1333 results about "Screw head" patented technology

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.

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.

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.

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 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 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.

The utility model belongs to the technical field of disassembly and assembly tools, and particularly relates to an electric wrench which comprises a wrench body, an open gear, a driving assembly and a reverse torque wrench. The wrench main body is provided with an imbedding opening communicated with the cavity of the wrench main body; an opening in the open gear communicates with an inner ring of the open gear to form a first jaw, and the open gear is rotationally arranged in the cavity. The driving assembly is in transmission connection with the opening gear; a second jaw is arranged on the reverse torque wrench, the reverse torque wrench is arranged outside the wrench body, and the opening direction of the second jaw is the same as the opening direction of the placing opening. According to the electric wrench, a first jaw on an open gear and a second jaw on a reverse torque wrench can be clamped on a screw head and / or a nut connected to a pipeline respectively, and the open gear can be driven by a driving assembly to rotate, so that the screw head and the nut connected to the pipeline rotate relatively, and the screw head and the nut are tightened or loosened; disassembly and assembly of the screw head and / or the nut can be rapidly completed, and therefore the maintenance efficiency of a pipeline is improved.

The utility model discloses a pneumatic screwing device, which relates to the technical field of screwing equipment and comprises a base, a screwing mechanism mounted at the top of the base, a driving mechanism mounted at the top of the base and used for driving the screwing mechanism to lift, and a clamping mechanism mounted at the top of the base and used for clamping a pipe fitting to be screwed, the screwing mechanism comprises a movable seat movably arranged on the top of the base, a rotating air cylinder fixedly installed in the movable seat and a screwing head fixedly installed at the bottom end of the rotating air cylinder. The pneumatic screwing device is driven by the motor and matched with the threaded rod to rotate, parts such as the rotating air cylinder can be driven to ascend and descend, the screwing head can be driven to twist by matching with rotation of the rotating air cylinder, the nut can be screwed on a clamped automobile pipe fitting through the screwing head after the screwing head ascends and descends and rotates, pneumatic screwing is carried out, and compared with manual screwing, the pneumatic screwing device is more labor-saving and convenient to use, and the working efficiency is improved. And the consumption of human resources is reduced, and the installation and working efficiency is improved.

A tulip assembly configured to be coupled to a screw head having a first diameter includes a housing, wherein the housing defines an inner diameter configured to engage the first diameter of the screw head. The exemplary inner diameter of the housing being smaller than the first diameter of the screw head.

A control unit for a motor vehicle, including a housing and at least one electronic component accommodated in the housing. The housing is provided with at least one screw-receiving hole for receiving a mounting screw, and a bridging element consisting of metal and used for a ground connection of the at least one electronic component is also present, which bridging element, via a first end region which is located inside the housing, is electrically connected to the electronic component and, via a second end region which can be resiliently deformed along the screw-receiving hole, is arranged in a support region intended for axial support of a screw head of the mounting screw. A drive module with this control unit is also provided.

A screw with an improved screw head is provided. The screw may include a shank having a threaded portion and a head. The head may have a side and a plurality of protrusions positioned along the side. Each protrusion may comprise an outer wall, and a trailing wall and a leading wall each extending between the outer wall and the side of the head. The leading wall may define a plurality of leading surfaces. The plurality of leading surfaces may comprise a first leading surface extending inwardly from the outer wall, a second leading surface extending inwardly from the first leading surface, and a third leading surface extending between the second leading surface and the side of the head. The plurality of leading surfaces may provide curvature to the leading wall and a substantially smooth transition between the outer wall and the side of the head.

The utility model relates to a device for detecting falling of a spinning cake spinning head. The device comprises an air blowing device, a grating detection device and a PLC (Programmable Logic Controller), the spinning cake is positioned between the blowing device and the grating detection device; the grating detection device comprises a grating transmitter and a grating receiver; the blowing device is used for generating airflow to blow to the spinning cake, and if a spinning head of the spinning cake falls off, the spinning head can be blown to the space between the grating emitter and the grating receiver; the grating receiver is electrically connected with the PLC, and if a screw head exists between the grating emitter and the grating receiver, the grating receiver sends a signal to the PLC. According to the detection device for the falling of the spinning cake spinning head, the falling condition of the spinning head is automatically identified through the grating detection device, the detection is convenient and rapid, and equipment damage is avoided.

The utility model relates to the technical field of bolts, in particular to a quick disassembly type positioning bolt. The quick detachable positioning bolt comprises a screw rod and a screw head, a hexagonal block is arranged at the top of the screw rod, a hexagonal groove is formed in the top of the screw head in a penetrating mode, the hexagonal block is inserted into the hexagonal groove, and first sliding grooves are evenly formed in the outer side wall of the screw head. After the sealing plug is taken down, the cross bolt can be screwed down, then the cover cap is moved upwards to be taken down, a slotted screwdriver can be inserted into the clamping groove, the clamping block is pushed outwards to be separated from the inserting groove of the screw head, then the screw head can be moved upwards to be taken down, and at the moment, the positioned and fixed external part can be moved upwards to be separated from the screw rod. And then the lubricant can be easily input into a connecting gap between the screw rod and the external threaded hole, and at the moment, the hexagonal block is rotated by using a wrench to drive the screw rod to be screwed out of the external threaded hole, so that the effect of quickly disassembling the rusted screw rod is realized.

The utility model provides an excavator center swivel joint installing and positioning device which comprises a positioning disc used for being connected with a swivel support of a swivel joint, a shaft hole penetrating through the thickness of the positioning disc is formed in the positioning disc, the shaft hole and the swivel support are coaxial, the shaft hole is used for being arranged on the swivel joint in a sleeved mode, and the positioning disc is used for being connected with the swivel support. The periphery of the shaft hole is provided with a plurality of screw head groove holes penetrating through the thickness of the shaft hole, the screw head groove holes correspond to the positions of a plurality of screw heads on the swivel joint respectively, and the screw head groove holes are communicated with the shaft hole. Based on the mounting and positioning device, the positioning accuracy and the positioning efficiency of the center swivel joint of the excavator can be improved, so that the mounting efficiency of the center swivel joint of the excavator is improved.