706 results about "Retainer" patented technology

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.

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.

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 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 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 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.

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 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.

Disclosed are systems and methods for retaining system coupling a first panel to a second panel via a retainer. The retainer comprises a body portion, a pair of flanges, a plurality of wings, and one or more retaining tabs. The body portion may employed a pair of legs that are spaced apart and flexibly connected to one another at a first end to define a channel. The channel is configured to receive and / or engage a bezel associated with the first panel. The pair of flanges are connected to and extends outwardly from a second end of its respective leg. The plurality of wings are coupled to the pair of legs and canted outwardly from the body portion. The plurality of wings are configured to engaged, for example, a retaining ledge of the second panel when the bezel is inserted in the channel. The one or more retaining tabs extending inwardly from one of the pair of legs and engage the bezel.

The invention relates to the technical field of children oral medicine and digital oral cavity restoration, and discloses a preparation method of a 3D printed ceramic resin gap retainer, which comprises the following steps: scanning the oral cavity of a child patient at a speed of 15-20 frames per second by using an oral cavity digital impression instrument, obtaining an intraoral three-dimensional digital model containing an odontoprisis space and adjacent abutment teeth, and generating an STL file; the STL file is imported into Exocad Dental CAD software, an adhesive space of 0.1-0.2 mm is reserved for filling an undercut, and a bridge body structure is designed after an in-position track is determined; photocuring ceramic resin is selected, and printing is conducted in a curing printer with a 405 nm light source, the exposure time of 2.5-3.5 s / layer and the layer thickness of 0.05 mm. The preparation method of the 3D printed ceramic resin gap retainer aims to solve the problems that in the traditional gap retainer manufacturing process, a child patient fetches a mold uncomfortably, and a finished belt ring is poor in fitting degree and large in error.

The present application proposes a sternum internal fixator made of a shape memory alloy, comprising: a fixing plate (1) which has a sheet shape extending in a first direction (W) and a second direction (L) which are perpendicular to each other, is bent toward the inner surface side thereof in the first direction (W) within a body temperature range, and is used for fitting a sternum; a plurality of embracing arms (3) which extend from the two ends of the fixing plate in the first direction, are bent towards the inner surface side in an arc shape within the body temperature range, and are used for embracing the sternum between adjacent ribs; the fixing arms (2) extend from the two ends, in the second direction (L), of the fixing plate respectively, each fixing arm comprises a first section (21) and a second section (22), in the body temperature range, the first sections extend continuously with the fixing plate (1), and the second sections are connected with the first sections and bent by more than 90 degrees relative to the first sections.

Lifting and sliding structure to compensate for the water pressure force acting on the shower head, comprising: a rod (1); a retainer (2) arranged on the rod (1); a sliding block (3) which is guided on the rod (1) and arranged above the retainer (2); a telescopic water conduit structure (4) arranged between the retainer (2) and the sliding block (3); a sliding tube (5) guided on the rod (1) and arranged above the sliding block (3); and a support device (6) arranged on the rod (1), wherein the support device (6) comprises a fixed cylinder (7) attached to the retainer (2), a piston (8) guided in a sealing-sliding manner on the inner wall of the fixed cylinder (7), a sealing cover (9) attached to the upper opening of the fixed cylinder (7) and a movement tube (10) arranged between the piston (8) and the sliding block (3) and passing through the sealing cover (9) in a sealing-sliding manner, wherein the piston (8) divides the interior of the fixed cylinder (7) into an upper chamber (11) and a lower chamber (12); wherein a three-way water channel (13) is formed in the sliding block (3), the three ends of which are each connected to the outlet of the telescopic water conduit structure (4), to the inlet of the sliding tube (5) and to the upper end section of the movement tube (10); and wherein a flow opening (14) is provided on the side wall of the lower end section of the motion tube (10), through which the interior of the motion tube (10) is fluidically connected to the upper chamber (11).

The utility model relates to the technical field of joint fixation, in particular to a venipuncture joint fixator which comprises a first fixing frame and a second fixing frame rotationally installed on one side of the first fixing frame, a support is fixedly installed at the bottom of the first fixing frame, and two sets of supporting rods are rotationally installed at the bottom of the second fixing frame. Driving pieces are arranged at the ends, away from the second fixing frame, of the two supporting rods, the second fixing frame can be driven to rotate through the driving pieces, and the driving pieces are further arranged at the top of the support; the first fixing frame and the second fixing part are arranged on the support, the punctured limb part of a patient can be fixed through the elastic bands and the elastic gaskets, and then the two supporting rods are driven to rotate through the arranged driving part, so that the second fixing frame is driven to rotate, and then the joint part of the patient is driven to bend and rotate; and in the bending process, the bending state can be fixed, operation and use are simpler and more convenient, and the actual treatment effect can be further improved correspondingly.

This invention relates to the field of medical device technology and discloses a surgical sternal closure fixator, comprising a main body, a male hook plate at one end of the main body, and a fixing mechanism on the main body. The fixing mechanism includes a flexible plug and a female hook plate. The flexible plug is located inside the main body, and the female hook plate is connected to the end of the flexible plug away from the male hook plate. The fixing mechanism includes a sliding mechanism, which includes a female hook plate located on the inner wall of the female hook plate facing the male hook plate, with one end of the female hook plate inserted into the flexible plug. The flexible plug contains an auxiliary mechanism and a rotating mechanism, the auxiliary mechanism being connected to the rotating mechanism. A wobbling mechanism is provided on the side wall of the female hook plate facing the male hook plate. This invention can adjust the gripping force and gripping position according to the expansion and contraction of the sternum during the patient's breathing, reducing local misfitting between the fixator and the sternum, which affects the stability of sternal fixation and improving stability.

The utility model discloses a zipper retainer and a zipper assembly, and relates to the field of clothes. A zipper stopper includes: a stopper body; the retainer body is provided with a containing cavity, and the containing cavity at least penetrates through the retainer body in the first direction. A first clamping opening capable of expanding or contracting in the first direction is formed in the side, in the second direction, of the retainer body, and the first clamping opening communicates with the containing cavity and penetrates through the cavity walls on the two sides of the containing cavity in the third direction. The first direction, the second direction and the third direction are perpendicular to each other. The problems that the moving range of the pull head cannot be adjusted and the pull head cannot be detached and replaced can be solved.

A fastening element (1) comprises a floating nut (2), a cage (3) intended to be fastened to a support, and a retainer (4) secured to the cage (3). The retainer (4) is mounted on the cage (3) such that it can rotate between a stop position in which the floating nut (2) can be fastened to the cage (3) and an open position in which the nut (2) can be mounted or removed.

The utility model discloses a modularized pelvis fixator, relates to the technical field of medical instruments, and solves the problem that secondary injury is caused to a patient due to the fact that a connecting rod and a bone traction needle possibly interfere with each other when the number of operation parts is too large in the prior art. The main mounting seat is arranged on the outer trapezoidal supporting frame and used for mounting and locking the connecting rod, more straight line sections can be conveniently connected with the locking block through the outer trapezoidal supporting frame, meanwhile, the trapezoidal structure avoids shielding of an operation space in an operation, and better applicability is achieved; the outer trapezoid supporting frame has the advantages that the fixing rod scheme combination is more visual and convenient, meanwhile, the straight line section and the locking block can be connected more stably, the problem of unstable connection of the arc section is avoided, the inner rectangular supporting frame is adopted on the inner side, the inner operable space is larger, and operation in the operation is facilitated.

A delivery system for an implantable device includes an elongate member and a main body coupled to the elongate member. The main body has a main body wall defining a main body lumen and a side branch portal through the main body wall. A guide member extends along at least a portion of the elongate member, into the main body lumen, and through the side branch portal. A guide member retainer assembly includes a retainer coupled to the guide member and defining a retainer eyelet. A release wire extends through a portion of the main body wall and the retainer eyelet to engage the retainer eyelet, restricting the guide member from being retracted along the elongate member by the engagement between the release wire and the retainer eyelet.

This invention relates to the field of orthopedic surgical risk assessment, and in particular to a method and system for orthopedic surgical risk assessment. By acquiring preoperative and intraoperative data of a patient's orthopedic surgery, the method preprocesses the preoperative and intraoperative data, extracts the spatial features of bone microstructure from the initial orthopedic surgical data using a cascaded feature extraction network, calculates the correlation weights between imaging data and biological signals through a cross-modal attention mechanism, and constructs a patient-specific bone model based on finite element analysis to simulate the characteristic orthopedic surgical data in real time. The method simulates the distribution of joint contact stress at different osteotomy angles, the impact of micromotion thresholds at the bone implant interface and hemodynamic changes on the bone healing microenvironment after internal fixation device implantation, significantly reducing complications caused by improper operation and improving the surgical success rate.

The utility model relates to the technical field of pelvic fixator, concretely is a hard pelvic fixator, including first reinforcing shell and second reinforcing shell, the outer surface of first reinforcing shell installs first clamping band, the outer surface of second reinforcing shell installs second clamping band, the surface one side of first reinforcing shell installs locking assembly, the front surface of first reinforcing shell and second reinforcing shell all installs support assembly, the back of second clamping band installs reinforcing assembly. The utility model discloses locking assembly and the cooperation of support assembly can make the support of patient fixed, lock the back of patient fast, and therefore through adjustable locking assembly and support assembly can fast the pelvic of patient is fixed.

The invention discloses a cement retaining device, which relates to the technical field of petroleum drilling, and comprises an upper joint, a long central pipe and a sealing sleeve, a piston is fixed through a setting shear pin and is hydraulically driven to act; the lower end of the piston is connected with an elastic claw and can transmit setting force and achieve releasing separation, and the lower portion of the piston is connected with a compression cylinder and an upper conical head in series through a claw connector. The anchoring mechanism is composed of an upper conical head, a lower conical head, an anchor tooth block and the like and can expand in the radial direction to clamp the casing pipe during setting. The compression sleeve linked with the rubber sleeve assembly can extrude the rubber sleeve assembly to realize sealing; the cement injection channel is composed of a lower connector, a one-way valve and a cement injection head and ensures one-way cement injection. The design that an unblocking fishing head, a thrust ring and inner teeth of a compression cylinder are meshed is adopted in the unblocking mechanism, the thrust ring can be retracted by lifting the fishing head upwards, and therefore anchoring and sealing are relieved. Setting, squeezing and sealing, cement injection and fishing operation are achieved through one pipe column, a large-drift-diameter cement injection channel is provided after releasing, finally, the whole body is fished out of a well, no fish is left at the bottom of the well, drilling and grinding are not needed, and construction operation and well plugging cost is saved.

The utility model discloses an auxiliary device for bonding and positioning a lingual retainer, and relates to the technical field of medical instruments. The tongue side retainer bonding and positioning auxiliary device comprises a supporting body, and a bonding mechanism and a guide mechanism are arranged on the outer wall of the supporting body; the bonding mechanism is located on the outer wall of the guide mechanism; the bonding mechanism comprises a bonding part and an adjusting part; the bonding part comprises a bonding frame and a pressing block, and the adjusting part comprises a connecting frame and a fixing frame; the device has the technical effects that the bonding mechanism can flexibly adjust the bonding position according to the individual difference of the oral cavity of a patient through the connecting frame, the control block, the adjusting plate, the bonding frame and other parts which can be adjusted in a sliding manner, the position is ensured to be accurate and stable through fixation of the bolt and the extrusion ring, and operation in the oral cavity is convenient through cooperation with the control frame; and by means of the first spring and the first damper, automatic resetting after bonding is achieved, and adaptability, accuracy, operation convenience and working efficiency of bonding positioning are greatly improved.

The utility model relates to the technical field of bearings, in particular to an anti-loosening retainer structure which comprises a retainer body, and an anti-loosening mechanism is arranged in the retainer body. The anti-disengaging mechanism comprises a rotating shaft rotationally connected to the interior of the retainer body, a positioning pin is slidably connected to the center of the interior of the rotating shaft, a clamping block is fixedly connected to the outer wall of the positioning pin and located in the retainer body, and a fixing pin is slidably connected to the position, away from the positioning pin, of the outer wall of the clamping block. A volute spiral spring is fixedly connected to the outer wall of the rotating shaft and located in the retainer body, an anti-disengaging block is fixedly connected to the outer wall of the rotating shaft and located outside the retainer body, and a traction rope is fixedly connected to the outer wall of the positioning pin and located outside the rotating shaft. The retainer body is prevented from falling off by utilizing the anti-falling mechanism in the device, so that the problem that the existing retainer slides in the bearing and is easy to loosen is solved.

The invention relates to a fixing system for fixing a wear element (16) in a nose (19) of a support element of an earthmoving machine by means of a pin (7) which is accommodated in an opening of the wear element and in an opening (25) in the nose which is coaxial with the opening of the wear element. The system comprises a retaining piece (1) which is a sheet of material which has a flexible flange (3) which extends towards the path of the pin when it is introduced into the opening, blocking said path. The retaining piece is fixed to the wear element or to the nose. The flange is bent towards the direction of the pin when it is introduced into the opening. The pin has a blocking section (13) which has a step which is oriented such that the flange abuts against the step when the pin is attempted to be removed. In order to remove the pin, the pin must be rotated about its axis until the flange leaves the step and is arranged in a section in which the side surface of the pin extends continuously up to the terminal end (10) of the pin.

An orthopedic fixation system includes an implant transitionable between a natural shape and an insertion shape and an implant retainer. The implant includes a plate segment, a blade segment extending from the plate segment, a transition section within the blade segment, and a retainer receiver traversing the transition section. The transition section deforms to move the implant between the natural shape and the insertion shape. The implant retainer, upon transition of the implant from the natural shape to the insertion shape, engages the implant at the retainer receiver. The implant retainer upon engagement with the implant spans the transition section such that the implant retainer constrains the implant and holds the implant in the insertion shape thereby preventing a transition of the implant from the insertion shape to the natural shape.

This ball bearing is provided with: an inner ring (1), either of which is a rotating ring or an outer ring (2), which is a non-rotating ring; a plurality of balls (3) disposed between the inner ring (1) and the outer ring (2) so as to be rollable; a holder (4) having an opening at one axial end of each pocket (41) that holds each of the plurality of balls (3); a shield plate (50) that closes the space between the inner ring (1) and the outer ring (2) at both axial ends; and grease (6) sealed in a space (8) surrounded by the inner ring (1), the outer ring (2), the balls (3), and the shield plate (50). When the grease (6) is initially sealed, the grease (6) is in contact with the balls (3) and is separated from the retainer (4) on the opening side of the retainer (4) in the space (8).

The present invention relates to an elastic external fixator system (1) for distracting a first bone (3) from a second bone (5) of the body (C) of a patient (P), comprising: - a first pin (7), - a second pin (9), and - a pair of fixators (11), each fixator (11) being held respectively by one end of the first pin (7) and by one end of the second pin (9), each fixator (11) comprising a first portion (21) having a first through hole and a second portion (22) having at least one series of second through holes, the first portion (21) being made of a first elastomeric material, the second portion (22) being made of a second material having a greater hardness than the first material. The invention also relates to an assembly comprising such a system (1) and a drilling guide. Figure for the abstract: Fig. 1