2107 results about "Elastic rods" patented technology

A system for treating spinal deformities. A plurality of retaining clamps are fixed to a plurality of vertebrae and at least one elastic or super elastic rod is caused to pass through openings in the plurality of retaining clamps, the at least one elastic or super elastic rod being slidable within each of the plurality of retaining clamps along the axis of the spine to enable the spine to retain full flexion and extension in both its coronal and saggital planes.

An orthosis for correcting spinal deformities by urging spinal vertebrae toward a vertical axis. The orthosis includes a series of retaining clamps fixed onto the spinous process of said vertebrae, each of said retaining clamps having guides for retaining at least one elastic rod.

A Spinal column implant for elastic stabilization of vertebrae includes an elastic rod that is anchored in a non-positive fit fashion in the receptacle of a pedicle screws by means of a mobile filling piece and a clamping element. The non-positive fit is supported additionally by a dynamic form-fit contribution upon exposure to load.

A surgical instrument that creates a circular cut 42 of almost any diameter in the lens capsule 50 of the eye, yet its entire diameter is less than 1 mm when inserted into the eye. A cutting edge 14 is affixed to the distal tip of a super-elastic rod 11 with its distal end formed into a circular loop. The circular loop is first retracted inside of an outer tube member 12, and then the tube 12 is inserted into the eye. The loop is then expelled from the tube 12, allowing the loop to reform inside of the eye. As the loop is retracted back into the tube 12, the cutting edge 14 follows the circular path of the loop, cutting a circular opening (a capsulorrhexis) 42, into the lens capsule 50.

A method and system for pumping unit with an elastic rod system is applied to maximize fluid production. The maximum stroke of the pump and the shortest cycle time are calculated based on all static and dynamic properties of downhole and surface components without a limitation to angular speed of the prime mover. Limitations of structural and fatigue strength are incorporated into the optimization calculation to ensure safe operation while maximizing pumped volume and minimizing energy consumption. Calculated optimal prime mover speed is applied to the sucker rod pump by means of beam pumping, long stroke or hydraulic pumping unit by controlling velocity, acceleration and torque of the electric prime mover or by controlling pressure and flow rate in hydraulically actuated sucker rod pumping system.

A method and system for pumping unit with an elastic rod system is applied to maximize fluid production. The maximum stroke of the pump and the shortest cycle time are calculated based on all static and dynamic properties of downhole and surface components without a limitation to angular speed of the prime mover. Limitations of structural and fatigue strength are incorporated into the optimization calculation to ensure safe operation while maximizing pumped volume and minimizing energy consumption. Calculated optimal prime mover speed is applied to the sucker rod pump by means of beam pumping, long stroke or hydraulic pumping unit by controlling velocity, acceleration and torque of the electric prime mover or by controlling pressure and flow rate in hydraulically actuated sucker rod pumping system.

The invention discloses a magic expansible broom, which comprises a support seat. An operating rod is mounted on the support seat. A step and a groove are arranged at the front end of the support seat, a support rod is disposed in the groove, two front support boards are movably mounted on the support rod, hinge ends of the support boards are respectively inset into the step, the other end of one front support board and the other end of the other front board are hinged to rear support boards respectively, and the other end of one rear support board and the other end of the other rear support board are respectively hinged to the rear end of the support seat. A locking block is mounted on the support seat at an opening of the groove. Elastic rods are hinged to front two sides of the support seat respectively, and one end of one elastic rod and one end of the other elastic rod are hinged to the inner side of one front support board and the inner side of the other front support board respectively. A three-way limit switch mounting hole is reserved on the support seat behind the groove, and a limit switch is mounted in the three-way limit switch mounting hole and used for fixation and for limiting the distances from the support seat to the front support boards and the rear support boards. The lower end of each of the front support boards and the rear support boards is provided with bristles. The magic expansible broom can be used for cleaning garbage and pushing garbage, so that cleaning efficacy is improved greatly. The magic expansible broom is suitable for large-scale production, production efficiency is high, bamboo and wood resources are economized, and the ecological environment is protected.

The invention discloses a magic expansible broom, which comprises a support seat. An operating rod is mounted on the support seat. A step and a groove are arranged at the front end of the support seat, a support rod is disposed in the groove, two front support boards are movably mounted on the support rod, hinge ends of the support boards are respectively inset into the step, the other end of one front support board and the other end of the other front board are hinged to rear support boards respectively, and the other end of one rear support board and the other end of the other rear support board are respectively hinged to the rear end of the support seat. A locking block is mounted on the support seat at an opening of the groove. Elastic rods are hinged to front two sides of the support seat respectively, and one end of one elastic rod and one end of the other elastic rod are hinged to the inner side of one front support board and the inner side of the other front support board respectively. A three-way limit switch mounting hole is reserved on the support seat behind the groove, and a limit switch is mounted in the three-way limit switch mounting hole and used for fixation and for limiting the distances from the support seat to the front support boards and the rear support boards. The lower end of each of the front support boards and the rear support boards is provided with bristles. The magic expansible broom can be used for cleaning garbage and pushing garbage, so that cleaning efficacy is improved greatly. The magic expansible broom is suitable for large-scale production, production efficiency is high, bamboo and wood resources are economized, and the ecological environment is protected.

In one embodiment of the present invention, a position-based dynamics (PBD) framework provides realistic modeling and simulation for elastic rods. In particular, the twisting and bending physics of elastic rods is incorporated into the PBD framework. In operation, an elastic rod model generator represents the center line of an elastic rod as a polyline of points connected via edges. For each edge, the elastic rod model generator adds a ghost point to define the orientation of a material frame that encodes the twist of the edge. Subsequently, a PBD simulator solves for positions of both points and ghost points that, together, represent the evolving position and torsion of the elastic rod. Advantageously, the ghost points enable more realistic animation of deformable objects (e.g., curly hair) than conventional PBD frameworks. Further, unlike force based methods, elastic rod simulation in the PBD framework performs acceptably in environments where speed is critical.

A pedicle screw with a closure device including a seat element and a closure cap for quick closure of the seat element of the pedicle screw. An elastic rod element inserted therein in the seat recess, which element serves to stabilize a vertebral column, is held in a form-locking way. The closure cap of the closure device has the function of a cross-brace, and can transfer the forces absorbed by it from the rod element to the pedicle screw. Disposed on the closure cap with a holding recess are engagement elements which, during insertion of the closure cap, automatically lock in place in a stable position in the seat element provided with a U-shaped seat recess. The seat recess and the holding recess preferably have a ridged or grooved structure corresponding to the rod element used.

An apparatus for shifting the body weight of a runner from a runner's legs to a wheeled frame for enhancing the runner's performance and minimizing leg strain comprises a loop of elastic rod-shaped material stretchable during standing and during running movement. A base bend of the elastic is secured to a pelvic harness at the top of the back of each leg, and another bend of the elastic is secured to the wheeled frame. A third bend is supported on pulleys mounted on a height adjustable tee on the wheeled frame. This brings about a significant shift of the runner's weight from the runner's legs to the wheeled frame.

The invention discloses an extendable embedded type device for fixing and recovering a microseismic sensor and method of using the same. The device comprises three parts of a protective cover, a connecting sleeve, an extendable supporting and fixing structure. The protective cover is composed of a fit cone, a fixing shaft and a cover wall with a mesh. Two ends of the connecting sleeve are respectively provided with internal and external threads. The extendable supporting and fixing structure is composed of a supporting shaft, a connecting ring, a "skeleton", a limit bolt, a limit groove, a supporting pipe, an elastic rod, an elastic cap with a baffle and an elastic shaft. The fit cone at one end of the protective cover is in close contact with coal. A microseismic sensor is located in the protective cover and fixed on the fixing shaft of the protective cover. The other end of the protective cover is connected with one end of the connecting sleeve through the internal thread. The other end of the connecting sleeve is connected with the supporting shaft of the fixing structure through the internal thread. The elastic cap with the baffle is screwed on, the elastic rod is supported tightly, and the supporting pipe is pushed to enable the "skeleton" to open so that the entire device is embedded, supported and fixed into the coal of a drilling hole. In the recovery, the elastic cap is screwed off, the supporting pipe is pulled to enable the "skeleton" structure to close, and the elastic rod, the connecting sleeve, the protective cover and the senor are removed in sequence.

A telephone includes a handset, a base and a hook. The handset includes a earpiece defining a slot. The base defines a first recess and an opening. The first recess is configured for receiving the earpiece. The opening includes a second recess and a through hole defined in a bottom of the second recess. The hook includes a head and an elastic rod protruding from the head. The rod is rotatably received in the through hole. The head is received in the second recess and able to rotate and insert into the slot for supporting the handset.

An orthosis for correcting spinal deformities by urging spinal vertebrae toward a vertical axis. The orthosis includes a series of retaining clamps fixed onto the spinous process of said vertebrae, each of said retaining clamps having guides for retaining at least one elastic rod.

The present invention relates to robot technology. The miniature creeping vehicle includes main mechanism, control system and power supply. The main mechanism includes front vehicle body, shape memory alloy driver, elastic rod, back vehicle body, wheel self-locking mechanism and front and back wheels. The shape memory alloy driver is connected to the front vehicle body and the back vehicle body via guide pulley and constitutes parallel mechanism with the elastic rod. The present invention has great pace length, can move inside an irregular curved pipe and provides cheap and convenient solution for the inspection and maintenance of miniature pipeline in nuclear power station, space shuttle, etc.

The invention discloses a flexible snakelike arm with variable rigidity. The flexible snakelike arm with the variable rigidity comprises a plurality of rigid-flexible units which are detachably connected into a whole; the rigid flexible units comprise rigid end plates, soft pneumatic artificial muscle groups, ultra-elastic multi-rod mechanisms and limiting partition plates; each ultra-elastic multi-rod mechanism comprises a plurality of ultra-elastic rods, one end of each ultra-elastic rod is assembled on one end plate, and the other end penetrates through the other end plate and then extend into the ultra-elastic rod of the adjacent rigid-flexible unit; the soft pneumatic artificial muscle groups comprise a plurality of pneumatic artificial muscles which are arranged between every two endplates and outside the ultra-elastic multi-rod mechanisms; the limiting partition plates are arranged outside the ultra-elastic multi-rod mechanisms in a sleeving mode; and the two adjacent rigid-flexible units are detachably connected through the end plates. The soft pneumatic artificial muscle groups are utilized to provide flexible bending motion capability, the plurality of ultra-elastic rodsplay a motion guiding role, and through the interaction force formed by the pneumatic artificial muscles and the super-elastic rods, the rigidity of the snake-shaped arm is variable and controllableso that the snakelike arm can reach different positions, and the motion precision of the operation end of the snakelike arm is thus improved.

The invention discloses a multifunctional obstacle avoiding garden trimming car which comprises a car body and a water tank. A rail frame is arranged on the right side of the car body. A movable blockis connected in the rail frame in a sliding mode. A lead screw is connected with the movable block in a threaded mode and connected with a first driving motor. A trimming device is fixedly connectedwith the right side of the movable block. By arranging an elastic rod and a trigger switch, the trimming device can efficiently avoid obstacles in the middle of a greening belt, the trimming continuity is ensured, and the trimming efficiency is greatly improved; by arranging a plurality of trimming blade sets, the top face and the side faces of the greening belt are trimmed at the same time, and the trimming efficiency is improved; by arranging a sweeping device, broken leaves scattered on a road are efficiently and thoroughly swept away, labor is saved, and the sweeping efficiency is improved.

The invention relates to a real-time motion simulation method for a guide wire in a minimally invasive vessel interventional operation. The real-time motion simulation method comprises the following steps: (1) adopting a triangular surface mesh to perform modeling of a vessel; (2) adopting a Kirchhoff elastic rod model to perform modeling of the guide wire, and utilizing a Lagrange equation to calculate deformation force of the guide wire in the simulation process; (3) rendering the guide wire; (4) adopting a K-DOPS tree to perform collision detection between the guide wire and the vessel; (5) adopting a non-iterative restraint method to calculate contact force between the guide wire and the vessel and performing collision response; (6) using a Verlet integral formula to perform iteration update on position and speed of the guide wire; (7) utilizing Lagrange's multiplier and a fast projection method to achieve non-telescopic characteristics of the guide wire; and (8) using a force feedback device Phantom Omni to render acting force of the guide wire on a user. Compared with the prior art, the real-time motion simulation method has the advantages of being stable and reliable, convenient to achieve, real, efficient and high in engineering applicability and the like.

The invention discloses a variable-length bendable fully-flexible mechanical arm structure. The structure is a fully-flexible mechanical arm device having a posture controlled by elastic rods, capable of telescoping, and having a tail-end position capable of achieving any point in 360 degrees. The flexible mechanical arm device is composed of the elastic rods, a base, springs, metal section sheets, binding belts and U-shaped buckles. The four elastic rods are driven through slide tables of servo motors, thus posture control for the flexible mechanical arm and position control for a free end at the top are realized. The structure is reliable in stability and complete in function, and the tail-end position is capable of achieving any position in an outer envelope surface.

The invention discloses a central air conditioner cleaning device. The central air conditioner cleaning device comprises a first supporting arm and a second supporting arm which are distributed in the radial direction of a ventilation pipe of a central air conditioner. A first crawler belt is installed at one end of the first supporting arm, a second crawler belt is installed at one end of the second supporting arm, a lead screw is installed between the center of the first supporting arm and the center of the second supporting arm, the lead screw is in transmission linkage with a power device, the lead screw is sleeved with a lead screw nut, a radial elastic rod is installed on the lead screw nut, and a brush is installed at one end of the elastic rod. The central air conditioner cleaning device has the advantages of being compact in structure, good in cleaning effect and the like.

The invention relates to a temperature self-compensating type fiber grating strain transducer which comprises a first solenoid, a second solenoid, a metal tube, an elastic rod, fiber gratings, an outer tube and a mounting base, wherein two nuts are arranged on the solenoids; the first solenoid is in threaded connection with the left end of the metal tube; the left end of the elastic rod is connected with the right end of the metal tube to be extended into the metal tube; the right end of the elastic rod is connected with the second solenoid; the fiber gratings are welded at two ends of the elastic rod; the outer tube is sleeved on the exterior of the metal tube; and the mounting base is fixedly connected with a detected substrate. In the temperature self-compensating type fiber grating strain transducer, under a stress-free condition, a wavelength value does not change with the change of temperature, thereby achieving a temperature self-compensating effect. The change in stress of the detected substrate is directly reflected by a change data of wavelength of one fiber grating. The bottom of the base is welded with the surface of a reinforcing steel bar, thereby testing the change in stresses on the surfaces of concrete, reinforcing steel bar and steel structure and achieving monitoring and preventing functions. The silicone oil filled in the transducer can prevent interior parts from being oxidized or corroded after air enters.

The invention relates to a measuring tool for the turning radius of a high-voltage cable. The measuring tool is mainly characterized by comprising a horizontal straight ruler and an elastic rod, wherein a fixed end of the elastic rod and one end of the horizontal straight ruler are firmly arranged together; a movable end of the elastic rod is movably arranged in a slide way formed in the surface of the horizontal straight ruler; and when the movable end of the elastic rod is stressed by external force towards the fixed end, the elastic rod naturally forms a circular arc with varying radius. The invention provides a tool for directly measuring the turning radius of the high-voltage cable, wherein the horizontal straight ruler carved with the turning radius is connected with the elastic rod, external force is applied through the movable end of the elastic rod to drive the elastic rod to form the circular arc overlapped with the high-voltage cable, and the graduation at the junction of the horizontal straight ruler and the elastic rod is directly read to acquire the turning radius of the circular arc of the cable. The measuring tool has high measuring accuracy, is convenient to use and has a wide measuring range.

The invention discloses a skeleton-type multi-chord pulling underwater robot fish, and relates to a bionic underwater vehicle. The skeleton-type multi-chord pulling underwater robot fish comprises a fish head, a pectoral fin, a tiller, a steering engine, a steering engine frame, a first joint, a second joint, a tail fin, pulling chords, universal joints, a cabin, a back fin, a counterweight cabin, a control device and a detection module, wherein the pectoral fin is fixed onto a slender rod of the fish head, the tiller is engaged with the steering engine, the steering engine is arranged in the steering engine frame, the steering engine frame is connected with the cabin and connected with the first joint through the universal joints, the first joint is connected with the second joint through the universal joints, an elastic rod serving as a spine is additionally mounted between the first joint and the second joint, a bolt penetrates a circular hole at the joint of the second joint and the tail fin and is connected, the pulling chords penetrate holes in two sides of the first joint and the second joint, one end of each pulling chord is fixed onto the tiller, the other end of each pulling chord is fixed onto the second joint, the back fin and the fish head are integrated, the control device is arranged in a cavity of the cabin, the counterweight cabin is arranged in an inner cavity of the fish head, the control device is provided with a battery, a main control board and a communication module, and the detection module is arranged in the front of the inner cavity of the fish head.

The invention discloses an elastic rod guiding type capsule endoscopy robot parking and pose adjusting device and method and relates to an endoscope micro capsule robot. The elastic rod guiding type capsule endoscopy robot parking and pose adjusting device comprises a capsule casing, a driving motor, a screw nut mechanism, a guiding mechanism and a foldable mechanism; The driving motor drives a screw to rotate to drive a nut to move along the guiding rod and enable the foldable mechanism to collect and release to achieve robot parking and positioning; or the screw drives the nut to rotate relative to the foldable mechanism which is folded and positioned inside an intestinal tract to drive a capsule function cabin to rotate surrounding an axis and accordingly pose of the robot is adjusted. The capsule casing and an elastic skin which covers the foldable mechanism defines the integral capsule endoscopy robot to be a seal chamber. The elastic rod guiding type capsule endoscopy robot parking and pose adjusting device has the advantages of enabling the structure to be simple through an under-actuated mode; solving the problems that the capsule endoscopy robot is large in size, swallow is not easy, and wriggle inside the intestinal tract is difficult; achieving omnibearing diagnosis and treat of a gastrointestinal tract of a patient.

The invention discloses a space debris recovery control method based on a tethered technology. The space debris recovery control method is characterized by comprising the following steps that 1, the tether elasticity is considered, a space tethered debris system is researched by adopting an elastic rod module, and a system dynamics differential equation is built according to a class II Lagrange equation; 2, the system dynamics equation in the step 1 is rewrote into a non-dimensional system dynamics equation; 3, the in-surface outer pivot angle vibration abatement problem of nonlinear time-varying system dynamics equation in the recovery process is researched, and the tether length change analysis control law and the in-surface pitch angle value range in the expectation equilibrium position in the debris recovery process are inferred; and 4, the stability of the system and the value range, keeping stable asymptotically, of a pitch angle in an expectation surface are further analyzed through the Floquet theory. Through the space debris recovery control method, the effect that debris is stably recovered nearby an on-orbit spacecraft can be ensured, and meanwhile the safety in the recovery process especially the safety in the end time can be ensured.

The invention relates to a Hopkinson press rod system with true triaxial dynamic loading and testing functions and a method. By using a true triaxial Hopkinson rod device, and imposing a controllablesingle-shaft impact overload on a fixed substrate (basis) of a triaxial high g value accelerometer, by use of the Poisson effect of an elastic substrate, synchronous overload is generated in other twovertical (auxiliary axes Y and Z) directions which are perpendicular to the loading (main axis X) direction. Based on a triaxial direction elastic rod, the accelerator triaxial g value response is acquired, so it is achieved that dynamic calibration is simultaneously performed on the triaxial high g value accelerometer in three orthogonal directions. The beneficial effects are that the Hopkinsonpress rod system is not only an excitation signal generator, but also a signal acquirer. Thus, a complex decoupling structure can be avoided; simultaneous loading in three directions can be achieved;single-axis or bi-axis dynamic characteristic calibration can be performed; and the system is widely applicable, simple in operation, high in repeatability and high in measurement precision.

The proposed heat sink assembly mounted on a heat source includes a heat sink including a base with a top surface and a plurality of fins, and a retaining device including a frame with a top, a hole with a size larger than that of the base, an elastic rod connected with the frame, extending into the hole and having and end portion protruding towards the hole and pushing the heat sink and a plurality of retaining plates extending downwards from one of the first two and the second two opposite sides. Each of the retaining plates has a barb mounting the heat sink on the heat source and making the top surface raise through the hole to a same height of the top to facilitate the heat dissipation.

The invention discloses an automatic straightening device and method for a scraper conveyer body of a fully mechanized coal mining face. The automatic straightening device comprises an elastic rod and a relative pose measuring device, wherein the elastic rod is arranged between any two adjacent hydraulic supports, and an angle transducer is arranged between the elastic rod and each of the two adjacent hydraulic supports; the relative post measuring device comprises an elastic connector arranged between any two adjacent middle troughs and provided with a strain transducer with the temperature compensation function; the angle transducers and the strain transducer are connected with a signal processing system through communication lines; the signal processing system communicates with an electrohydraulic control system through a data transmission module; and the electrohydraulic control system is connected with the hydraulic supports. According to the automatic straightening method, a voltage signal received by the electrohydraulic control system serves as the judgment reference, and corresponding actions are respectively implemented on the hydraulic supports and the scraper conveyer according to actual working conditions, so that positioning of the hydraulic supports and straightening control of the middle troughs of the scraper conveyer are realized, the straightening period is greatly shortened and the production efficiency is improved.