1662 results about "Screw head" patented technology

An intraosseous system and methods for accessing a medullary cavity. The intraosseous system can include an access assembly and an advancement assembly. The access assembly can include an obturator assembly coupled to a needle assembly. The advancement assembly can include a housing having an inner wall and a drive screw coupled to an energy source. The drive screw can include a threaded portion extending from a drive screw head. The threaded portion can extend into the housing. The advancement assembly can further include an advancement nut threadably engaged with the threaded portion of the drive screw. The advancement nut can include an outer surface configured to slide along the inner wall a predetermined distance without rotating. The advancement assembly can further include a socket configured for attachment to the access assembly.

A method can comprise deploying a prosthetic valve with a delivery apparatus, where the prosthetic valve comprises a frame and a rotatable screw connected to the frame, and where the screw comprises a screw head having an annular bore with internal threads. The delivery apparatus is releasably coupled to the screw and can comprise a first shaft and a first head disposed at an end of the first shaft, the first head comprising external threads releasably engaged with the internal threads of the screw head, and a second shaft that is coaxial with and surrounds the first shaft, the second shaft comprising a second head disposed at an end of the second shaft, the second head releasably engaged with an exterior surface of the screw head. Deploying the valve includes radially expanding the prosthetic valve by rotating the screw with the delivery apparatus.

To prevent a failure of a game machine from occurring.SOLUTION: A game machine includes an outer frame fixed to a game island, a front frame openably / closably attached to the outer frame and provided with an opening, an inner frame openably / closably attached to the front frame and openably / closably attached to the outer frame, a game board detachably attached to the inner frame and formed with a game area visible through the opening, and a unit part attached in front of the game board. The unit part is formed a roll-down surface on which a game ball rolls down, an inclination part connecting the roll-down surface and the game area, and a through hole for inserting a screw at a predetermined position on the roll-down surface. The unit part is fixed to the game board by inserting the screw from a front side of the roll-down surface through the through hole and screwing the screw on a front side of the game board. A game ball rolling down the roll-down surface may contact with a head of the screw.SELECTED DRAWING: Figure 73

The invention relates to the technical field of floor heating, and discloses an assembly type prefabricated floor heating module which comprises an upper prefabricated slab and a lower prefabricated slab matched with the upper prefabricated slab, second connecting strips are embedded into the left end and the right end of the upper prefabricated slab and the left end and the right end of the lower prefabricated slab, and first connecting strips are embedded into the front end and the rear end of the upper prefabricated slab and the front end and the rear end of the lower prefabricated slab. The first connecting strip comprises a square pipe, and a lead screw is arranged in the square pipe. The first connecting strip and the second connecting strip are embedded between the upper prefabricated slab and the lower prefabricated slab which are adjacent to each other, and are meshed in the splicing screw holes in the upper prefabricated slab and the lower prefabricated slab through the screw heads on the first connecting strip and the second connecting strip, so that the prefabricated floor heating modules are spliced together; after the prefabricated floor heating module is laid, the first connecting strip and the second connecting strip cannot be seen from the outside, only one hole needs to be formed between every two adjacent upper prefabricated plates, and therefore the neatness and attractiveness of the prefabricated floor heating module are guaranteed.

A bit holder for holding and driving a screw with a screw head into a fastening base, comprising a clamping region for connecting the bit holder to a driving tool and a bit receptacle for inserting a bit suitable for driving the screw. The bit holder has at least one magnet arranged eccentrically relative to the bit holder with one pole facing the screw head. The at least one magnet is held floating on a magnet holder in relation to a bit held in the bit receptacle, so that the pole face of the magnet can align according to the contour of the screw head in order to hold the screw on the bit holder in such a way that the bit engages torque-locked in a rotary driver contour of the screw head.

The utility model relates to the field of steel box girder high-strength bolt operation, in particular to a multi-degree-of-freedom bolt screwing device which is used for being arranged on a multi-shaft moving support of a high-strength bolt automatic screwing machine so as to execute the bolt screwing action according to a received instruction. The multi-degree-of-freedom bolt screwing device comprises a screwing head main body, a transverse movement driving part and a connecting part, wherein the connecting part comprises a connecting frame, a central rotating shaft, a swinging group and a rotating group. The screwing head main body realizes translation through the movement of the transverse movement driving part; the central rotating shaft supports the screwing head main body to rotate; the swinging group drives the screwing head to radially swing around the central shaft; and the rotating group drives the rotating shaft to rotate or revolve. The integrated design endows the device with the multi-degree-of-freedom movement capacity of translation, rotation, swing and revolution, the capacity of automatically screwing bolts in different directions, angles or shielding positions in a complex space is greatly improved, and the device can be matched with machine vision intelligent recognition and automatic posture adjustment to ensure that the screwing action is rapid and accurate.

The invention discloses motor assembling equipment and an automobile motor assembling method capable of automatically screwing, and relates to the field of motor assembly.The motor assembling equipment comprises a feeding module and a screwing module, the screwing module comprises a mounting plate and a plurality of screwing assemblies, the screwing assemblies are all mounted on the mounting plate, and the screwing assemblies can vertically move; the screwing assembly comprises a screwing head, a screwing bit and a transmission rod, the transmission rod can drive the screwing bit to rotate, the feeding module can convey a screw into the screwing head, and after the screwing head descends to abut against a workpiece, the transmission rod descends and rotates in the screwing head. The position of the mounting block can be adjusted on the plane of the mounting plate, so that the flexibility of the equipment is greatly enhanced, the equipment can adapt to the change of screw hole spacing on workpieces with different specifications, the connecting rod is connected with the transmission rod through the universal joint, and even if the position of the transmission rod is changed due to the movement of the screwing head, the transmission rod can be fixed. And the rotating power can still be effectively transmitted to the transmission rod, so that the screwing function is ensured to be realized.

This invention relates to a treatment device suitable for combined operative procedure of vertebroplasty and pediculoplasty. A treatment device includes a cylindrical driver capable of driving a screw into bone, an inner sleeve capable of being inserted into the driver, and a guide pin capable of being inserted into the inner sleeve, and is configured as follows. The screw includes on an outer wall (outer circumference) a thread that can tap into bone or cement, and a through hole that allows the inner sleeve to pass from a head to a tip. The driver can fit onto the head of the screw and when moved along the central axis and be joined to the screw, so as to transmit torque about the central axis to the screw. The inner sleeve includes a notch which protrudes, when the inner sleeve is inserted from the distal end of the driver in a state in which the screw and the driver are joined together, protrudes more proximally than a tip of the screw, preventing removal of the screw.

A screw with an improved screw head is provided. The screw may include a shank in between a head and a tip. The head may include a plurality of protrusions provided radially along the head. Each of the plurality of protrusions may include a protrusion wall, a leading wall, a trailing wall, and a bottom wall; the trailing wall may include one single trailing surface, the leading wall may include a plurality of leading surfaces, and the bottom wall may include at least one bottom surface.

To provide a lens device that suppresses performance variation caused by positional changes of an optical element accompanying attachment / detachment of an optical element unit, and ensures replacement workability of the optical element unit.SOLUTION: In a lens device 1 in which an optical unit 100 having a second optical element 2 is attachable to and detachable from a base lens barrel unit 200 having a first optical element 1000, the optical unit 100 includes: a fixing screw 3 that fixes the base lens barrel unit 200 and the optical unit 100; a screw accommodating portion 101 that accommodates the fixing screw 3; and a fixing screw operation hole 13b communicating with the screw accommodating portion 101. A depth of a spot-facing portion 19a provided in the screw accommodating portion 101 is shorter than a total length of the fixing screw 3, and an inner diameter of the fixing screw operation hole 13b is smaller than a diameter of a screw head of the fixing screw 3.SELECTED DRAWING: Figure 4

A safety device is disclosed, consisting of a screw body with a screw head, which is connected to the screw body in one piece and forms a rotary-drive part, and with a thread, which is connected to the screw head in one piece and forms a securing part, and also with a rupture device, which is arranged in a channel of the screw body, wherein a sight glass is accommodated entirely within the channel of the screw body, together with the rupture device, and forms an inspecting device for assessing the state of the rupture device.

A bone fixation system for reconstruction and / or trauma treatment of bones, the bone fixation plate comprising: a bone fixation plate configured and dimensioned for application to a patient's bone, the bone fixation plate comprising an in-use upper surface and an in-use lower surface with at least one opening formed on the upper and lower surfaces to form a passage extending from the upper surface to the lower surface; each passage being defined by inner walls extending from the upper surface to the lower surface, the inner walls having a height extending between the upper surface and the lower surface, the inner wall further comprising: a threaded inner wall portion extending from the upper surface towards the lower surface, the threaded inner wall portion having threads with a thread pitch (PW); and a non-threaded lower inner wall portion extending from a lower part of the threaded inner wall portion towards the lower surface of the bone fixation plate; and at least one bone screw with a threaded screw head having threads with a thread pitch (PH) for engaging and interfacing with the threaded inner wall for variable angle anchoring of the threaded screw head during use.

The invention provides a production process of a high-low tooth screw, relates to the technical field of screw production, and solves the problems of poor skid resistance, low fastening efficiency, unbalanced mechanical properties, insufficient corrosion resistance and the like of a traditional screw through innovative design and process optimization. SCM435 alloy steel is selected, spaced anti-skid teeth are pressed within the range of 270 degrees in the circumferential direction of the head of the screw through a four-station cold header, high-low alternating tooth forms are twisted on the rod portion, the gradient hardness of the surface and the core portion is achieved through isothermal quenching, surface treatment is combined with zinc-nickel alloy electroplating and a polytetrafluoroethylene coating, and the corrosion resistance and the assembly smoothness are improved; full-process intelligent detection is realized through machine vision, three-coordinate measurement and torsion test. The local layout of the anti-skid teeth reduces material consumption and improves meshing efficiency, the high-low tooth form reduces assembly torque and stabilizes pre-tightening force, gradient heat treatment enhances fatigue resistance, the composite coating improves corrosion resistance, and intelligent detection guarantees product consistency.

The utility model discloses a hexagonal flange wood screw head height measuring device, which belongs to the technical field of measuring devices and comprises a bottom plate, a groove body is mounted at the right end of the top of the bottom plate, positioning assemblies are arranged on two sides of the groove body, a screw body is placed between the two positioning assemblies, and a vertical plate is mounted at the left end of the top of the bottom plate. A second electric push rod is mounted at the end, away from the lifting assembly, of the mounting plate, a movable plate is mounted at the output end of the second electric push rod, and a measuring assembly is arranged on the side, close to the screw body, of the movable plate. According to the utility model, through cooperative arrangement of the slide rails, the pulleys, the convex teeth, the positioning plates and the first electric push rod, the first electric push rod stretches out and draws back to drive the positioning plates to move left and right, so that a screw body can be clamped and fixed through the two groups of positioning plates, and the screw body is more stable in the measurement process and does not need to be held by a worker.

Variations on improved pedicle screw coupling assemblies, along with methods for use of such assemblies provide improved functional characteristics over existing devices. A coupling assembly is capable of providing rigid fixed attachment between a pedicle screw fully seated to underlying bone and a member extending between adjacent pedicle screws. The coupling assembly includes a pedicle screw having a threaded shaft and a head portion. The head portion includes a driving feature and a proximally oriented bore having a bore diameter. In one version, the coupling assembly includes a member adapted to extend between adjacent pedicle screws. The member includes a protrusion adapted for insertion into the bore of the pedicle screw, the protrusion having a protrusion diameter that is larger than the bore of the pedicle screw head portion. In another version, the coupling assembly includes a spherical bore in the screw head. Additional implementations are described.

The utility model discloses a pelvic brittle fracture bionic hollow screw manufactured based on the 3D printing technology. The pelvic brittle fracture bionic hollow screw manufactured based on the 3D printing technology comprises a screw body, and the screw body comprises a screw tail, a supporting part and a screw head; a thread, a diversion trench and a microporous structure are arranged on the supporting part; the micropore structure comprises a plurality of point position sets spirally arranged on the supporting part, and the difference between every two adjacent point position sets is one fourth of the circumference. According to the pelvic brittle fracture bionic hollow screw manufactured based on the 3D printing technology, the screw body manufactured through the D printing technology is arranged, a micro-pore structure distributed in a topological configuration mode can be conveniently arranged on the screw body, bone cement can be conveniently spread around the screw body in a more dispersed mode through the micro-pore structure, and therefore the bone cement can be more evenly distributed on the periphery of the screw body. And the micropore structure is beneficial to bone tissue growth, so that the long-term stability of the screw is improved.

The utility model discloses an anti-loosening screw fastening structure easy to manufacture in batches, a plate and a seat are locked through a screw, and the screw comprises a screw head and a screw rod; the top surface of the plate is provided with a round countersink, the bottom of the round countersink is provided with a threaded through hole, and the top surface of the seat is provided with a threaded countersink; an elastic special-shaped gasket is pressed between the bottom surface of the screw head and the bottom surface of the round countersink, and a plurality of anti-skid teeth are rotationally and symmetrically distributed on the bottom surface of the screw head; a positioning groove is formed in the wall face of the round countersunk opening, and a positioning block is arranged on the outer ring of the elastic special-shaped gasket. The elastic special-shaped gasket is a second special-shaped gasket, at least one radial slot is formed in the circumferential face of the second special-shaped gasket in the radial direction of the gasket, and a circumferential slot is formed in the side, in the circumferential direction of the gasket, of the radial slot from the bottom, relatively close to the circle center of the gasket, of the radial slot. Strip-shaped parts separated by L-shaped open seams formed by the radial open seams and the circumferential open seams form elastic warped pieces; the second special-shaped gasket is formed through one-time punch forming of an equal-thickness plate. The cost is low.

The invention provides a single-line lumbar intervertebral disc fibrous ring crevasse suture needle, and belongs to the technical field of medical instruments. According to the suture needle instrument, firstly, through the design that the screw sleeve rod is matched with the screw head, the suture needle sleeve is matched with the suture needle and then the two ends of the suture are fixedly connected to the screw head and the suture needle respectively, when medical staff use the needle instrument, firstly, the screw head is placed into the bone surface on one side of a fibrous ring crevasse, and then the screw head is separated from the screw sleeve rod in the axial direction; then, a suture needle penetrates from one side of the fiber ring crevasse to the other side of the fiber ring crevasse, and suture of the fiber ring crevasse is completed; compared with a suture needle which uses two sutures and the suture fixedly connected with the screw head needs to be knotted with a slipknot, the single-line lumbar intervertebral disc fibrous ring crevasse suture needle has the advantages that the operation is simpler, the suture is firmer, and the problems that in the prior art, the suture needle needs two sutures to be knotted and fixed, and the suture needle is inconvenient to use are solved. The operation is inconvenient; and the cut of the sewed fiber ring is easy to crack again.

The invention provides a self-drilling screw structure and a manufacturing method thereof, wherein the manufacturing method includes: providing screw body, forming drill tail screw rod section, forming concave neck portion, forming drill tail cutting edge and forming thread. The self-drilling screw structure including a screw head portion and a screw rod portion, the screw rod portion is sequentially provided with a threaded screw rod section, a drill tail screw rod section and a drill bit screw rod section, the drill tail screw rod section has a rod diameter of drill tail, a plurality of drill tail cutting edges and a plurality of drill tail chip discharge grooves, the drill bit screw rod section is provided with a concave neck portion, and the drill bit screw rod section is protruded to form a plurality of drill bit cutting edges and the plurality of drill bit chip discharge grooves.

Implantable devices and assemblies that provide a friction fit between a receiver and a fastener, such as a bone screw. A frictional force is applied between the screw head and both a retention ring and a pressure insert, maintaining and stabilizing the orientation of the receiver relative to the screw head before being fixed by a set screw. This mechanism prevents drooping or slipping of the receiver out of alignment when implanted. Additionally, the devices allow for modular assembly before or during spinal fixation, enabling bottom-side loading of the screw head into the receiver. Various screws with different characteristics can be coupled to the receiver body before or after implantation. The frictional force may be facilitated by one or more ridges on the receiver body that engage the pressure insert, which is resiliently urged against the screw head, providing a spring-like compression force.

The invention provides a reverse osmosis pressure vessel end cover dismounting device, and relates to the technical field of water treatment equipment.The reverse osmosis pressure vessel end cover dismounting device comprises a supporting plate and a pull rod, a through hole is formed in the middle of the interior of the supporting plate, the pull rod movably penetrates through the through hole, a thread head is arranged at the lower end of the pull rod, and a first thread is arranged on the outer side of the thread head; a second thread is arranged on the outer side of the pull rod, a nut is mounted on the outer side of the pull rod through the second thread, and a gasket is movably arranged on the outer side of the pull rod below the nut; according to the structure of the end cover, the screw head with the first thread is in threaded connection with the central groove of the end cover, the supporting plate is limited on the opening of the pressure container, the handle is rotated to drive the nut to rotate, and the thread drives the pull rod to move upwards through the matching effect of the nut and the second thread of the pull rod; the whole process is labor-saving and efficient, the operation is convenient, and the end cover is not damaged.

The utility model relates to the technical field of riveting, and discloses an FDS hot melting drill screw which comprises a screw body, a screw head and a screw cap, and the five-pointed star design of the screw cap can be more stably matched with a bit to smoothly drill the FDS hot melting drill screw into a plate. Meanwhile, when the screw is drilled into a plate, no waste material flies out, and breakage caused by inclination of the screw is avoided; the free end of the screw body is designed to be in a full triangular streamline shape, so that the free end of the screw is firstly drilled into a plate to play a pre-positioning role; due to the design of the annular groove below the screw head, in the screw drilling process, the plate is turned up in the direction opposite to the screw drilling direction and can be absorbed and covered by the groove space below the screw head.

The utility model provides automatic fastening equipment for a beer spear of a beer barrel, which comprises a rack, a beer barrel conveying belt is arranged on the rack along the horizontal direction, a plurality of groups of beer barrel fixing devices are arranged along the beer barrel conveying belt, and each beer barrel fixing device comprises clamping arms arranged on the left side and the right side of the beer barrel conveying belt. A beer barrel fixing device is arranged on the beer barrel conveying belt, a beer spear fastening device is arranged above the beer barrel conveying belt and comprises a lifting mechanism, screwing heads corresponding to the beer barrel fixing devices in position are arranged on the lifting mechanism, the screwing heads can rotate in the axial direction, horn-shaped openings are formed in the lower ends of the screwing heads, and automatic barrel blocking devices are arranged behind the beer barrel fixing devices. According to the automatic fastening equipment for the beer spear, under the condition that a beer barrel conveying line continuously runs, barrel blocking and beer barrel positioning and fixing can be automatically conducted, the screwing head and the beer spear rotate through friction force to fasten the beer spear, the automatic fastening equipment is suitable for assembly line work of beer barrel filling, the production efficiency and quality can be effectively improved, the labor cost is reduced, and the safety risk is reduced.

An abutment for dental build-up. The abutment is lockable to an implant body. The abutment has an opening with an introduction end and an exit end. A fixing screw in introducible via the introduction end. The screw portion of the fixing screw projects from the exit end. The screw portion is screwable with the implant body for locking. The opening has a tapering from the introduction end towards the exit end. In the locked state, the upper end of the screw head is at a distance from the introduction end. The abutment has a threaded portion. A locking element has a mating thread corresponding to the threaded portion for releasably connecting the locking element to the abutment. The locking element can be introduced into the opening via the introduction end and is releasably connectable to the threaded portion via the mating thread.

A nut driver includes an elongate drive shank and a reversible socket. The socket has a first hex socket opening sized to engage a hexagonal profile of a first size, and a second hex socket opening sized to engage a hexagonal profile of a second size that is larger than the first size. The socket is mountable on the drive shank in either a first orientation that presents the first hex socket opening for use, or a second orientation that presents the second hex socket opening for use. Additionally, in the first orientation, the socket is mountable in either a screw head receiving position or a drive bit receiving position.

The invention comprises a dental prosthesis device comprising a first dental prosthesis component to be fastened in the oral cavity of a patient, having an internal thread, a second dental prosthesis component to be fastened to the first component in the oral cavity of the patient, having a screw channel and a screw head abutment surface, and a screw for fastening the second dental prosthesis component to the first dental prosthesis component, having a screw head with a tool engagement section, an external thread section with an external thread corresponding to the internal thread of the first dental prosthesis component, and a shaft section located between the screw head and the thread section, wherein a head support surface is formed in the transition between the screw head and the shaft section for supporting the screw head on the screw head abutment surface of the second dental prosthesis component,and the threaded portion and the shaft portion are designed to pass through the screw channel of the second dental prosthesis component, characterized in that the external threaded portion of the screw has a longitudinal groove extending over the entire length of the external thread, and the screw head abutment surface of the second component has a projection corresponding to the longitudinal groove, the cross-sectional dimensions of which are designed such that the projection engages in the longitudinal groove when the external threaded portion is passed through the screw channel.

A spinal fixation system including: a pedicle screw including a screw head, a screw tip opposite to the screw head, a screw body extending from the screw head to the screw tip, and a channel extending from a first opening defined in the screw head to a second opening defined at a side of screw body; a tulip head defining a cavity configured to accommodate the screw head, and defining a slot configured to accommodate a fixation rod; a nail including a nail head, a nail tip, and a nail body extending from the nail head to the nail tip, the nail body including a curved portion that is flexible; and an inserter for the nail configured to cooperate with the tulip head.

The lock screw assembly comprises a screw and a nut, the screw comprises a screw head and a screw body, the area of the screw head is larger than that of the screw body, triangular threads are arranged on the peripheral side of the screw body, trapezoidal threads or triangular threads are arranged on the peripheral side of the screw head, and the thread pitch of the screw head is larger than that of the screw body. The nut is in threaded connection with a screw head of the screw. According to the structural design, when the screw is to be loosened due to vibration, under the action of the nut and the threads with different screw pitches, an opposite axial acting force can be generated to prevent the screw from being loosened, so that a good anti-loosening effect is achieved, and the anti-loosening screw is very suitable for use occasions with high requirements for anti-loosening performance; the screw and the nut need to be clamped by an internal hexagonal wrench and an external hexagonal wrench respectively, force in opposite directions is applied to separate the nut from the screw, and then the screw is taken out, so that the screw has a detachable function and is convenient to reuse.

The utility model discloses a vacuum screw head, relates to the field of drilling of soil layers or rocks, and solves the problem that when a single-pipe drilling tool is pulled out of a drill to extract a rock core, the suction effect in a drill hole reduces the rock core extraction rate. According to the technical scheme, the vacuum screw head comprises a connecting base and a sliding sleeve, the connecting base comprises a connecting shaft provided with a pipe cavity and a base fixed to one end of the connecting shaft, the other end of the connecting shaft is a connector used for being directly or indirectly connected with a drill rod, the connecting shaft is arranged in an inner hole of the sliding sleeve in a penetrating mode, and the sliding sleeve can slide along the connecting shaft. The outer side of the sliding sleeve is provided with an external thread which is used for being directly or indirectly connected with a single-pipe drilling tool. The connecting shaft is further provided with a first through hole and a second through hole, the first through hole and the second through hole are both communicated with a pipe cavity of the connecting shaft, the position of the sliding sleeve on the connecting shaft is automatically controlled through friction force between the sliding sleeve and the hole wall of the drill hole, opening and closing of the first through hole and the second through hole are correspondingly changed, and a flushing fluid conveying channel is correspondingly changed. The utility model can improve the core recovery rate.

The invention belongs to the field of manipulators, and particularly relates to a manipulator of a stacking robot for logistics warehousing, which comprises a machine head, the top of the machine head is fixedly connected with a mounting screw head, the bottom of the machine head is slidably connected with two symmetrically distributed sliding columns, the sliding columns penetrate through the machine head, and the middle sections of column bodies of the sliding columns are fixedly connected with two limiting rings. The two limiting rings are slidably connected with the inner surface and the outer surface of the machine head correspondingly, a connecting column is inserted into the bottom of the sliding column, a quick release mechanism is jointly arranged between the connecting column and the sliding column, and a clamping jaw shell is fixedly connected to the bottom of the connecting column. An original clamping jaw is arranged to be a hollow clamping jaw shell, then an anti-falling protection mechanism is arranged in the clamping jaw shell, when a clamping plate is pressed to retract inwards, a waist wheel rotates to drive a shovel plate to horizontally stretch out, bottom support of goods is formed, sliding caused by insufficient clamping force is prevented, meanwhile, a fourth spring exerts reset force on the waist wheel through a cushion block, and the clamping jaw is prevented from falling off. And the shovel plate can be automatically withdrawn after being unloaded.