948 results about "Self-tapping screw" patented technology

The present invention relates to an orthopedic plate and screw system and instruments for surgical fixation of a small bone or bones. The plate facilitates three dimensional contouring to provide for a variety of applications and to accommodate individual variation in bone shape. The plate has a modified x shape including a central trunk portion including one or more screw holes along a longitudinal axis and a set of divergent upper and an oppositely extending set of divergent lower arms, each arm including screw holes which are placed at a radially equal distance but which diverging asymmetrically from the longitudinal axis relative to its paired upper or lower mate. The screws of the system are self-starting, self-tapping screws including the option of partial or full cannulation.

A device for removable attachment to a bone of a living patient, useful as a mounting support for a trackable part of a computerized surgical navigation system and a method for attaching an object removably to a bone of a living patient. A shaft having a self drilling, self-tapping screw tip can be inserted transversely of the bone and securely screwed into the cortex. A screw drives a sharp-edged sleeve along the shaft to engage the near cortex. A stepping mechanism allows incremental angular movement of a portion of an adjustment mechanism and indicates when the sleeve is securely engaged by resisting further tightening.

A bone fixation device for fixing a first bone to a second bone includes a self tapping screw having an aperture extending along a longitudinal axis of the screw, and a driver having an aperture extending from a proximal end to a distal end along a longitudinal axis of the driver, the distal end being configured to engage the screw such that the aperture of the driver and the aperture of the screw are coaxially aligned, thereby defining a lumen. A guide rod having a tapered tip for piercing bone tissue is shaped and dimensioned to extend through the lumen and configured to fasten to the driver. A blunt-ended rod advances a bioactive agent through the lumen, the blunt-ended rod being dimensioned to extend through the lumen to decrease the injury to vital structures as the screw is advanced into the second bone.

Provided are a DGC modular fabricated building system and a building method thereof. Wallboards are composite boards prefabricated in a factory. Light steel profiles and light steel keels are connected through self-tapping screws. The corners of the light steel profiles with grooves in frames are connected through self-tapping screws and light steel keel connecting pieces. The interiors of the wallboards are filled with heat preservation materials. Pouring layers of modified cement mortar or light aggregate concrete materials are arranged on the outermost sides of the wallboards. Floors are composite boards prefabricated in the factory, and each composite board is a foundation bottom plate or a floorboard or a roof panel of the DGC modular fabricated building system. The wallboards are connected through board connecting pieces, the wallboards and the floors are connected through board connecting pieces, and the floors are connected through board connecting pieces. The DGC modular fabricated building system is simple in structure, convenient to mount and low in cost, the construction period can be saved, and therefore the defects that an existing fabricated building is single in structure, complex in mounting process and high in manpower cost are overcome.

The invention provides a simply-built green light steel fabricated building and an installation method. The fabricated building comprises wall plates, main plates, composite frame columns and main connection pieces. The two wall plates are connected by means of the corresponding main connection pieces through self-tapping screws. The composite frame columns and the wall plates are connected by means of the corresponding main connection pieces through self-tapping screws. In the connection process, firstly the main connection pieces abut against the composite frame columns, the self-tapping screws are screwed into the composite frame columns to fix the composite frame columns, the wall plates are then arranged in place, and the main connection pieces are clamped into lateral side grooves of the wall plates. The main boards are connected with the composite frame columns, and body column sleeves of the portions, on the top layers of the main plates, of the composite frame columns are inserted in upwards-exposed tenon columns in a sleeved mode and are then fixed through bolts. By means of the full industrialized prefabrication of the wall plates and the main plates, the prefabrication rate of main components of the building is greatly increased, and therefore the structure safety and quality of the building are better facilitated, site workloads are reduced, the construction environment pollution is reduced, the construction period is shortened, and cost is saved.

The invention relates to an accessory for a tent, in particular to a grounding nail of pull wires of a rotatable, telescoping and anchoring type tent. The accessory consists of a rotating rod, a shell nail, an anchor-piece shaft, a movable anchor piece, a drag hook, a shell handle, a rotating handle, a contracting-piece slot and an expanding-piece port, wherein, the top of the rotating rod is provided with the drag hook; the rotating rod is arranged in the shell nail, the upper part of the shell nail is a column and the bottom of which is a self-tapping screw with a cone shape. The side wall of the lower end of the rotating rod is provided with three contracting-piece slots which form an angle of 120 degrees in horizontal direction. Each contracting-piece slot is provided with an anchor piece shaft and a movable anchor piece. The grounding nail of the invention has effective anchoring effect, is able to firmly fix even on the soft ground and is very convenient and labor-saving when being mounted and pulled out of ground.

The present invention relates to a thread (400) in particular for a thread-rolling or self-tapping screw (100) or nut, respectively, having a non-triangular thread profile (300) with leading thread faces (422) and trailing thread faces (424) wherein at least one of said leading thread faces (422) and trailing thread faces (424) is provided with a convex curvature having a first radius (R). The tip (442) of said non-triangular thread profile (400) has also a convex curvature with a second radius (r1) wherein the value of the first radius (R) is different from the value of the second radius (r1).

A dynamic cervical plate includes a first end section and a second end section. In embodiments, the dynamic cervical plate may include one or more middle sections positioned between the first and second end sections. Each section may be longitudinally repositionable. Each section may include a plurality of openings for receiving threaded fasteners such as a self-starting screw or a self-tapping screw. In addition, each section may include an orifice for releasably mating with a drill guide. Each of the end sections may include a notch at one end for aligning with the drill guide or fixation pins. In one embodiment, a pin is used to interconnect the sections. In other embodiments, support bars are used to limit flexure between sections. In embodiments, one or more locking elements and / or one or more support bars may operably interconnect each section.

A motor vehicle door module including a module plate, a vertical rail secured to the module plate, and a glass carrier mounted for vertical sliding movement on the rail. The module plate includes a main body planar plate portion and a pair of vertically spaced annular pedestals upstanding from the main body planar plate portion. Each pedestal defines a smooth cylindrical bore and an annular concave conical seat formed at the free end of the pedestal in surrounding relation to the bore. The rail includes a pair of vertically spaced apertures with a concave conical seat in surrounding relation to each aperture sized to nest in the respective pedestal conical seat. The assembly further includes a pair of self-tapping screws each having a conical flat head sized to seat in a respective rail seat. In assembled relation each conical head of each screw nests in a conical rail seat, each rail seat nests in a pedestal seat, and a threaded shank of each screw self-tappingly engages the smooth cylindrical bore of the respective pedestal.

The invention discloses a vacuum seal sucking disk which comprises a sucking disk cover, a fixed rod inserted into the sucking disk cover, and a sucking disk body connected to the bottom end of the fixed rod, wherein a spring sheathed on the fixed rod is arranged between the sucking disk cover and the sucking disk body; a handle is also arranged outside the fixed rod; the top end of the fixed rod is fixed with a connecting rod; the handle is provided with a wedge-shaped groove for the connecting rod to pass through; the top of the sucking disk cover is provided with a connecting shaft which is inserted into the handle and flexibly connected with the connecting rod; a top cover is arranged outside the connecting shaft; the top cover is tightly connected with the connecting shaft though a self-tapping screw; the top of the top cover is provided with a rubber plug for packaging the self-tapping screw; and a soft rubber pad is arranged between the sucking disk body and the sucking disk cover. When the handle is rotated, the soft rubber pad and the sucking disk cover are sucked together, so that the sealing property is greatly improved, the sucking force of the sucking disk is greatly enhanced, and a heavy object is not easy to fall off when being hung.

A self-drilling / self-tapping screw comprises a shank having a plurality of self-tapping thread convolutions thereon and a head on an end of the shank. The shank further includes a longitudinal axis about which the shank rotates and an entering end portion on another end thereof. The entering end portion comprises a sharp pointed tip substantially located on the longitudinal axis of the shank, a first cutting edge has a first acute angle with the longitudinal axis of the shank, and a second cutting edge having a second acute angle with the longitudinal axis of the shank, the second acute angle being smaller than the first acute angle. In an embodiment, a groove is provided in the entering end portion to increase the cutting speed.

A dynamic cervical plate includes a first end section and a second end section. In embodiments, the dynamic cervical plate may include one or more middle sections positioned between the first and second end sections. Each section may be longitudinally repositionable. Each section may include a plurality of openings for receiving threaded fasteners such as a self-starting screw or a self-tapping screw. In addition, each section may include an orifice for releasably mating with a drill guide. Each of the end sections may include a notch at one end for aligning with the drill guide or fixation pins. In one embodiment, a pin is used to interconnect the sections. In other embodiments, support bars are used to limit flexure between sections. In embodiments, one or more locking elements and / or one or more support bars may operably interconnect each section.

The invention discloses a plate metal embedded pressing strip, which comprises two plates, wherein each embedded pressing strip comprises a base and a gland strip which can be bucked on the base. The base and the gland strip are in buckle type combination and disassemble structure, wherein, the base is tightly fixed on the wall surface through self tapping screw, the two plates are respectively arranged on two sides of the base, the gland strip is buckled in the base, and the two plates and the embedded strip can be fixed into a whole or can be conveniently disassembled or reused. The strip of the invention fills the blank of the prior art, and is suitable for the decoration of various wall surfaces, especially for decoration of elevator car. The strip of the invention is simple in structure and easy in mounting and replacing decoration plate, and can be reused for many times, thereby causing client having more selections and humanized designs.

The invention provides an osteosynthesis and compression screw that is self-boring and self-tapping for the purpose of coaptation of small bone fragments. The screw comprises:a proximal portion formed by a screw head provided with an outside thread;an intermediate portion having no thread; anda distal portion provided with an outside thread.Wherein:each of the screw head and the distal portion includes at least one groove, firstly extending over the entire axial length of its thread, and secondly being formed through each thread in such a manner to form tapping means; andthe terminal zone of the distal portion is provided with preparation means for preparing a housing in the bone fragments for receiving the intermediate and distal portions of the screw.

The invention discloses a fabricated wood structure embedded steel bar joint which comprises a wood beam, a wood column, a beam-end embedded steel bar, a joint connector and a joint fastener. The wood beam and the wood column are connected through the joint connector, the beam-end embedded steel bar and the joint fastener, the beam-end embedded steel bar is embedded into a duct pre-bored or reserved in a beam end or a channel formed in the beam end through structural adhesives, the channel is sealed by a small batten and structural adhesives, the joint connector is fixed onto a column body through the joint fastener, the joint fastener is fixed to one side of the wood column back to the wood beam through an anchor plate and a cushion block, and cross grains of the embedded steel bar of the beam end are enhanced by self-tapping screws. The invention further discloses a construction method of the fabricated wood structure embedded steel bar joint. Structural stability can be ensured under small earthquake, large deformation of a structure can be realized under large earthquake, structural damage can be controlled, and the fabricated wood structure embedded steel bar joint is high in bearing capacity, energy dissipation and ductility.

The invention discloses an assembly wood structure beam column embedded steel bar joint which comprises a wood beam, a wood column, an embedded steel bar, adhesives, an assembly connector, a joint fastener and a steel base plate. The wood beam is connected with the wood column through the assembly connector, the embedded steel bar and the joint fastener, the embedded steel bar is embedded into a pre-bored or reserved duct or formed channel at a beam end, the assembly connector is fixed to a column body through the joint fastener, the joint fastener is fixed on one side of the wood column back to the wood beam through the steel base plate, and cross grains of the embedded steel bar position at the beam end are strengthened by the aid of self-tapping screws. The joint has high bending resistance, joint stiffness, energy-dissipating capacity and ductility, can ensure a reliable structure under a small earthquake and can also control structural damage when the structure greatly deforms under a large earthquake, and ideal effects of high bearing capacity, high energy dissipation and high ductility are achieved.

The invention relates to a self-boring and thread-forming tapping screw having a screw shaft with a screw tip at one end and at the other end a force application member for the transmission of a turning moment. The screw shaft includes a threaded section with the screw tip and an adjacent thread-free section of the shaft including the force application member. The threaded section has a shaft core and a self-tapping thread. The threaded section includes a core section axially displaced from the tip and having a polygonal core cross section. Corners of the core cross section define an enveloping circle with an enveloping circle diameter larger than a shaft diameter of the thread-free section.

The invention discloses a light steel keel composite concrete wallboard hoisting structure and a mounting method thereof. The light steel keel composite concrete wallboard hoisting structure comprises a light steel keel framework, a concrete plate and a keel concrete plate connector; the light steel keel framework consist of joint keels and vertical keels, the joint keels adopt U-shaped keels, the vertical keels adopt C-shaped keels, and the keels are connected and assembled via high-strength self tapping screws; the light steel keel framework is internally filled with a thermal-insulating material, and a cement fiberboard or a gypsum board and other boards are mounted on the light steel keel framework to serve as a wall inner surface. Compared with the prior art, the light steel keel composite concrete wallboard hoisting structure and the mounting method thereof disclosed by the invention have the advantages that the construction speed is greatly improved, and the construction period can be shortened by 30-50 percent; the thickness is thin, used materials are fewer, the manufacturing process is simple, and the overall cost is reduced by 10-30 percent compared with that of a traditional exterior wall, so that the construction cost can be reduced.

The invention discloses a toughened and reinforced ABS material and a method for preparing the same. The toughened and reinforced ABS material is prepared by the following compositions by weight percentage: 55 to 75 percent of acrylonitrile-butadiene-styrene copolymers, 5 to 15 percent of toughening agent, 10 to 30 percent of reinforcing agent, 3.0 to 7.0 percent of compatilizer, 0.3 to 0.5 percent of coupling agent, 0.1 to 1.0 percent of antioxidant and 0.3 to 0.7 percent of glass-fiber exposure resistant agent. The method effectively improves the impact strength and the toughness of a whole system through addition of the toughening agent into an ABS and GF system. During the process of fusing and extruding the toughened and reinforced ABS, the toughening agent is uniformly distributed in ABS resins; when the material or a molded piece is impacted, the toughening agent which is uniformly dispersed in the ABS resins can effectively absorb the impact energy in time so as to improve the toughness of the reinforced ABS and make the molded piece achieve the effect that the molded piece can not be cracked when a self-tapping screw is tightened.

An apparatus and method for fastening a wood panel to a high structural strength steel frame member using self-drilling, self-tapping screws. An electrically powered rotary driver with an attached screw driver bit is carried by a pneumatically-powered telescoping driver support / fastener-positioning unit that includes a fastener positioning plate, telescoping members attached to the fastener positioning plate, and a pair of foot plates for the operator to stand on whereby to hold the apparatus down during a screw-driving operation. The driver and the driver support / fastener-positioning unit are controlled by an electro / pneumatic system. The method implemented by that system comprises retracting the driver support / fastener positioning unit so as force the screw driver bit to engage in the positioning plate, operating the driver as the telescoping members are retracted so that the screw driver bit will cause the engaged fastener to drill in turn through the wood panel and the steel frame member and form a screw connection with the steel frame member, and then turning off the driver and re-extending the telescoping members so as disengage the screw driver bit from the driven fastener, ready for a new screw-driving operation.

The invention provides a stamped metal connecting plate and a truss. The plate body is a thin metal plate with screw holes distributed on, and the upper plates used to connect with a chord and the lower plates used to connect at least one web member to form an integrated stamped piece, wherein the two side edges of the lower plates are provided with kidney and arc-shaped outward flanging; the top terminal of the arc-shaped outward flanging intersects with the bottom edge of the chord; the bottom terminal of the arc-shaped outward flanging intersects with the lateral edge(s) of the web member(s). A stamped groove is arranged from the upper plates to the lower plates of the plate body near the center of each web member. The truss is formed by stamped connecting plates, wherein the two stamped connecting plates are clamped on the pros and the cons of the connecting nodes of the truss; the two upper plates are connected fixedly with the chord by self tapping screws or bolts; the lower plates are connected fixedly with one to three web members by self tapping screws or bolts. The invention greatly enhances the bearing capacity and the rigidity of the truss, the manufacture and the assembly are convenient.

The invention relates to an elevator car and an installation method thereof. The elevator car comprises a back wall plate, a first sidewall plate, a second sidewall plate, two door uprights, a door lintel, a car top plate and a car bottom plate, wherein the car bottom plate and the back wall plate, the car top plate and the first sidewall plate are connected through connecting sheets arranged on the plates respectively in the way of using screws and nuts or self tapping screw and the like during assembly, and the back wall plate and the two sidewall plates, the two sidewall plates and the door uprights are connected both in the way of using mutually meshing hooked inserts. Due to reliable connection and the convenient installation and disassembly of the car, installation personnel can finish a whole installation process in front of the car without entering space between the car and shaft-way inner walls to car wall plates through fasteners, so that installation steps are saved, and on-site installation efficiency is improved.

An improved electrical ceiling box including a top portion bounded by a peripheral side portion, with a pair of diametrically opposed ear lugs rigidly secured to the side portion. Each ear lug has a pair of ears integrally formed therewith extending inwardly into the interior cavity of the box. A first ear fits within a recess formed in the bottom edge of the box, while a second ear extends through a slot formed in the side portion of the box. The second ear has a mounting hole formed therein adapted for threaded engagement with a self-tapping screw, while the first ear has a receiving hole formed therethrough for supporting the distal end of the screw. In a preferred embodiment, the box has a substantially hexagonal configuration. In an alternative embodiment, the box has a circular configuration and is shallower, thereby eliminating the need for a pair of slots for receiving the first ears. Preferably, the ear lugs are formed from a heavier gauge material than the remainder of the box for improved strength and resistance to breakage from fatigue.

The invention discloses an intelligent mold production and processing device which comprises a base, sliding blocks, a cross beam, a drive motor and drill bits. Mounting plates are symmetrically arranged on the left side and the right side of the upper surface of the base and are fixedly connected with the base through self-tapping screws. A threaded lead screw is rotationally mounted between themounting plates on the left side and the right side through bearings. The right end of the threaded lead screw penetrates out of the corresponding mounting plate and is fixedly connected with an adjusting wheel. A left sliding block and a right sliding block are mounted on threads on the left part and the right part of the threaded lead screw in a threaded manner and are mounted on a limiting column in a sliding manner. Clamping claws are welded to the upper sides of the left sliding block and the right sliding block. Through mutual displacement of the clamping claws, drilling of molds of different widths is met; the structure is simple, operation is easy, and stop can be immediately achieved when operation is stopped; and stability during mold drilling is greatly improved, and the situation of mold displacement during drilling is effectively avoided.

An upright tree stand includes a base pole section with a support pad, an intermediate pole section or sections, a lowermost one of which is connected to the base pole section by a knuckle hinge, and a top pole section. The top pole section is provided with a top securement assembly which utilizes a self-tapping screw and a remotely operable, dual-action ratchet wrench. The base pole section is initially secured to a tree. The intermediate pole section or sections and the top pole section are then swung, about the knuckle hinge, into an upright position. This movement is accomplished with sufficient force to embed the tip of the self-tapping screw into the tree. Operation of the dual-action ratchet wrench, remotely from the ground, will accomplish the positive securement of the top of the upright tree stand to the tree while the user remains safely on the ground.