300results about How to "Dynamic stability" patented technology

A facet fixation system facilitates dynamic or static stabilization with few exposed components. A first anchor component is adapted for implantation through a facet joint and into intra-pedicle bone, and a second anchor component is adapted for fixation to the outer surface of the facet joint. A connector component connects the first and second anchor components. The connector component may be at least partially elastic, facilitating a dynamic stabilization of a facet joint, or rigid, facilitating a static stabilization of a facet joint.

A pre-curved flexible member is provided for use with a dynamic stabilization system or implant to provide dynamic stability to a person's spine. In one embodiment, the pre-curved flexible member includes a pre-curved body having an outer surface and opposing ends with a curved intermediate portion extending therebetween. Each of the opposing ends includes retention features, for example notches and/or protrusions, for cooperation with retention features on a corresponding anchor member to securely retain the pre-curved flexible member therebetween.

A spinal rod connector is adapted to connect two spinal rods. The spinal rod connector includes first and second channels which are defined in a housing. The first and second channels can be urged together in order to capture first and second spinal rods when a fastener is actuated. The spinal rod connector allows the first and second rods to be positioned relative to each other in one of a parallel and a non-parallel manner prior to the fastener locking the first and second spinal rods in position.

The present invention relates to spinal support devices and, more specifically, to a flexible member having variable flexibility for use with a dynamic stabilization system or implant to provide dynamic stability to a person's spine. The flexible member generally includes a first material having a first portion including a first material having a first elasticity and a second portion including a second material having a second elasticity greater than the first to provide the flexible member with a variable flexibility.

An apparatus, method and computer-readable medium planning a path of a robot by planning an optimal path while satisfying a dynamic constraint. In a process of searching for a motion path from a start point to a goal point while extending a tree from a start point of a configuration space to generate a path, along which a manipulator of the robot is moved in order to perform a task, an optimal path is generated responsive to the dynamic constraint of the manipulator of the robot to generate stable motion satisfying momentum and Zero Moment Position (ZMP) constraint. Accordingly, path planning performance is improved and a path satisfying a kinematic constraint and a dynamic constraint is rapidly obtained.

A flexible rod for use in spinal stabilization having a tube having a helical slit defining a gap and an elastomeric jacket provided in the throughbore of the tube, within the gap, and upon the outer surface of the tube.

A die cushion apparatus of a press machine in which a discharge opening of a fluid hydraulic pump/motor is directly connected to a pressure chamber on a cushion pressure production side of a fluid hydraulic cylinder and the torque of a rotating shaft of the fluid hydraulic pump/motor is controlled by an electric motor to control a pressure (die cushion pressure) of the pressure chamber on the cushion pressure production side. It is therefore possible to control the die cushion pressure with excellent responsiveness with respect to a die cushion pressure command and prevent occurrence of a surge pressure. The die cushion apparatus also has excellent energy efficiency since energy required for a die cushioning action that a cushion pad receives when effecting die cushioning of a press machine is regenerated as electrical energy through the fluid hydraulic cylinder, fluid hydraulic pump/motor, and electric motor.

A dynamic bone anchor for anchoring a spine stabilization assembly which supports the spine while providing for the preservation of spinal motion. The dynamic bone anchor provides load sharing while preserving range of motion and reducing stress exerted upon the bone anchors and spinal anatomy. The dynamic bone anchor includes a deflectable post connected by a ball-joint to a threaded anchor. Deflection of the deflectable post is controlled by a durability enhanced compliant sleeve. The force/deflection properties of the dynamic bone anchor may be adapted to the anatomy and functional requirements of the patient. The dynamic bone anchor may be used as a component of a dynamic stabilization system which supports the spine while providing for the preservation of spinal motion.

A driven accessory having a clutch that permits selective operation of an accessory portion. The clutch employs rotational inertia to control driving engagement of a wrap spring to an interior clutch surface on a drive member and/or driving disengagement of the wrap spring from the interior clutch surface.

A dynamic spinal stabilization component which supports the spine while providing for the preservation of spinal motion. The component may be integrated in a bone anchor for implantation in a bone of the spine. The component and bone anchor provide load sharing while preserving range of motion and reducing stress exerted upon the bone anchors and spinal anatomy. The dynamic spinal stabilization component includes a deflectable post connected by a ball-joint to a threaded anchor. Deflection of the deflectable post is controlled by an axially compressible spring. The force/deflection properties of the dynamic bone anchor may be adapted to the anatomy and functional requirements of the patient. The dynamic spinal stabilization component may be used as a component of a dynamic stabilization system which supports the spine while providing for the preservation of spinal motion.

Provided is a photographing optical device, which is able to reliably correct an unintentional movement by hand of a user by improving the constitution of a camera unit driving mechanism for correcting the deflection of a camera unit. In order that a camera unit is made to be rocked to correct the unintentional movement, a photographing optical device includes a first camera unit drive mechanism and a second camera unit drive mechanism, which are so disposed at two side portions sandwiching a pivot portion therebetween as to make a pair. In these camera unit drive mechanisms, camera unit driving magnets are held on the side of the camera unit as a movable body side, and camera unit driving coils are held on the side of a stationary body. The camera unit is pushed toward the pivot portion by a gimbal spring.

A dynamic bone anchor for anchoring a spine stabilization assembly which supports the spine while providing for the preservation of spinal motion. The dynamic bone anchor provides load sharing while preserving range of motion and reducing stress exerted upon the bone anchors and spinal anatomy. The dynamic bone anchor includes a deflectable post connected by a ball-joint to a threaded anchor. Deflection of the deflectable post is controlled by a compliant member. The dynamic bone anchor may be used as a component of a dynamic stabilization system which supports the spine while providing for the preservation of spinal motion. The dynamic bone anchor has splines on the outside of the housing to facilitate installation and the secure attachment of spine stabilization components.

The invention relates to the field of energy dissipation and vibration damping control of architecture structures, particularly to an assembly-type viscoelastic damping wall. The damping wall includes a middle steel plate, viscous-elastic material layers, two outside steel plates, an upper portion wall connecting steel plate, backing boards and two lower portion wall connecting steel plates, wherein the middle steel plate, the viscous-elastic material layers and the two outside steel plates are bonded together, the viscous-elastic material layers are respectively arranged between the middle steel plate and the two outside steel plates, the viscous-elastic materials are high attenuation rubber series viscous-elastic materials, and the viscous-elastic material layers are respectively firmly and reliably bonded with the middle steel plate and the two outside steel plates by utilizing a rubber and steel plate bonding process. The two outside steel plates, the upper portion wall connecting steel plate and the backing boards are firmly connected together through high-strength bolts, and the middle steel plate and the two lower portion wall connecting steel plates are firmly connected together through high-strength bolts. The assembly-type viscoelastic damping wall is high in energy-dissipating capacity, can provide relatively more use space for the architecture structures, facilitates installation and maintenance and meets the requirements of the design and functionality of the architecture structures.

The present application discloses a plurality of spinal implants and methods for repairing annular defects in intervertebral discs and for providing dynamic stability to the motion segment of the spine in the vicinity of the repaired disc. Each of the implants comprises a head portion and a tail portion. In the illustrated embodiments, the head portion of each implant is enlarged relative to the tail portion. Each of the head portions and tail portions is adapted to support adjacent vertebrae and resist collapse of the intervertebral disc. A tapered portion of each implant engages end plates of the adjacent vertebrae to resist forces tending to push the implant out of the intervertebral space. The tail portion of each implant includes a tail flange (which in some embodiments is of similar diameter to the head portion) that abuts extradiscal lips of the adjacent vertebrae and resists forces tending to push the implant deeper into the intervertebral space.

The invention discloses fully-automatic production equipment for cold granulation of a lead ingot. The fully-automatic production equipment comprises a feeding mechanism, a conveying mechanism, a slicing mechanism, a hobbing mechanism and a power mechanism, wherein the power mechanism is controlled by a PLC (Programmable Logic Controller) automatic control system; the feeding mechanism is butted with the conveying mechanism; the conveying mechanism is butted with the slicing mechanism; the slicing mechanism is butted with the hobbing mechanism; lead particles are manufactured by the hobbing mechanism; a cycloid needle reducer for chain transmission is adopted in the feeding mechanism; a stepping reducer for stepping conveying is adopted in the conveying mechanism, and the conveying mechanism is provided with a guide cover for guiding the lead ingot to be centralized and a compaction roller matched with a slice; a hydraulic pump station is adopted in the power mechanism, and the hydraulic pump station is provided with two loops, wherein one loop is used for driving an oil cylinder of the sliding mechanism to drive the slicing cutter to cut the lead ingot into lead pieces, and the other loop is used for driving a squeeze roller in the hobbing mechanism to hob the lead pieces into lead particles through a hydraulic motor; and a particle outlet of the hobbing mechanism is butted with a discharging mechanism, and the lead particles are conveyed by the discharging mechanism in a chain transmission way. According to the fully-automatic production equipment disclosed by the invention, continuous conveying and slicing of the lead ingot and no adhesion of the lead particles are realized, the time of conveying the lead ingot is shortened by simplifying the feeding mechanism of the lead ingot, and the production efficiency is improved.

The invention provides a system and a control method for drawing a crystal bar. The system comprises: a first control unit which is used for controlling the drawing speed of the drawn crystal bar to be constant; an obtaining unit which is used for obtaining a distance between a solid-liquid interface and a reference surface, wherein the solid-liquid interface is an interface between a crystal liquid and the current crystal bar; a crucible used for containing the crystal liquid; a heating device used for heating the crucible; a second control unit used for adjusting the crucible lifting ratio under the condition that the distance is different from the preset distance in order to make the distance reach the preset distance, wherein the crucible lifting ratio is the ratio of the crystal growth rate to the crucible lifting rate; and a third control unit connected with the heating device and used for controlling the heating power of the heating device to make the diameter of the crystal barat each position is within a preset range. The system makes the ratio v/G of the drawing speed of the drawn crystal bar to the temperature gradient of the solid-liquid interface kept unchanged, so that the defect concentration of the drawn crystal bar is reduced.

An adaptive spinal rod is provided for connecting levels of an adaptive stabilization system to support the spine while providing for the preservation of spinal motion. Embodiments of the adaptive stabilization rod include a ball having an anchor system, a deflection system, a vertical rod system and a connection system. The deflection system provides adaptive stabilization and load-sharing. The adaptive spinal rod connects different levels of the construct in a multilevel construct. The adaptive spinal rod cooperates with the deflection system to further reduce stress exerted upon the bone anchors and spinal anatomy.

The invention discloses a semicontinuous casting crystallizer for restraining cracking of a magnesium alloy ingot blank and a use method of the semicontinuous casting crystallizer and belongs to the technical field of casting. The crystallizer comprises an inner sleeve, heat preservation layers, a cooling water tank, a magnet exciting coil and a crystallizer shell. The heat preservation layers are arranged above the inner wall of the inner sleeve or arranged above the outer wall of the inner sleeve or arranged above the inner wall and the outer wall of the inner sleeve at the same time. The inner heat preservation layer is embedded into the inner sleeve and spliced to the inner wall. The outer heat preservation layer is embedded into the inner sleeve and spliced to the outer wall of the inner sleeve. The use method comprises the steps that 1, a dummy ingot is lifted into the crystallizer; 2, cooling water is opened, and the magnet exciting coil is provided with alternating current; 3, magnesium alloy melt is stirred through Lorentz force generated by the magnet exciting coil; and 4, after a stable solidified shell is formed, a casting machine is started, and the ingot blank is pulled out of the crystallizer. The method and crystallizer are reasonable, and the cracking tendency of alloy ingot blanks prone to crack and flat blanks and round blanks of large specifications in the semicontinuous casting process can be effectively lowered.

The invention discloses a lifting device with a height adjusting function. The lifting device with the height adjusting function comprises a top plate, a movable frame and a bottom frame. Sliding grooves are formed in the two side walls of the top plate and the two side walls of the bottom frame. First fixing holes are formed in the two side walls of the top plate. The middle of the movable frame is connected through a first transverse rod. A second transverse rod is arranged in one end of the bottom frame. The bottom end of the movable frame is movably connected with the bottom frame through a third transverse rod. A connecting block is arranged at the middle portion of the third transverse rod. A screw hole is formed in the side wall of the connecting block. A fixing sleeve is arranged at one end of the bottom frame. A screw connected with the screw hole is arranged in the fixing sleeve. The other end of the screw is connected with a motor. Rotation rods are arranged at the two ends of the third transverse rod. A second fixing ring is arranged at one end of each rotation rod. Check rings are arranged at the top end of the movable frame, and first fixing rings are arranged on one sides of the check rings.

The invention provides a power plant condenser steam jet and vacuumizing system with a pressure control function. The system comprises a steam turbine (1), a condenser (2), a condenser hot well (3), a power steam pressurizer (6), a steam ejector (11), a steam condenser (12), a water ring vacuum pump (14), a condensate discharge valve (8) of the steam condenser, a condensate drain pipeline water seal (17), a condensate pipeline liquid level switch (18), a pressure adjusting valve (13) on the inlet of the water ring vacuum pump, multiple control valves and pipelines, wherein the control valves and the pipelines are arranged among the parts. Due to the fact that pressure control of power steam, control of the liquid level after condensates flow back to the condenser hot well and inlet pressure control of the water ring vacuum pump are adopted, the vacuumizing system can maintain the maximum vacuum degree of the condenser, force of the condenser is improved, the vacuum degree of the condenser is improved, the heat consumption rate of the steam turbine is lowered, and coal consumption for unit power generation is lowered. The system is safe and free of maintenance, guarantees 100% of force and can operate stably for a long time. A pressure backflow adjusting system is arranged on the final-stage exhaust device, namely the water ring vacuum pump, so that it is guaranteed that the cavitation phenomenon of the water ring vacuum pump does not happen.

The invention discloses a pneumatic self-circulation animal cell culture bioreactor and an application method thereof. The bioreactor is characterized by comprising a large tank, a small tank located in the large tank, a magnetic stirring system located at the bottom of the large tank, a heating system and a controlling system, wherein a sealing cover is arranged at the upper end of the large tank, jackets connected with the heating system are arranged on two sides of the large tank, and a highest liquid level sensor of the large tank is arranged at the upper part in the large tank; and a sealing head is arranged at the upper end of the small tank, an opening is formed in the lower end, the sealing head is fixedly connected in a sealing manner with the sealing cover through a breathing pipe, the upper end of the breathing pipe penetrates out of the sealing cover and is connected with a vacuum air pump and an air pressure pump respectively, the lower end penetrates out of the sealing head and enters the small tank, a cavity used for accommodating a cell carrier is defined by two up-and-down horizontal stainless steel wire mesh boards in the middle of the small tank and the inner wall of the small tank, an upper liquid level sensor of the small tank is arranged above the cavity, and a lower liquid level sensor of the small tank is arranged below the cavity. The pneumatic self-circulation animal cell culture bioreactor has the advantages of good air tightness, simplicity in operation, low contamination rate, good cell quality and high yield.

The invention discloses a pontoon-hydraulic lattice column type wave electric power system connected with a corrosion-resistant slip sheet linkage mechanism. The wave electric power system is characterized in that: a main fixed pile 14 consists of N (N is more than or equal to 3) subpiles which are arranged in a lattice column mode; a primary transduction system consists of a special disk-shaped pontoon 13 which is connected with the linkage mechanism and sleeved on the linkage mechanism, a hydraulic transmission mechanism and a control mechanism; wherein the linkage mechanism consists of slip sheets which are made of materials such as seawater corrosion-resistant resin and the like, a connecting rod fixing base 12, a buffer rope and connecting rods (9 and 11); the hydraulic transmission mechanism consists of a hydraulic motor 2, an oil tank 4, N( N is more than or equal to 3) hydraulic cylinders 10 and hydraulic oil pipes (3, 6 and 7); the control mechanism consists of a lifting mechanism 15 and a control platform 8; a second transduction system consists of a generator 1 on a working platform 5 and converts mechanism energy into electric energy. The wave electric power system has the advantage of high conversion efficiency, facilitates project implementation and has high seawater corrosion resistance and high capacity of resisting damage of wind and wave.

The invention discloses a wave power generation device and a wave power generation method for underwater balanced type dual floating bodies. The device comprises a submarine bench, a transmission case and a pair of balanced type dual floating bodies, wherein the submarine bench is anchored on the seabed by virtue of a group of anchor chains or mooring ropes; the transmission case is arranged on the submarine bench, a first rope pulley and a second rope pulley are sleeved on one side end of a main shaft of the transmission case, and the output end of the transmission case is connected to a power generator; the pair of balanced type floating bodies comprises a group of surface floating bodies positioned on the water surface so as to collect wave energy and a group of underwater floating bodies soaked in the sea and positioned at a static water layer; the surface floating bodies and the underwater floating bodies are respectively pulled by one mooring rope; the lower ends of the mooring rope used for pulling the surface floating bodies and the mooring rope used for pulling the underwater floating bodies are respectively wound on the first rope pulley and the second rope pulley. According to the device and the method, a mode that the balanced type dual floating bodies work alternately and perform circulating continuous full-wave acting is adopted, so that the wave power generation efficiency is improved, and technical support is provided for realizing the commercialization of wave power generation.

The invention discloses emergency equipment for quickly clearing traffic congestion. The emergency equipment comprises a motorized delivery vehicle and a folding simple steel bridge which is arranged on the motorized delivery vehicle, wherein the folding simple steel bridge has a hinge structure which is formed by connecting a plurality of sections of bridge bodies by using hinges; a stretch driving mechanism and a locking mechanism are arranged between adjacent sections of bridge bodies; the motorized delivery vehicle is provided with a rotary disc; and the rotary disc is connected with one section of bridge body through a lifting mechanism. The emergency equipment for quickly clearing traffic congestion can quickly reach a site of traffic congestion through the vehicle-mounted folding simple steel bridge, and the folding simple steel bridge can be stretched by standing on an unblocked half-range road on the other side of one-way traffic congestion, so that vehicles on the half-range road in traffic congestion can be drained, and the problem of traffic congestion is solved.