126 results about "Retainer" patented technology

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 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 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.

The application discloses a lateral lying pelvis fixator for surgery, which comprises a left extrusion fixing part and a right extrusion fixing part, wherein the left extrusion fixing part and the right extrusion fixing part each comprise a height adjusting rod, a transverse adjusting rod, a connecting rod, an extrusion plate, a pneumatic bidirectional locking mechanism and a control valve; the height adjusting rod, the connecting rod and the transverse adjusting rod each comprise an inner rod and an outer rod, the outer rod is arranged on the outer side of the inner rod, the pneumatic bidirectional locking mechanism is arranged between the inner rod and the outer rod of the height adjusting rod, the connecting rod and the transverse adjusting rod, the outer rod of the connecting rod is vertically fixed at the end of the outer rod of the transverse adjusting rod, the extrusion plate is arranged at the end of the inner rod of the connecting rod, and the control valve controls the closing of the pneumatic bidirectional locking mechanism, so that the locking and releasing actions can be completed by one key, different body types can be adapted, the precise positioning and stable patient lateral lying body position in orthopedic surgery can be ensured, the nerves and blood vessels can be protected from compression, and the efficiency of the surgery is improved.

The article relating to this design is a nasogastric tube fixing device for guiding a nasogastric tube inserted into the nostril to the side of the patient's face and holding it in place. As shown in Reference Figure 3, which illustrates the state of use, the nasogastric tube is fitted into fixing grooves extending from the center of the main body in the left and right directions, and the ends of the main body are attached to the cheek area with fixing tape, so that the nasogastric tube is held in a state that makes it difficult to come off. Also, as shown in Reference Figures 2 and 3, which illustrate the state of use, elongated holes are formed at both ends of the main body, which also serve as retainers, and the device can also be used in a form in which a separate band is connected to these elongated holes and attached around the head. When using the band, it can be fixed without using fixing tape alone, and the device is designed to be easy to use with consideration for skin irritation, and it can also be used to hold the tube securely even when adhesion is difficult due to the shape of the area under the nose, such as when there is a beard or when there are no front teeth.

The torque required for rotation is reduced. [Solution] The nut 44 comprises a nut body 100. The nut body 100 has a female thread 120 and a retainer housing portion 122. The retainer housing portion 122 forms a space. This space communicates with the outside of the nut body 100 at one end and the other end. The retainer housing portion 122 is connected to the female thread 120. One end of the space formed by the retainer housing portion 122 communicates with the outside via the female thread 120. The nut 44 further comprises an annular retainer 102. The retainer 102 is housed in the space such that its central axis 222 is aligned with the spatial axis direction.

A drilling insert includes a body having a first end and a second end opposite the first end. The body also has a cutting head at the second end, a shank positioned at the first end, a shaft extending between the shank and the cutting head, and a groove between the shank and the cutting head. The shank is configured to be received by a tool. The drilling insert further includes a sleeve surrounding the shaft and a sleeve retainer engaging the groove. The sleeve has a flute, and the sleeve retainer is configured to limit axial movement of the sleeve on the shaft.

In some instances, a tethered head assembly of a delivery system includes an inner retainer and an outer retainer defining an orifice comprising a container configured to receive an attachment member of a medical device, a passage, and a recess. The inner retainer is movable within the recess between a second position and a first position, in which the passage is sized to receive the attachment member, and in the first position, the passage is sized to prevent the attachment member from passing through. A tethered handle assembly defines a channel, a force transmitter within the channel, a slidable member partially received at a first end of the channel, and a button partially received at a second end of the channel. A distally directed force applied to the button causes the force transmitter to apply a proximally directed force to the slidable member, thereby moving the slidable member and the attached tether proximally.

A holder for an annuloplasty ring that detaches with one cut. The annuloplasty ring mounts around a periphery of the holder without the use of connecting sutures. The holder has a proximal plate defining a lip on one side of the ring, and a distal retainer that defines a second lip on the other side, the two lips retaining the ring around the holder periphery. The distal retainer is formed by two hinged wings. A truss suture maintains the holder in a trussed configuration while the annuloplasty ring is delivered and secured to the implantation site. Once the ring is secured at the annulus, the truss suture is severed with one cut, enabling the hinged wings to pivot and the holder to be pulled free of the ring.

This utility model discloses a press-fit blind hole nut structure, belonging to the field of press-fit nut technology. It includes a first retainer and a second retainer, a nut component, and a fixing bolt. The fixing bolt is installed at the inner center of the nut component. The nut component includes a toothed sleeve and a nut sleeve. The toothed sleeve is fixedly installed on the upper outer surface of the nut sleeve. A toothed portion for riveting metal plates is provided at the center of the upper outer surface of the toothed sleeve. The toothed portion has an overall toothed ring structure. The fixing bolt and the toothed sleeve, as well as the fixing bolt and the nut sleeve, are all connected by threads. Several sets of teeth are distributed in a ring on the outer surface of the toothed portion, with one end of each tooth having a pointed shape. This provides a press-fit rotation limiting structure, preventing synchronous rotation of the nut during subsequent bolt installation after it is connected to the sheet metal material. This allows the nut and bolt to be tightened to the maximum extent, improving their performance.

This invention discloses a negative pressure structure for a CT positioning head clamp, comprising: a base, a forehead retainer pad on the top of the base, negative pressure mechanisms on both sides of the base, and a swing arm rotatably mounted on the top of each negative pressure mechanism. Each negative pressure mechanism includes a mounting assembly, which is fixedly mounted on one side of the base. A telescopic assembly is movably fitted inside the mounting assembly and engages with an arc-shaped groove. A one-way valve assembly is located inside the telescopic assembly. A connecting assembly is located on the top of the mounting assembly for mounting the swing arm. This invention achieves a stable clamping mechanism based on negative pressure, effectively solving the problems of large clamping force fluctuations, release delays, and operational difficulties in existing friction clamping systems. It offers advantages such as providing stable head fixation, reducing clamping force fluctuations and reset delays, improving CT imaging quality, and enhancing operational convenience.

This invention relates to the field of fracture fixation technology, and more particularly to an inflatable pressure pelvic fracture fixator, comprising an L-shaped plate, an air pump fixedly connected to one side of the L-shaped plate, an air bladder fixedly connected to one side of the L-shaped plate, a rectangular groove formed on one side of the L-shaped plate, and a protrusion fixedly connected to the other side. A retaining strip is fixedly connected to the surface of the protrusion. When a patient with a pelvic fracture needs fixation, the fixator is moved from the patient's sides towards the patient's waist, allowing the L-shaped plate to extend below the patient's waist. The retaining strip on the surface of the protrusion engages with the retaining groove inside the rectangular groove, thus fixing the patient's waist. When the protrusion is inserted into the rectangular groove, a trapezoidal block is compressed into the groove. When the protrusion is fully engaged with the rectangular groove, the trapezoidal block extends out from the groove and penetrates the through groove under the elastic potential energy of the spring, thus fixing the protrusion inside the rectangular groove.

The present application relates to an angular contact ball bearing including a plurality of balls (3) interposed between raceway surfaces (1a, 2a) of an inner ring (1) and an outer ring (2), the balls (3) being held in pockets (Pt) at a plurality of positions in the circumferential direction of a retainer (4) in the shape of a cylinder. Also, the ratio of the inter-ball distance (Pd) obtained by subtracting the diameter (Da) of the ball (3) from the distance (Pc) between the centers of adjacent balls (3, 3) with respect to the diameter (Da) of the ball (3) is 0.16 or more and 0.35 or less. Furthermore, the ratio of the inner ring groove curvature (Ri) obtained by dividing the diameter (Di) of the groove (1g) of the raceway surface (1a) of the inner ring (1) by the diameter (Da) of the ball (3) with respect to the ratio of the outer ring groove curvature (Ro) obtained by dividing the diameter (Do) of the groove (2g) of the raceway surface (2a) of the outer ring (2) by the diameter (Da) of the ball (3) is 0.97 or more and 0.99 or less.

This invention relates to the field of puncture surgery technology and provides a skin fixation device for puncture surgery, comprising: an adhesive component, a ball-and-column clamping component, a ball-and-column, and a needle fixation component. The adhesive component is adhered to the skin surface for fixation by the adhesive's stickiness. The ball-and-column clamping component is connected to the adhesive component and is used to fix the ball-and-column and adjust its direction. The ball-and-column works in conjunction with the ball-and-column clamping component to adjust the direction of the ball joint and support the puncture instrument. The needle fixation component is located at the end of the ball-and-column for effective fixation of the end of the puncture instrument. The spherical design solves the problem of directional adjustability, while the conveniently detachable integrated C-shaped structure removes restrictions on the combination of puncture instruments and the device. The addition of a quick-release structure at the device's own joint fixation point makes the instrument more convenient and flexible to use. This device satisfies the doctor's requirement for quick disassembly and also allows for real-time switching between fixation and adjustability.

This invention belongs to the field of medical devices, specifically a combined internal fixator and fixation method for fixing joints with micro-motion. The combined internal fixator includes a first bone screw and a second bone screw. A movable connecting structure is provided between the connecting ends of the first and second bone screws. The movable connecting structure includes a groove and a shaft. The groove includes an insertion port and a mounting groove communicating with the insertion port. The mounting groove has a semi-circular cross-section. The shaft includes a semi-circular shaft adapted to the mounting groove, which is rotatably accommodated within the mounting groove, allowing the first and second bone screws to rotate relative to each other around a first radial axis. This invention, through a hook-groove sliding self-locking structure, achieves controllable micro-motion and integrated implantation for fixing joints with micro-motion. It has achieved significant technological advancements in preserving joint physiological function, simplifying surgical procedures, avoiding secondary surgeries, and reducing the incidence of complications. It has important clinical application value and is suitable for fixing joints with micro-motion.

A bottom loading fastening system that consists of the polyaxial ball and socket joint used in conjunction with an anchoring bone screw. The system allows attachment of a connector assembly having an offset angular shape for anchoring a connecting rod. The spherical ball connector using a locking ring positioned in a locking ring slot. Upon installation, the locking ring is moved to a ring containment slot to expand a retainer ring, allowing passage of a bone screw spherical ball, the retainer ring forcing the locking ring back to the locking ring slot, thereby permanently attaching the connector assembly to the anchoring bone screw. The offset between the upper and lower sections allows the rod to be received at an angle optimized for spinal alignment, thereby reducing the need for rod contouring and minimizing stress concentration on the spherical joint.

A compact swing clamp device is provided which is durable and compact. A large-diameter hole (6) and a medium-diameter hole (7) are formed in a housing body (2) in series from the lower side in the axial direction. A cylindrical protruding member (3) is inserted into the large-diameter hole (6) in a sealed manner and is screwed to the housing body (2). A key member (22) is inserted between a cylindrical retainer (15) inserted into the medium-diameter hole (7) and the medium-diameter hole (7). The retainer (15) is positioned in the circumferential direction with respect to the housing body (2) by the key member (22).

A tub is provided having a body removably receiving interchangeable mountable structures such as a door proving selectable access to the tub interior. The body has four walls that each can have an opening formed therethrough. A frame with inner and outer pieces is supported on the body and cover the perimeter edge of a tub opening. The frame has barrels at one side and a retainer on the opposite side. The retainer has a lock flange with a lock edge. The mountable structure can have integrated pins at one side and a latch at the opposite side. The latch has a closing element with a latch edge and a release element. The pins can be vertically inserted down into the barrels to attach the mountable structure to the frame. The mountable structure is closed when the latch edge is engaged with the lock edge.

This provides a screw joint configuration that includes a retainer function for screws and also allows for positional adjustment of the two components. [Solution] A screw joint arrangement comprising a first member having one screw receiver, first and second threaded bore portions, a second member having a bore with an unthreaded bore portion separating the threaded bore portions, and a screw shaft having a screw head and a threaded portion. The first member is positioned next to the second member with the first threaded bore portion in close proximity to the first member. The screw joint arrangement can be set between a first state in which the second member is fixed to the first member and a second state in which it is movable by rotation of a screw. In the first state, one of the screw receivers and the bore are aligned and the screw shaft passes through at least one of the screw receivers and extends into the bore with the threaded portion screwed into the second threaded bore portion so that the first member is clamped between the screw head and the second member.

A clamping device includes a shaft body including an axial opening and at least one hole, where the axial opening extends along a first straight line; at least one retainer, where each of the at least one retainer is configured to move within a respective hole of the at least one hole; a sleeve sleeved on the outer circumference of the shaft body and configured to move axially relative to the shaft body; an abutting member abutting against the rear side of the at least one retainer; a first elastic member located on the front side of the at least one retainer; and a second elastic member located on the rear side of the at least one retainer and being in contact with the abutting member. The sleeve includes a protrusion extending along a second straight line, and the protrusion abuts against the shaft body, where the second straight line intersects with the first straight line. Along the direction of the first straight line, the protrusion is located at the front end of the at least one retainer and is not in contact with the at least one retainer.

The utility model provides a kind of sputum aspirator holder, including mounting plate, the top of mounting plate is provided with limit ring, the bottom surface port of limit ring is fixed with inlay ring, it is provided with several support columns between the inlay ring and mounting plate and is fixed by several support columns;Fixed ring is provided in limit ring, the top surface of fixed ring is fixed with sputum aspirator body, and fixed ring is provided with fixed adjusting mechanism between mounting plate. The utility model is cooperated by each structure, not only is convenient for the fixation of sputum aspirator, and simple operation, it is beneficial to promotion.

This utility model belongs to the technical field of denture retainers, specifically relating to a placement box for custom-made denture retainers. It includes a box body with an observation window, a retainer placed inside the box body, a lid at the upper end of the box body, a gasket ring fixedly connected inside the box body, a sealing gasket slidably connected inside the lid, a guide rod fixedly connected to the lower end of the lid, a guide block fixedly connected to the outer side of the guide rod, and a limit bracket fixedly connected inside the sealing gasket. This utility model, by incorporating components such as a sealing gasket, a gasket ring, and a spring, allows the spring force to drive the sealing gasket and gasket ring into contact, effectively increasing the seal between the lid and the box body. This prevents leakage of the retainer fluid and solves the problem of poor sealing and easy leakage of the retainer fluid when storing custom-made denture retainers.

A suturing device for minimally invasive surgery is disclosed. The suturing device has a head defining one or more ferrule holders and a tissue bite area. The device also has a first needle comprising a flywheel portion and one or more curved arms extending from the flywheel portion, each of the one or more curved arms comprising a ferrule engaging tip, wherein the first needle is pivotably coupled to the head. The suturing device further has a first actuator coupled to the first needle and configured to rotate it from a retracted position, where the ferrule engaging tip of each of the one or more curved arms starts away from the one or more ferrule holders, through the tissue bite area, and to an engaged position where the ferrule engaging tip of each of the one or more curved arms is operationally aligned with the one or more ferrule holders.

A wear part and retainer system in combination, for earthmoving and mining equipment, the wear part having a first passage extending therethrough in one direction and a second passage extending in a direction lateral to and intersecting the first passage. The first and second passages each have an outer end and an inner end. A latching member is mounted in the first passage for movement between a non-latching position and a latching position in which it locks the wear part to a mother part. The latching member has a recess therein and a biasing element mounted in the recess. A locking pin is mounted in the second passage for selective movement along the passage between a retracted position in which the latching member is free to move into and out of the recess and an extended position in which it locks the latch in the latching position.

The application relates to a root canal treatment instrument, in particular to a root canal drill and grinding system with an auxiliary positioning guide plate, which is used for root canal treatment of a diseased tooth and comprises a clamping piece, a guide piece, a handset and a bracket type guide plate; the guide piece comprises a guide piece body, a central hole and guide columns; the central hole is arranged at the center of the guide piece body, and the guide columns are symmetrically arranged at the two ends of the guide piece body and take the central hole as the center; a drill needle is arranged on the handset and passes through the central hole; the clamping piece is used for clamping and fixing the guide piece on the handset; the bracket type guide plate comprises a columnar support and a retainer connected to the columnar support; the retainer is wrapped on a fixed tooth to fix the columnar support; the columnar support is symmetrically arranged with guide column insertion slots on the two sides of the diseased tooth, and guide column insertion slot cavities matched with the guide columns are arranged on the guide column insertion slots. Compared with the prior art, the application solves the problems of poor guiding accuracy, small drilling and grinding operation space, high difficulty and narrow discharge channel in the prior art.

This utility model discloses a spring retaining ring for resisting axial impact, including a retaining ring body. The retaining ring body is integrally formed and has an opening. The retaining ring body includes two ends at the opening, and each of the two ends has symmetrically distributed inner and outer mounting grooves. The two end faces of the retaining ring body are respectively set as a flat end and a conical end. This utility model utilizes the conical end to contact and block the workpiece, causing the workpiece to generate an axial thrust, which is uniformly radially dispersed by the conical end. This not only makes the force on the retaining ring body more uniform, but also, because the conical end uniformly disperses the axial force radially, a portion of the axial force on the retaining ring body is deflected and dispersed radially towards the hole wall. This improves the axial impact resistance when used as a retaining ring for holes, thus achieving the advantages of a device with stronger overall axial impact resistance and dual-purpose functionality.

This utility model provides a clamping device for slender tubes with a large length-to-diameter ratio, belonging to the field of machining technology. The clamping device includes a clamping body, the right side of which is connected to an elastic clamping cone. A rolling element retainer passes through the elastic clamping cone, and the rolling element retainer has an elongated hole containing a rolling column. A clamping nut is threaded to the outer surface of the clamping body. The left side of the clamping body passes through a needle roller bearing, and the other end of the needle roller bearing is located within a limiting sleeve. By using clamping bolts, this utility model allows the rolling body to move and clamp the tube when the clamping nut is tightened, facilitating clamping or limiting the tube and preventing it from jumping during processing, thus affecting the processing accuracy. By using guide columns, the limiting sleeve can be limited, allowing the limiting sleeve to move stably and preventing deviation during movement.

This invention discloses a tube fixation device for thoracic surgery nursing, belonging to the field of medical devices. It includes a base, a positioning cylinder, a drainage tube, a control plate, and clamping blocks. The positioning cylinder is located on top of the base, the drainage tube passes through the base and the inner side of the positioning cylinder, the control plate is located inside the positioning cylinder, and the clamping blocks are arranged in a circumferential array inside the control plate. This invention can assist in thoracic cavity decompression, adapt to the gas expulsion trend and dynamically adjust to pressure changes, while simultaneously strengthening tube fixation to prevent secondary injury to the patient.