212 results about "Retraction cord" patented technology

The present invention provides a bi-directional catheter with nearly double the throw in its catheter tip deflection. In particular, the travel path of each the puller wire includes a U-turn or doubling-back around a pulley which minimizes the offset angle between the puller wire and the longitudinal axis of the control handle while maximizing the travel distance of that puller wire for any given distance traveled by the pulley drawing the puller wire. In one embodiment, the catheter has an elongated catheter body, a catheter tip section with first and second diametrically-opposed off-axis lumens, and a control handle which includes a steering assembly having a lever structure carrying a pair of pulleys for simultaneously drawing and releasing corresponding puller wires to deflect the tip section of the catheter.

An improved steerable catheter comprises an elongated tubular catheter body with a flexible tip section. A pair of slidably mated puller wires fixedly attached to each other at their distal ends extend from a handle at the proximal end of the catheter body through a lumen in the catheter body and into a lumen in the tip section. Proximal movement of one puller wire relative to the other results in deflection of the tip section.

A multi-stages retractable coiling cord is disclosed. The coiling cord comprises a front cover, a spiral spring, a sliding disc, a retraction cord, a positioning bead and a rear cover. The cord is retracted and is positioned once when the sliding disc rotates once. A slight pull will allow the coiling cord to release from engaging.

A medical device control handle or catheter includes deflection assembly and at least one of the following: a disk actuator, a lever actuator and a ring actuator for actuating additional puller wires in manipulation of multiple features of the medical device or catheter independently of each other. The disk actuator has a common rotational axis with but is rotationally independent of the deflection assembly. The lever actuator has a separate rotational axis. The ring is mounted outside of the control handle and rotatable relative to the control handle to actuate another puller wire for manipulating another feature of the catheter.Each of the disk, lever and ring actuators are of a design that allows existing control handles and catheters to be readily modified to include these actuators.

A plunger-type control handle comprising an elongate housing (42) for controlling the deflection of a distal tip of a catheter. The control handle includes a spool (112) driven by a gear (102), the spool being connected to the proximal end of at least one pull wire (32a). For bi-directional deflection, a second proximal end (32b) of a pull wire is connected to the spool such that when one of the proximal ends is collected by the spool, the other of the proximal ends is released in an equal amount. The gear is operatively coupled to the plunger (92) and engages a gear rack (84) disposed on the control handle housing, such that when there is relative movement between the housing and the plunger, the gear and spool are rotated.

An orthodontic device and an orthodontic method that can prevent an orthodontic treatment from being eccentrically performed while aligning straightly tooth. The orthodontic device includes teeth-attachment unit attached to an orthodontic tooth object; and hook member provided in the teeth-attachment unit and having a connection part of traction unit for orthodontic treatment that is located in the vicinity of a center of resistance (CR) of a tooth. In addition, the orthodontic device includes teeth-attachment unit; and hook member provided in the teeth-attachment unit and having a connection part of traction unit for orthodontic treatment that is located in the vicinity of at least gingiva. Since the teeth-attachment unit of a bracket or a button is substantially horizontal to a traction line of the traction unit, it is possible to perform the orthodontic treatment effectively without eccentric phenomenon in which the tooth and a dental root are tilted.

An orthodontic bracket mountable on a tooth for use in retraction mechanics to facilitate movement of teeth along an arch, which includes an archwire receiving member rotatably mounted on a base and structured to freely rotate when tipping a tooth during sliding of the bracket along an archwire thereby minimizing friction between the archwire and bracket to significantly decrease the required retraction force, and treatment time, thereby minimizing the possibility of root resorption and maintaining the integrity of the root and surrounding bone. A locking pin for locking the member against rotation is employed when uprighting the tooth from a tipped position.

An adjustable hairpiece includes a hairpiece network with a flexible perimeter member having network ports, for fitting around the head of a wearer, the perimeter member having a forward segment and two side segments; two longitudinal guide lines each having network ports, the longitudinal guide lines having guide line forward ends secured to the forward segment and extending rearwardly, the longitudinal guide lines being laterally spaced apart from each other and defining a hairpiece top region and two hairpiece side regions; a flexible network draw line having a draw line middle segment located substantially between the longitudinal guide lines and dividing the network draw line into two draw line half segments, each half segment extending from the draw line middle segment across the top region forwardly and rearwardly in a spaced and repeating spiral crossing sequence while spiraling through ports alternately in the forward segment and in the given longitudinal guide line on the corresponding side of the hairpiece, and then each guide line half segment repeatedly crossing the corresponding side region in a spaced and repeating spiral crossing sequence through ports in the corresponding side segment and in the corresponding longitudinal guide line, the draw line half segments each terminating in a half segment free end; and a quantity of hair strands for securing to the hairpiece network; so that pulling the half segment free ends away from the network causes the draw line to contract the hairpiece against a wearer scalp.

A shoulder-carriable wheeled cart assembly includes a cart frame, a detachable backpack mountable on the cart frame, a plurality of laterally spaced support pegs mounted on the cart frame lower end portion, and a detachable harness strap. The harness strap is tightenable about articles mounted on the support pegs between the harness strap and the cart frame to secure said articles against the cart frame. A support tray attachable to the support pegs and interposable between the articles and the support pegs stabilizes the mounting of the articles on the support pegs. The cart assembly is mountable on a mobile passenger vehicle, such as a bicycle, via a docking fixture that receives and secures the cart assembly. A retraction cord connected to the harness strap upper end urges the harness strap upper end toward the upper portion of the frame, thereby avoiding dragging the harness strap along the ground.

The invention relates to an electromechanical apparatus, namely a building concealed circuit threader comprising a pull wire (3) which can be inserted into wire conduit (31) openings (32) and can pass through in the wire conduit (31). The building concealed circuit threader is characterized in that the threader is provided with a box-shaped shell (1), the front end of the shell (1) is provided with plugboards (5) matched with the wire conduit openings, the shell (1) is internally provided with a reel (2) for reeling the pull wire (3), a clamping device (4) for the pull wire (3) is arranged between the plugboards (5) and the reel (2), and the clamping device (4) is connected with an electric motor (9) by a drive disk assembly. The building concealed circuit threader has the beneficial effects that the plugboards are inserted into the openings at one part, and one person controls the threader remotely to perform threading operation, thus the labour intensity is low, the working performance is high, and the theader is hopeful to be the necessary apparatus for the building concealed circuit installation.

A pulling-wire waterway switching mechanism has a fixed unit, a water division body, a ratchet shaft, a stopping claw, a returning body and a pulling wire. The water division body can be rotationally arranged in the fixed unit, and can use the rotation between the water division body and the fixed unit to achieve the switch of the outlet functions, a plurality of lower ratchets in anuular array are arranged on the top surface of the water division body, and a plurality of stopping teeth in anuular array are arranged on the outer rotative surface of the water division body. The ratchet shaft provided with a pulling block extending out of the fixed unit and a plurality of upper ratchets in annular array. The pulling block drives the ratchet shaft to rotate forward. The upper ratchets can drive the water division to rotate forward.

The invention relates to a magnetic auxiliary tensioning device for a single-pore laparoscope. The magnetic auxiliary tensioning device for the single-pore laparoscope comprises an abdominal wall outer electromagnet capable of adjusting a magnetic force and an abdominal wall inner electromagnet matched with the abdominal wall outer electromagnet, a semicircular ring is connected to the bottom of the abdominal wall inner electromagnet; a pull wire passes through the semicircular ring; and one end of the pull wire is connected with a nonmagnetic titanium alloy forceps clip. When a single-pore laparoscopic surgery is performed, the pull wire can pass through the semicircular ring and an abdominal cavity notch to be controlled in vitro, and a performer indirectly controls and pulls the gall bladder through the pull wire, so by the method, the crowded state of single-pore instruments is improved by using the pull wire; and the pull power is controlled by the performer, so flexibility of the surgery is improved; and the pull direction is adjusted by moving the abdominal wall outer electromagnet to change the position of the abdominal wall inner electromagnet and the pull wire can be pulled to any directions in the range of 360 degrees, so the magnetic auxiliary tensioning device is flexible to use, without adding additional wounds.

The invention relates to an occluder delivering device with the adjustable head bending angle in the field of minimally invasive operation medical instruments, in particular to a direction-controllable puncture sheath. The direction-controllable puncture sheath comprises a tube and a puncture core; the puncture core comprises a guide head, a guide tube, an elastic connector and a traction line; the guide head is connected to the guide tube through the elastic connector and is fixedly connected to the traction line, the traction line is connected to an operation handle of the far end and is pulled through the operation handle so as to steer the guide head corresponding to the guide tube, and the puncture core drives the tube to steer. The traction line is fixed to the guide head and is connected to the operation handle, according to the technical scheme of allowing the operation handle to pull the traction line to force the guide head to steer, and the defects that when an puncture sheath is used during an operation currently, a guide track for allowing the guide line required by a human body to penetrate is established, the positioning effect of the guide line is poor, the puncture difficulty is increased, operation is complex, operation time is prolonged and pain of a patient is increased are overcome.

A catheter has a deflection beam with rectangular cross-section and a single continuous puller wire for predictable on-plane bi-directional deflection. The puller wire extends through spacers on opposite sides of the beam so the puller wire is maintained a predetermined separation distance from the beam surface. Tubular structures of the catheter body and the deflectable section are fused at a joint by C-shaped brackets mounted opposite surface of the beam to form a hollow body with holes into which thermoplastic materials covering the catheter body and the deflectable section can melt to form interlocking nodes. Elongated beam stiffeners can be mounted on the beam to provide different curve and deflection geometries.

A retractable pet leash having an integrated lamp powered by an electric generator. A spool is rotatably mounted inside a housing and a leash cord is coiled on the spool. The spool rotates in a first direction of rotation as the leash cord pays out through an opening provided in the housing. A spring inside the housing is configured to bias the spool toward rotation opposite the first direction of rotation, for retracting the leash cord. A circular toothed gear is attached to the spool for synchronous rotation and a set of speed change gears are configured to translate rotation of the circular toothed gear to turn the generator. A cup gear, having an inner wall provided with a unidirectional teeth groove, engages a speed change gear. A prism plate with pivotally mounted pawls is rotatably mounted in contact with the unidirectional teeth groove, for translating rotation in one direction only, to the generator. The generator outputs direct current to a circuit board. The circuit board includes a set of capacitors for storing electric potential and an electric filter for outputting a stable power supply to energize the lamp.

According to one embodiment, a retractable pet leash device is provided with a housing containing a storage part and a handle part. The storage part has a cavity to receive a reel to store a leash cord in a retractable or coiled condition. An aperture is provided in the wall of the storage part to permit the withdrawal of the leash cord or to retract the leash cord. A push button provided in the wall of the storage part is operated to retract the leash cord into the storage part. A hinged mechanism containing an elongate member is provided in the handle part provided with a notch portion to receive a stationary object so that the elongate member is pivotally moved to open and close the handle part around a stationary object. For objects of larger size, the leash cord is wound around the object to form a loop and locked into the handle part. Another push button is provided in the handle part to release the elongate member from the locked condition.

An absorbent and degradation resistant knitted gingival retraction cord comprising silk is formed from one or more strands by interlocking a plurality of loops. As a whole, the knitted retraction cord comprises at least about 50% silk which, when manufactured so as to have a knitted structure, exhibits resistance to degradation and has the ability to absorb liquid (e.g., an active agent solution). An active agent is impregnated within the one or more strands and / or the plurality of interlocking loops of the knitted retraction cord such that the cord advantageously retains the active agent and resists degradation by the active agent.

The invention discloses an endoscope bending mechanism free of rivet connection. The mechanism comprises a main frame (1), a net, laminated rubber (2) and pull wires (3), wherein the main frame (1) is wrapped in the net and the laminated rubber (2), the multiple pull wires (3) are arranged in the main frame (1) in a penetrating mode, and then the endoscope bending mechanism free of rivet connection is formed. A round connecting lug on a connecting ring is connected with an incomplete round hole of an adjacent connecting ring to form a rotary pair, each connecting ring is formed by cutting a thin-walled round tube, connecting lug punching and riveting assembly adopted in the traditional connecting method are omitted, rotation is flexible, size precision and matching precision are high, designing, machining and assembly are convenient, and remarkable effect is realized during manufacturing of small-pipe-diameter and multi-bending-direction bending mechanisms.

An orthodontic bracket mountable on a tooth for use in retraction mechanics to facilitate movement of teeth along an arch, which includes an archwire-receiving member rotatably mounted on a base and structured to freely rotate when tipping a tooth during sliding of the bracket along an archwire thereby minimizing friction between the archwire and bracket to significantly decrease the required retraction force, and treatment time, thereby minimizing the possibility of root resorption and maintaining the integrity of the root and surrounding bone. A locking pin for locking the member against rotation is employed when uprighting the tooth from a tipped position.

A retractable pet leash having an integrated lamp powered by an electric generator. A spool is rotatably mounted inside a housing and a leash cord is coiled on the spool. The spool rotates in a first direction of rotation as the leash cord pays out through an opening provided in the housing. A spring inside the housing is configured to bias the spool toward rotation opposite the first direction of rotation, for retracting the leash cord. A circular toothed gear is attached to the spool for synchronous rotation and a set of speed change gears are configured to translate rotation of the circular toothed gear to turn the generator. A cup gear, having an inner wall provided with a unidirectional teeth groove, engages a speed change gear. A prism plate with pivotally mounted pawls is rotatably mounted in contact with the unidirectional teeth groove, for translating rotation in one direction only, to the generator. The generator outputs direct current to a circuit board. The circuit board includes a set of capacitors for storing electric potential and an electric filter for outputting a stable power supply to energize the lamp.

A method of taking a dental impression of dentition includes preparing the dentition with a gingival retraction cord. The gingival retraction cord having been contacted with a wetting agent. The method also includes thereafter contacting the dentition with a dental impression material.

An orthodontic bracket mountable on a tooth for use in retraction mechanics to facilitate movement of teeth along an arch, which includes an archwire-receiving member rotatably mounted on a base and structured to freely rotate when tipping a tooth during sliding of the bracket along an archwire thereby minimizing friction between the archwire and bracket to significantly decrease the required retraction force, and treatment time, thereby minimizing the possibility of root resorption and maintaining the integrity of the root and surrounding bone. A locking pin for locking the member against rotation is employed when uprighting the tooth from a tipped position.

A retraction cord for retracting gingival tissue is pre-impregnated with a chemical agent for chemically retracting gingival tissue and / or a hemostatic agent for arresting bleeding. A wetting agent is further applied to the cord to ensure product efficacy and shelf stability. The retracting agent may be an astringent water soluble organic salt such as aluminum potassium sulfate, aluminum sulfate, aluminum chloride, or ferric sulfate-or an inorganic salt of organic vascoconstrictors such as epinephrine, pseudoephedrine, or VISINE. The wetting agent is preferably a non-ionic surface active surfactant such as SILWET L-7607 at a concentration of 0.05% by volume.

A traction device for use in surgery is disclosed with the traction device being secured to one side of a surgical table. The traction device includes one or more traction lines which include a line-tensioning device at one end thereof and a connector at the other end thereof for attachment to the limb of a patient undergoing surgery. A tension meter is associated with each of the traction or lines with the tension meter being connected to a readout which indicates the tension or traction force being imposed in the traction line. The traction device may be used for patients undergoing shoulder surgery or other types of limb surgery.

A pull down light fixture having a cover connected to a bottom portion of the light fixture. A power source is connected to the light fixture via a power cord. A power cord base engages a ceiling for housing the power cord. A predetermined plurality of retraction cords are connected to the cover for at least one of raising and lowering the cover. A retraction cord mechanism is connected to each retraction cord for enabling such retraction cords to at least one of extend and retract. A predetermined plurality of retraction cord bases engage the ceiling for housing each retraction cord and retraction cord mechanism. A pull down attachment is connected to the light fixture for enabling the light fixture to be pulled down.

The invention discloses a ureteral stent device which comprises an ureteral stent tube and an urethral catheter, wherein a pull line of the ureteral stent tube comprises a magnetic adsorption section and an elastic section for ensuring the length of the pull line to be less than the length from the tail part of a stent tube body to an urethral orifice of a patient after the ureteral stent tube is implanted into the body of the patient when the elastic section in a freely expanded state; the elastic section is an elastic silk thread; the elastic section is arranged between the stent tube body and the magnetic adsorption section; the magnetic adsorption section is a silk thread with interrupted iron cores; the urethral catheter comprises an outer sheath and an inner core; the inner core is sleeved in the outer sheath in a slideable mode; the inner surface of the head part of the outer sheath and the outer surface of the inner core are surrounded into a pull line fixing cavity; and a magnetic part is arranged at the position of the inner core, close to the head part of the inner core. Compared with the existing pull line, in the using process of the ureteral stent device provided by the invention, the pull line is totally retained in the body of the patient and cannot be stained by outside dirts, so that the patient cannot be infected by pollution to the pull line and the patient also cannot feel uncomfortable due to a thread end exposed out of the body of the patient.

An apparatus for adjusting a layer of fabric attaches to a garment to manage the body heat of the user. The apparatus includes a lining that may be extended to substantially the width of the garment worn by the user or retracted to reduce the area surrounding the user. The apparatus includes controllers for moving the lining between the extended position and the retracted position, which include extension cords and retraction cords connected to the lining. The extension cord is connected between a proximal end of the lining and an extension grip. The retraction cord is connected between the proximal end of the lining and a retraction grip. In the extended position, the lining surrounds a substantial portion of the user. When the retraction grips are drawn, the proximal end of the lining will be moved toward the distal end of the lining. To return the lining to the extended position, the user will pull the extension grips and the proximal end of the lining will move away from the distal end of the lining.