1203 results about "Retainer" patented technology

A tensioning device comprising a guide adapted to receive thereabout one end of a looped operating element (“LOE”), a retainer configured to prevent said one end from traveling about the guide, the guide and retainer being configured to move relative one another between first and second positions; a biasing element for biasing the guide towards the retainer to tension the LOE. In the first position, the LOE has no tension and the guide is extended to trap said one end between the guide and the retainer to prevent travel of the LOE about the guide. In the second position, the LOE is tensioned with the guide being retracted from the retainer, and a locking device for locking the guide in the first position when the LOE has no tension such that the guide cannot be retracted away from the retainer to allow operation of the operating element.

The utility model provides a positioning object retainer. The positioning object retainer comprises a mounting seat, a disc body rotationally connected relative to the mounting seat, and a plurality of retaining components, the retaining component forms a rotating section, a connecting section and an adjusting section which are continuously arranged, the free end, away from the connecting section, of the adjusting section is connected with an everted section, the top end of the everted section extends upwards, and an included angle is formed between the length direction of the everted section and the length direction of the connecting section; an annular space for the connecting section to rotate is formed between the disc body and the mounting base, the hollow part pushes the adjusting section to rotate relative to the mounting base with the rotating section as the axis and the connecting section as the radius, and the adjusting section moves relative to the length direction of the hollow part in the rotating state and synchronously keeps a positioning object with the outwards-turned section. The cup body clamp is used for solving the problems that in the prior art, a cup body clamp cannot meet the clamping requirements of cup bodies in other shapes except for a conventional columnar cup body, and the adaptation range is limited.

The invention discloses a reverse type annular tooth groove planetary roller screw which comprises a nut, a screw rod, a plurality of rollers and a retainer, a multi-head internal thread is arranged in the nut, the rollers and the screw rod are both of an annular tooth groove structure without a helix angle, and the annular tooth grooves of the rollers are meshed with the internal thread of the nut and the annular tooth grooves of the screw rod respectively; first gears are machined at the two ends of the annular tooth groove of the lead screw, second gears are machined at the two ends of the annular tooth groove of the roller, and the first gears are meshed with the multiple second gears at the same time. The retainer is of an integral flexible retainer structure, and the pin rollers have the self-adaptive capacity in multiple directions in the circumferential direction and the radial direction through the retainer. And an arc-shaped roller path is designed on the screw rod and is matched with the ball spline housing to play a linear rolling guiding and rotation stopping role on the screw rod. The reverse lead screw has the advantages of being large in transmission ratio, compact in structure, easy to machine and assemble, low in cost, good in self-adaptive performance, high in positioning precision, good in reliability and the like.

The invention discloses an interventional tube fixator, which relates to the technical field of medical instruments and comprises a base frame, an interventional tube static clamping plate, a sliding hole, clamping teeth, an interventional tube movable clamping plate, a countersunk head clamping hole and a movable clamping drive retaining module, the movable clamp driving and maintaining module is assembled in the sliding hole in a sliding mode through a strip-shaped sliding block, the front end of the movable clamp driving and maintaining module is provided with an elastic clamping head detachably clamped in the countersunk head clamping hole, the rear end of the movable clamp driving and maintaining module is connected with an elastic clamping plate, and the surface of the elastic clamping plate is provided with continuous sawtooth clamping grooves matched with the clamping teeth; a first handle is arranged at the rear end of the strip-shaped sliding block, and a second handle is arranged at the rear end of the elastic clamping plate. The continuous sawtooth clamping grooves can be separated from the clamping teeth by pressing the two handles, when the strip-shaped sliding block is pushed to move forwards, the elastic clamping plate enables the clamping grooves to be meshed with the clamping teeth under the action of elastic force, and rapid clamping and releasing of the interventional tube are achieved. The fixing device is simple in structure, convenient to operate, capable of effectively preventing the interventional tube from shifting and suitable for fixing the interventional tube in oral surgery or examination.

A floating joint and retainer connection device includes a fixed retainer internally defines a receiving space; an adaptor joint having an end extending through the receiving space to an outer side of the fixed retainer and an axially limiting section formed near another end; a fixing element fitted on the adaptor joint and located outside the fixed retainer for limiting the adaptor joint from moving axially while allowing the adaptor joint to displace radially relative to the fixed retainer; a rolling assembly disposed adjoining the fixed retainer; and a spring located in the receiving space and fitted on the adaptor joint with two ends pressed against the axially limiting section and the fixed retainer or the rolling assembly. When the rolling assembly rolls to displace radially relative to the fixed retainer, a radial frictional force produced by a normal force applied by the spring to the fixed retainer is reduced.

A coupling assembly for coupling a rod to a bone anchoring element, including a receiving part having first and second ends, a recess at the first end for the rod, and an accommodation space for a head of the bone anchoring element, the accommodation space having an opening at the second end to permit insertion of the head into the receiving part, a retainer element configured to be arranged at least partially in the accommodation space and to hold at least part of the head, and a spring element configured to be arranged at least partially in the accommodation space and to be compressed in an axial direction. The retainer element and the spring element are separate parts. When the retainer element and the spring element are in the accommodation space of the receiving part in a first position, the spring element extends into the recess of the receiving part.

The present invention provides devices and methods for establishing aseptic connections between two or more components or subassemblies. The devices may be used in medical devices such as drug delivery pumps (10). In some embodiments, a connection is made between a drug container (50, 1050, 2050) and a fluid pathway connection assembly (300, 1300, 2300). The fluid pathway connection assembly may include a connection hub (312, 1312, 2312), a piercing member (316, 1316, 2316), and a piercing member retainer (314, 1314, 2314). The assembly may further include a first film (318, 1318, 2318) covering a cavity (312A, 1312A, 2312A), thereby maintaining the aseptic condition of the cavity. The drug container may hold a fluid drug and include a pierceable seal (326, 1326, 2326). A second film (322, 1322, 2322) may cover a recess (328, 1328, 2328) formed by the seal and thereby maintain the aseptic condition of the interior of the chamber. The piercing member may be caused to pierce the first and second film and the pierceable seal to open a fluid pathway for delivery of the fluid drug through the fluid pathway connection assembly.

Disclosed is a fastener assembly for coupling a first component to a second component. The fastener assembly includes a fastener and a stamped-metal retainer. The fastener includes a head and a shank. The stamped-metal retainer includes a body portion, and a pair of retainer legs resiliently coupled to the body portion. The body portion includes a plate with an internally-threaded collar that defines a retainer opening configured to receive and secure at least a portion of the shank. Each of the pair of retainer legs defines a first retention zone between a first angled engagement surface and the plate that is configured to accommodate second components within a first thickness range, and a second retention zone between a second angled engagement surface and the plate that is configured to accommodate second components within a second thickness range. The distance between the first angled engagement surface and the plate is greater than the distance between the second angled engagement surface and the plate.

An engagement structure of a ratchet wrench, the ratchet wrench contains: a body which including a drive head, a ratchet portion, and the engagement structure. The engagement structure includes a through orifice, a first defining notch, a second defining notch, a receiving notch, and a spring. An abutting member includes a first arcuate cutout, a coupling column, a locking orifice, and a first limitation protrusion. A retainer is mounted on the through orifice and includes a second arcuate cutout, a connection trough, a passing aperture, and a second limitation protrusion. When the abutting member is received in the through orifice, the first limitation protrusion is engaged in the first defining notch, the coupling column is connected with the connection trough, and a locking element is locked with the locking orifice. The second limitation protrusion is engaged in the second defining notch, and the spring abuts against the coupling column.

The invention relates to a reverse toothless planetary roller screw, and belongs to the technical field of roller screws, the reverse toothless planetary roller screw comprises a screw rod, a long nut, a planet carrier assembly and a plurality of rollers, and the periphery of the screw rod is sequentially provided with a front optical axis section, an external thread section and a rear optical axis section; internal threads are arranged on the inner wall of the nut; each roller comprises a threaded part in the middle and polished shaft parts at the two ends; the thread part of the roller and the external thread section of the lead screw are opposite in rotation direction and equal in lead angle; the planet carrier assembly comprises a middle retainer and end covers at the two ends, at least three opening grooves used for assembling the pin rollers in the radial direction are formed in the outer side of the middle retainer, and positioning holes in clearance fit with the optical axis parts of the pin rollers are formed in the end covers. By canceling a screw rod gear / ring groove and pin roller gear / ring groove structure and combining a double matching mechanism of the planet carrier assembly, the machining bottleneck of a composite structure is thoroughly eliminated, the axial parallelism and the constant lead characteristic of the pin rollers are guaranteed, meanwhile, vibration noise is remarkably reduced, and high-precision and large-scale mass production is achieved.

A headgear connector may include a retainer connectable to a patient interface and including a first engagement structure; and a buckle connectable to a strap of the patient interface and including a second engagement structure. Either the first engagement structure or the second engagement structure may provide a female engagement structure, and the other of the first engagement structure and the second engagement structure may include a male engagement structure. The male engagement structure may include a stem protruding from a surface and a plurality of deflectable pegs protruding from the surface and positioned about the stem. The female engagement structure may include a receptacle defining an opening. The headgear connector is transitionable between an engaged state in which the snap is coupled to the retainer and a disengaged state in which the snap is discoupled from the retainer. In the engaged state, the male engagement structure may be received within the female engagement structure.

Logic may interact with a user to generate or modify a code block of adjustments for a prescription or interact with the user via two-dimensional or three-dimensional image(s) to generate or modify a correction path of the treatment plan for a bone fixator. Logic may generate the prescription based on a deformity correction associated with a code block or based on a deformity correction identified by the user by modifying existing waypoints and / or adding new waypoints to the correction path. Logic may generate a display of an image of a fixed and a moving bone segment connected to the bone fixator and adjust the display to show a state of the bone deformity and the bone fixator at a point in time of the prescription selected by the user. And logic may display the remaining bone deformity for correction for the user during generation or modification of the correction path.

Systems and methods for preparing a ligament graft for a ligament reconstruction procedure are provided. In general, the described techniques utilize a graft holder construct having a graft preparation holder and a suture assembly removably coupled thereto. The graft preparation holder includes an elongate support rail having a longitudinal axis, and a plurality of leaf segments positioned along the longitudinal axis in a spaced relationship and extending laterally from the support rail. The leaf segments can bend to a graft holding configuration so as to define a graft receiving channel configured to receive a graft therethrough. The holder also has at least one support structure configured to mate with the leaf segments to provide stability and rigidity to the segments. The suture assembly has at least one suture tail that can be pulled to affix the suture assembly to a graft without penetrating the graft.

The invention provides a condyle positioning device and a lower jaw fixator with the condyle positioning device.The condyle positioning device comprises a condyle positioning component, a tooth retention guide plate and a dividing structure formed between the condyle positioning component and the tooth retention guide plate. Wherein the tooth retention guide plate and the condyle positioning component are of an integrated structure and can be separated along the segmentation structure, the condyle positioning component is suitable for being fixed to the front edge of the ramus of the mandible of a patient, and the tooth retention guide plate is manufactured based on the tooth form of the mandible part of the patient and fixed to the corresponding dentition. The condyle positioning component is connected with the lower jaw fixator through a mortise and tenon joint structure so as to position the specific position of the condyle of the patient after the lower jaw operation.

The invention discloses a head fixator for neurosurgery and an operation method thereof, and belongs to the technical field of medical auxiliary instruments. The head fixing device is used for solving the problems that an existing head fixing device is unstable in fixing, inconvenient to adjust and poor in neck supporting. A T-shaped groove is formed in the upper end face of the T-shaped plate, the T-shaped block is slidably arranged in the T-shaped groove in the length direction of a wing plate of the T-shaped plate, the head fixing assembly is arranged in the middle of the upper end face of the wing plate of the T-shaped block, the neck supporting assembly is slidably arranged on the upper end face of a web of the T-shaped block in the length direction of the web of the T-shaped block, and the two limiting assemblies are arranged at the two ends of the wing plate of the T-shaped plate respectively. The head of a patient can be firmly fixed, the head of the patient is prevented from moving in the operation process, and the accuracy and success rate of the operation are improved. And flexible adjustment can be carried out according to head shapes, sizes and operation requirements of different patients, and the requirements of various operation scenes are met. Comfortable support is provided for the neck of a patient, and fatigue and discomfort of the neck of the patient in the operation process are reduced.

The invention discloses an ultra-high-speed motor bearing anti-deformation crown-shaped retainer and a manufacturing method, and belongs to the technical field of motor bearings. The super-high-speed motor bearing anti-deformation crown-shaped retainer is formed by printing functionally graded materials, the functionally graded materials comprise a hard-phase material and a soft-phase material, the hard-phase material is glass fibers, and the soft-phase material is nylon 66; the equivalent elastic modulus of the functionally graded material is continuously and gradually changed in the axial direction from the bottom of the pocket to the tail end of the lock claw, so that the elastic modulus of the bottom area of the pocket is higher than that of the tail end area of the lock claw, and elliptical deformation of the pocket and centrifugal deformation of the lock claw are cooperatively restrained. And active reconstruction of a rigidity field of the crown-shaped retainer is achieved, specifically, a tough phase is constructed in a locking claw area to absorb collision energy, a strengthening phase is formed in a pocket area to weaken stress concentration, a rigidity gradient is established at a connecting part to restrain the umbrella-shaped effect, and the crown-shaped retainer with the high toughness-gradient-high strength characteristics and the design method of the crown-shaped retainer are provided.

A retainer system includes a catheter tube, a bifurcation, a drainage extension leg and an inflation extension leg. The system can also include an anchor pad and a retainer rotatably coupled to a top surface of the anchor pad. The retainer can include a base and a cap hingedly coupled to the base. Additionally, the retainer can feature one or more extension leg sleeves with a lumen, extending from the first side of the retainer, and a catheter tube sleeve with a lumen, extending from the second side of the retainer. The sleeve can define a serpentine shape to impart a predetermined amount of slack on the catheter and mitigate dislodgement of the catheter distal tip when the retainer system moves relative thereto. Further, the retainer system can mitigate kinking or collapse of the catheter by providing strain relief between the catheter and the retainer system.

The invention discloses a connector in the field of safe locking of connectors. The connector comprises a first shell, a wrench and a retainer, a main lock buckle is arranged on the first shell; the wrench is rotationally installed on the first shell, and the wrench is configured to be connected with the main lock buckle in a matched mode; the retaining part is movably installed on the first shell, the retaining part is provided with a first position for fixing the wrench and a second position for interfering with the wrench and fixing the main lock buckle, and the retaining part and the wrench move and interact to switch the first position and the second position; the first shell designed in the invention is provided with the retaining part which is movably mounted, when the retaining part moves, if misoperation (excessive movement) of the retaining part occurs, the retaining part restrains the stroke of the wrench, the main locking function cannot be realized, the two shells cannot be interlocked to a connecting position in practical application, an operator is reminded, and the safety of the wrench is ensured. Therefore, a series of serious potential safety hazards and system faults are avoided.

A bone fixator as disclosed herein includes at least one removable portion, and is particularly suitable for external fixation of the bones of the femur and tibia (knee joint), the tibia to the foot (ankle joint), the lower leg, the lower thigh, or the forearm and hand. Embodiments allow multiaxial, multiplanar movement, as well as procurvatum and recurvatum, on the anatomy to achieve optimal placement. Embodiments of the fixator includes four fixator joints, each of which is articulating with multiple degrees of freedom. Some fixator joint(s) include a linkage bar connectable to a multi-pin clamp having a quick connect mechanism. The multi-pin clamp is configured for fixation to a bone. Other fixator joint(s) may be connected to the multi-pin clamp in a semi-permanent or non-detachable manner. A telescoping rod assembly allows adjustment of the length of the fixator by a single individual.

A styptic harness tourniquet includes a casing with Velcro fastener. The casing contains a sling with windlass rod, and a buckle and a base on which a fixator and a strap are located. The buckle contains at least two holes, and the base contains at least six holes. The strap contains at least one hole. At least one hole of the buckle and at least two holes of the base contain teeth. At least one fixator of the buckle is located on the casing. At least two limiters are located on the fixator of the windlass rod. The holes in the buckle are arranged in at least two rows. At least one strengthening element is connected to the sling for at least one sixth of its length, and at least two protectors are located in the casing on both sides of the base.

The invention belongs to the field of irregular profile measurement, and particularly relates to a holder roundness error detection device and a detection method. In order to conveniently measure the roundness error of a retainer of a wind power bearing, the invention provides a retainer roundness error detection device which comprises a measuring head and at least three positioning pieces arranged on the same circumference corresponding to the guide surface of the retainer at intervals, and the central angles corresponding to arcs corresponding to all the positioning pieces are greater than 180 degrees; each positioning piece is used for being in contact with and movably matched with the guide surface of the retainer, the measuring head is fixedly connected to one positioning piece, and the measuring head is used for being in contact with the guide surface of the retainer so as to be used for measuring the guide surface of the retainer. The invention further provides a holder roundness error detection method adopting the holder roundness error detection device. According to the invention, the holder does not need to be moved to a measuring platform, but the detection device is moved to the holder, so that the roundness error of the holder can be measured conveniently.

A crown cage for a ball bearing includes an annular main portion, pillar portions protruding in an axial direction at predetermined intervals in a circumferential direction from the main portion, and a pocket formed between the adjacent pillar portions and having a spherical concave surface capable of holding a ball. The pillar portion includes a pair of claw portions having tip end portions arranged at intervals therebetween and a connection portion connecting the pair of claw portions. An inlet portion having a width shorter than a diameter of the ball and for inserting the ball is provided between the tip end portions of the two adjacent claw portions constituting the pocket. A distance from an outer circumferential surface of the pocket to a center of the crown cage for a ball bearing is larger than a distance from an outer circumferential surface of the pillar portion to the center.

An easily detachable inner core assembly and surgical instrument using the same, comprising an inner rod assembly and an outer tube assembly, the outer tube assembly comprising a base and a hollow outer tube. The inner rod assembly comprises a first jaw, a second jaw, a first connecting rod, a second connecting rod, a main pin, a retainer ring and a driving rod. The first jaw comprises a first jaw tail, and the second jaw comprises a second jaw tail. The main pin comprises a pin head and a pin flange. The first jaw tail and the second jaw tail are stacked together, and the retainer ring is fixed with the main pin or the second jaw tail, thereby fixing the first and second jaw tails between the pin flange and the retainer ring to form a first rotating pair that can rotate around the main pin. The first jaw tail and the first connecting rod match to form a second rotating pair, and the second jaw tail and the second connecting rod match to form a third rotating pair. The first connecting rod and the driving rod match to form a fourth rotating pair, and the second connecting rod and the driving rod match to form a fifth rotating pair. The inner rod assembly is installed in the outer tube assembly, wherein the main pin shaft matches with the base to form a quick detachable structure.

The invention relates to a reverse toothless planetary roller screw, and belongs to the technical field of roller screws, the reverse toothless planetary roller screw comprises a screw rod, a long nut, a planet carrier assembly and a plurality of rollers, and the periphery of the screw rod is sequentially provided with a front shaft section, an external thread section and a rear shaft section; internal threads are arranged on the inner wall of the nut; each roller comprises a threaded part in the middle and polished shaft parts at the two ends; the thread part of the roller and the external thread section of the lead screw are opposite in rotation direction and equal in lead angle; the planet carrier assembly comprises a middle retainer, and the middle retainer is provided with at least three open grooves used for assembling the pin rollers in the radial direction. By canceling a screw rod gear / ring groove and pin roller gear / ring groove structure and combining a double matching mechanism of the planet carrier assembly, the machining bottleneck of a composite structure is thoroughly eliminated, the axial parallelism and the constant lead characteristic of the pin rollers are guaranteed, meanwhile, vibration noise is remarkably reduced, and high-precision and large-scale mass production is achieved.

The present invention is oral device that inhibits mastication and ingestion of solid food while minimizing intrusiveness and discomfort in other oral activities. This device is ideal for individuals following an all-liquid diet without relying on willpower alone. The oral device allows a full range of motion of the jaw and the wearer keeps the ability to open and close the mouth, allowing all oral functions other than chewing and swallowing solid food. In various embodiments of the invention, the oral device comprises a set of retainers worn over teeth or retainer bars bonded to, or integrated as part of the retainers. A set of flexible mastication barriers coupled to the retainers or retainer bars and extending from mandible to the maxilla on the lingual side of the mouth inhibit the movement of solid food to the occlusal surfaces of the posterior teeth for chewing. An artificial intelligence platform is implemented to improve fabrication of the oral device and predict and eliminate undercuts in the retainers or retainer bars.

A drive-line seal system includes a housing having a bore therein. A shaft is rotatably received in the bore. A slinger is mounted to the shaft and includes a radially outwardly extending surface. An annular retainer is mounted within the bore in the housing. An annular seal body is molded to the retainer and includes a main seal lip and a dust lip extending from an inner end of the annular retainer. The annular seal body further includes an axial seal lip which engages the radially extending surface of the slinger. The axial seal lip includes a plurality of raised pumping features that engage the radially extending surface of the slinger.

The invention discloses a tail end executing assembly matched with a surgical instrument, an initial position maintaining piece and the surgical instrument, and belongs to the field of medical instruments. An end effector assembly of a surgical instrument includes: a proximal body portion defining a longitudinal axis; the far-end execution part is used for manipulating tissues and is pivotally connected to the near-end main body part through a joint assembly, and a pivot shaft is arranged on the joint assembly; the near-end main body part comprises a bending transmission part, a bending driving shaft is arranged on the joint assembly, and the bending transmission part acts on the bending driving shaft to provide bending driving force for the joint assembly, so that the far-end execution part is bent relative to the longitudinal axis of the near-end main body part; and when the tail end execution assembly is located at the to-be-loaded position, the far-end execution part forms an included angle which is not 0 degree relative to the longitudinal axis. The far-end execution part of the surgical instrument can be bent at a large angle.

The invention provides a planetary roller screw transmission assembly. The planetary roller screw transmission assembly comprises a nut, a screw, a plurality of rollers, a retainer group and a friction elastic piece, the nut is provided with an axially penetrating inner hole, and the inner circumferential surface of the nut is provided with at least one annular groove section and at least one non-tooth-shaped section adjacent to the annular groove section. The screw rod is arranged in the inner hole in a penetrating mode and extends out of the nut. A plurality of rollers are arranged in an inner hole of the nut and arranged on the periphery of the screw in a surrounding mode, each roller is provided with at least one large-pitch-diameter section and at least one small-pitch-diameter section with a smooth face in the axial direction, the large-pitch-diameter sections are provided with annular teeth used for being meshed with the screw in a rolling mode, and the small-pitch-diameter sections are provided with annular teeth used for being meshed with the nut in a rolling mode. The retainer group is arranged at the axial end parts of the plurality of rollers. The friction elastic piece is arranged on the non-tooth-shaped section of the inner circumferential face of the nut and makes interference contact with the smooth face of the small-pitch-diameter section of the multiple pin rollers.

The present disclosure provides generally for a therapeutic oral device for assessing one or more health aspects of a user and / or alleviating one or more health conditions of a user, and associated methods for using the device. The device may comprise a hard palate portion, a mouth guard portion, and a tongue retainer portion. The hard palate portion may comprise one or more materials. The hard palate portion may also comprise a composite of materials. The mouth guard portion may comprise one or more components that provide stability and maintain the position of the therapeutic oral device within the mouth of a user. The tongue retainer portion may comprise an airway and a predetermined length. In some embodiments, the therapeutic oral appliance may comprise a mandibular mouth guard portion.

The invention relates to the technical field of universal joints, in particular to a conical rolling body universal joint. The conical rolling body universal joint comprises a shaft sleeve unit and a sealing assembly which are arranged on the cross shaft assembly in a sleeving mode. A containing cavity is defined by the sealing assembly, the shaft sleeve unit and the cross shaft assembly; the holder unit is arranged on the cross shaft assembly in a sleeving mode and located at the end, away from the sealing assembly, of the containing cavity; the rolling assemblies are arranged in the containing cavity and arranged in the circumferential direction of the cross shaft assembly at intervals. The retainer unit is provided with a plurality of retaining grooves at intervals in the circumferential direction of the cross shaft assembly; the small-diameter end of the rolling assembly is located in the retaining groove and abuts against the retainer unit. The elastic assembly is located between the sealing assembly and the rolling assembly and arranged on the cross shaft assembly in a sleeving mode; the large-diameter end of the rolling assembly abuts against the elastic assembly. The interaction force between the rolling assembly and the elastic assembly is larger than zero. The problem of how to ensure the stability of the relative position of the rolling assembly under the conditions of low cost and small space is solved.