Mount and Method of Optimizing Same

InactiveUS20080197552A1Improve isolationFavorable damper reactionResilient suspensionsVehicle springsEngineeringTower
A strut top mount is optimized to provide a resilient response to jounce and rebound load rates that is symmetrical and linear over a predetermined range of travel. An annular tower is formed of the body structure. A central bracket has adhered thereto an outer resilient element that abuts the tower, and has adhered oppositely thereto an inner resilient element. A bearing is supported by the central bracket, and a spring seat is supported by the bearing. A sleeve is received by a strut shaft and adhered to the inner resilient element A lower washer abuts a lower end of the inner resilient element. An upper washer abuts an upper end of the inner resilient element. A retention washer is mounted onto the strut shaft, wherein a periphery thereof has a retention washer resilient element. The components are collectively tuned to provide the optimization.
Owner:GM GLOBAL TECH OPERATIONS LLC

Double-reed large-turning angle flexible joint

The invention discloses a double-reed large-turning angle flexible joint, relates to the technical field of mechanical kinematic pairs, and solves the problem that the conventional flexible hinge is small in motion range. The double-reed large-turning angle flexible joint is characterized in that a first shell is integrally formed by a 210-degree arc plate and a 90-degree arc plate; the side wall of the 210-degree arc plate and the side wall of the 90-degree arc plate are integrally connected, and the thickness of the 90-degree arc plate is smaller than that of the 210-degree arc plate; the 210-degree arc plate of the first shell is arranged outside a 90-degree arc plate of a second shell, the 90-degree arc plate of the first shell is arranged inside a 210-degree arc plate of the second shell, and a gap is formed between the first shell and the second shell; a first flexible plate is inserted into the first shell and the second shell through a first through groove and a second through groove; a second flexible plate is inserted into the first shell and the second shell through the remaining parts of the first through groove and the second through groove. The double-reed large-turning angle flexible joint is applied to the field of large-stroke precision transmission mechanisms and flexible transmission.
Owner:HARBIN INST OF TECH

Rubber-plastic composite bush

ActiveCN101178106AOvercoming "stackingOvercome "stacking"Bearing componentsRubber-like material springsPolyoxymethyleneHeavy load
The invention provides a rubber plastic composite liner, belonging to a damping part or a sliding bearing used for connecting automobile parts. A rubber sleeve 1 is fixed on the an external cylindrical surface of the steel sleeve 2; an internal hole of the steel sleeve 2 is fixed with a plastic liner 5; the external cylindrical surface at the middle part of the rubber sleeve 1 is provided with at least a cirque concave trough 6; two ends of the rubber sleeve 1 are provided with conical chamfers 7. The invention is beneficial for fitting interference and variable rigidity design, overcomes the piling of the rubber layers of the liner, the axial contraction and press mounting not in place, misalignment, obliquity and abrasion offset of the liner, etc. The plastic liner 5 adopts the material of oil contained nylon or polyoxymethylene, can be suitable for heavy load working condition, and has the advantages of small abrasion, light weight, corrosion resistance, simple manufacture, small friction coefficient, stable performance, good sealing performance, and implementing the maintenance-free performance.
Owner:DONGFENG MOTOR CORP HUBEI

Spherical hinge rubber elastic element rigidity changing method, and rubber elastic element and manufacturing method thereof

ActiveCN101852263AImprove radial stiffnessRealize the effect of sudden change in stiffnessSpringsNon-rotating vibration suppressionElastomerRubber material
The invention discloses a spherical hinge rubber elastic element rigidity changing method, and a rubber elastic element and a manufacturing method thereof. Partial rubber materials are removed symmetrically, and different rigidity is provided through the size of the contact surface and the rubber deformation restriction degree at different stress stages to realize rigidity change. The symmetrical removal of the partial rubber materials is that: 3 to 5 circular spaces are dug on the surface of a rubber elastomer along the periphery, so that after the rubber elastomer is combined with an outer metal sleeve, the outer metal sleeve and the rubber elastomer are partially contacted under the no-load condition and are positioned in a 3-5 circular air isolation area, and spaces for the rubber to protrude at two ends are very small; meanwhile, after the rubber elastomer is combined with the outer metal sleeve, an annular gap zone is reserved between the rubber elastomer and the inner lateral surface of the outer metal sleeve. When the spherical hinge rubber elastic element is stressed, the spherical hinge rubber elastic element rigidity change is realized by changing an excircle contact surface and a lateral contact surface between the rubber elastomer and the outer metal sleeve at different stages.
Owner:ZHUZHOU TIMES RUIWEI ANTI VIBERATION EQUIP LTD

Water-bearing rock stratum borehole wall structure and construction method

ActiveCN105201514AImprove compactness and bond strengthHigh radial stiffness and bearing capacityShaft liningPre embeddingEnvironmental geology
The invention discloses a water-bearing rock stratum borehole wall structure and a construction method and belongs to a borehole wall structure and a construction method. The borehole wall is formed by an anchor pull rod I, an anchor pull rod II and a steel frame which are fixed on the surrounding rock, and concrete poured in a whole net frame to form a cylindrical borehole wall. The construction method comprises the following steps: manufacturing the anchor pull rod I and the anchor pull rod II on the surrounding rock body; then binding the borehole wall steel frame, connecting the anchor pull rod I and the anchor pull rod II with the steel frame, and connecting a pre-embedded grouting pipe; subsequently mounting a template and pouring the concrete; dismounting the template from the borehole wall and after the borehole wall reaches a certain strength, applying pre-tightening force to the anchor pull rod II by screwing an end nut; and finally grouting slurry via the pre-embedded grouting pipe in the anchor pull rod II, filling slurry liquid in holes in an interface between the borehole wall and the surrounding rock body through slurry transmission holes, and switching off a valve after finishing grouting the slurry. The water-bearing rock stratum borehole wall structure has the advantages that due to the fact that the borehole wall and the surrounding rock bear together, the radial stiffness of the borehole wall is improved, the accumulation of high-pressure water on the external surface of the borehole wall is avoided, and the structure has higher bearing force than that of a structure with the same section size and material, so the construction cost is greatly reduced, and the safety is improved.
Owner:CHINA UNIV OF MINING & TECH

Primary mirror flexible support mechanism

A primary mirror flexible support mechanism relates to a primary mirror flexible support mechanism. The mechanism is provided to solve the problem of the existing primary mirror support mechanism, namely, the existing mechanism cannot isolate outside temperature change and has alignment error, the axial support component mechanism and the radial support mechanism interfere with each other as the pitch angle changes, and thus, the surface shape of the primary mirror is affected. The primary mirror flexible support mechanism comprises a support base, an axial support component supporting a primary mirror, a tensile component glued onto the back of the primary mirror, a radial support component glued to the center of the primary mirror, and a protective component. The radial support component comprises a flexible mandrel adhered into the center hole of the primary mirror, a center cylinder installed in the middle of the support base through spigot fitting, and a flexible diaphragm arranged between the center cylinder and the flexible mandrel. The protective component comprises an O-shaped rubber ring and a protective ring. The problem that the primary mirror may be broken due to overturn after failure of the axial support is prevented. The protective device ensures that the primary mirror can be protected under certain amplitude of vibration.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Braided textile sleeve with axially collapsible, Anti-kinking feature and method of construction thereof

A protective textile sleeve and method of construction thereof are provided. The sleeve has a tubular wall of braided yarns extending lengthwise along a central longitudinal axis between opposite ends. At least some of the braided yarns including heat-set yarns, and the wall has a plurality of annular first regions forming generally convex ridges and a plurality of annular second regions forming generally concave valleys. The first regions alternate with the second regions along the central longitudinal axis. The first regions include a plurality of twisted yarns forming a plurality of closed loops, wherein at least some of the braided yarns pass through at least some of the closed loops within the first regions to enhance the radial stiffness and resistance of the wall to kinking.
Owner:FEDERAL MOGUL POWERTAIN LLC
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