42results about How to "Reduce kinks" patented technology

A surgical instrument for illuminating a surgical field has an optical waveguide for transmitting light by total internal reflection. One or more control elements are disposed on the optical waveguide. The control elements extract light from the optical waveguide and control first and second optical properties of the extracted light. Another surgical instrument includes a first and second optical waveguide for transmitting light by total internal reflection. A coupling element is attached to both optical waveguides such that the optical waveguides are movable and pivotable relative to one another.

A spiral cut transition member is disclosed for controlling the transition in stiffness of a catheter from a stiffer more pushable proximal section to a more flexible and trackable distal section and increasing kink resistance. The transition member has a spiral cut provided therein to vary the flexibility of the transition member over its length. The pitch of the spiral cut can be varied to facilitate a gradual transition in flexibility along the catheter. The transition member may be used in conjunction with any type of catheter including single-operator-exchange type catheters, over-the wire type catheters, and/or fixed-wire type catheters.

A peristaltic pump is provided that simplifies the loading of tubing and automatically self-centers the tubing relative to the pump wheel, wherein the pump includes an elongated arm having slotted pinch forks for engaging the tubing. The pinch forks are arranged substantially tangential to the pump wheel to reduce tubing kinking. The pump further includes a spring-loaded clamp that moves the elongated arm between engaged and disengaged positions, the clamp optionally including a sensor element used to detect when the pump is ready for operation.

The invention relates to a catheter. The occurrence of kinking is reduced, a proximal portion of a sheath exhibits steerability and the occurrence of a crack is suppressed. The catheter comprises a sheath to be inserted into a living body, wherein the sheath includes a tubular reinforcement layer of at least one layer, which is formed with a spiral slit continuous from the distal side to the proximal side thereof; a termination end of the spiral slit is provided on the proximal side of the slit proximal portion at the site of the proximal side of the spiral slit; and at the same time, there is formed a slit termination portion in which inclination angle of the spiral slit with respect to the circumferential direction of the reinforcement layer is larger than that of the slit proximal portion.

A thermal cycler includes a holder receiving a reaction chamber including a channel filled with reaction mixture and an immiscible liquid having different specific gravities and allowing the reaction mixture to move along an opposed inner wall, a temperature gradient forming unit forming a temperature gradient in the movement direction of the reaction mixture relative to the channel during loading into the holder, and a driving unit rotating the holder and temperature gradient forming unit about a rotation axis having a component perpendicular to the gravitational direction and a component perpendicular to the movement direction of the reaction mixture, and a maximum distance from the rotation axis to a point in the channel is smaller than a maximum distance connecting two points in the channel when projected on a plane perpendicular to the rotation axis.

The invention generally relates to a tab used to open beer/beverage can ends and food can ends. The tab has one or more arcuate strips that are provided on a surface of the tab proximate to a peripheral surface of the tab where the one or more arcuate strips have been formed further into a preselected portion of curled or hemmed portions of the tab. Tooling for the manufacture of the tab is also provided. A method for manufacturing the tab is additionally provided as well.

An enteral feeding catheter includes inner and outer layers of tubes and a spring positioned between them. The inner and outer tubes are coupled together so that the spring is held between them. The spring includes a helical wire and the distance between each adjacent coil is driven to equal the thickness of the wire. The combined thickness of the first and second tubes is less than or equal to the thickness of the wire.

The invention discloses an air jet loom weaving method for a polyester cotton core-spun yarn fabric with a polyester filament as a core and cotton fiber wrapped outside polyester, which orderly comprises working procedures such as doubling, twist stabilization after twisting, warping and rebeaming, reeding, loom beam on-hook, adjustment of process parameters and so on. In the working procedure of batch warping, the rebeaming is performed on a sizing machine, and the sizing is not performed; during the reeding after the rebeaming, 50 to 100 percent of harness frame numbers are increased than the prior species according to the warp density; the weft-insertion time is adjusted to ensure that the weft-insertion time of previous group of auxiliary nozzles is longer than that of next group of the auxiliary nozzles and the weft-insertion time is orderly shortened in a step shape, and the entire auxiliary nozzles are synchronously closed at the same angle position. The working procedures after the adjustment effectively solve the problem that the dyeing of the polyester cotton core-spun yarn fabric has color difference after the polyester cotton core-spun yarn fabric is woven on an air jet loom, and ensure that the polyester cotton core-spun yarn fabric can be fully and normally woven on the air jet loom. The weaving efficiency can reach 96 percent, the rate of first-grade products when getting off the loom can reach more than 93 percent, woven cloth has qualified various indicators and fully satisfies the normal production of the dyeing and finishing, and no quality problem exists after the dyeing.

The invention discloses a jet overflow dyeing machine nozzle, comprising a nozzle carrier and a nozzle core carrier and a nozzle cover which are arranged in the nozzle carrier; wherein the nozzle core carrier and the nozzle cover are in funnel shape, the lower end of the nozzle cover is inserted into the nozzle core carrier, an annular gap is arranged between the nozzle core carrier and the nozzle cover, the annular gap is a dye liquor injecting port, the nozzle carrier is provided with a nozzle fluid pipe, the lower end of the nozzle core carrier is connected with the nozzle carrier by screw thread, a spacer is arranged between the lower end face of the nozzle core carrier and the nozzle carrier, and the outer wall of the nozzle core carrier is provided with a plurality of watertight shutters separated each other. The invention can prevent reflow from being produced in curved pipe of nozzle and reduce textile kinking and 'tympany'. When installing the nozzle, the thickness of the spacer between the nozzle carrier and the nozzle core carrier is adjusted to regulate the size of the dye liquor injecting port and the angle between the watertight shutter on the nozzle core carrier and the nozzle fluid pipe, thus realizing regulation of liquid flow jet speed and pressure.

The invention discloses a warping bobbin creel for fine metal wires and belongs to the field of spinning mechanical parts. The warping bobbin creel comprises electromagnetic brakes, wherein each bobbin insertion rod on the warping bobbin creel corresponds to one electromagnetic brake, and the electromagnetic brakes are used for driving the corresponding bobbin insertion rods to revolve. Accordingto the invention, the electromagnetic brakes drive the bobbin insertion rods so as to drive the bobbin to revolve, so that the revolving unwinding of the bobbin is realized, and combination of tangential unwinding and revolving unwinding of the metal wires is adopted, and thus metal wire twisting due to friction between the metal wires and a yarn guide part during warping of the metal wires and residual torques is reduced, furthermore, a problem of the plating abrasion of the metal wires containing plating layers of regular bobbin creels is solved, uniform tension of sheet yarn is realized, the warping quality of the coiled metal wires is improved , and warping requirements of the fine metal wires are met.

Methods and devices related to fluid delivery catheters and more particularly relates to catheters used to deliver fluid to medical devices and/or position medical devices.

The invention discloses a tobacco sheet slurry preparation method and millstone structures. The method includes the steps that tobacco stems are extracted first and then subjected to solid-liquid separation after being screened and washed; then the tobacco stems is mixed with tobacco waste through high-concentration fiber dissociation, and extraction is conducted after mixing; an extracted mixture is subjected to first-stage beating and second-stage beating, and slurry for sheet making is formed. The millstone structures fall in three kinds, the first kind comprises two fiber dissociation millstones, and a crushing area, a pre-fiber dissociation area and a fiber dissociation area in sequential connection are arranged on each fiber dissociation millstone; the second kind comprises two first-stage beating millstone, and a defibering area, a first pre-beating area and a first-stage beating area in sequential connection are arranged on each first-stage beating millstone; the third kind comprises two second-stage beating millstones, and a rough grinding area, a second pre-beating area and a second-stage beating area in sequential connection are arranged on each second-stage beating millstone. According to the tobacco sheet slurry preparation method and the millstone structures, the material production requirements can be rapidly met, and the beating degree can be lowered by 5 degrees of SR or above, so that the drainage property of a production process is improved, and energy consumption of production is reduced.