100 results about "Shock wave device" patented technology

Described herein are shock wave devices and methods for the treatment of calcified heart valves. One variation of a shock wave device includes three balloons that are each sized and shaped to fit within a concave portion of a valve cusp when inflated with a liquid and a shock wave source within each of the three balloons. Each balloon is separately and/or independently inflatable, and each shock wave source is separately and/or independently controllable. Methods of treating calcified heart valves using a shock wave device can include advancing a shock wave device having one or more balloons and a shock wave source in each of the balloons to contact a heart valve, inflating the one or more balloons with a liquid such that the balloon is seated within a concave portion of a valve cusp, and activating the shock wave source.

Described herein are shock wave devices and methods for the treatment of calcified heart valves. One variation of a shock wave device may comprise an elongated flexible tube carried by a sheath. The tube may have a fluid input end, which may be located near a proximal end of the sheath. The tube may include a loop portion. The loop portion may be configured to be at least partially accommodated within a cusp of the heart valve. The tube may be fillable with a conductive fluid. In some variations, the shock wave device may include an array of electrode pairs associated with a plurality of wires positioned within the loop portion of a tube. The electrode pairs may be electrically connectable to a voltage source and configured to generate shock waves in the conductive fluid in response to voltage pulses.

Described here are devices and methods for forming shock waves. The devices may comprise an axially extending elongate member. A first electrode pair may comprise a first electrode and a second electrode. The first electrode pair may be provided on the elongate member and positioned within a conductive fluid. A controller may be coupled to the first electrode pair. The controller may be configured to deliver a series of individual pulses to the first electrode pair, where each pulse creates a shock wave. The controller may cause current to flow through the electrode pair in a first direction for some of the pulses in the series and in a second direction opposite the first direction for the remaining pulses in the series.

Described herein is a shock wave device for the treatment of vascular occlusions. The shock wave device includes an outer covering and an inner member inner connected at a distal end of the device. First and second conductive wires extend along the length of the device within the volume between the outer covering and the inner member. A conductive emitter band circumscribes the ends of the first and second wires to form a first spark gap between the end of the first wire and the emitter band and a second spark gap between the end of the second wire and the emitter band. When the volume is filled with conductive fluid and a high voltage pulse is applied across the first and second wires, first and second shock waves can be initiated from the first and second spark gaps.

The invention discloses a laser drilling device assisted by laser-induced impact waves. The laser drilling device comprises four modules, namely, a workpiece clamping device, a laser drilling device, a device capable of allowing a laser to induce the impact waves and a control system device, wherein the laser drilling device and the device capable of allowing the laser to induce the impact waves are arranged on the workpiece clamping device from top to bottom, and the control system device is connected with the laser drilling device and the device capable of allowing the laser to induce the impact waves through cables. According to the laser drilling device assisted by the laser-induced impact waves, the depth limit of laser drilling can be improved, the thickness of a recast layer can be lowered, the micro-crack producing rate can be lowered, the laser drilling efficiency can be improved, and the laser drilling device can be applied to laser drilling of medium plates and thick plates.

The invention discloses a two-phase shock wave swing link movable-teeth compound transmission speed reducer and relates to the technical field of mechanical transmission. The compound transmission speed reducer mainly comprises a two-phase shock wave device, movable teeth, a swing link, a pin shaft, a movable-teeth frame, a central wheel and a fixed axis gear train which is embedded into the shock wave device. The exterior of the shock wave device has a cam profile and the interior of the shock wave device has an inner gear ring profile; an input gear is engaged with a pinion and the pinion is engaged with the inner gear ring so as to form the fixed axis gear train; the input gear and an input shaft are integrated; the rotation of the input gear is decelerated through the fixed axis gear train and drives the shock wave device to rotate; the shock wave device and the movable teeth are in rolling contact engagement, so that the movable teeth swing along with the swing link and moves along the tooth profile of the central wheel simultaneously; and the shock wave device and the central wheel coact to make the movable teeth drive the movable-teeth frame to rotate and output power through the swing link. By setting pre-deceleration in swing link movable-teeth transmission, the transmission ratio is increased, and the problem of over-high temperature rise of movable-teeth transmission is also solved; and the speed reducer has the advantages of novel and compact structure, high bearing capacity, self-balancing stress and the like, and is suitable for decelerating transmission between two coaxial shafts.

The invention discloses an oscillating bar oscillating tooth speed reducer with a clearance eliminating mechanism. A center through hole of a center wheel of the oscillating bar oscillating tooth speed reducer is provided with an oval shock wave device coaxial to the center wheel. The position between the inner tooth profile of the center wheel and the peripheral face of the shock wave device is provided with an annular oscillating tooth frame, wherein the end face of the annular oscillating tooth frame is lower than the end face of the center wheel, the inner diameter of the annular oscillating tooth frame is larger than the major diameter of the shock wave device, and the outer diameter of the annular oscillating tooth frame is smaller than the inner tooth profile. The oscillating toothframe is provided with 3-6 evenly-distributed oscillating bar oscillating teeth. Each oscillating bar oscillating tooth comprises an upper component, a lower component, an upper inner component, a lower inner component and an elastic assembly. According to the adopted oscillating bar oscillating teeth, resilience generated due to spring elastic deformation can be used for automatically adjusting the relative distance between upper wheels and lower wheels of the oscillating bar oscillating teeth, impacts and vibration generated by an oscillating tooth gear in the running state during clearanceeliminating are eliminated, and the effects of buffering and vibration absorbing are achieved. According to the adopted oscillating bar oscillating teeth, accurate clearance adjustment can be achievedfor response of electrostriction elements to electric signals, and the situation of influences on the transmission performance due to the clearance generated due to abrasion and other reasons is greatly improved.

The invention provides a movable tooth cam mechanism capable of achieving single-shaft constant-speed input and double-shaft variable-speed swing output, and belongs to the technical field of mechanical transmission. The mechanism comprises an input shaft, an input plate, inner steel balls, outer steel balls, a movable tooth rack, an inner swing plate, an outer swing plate, an inner output shaft, an outer output shaft and a machine frame. The input shaft and the input plate are fixedly connected into a whole to constitute a shock wave device. The movable tooth rack is fixedly connected to the machine frame. The inner steel balls are evenly distributed in inner radial grooves distributed in the movable tooth rack in the circumferential direction respectively and are located in interlacing areas of an inner transverse tooth profile groove of the input plate and transverse tooth profile grooves of the inner swing plate respectively all the time, and the outer steel balls are evenly distributed in outer radial grooves distributed in the movable tooth rack in the circumferential direction respectively and are located in interlacing areas of an outer transverse tooth profile groove of the input plate and transverse tooth profile grooves of the outer swing plate respectively all the time. The inner swing plate is fixedly connected with the inner output shaft, and the outer swing plate is fixedly connected with the outer output shaft. Through the movable tooth cam mechanism, single-shaft constant-speed input and double-shaft simultaneous variable-speed swing output can be achieved, and the swing direction, the swing angle, the swing law and the bearing capacity can be combined according to practical situations; on the premise that using conditions are met, the functions of the mechanism are maximized.

The invention relates to an external wave type compound rolling moveable teeth speed reducer which comprises a compound shock wave device, moveable teeth, a moveable teeth frame, waveform wheels and a frame, wherein the compound shock wave device is composed of an input shaft, a small gear, a big gear, a locking cover, an eccentric shaft, a shock wave disk I and a shock wave disk II; when the small gear is driven to rotate by the input shaft, the big gear is engaged with the exterior of the small gear and the big gear and the eccentric shaft fixedly connected with the locking cover are driven to rotate; the eccentric shaft is used for driving the shock wave disk I and the shock wave disk II to eccentrically rotate, thereby realizing the contact engaging of the shock wave disks I and II and the moveable teeth and the radial motion of a moveable teeth pin shaft along a radial slot of the fixed moveable teeth frame; and meanwhile, the moveable teeth frame is fixedly connected with the frame and the moveable teeth and keeps contact with the waveform wheels I and II all the time, so that the moveable teeth are forced to drive the waveform wheels I and II to rotate, thereby realizing the motion and power transfer between the input shaft and an output shaft. The external wave type compound rolling moveable teeth speed reducer has the characteristics of wide speed ratio scope, strong bearing capacity, excellent processing manufacturability of the waveform wheels, static balance of the force born by the whole transmission device, and the like.

The invention discloses a double-shock-wave roller column movable tooth speed reducer with a gap eliminating mechanism. The double-shock-wave roller column movable tooth speed reducer mainly comprisesa first eccentric circle shock wave device, a second eccentric circle shock wave device, conical roller column movable teeth, a first center wheel, a second center wheel, a movable teeth frame, a shell, an input shaft and an output shaft. The two rows of conical roller column movable teeth are symmetrically arranged in opposite directions. The first eccentric circle shock wave device and the second eccentric circle shock wave device are arranged in opposite directions with a 180-degree phase difference. The conical roller movable teeth are adopted, so that the bearing capacity of the speed reducer can be improved, and gaps can be eliminated by adjusting the axial position. The input shaft is connected with the first eccentric circle shock wave device and the second eccentric circle shockwave device through a spline structure. Threads are machined at the two ends of the spline section to be connected with round nuts. Spring devices are arranged on the inner sides and outer sides of the first eccentric circle shock wave device and second eccentric circle shock wave device at the same time. The shock wave devices are pushed by elastic force to axially move to realize the function ofgap elimination. The bearing capability and the centering performance of the shock wave device and a shaft are improved by a spline. The elastic force of a spring is controlled through threaded connection.

Devices and methods for generating acoustic shock wave within a cavity is disclosed. The shock wave device optionally includes a housing having a cylindrical portion and a cone frustum portion. The housing optionally forms a cavity configured to receive a penis. The shock wave device optionally includes a plurality of shock wave generators and a coupling assembly having a deformable sac configured to hold shock wave transmitting liquid. The volume of the transmitting liquid is optionally increased or decreased as needed so that the coupling assembly can conform to the shape of the penis. The shock waves generated optionally has an intensity gradient within the cavity of the shock wave device, where the intensity gradient is optionally controllable using a control and power supply unit.

The invention provides a novel cycloidal sliding-tooth reducer suitable for a robot joint. The cycloidal sliding-tooth reducer is composed of an input shaft, an eccentric bushing, cycloidal gears, pin gears, pin gear shells, shock wave devices, sliding teeth, sliding tooth frames, ring gears and other main parts. Power of the reducer is input through the input shaft, transmitted through the eccentric bushing, the cycloidal gears, the shock wave devices and the sliding teeth and finally output through the sliding tooth frames. Compared with RV reducers which are adopted by most existing robots, according to the cycloidal sliding-tooth reducer, gear input mechanisms and W output mechanisms of the RV reducers are omitted, and the cycloidal sliding-tooth reducer has the advantages of being small in axial size, low in weight, good in rigidity, compact in structure, capable of achieving large transmission ratio easily and the like.

Devices and methods for generating acoustic shock wave within a cavity is disclosed. The shock wave device optionally includes a housing having a cylindrical portion and a cone frustum portion. The housing optionally forms a cavity configured to receive a body appendage. The shock wave device optionally includes a plurality of shock wave generators and a coupling assembly having a deformable sac configured to hold shock wave transmitting liquid. The volume of the transmitting liquid is optionally increased or decreased as needed so that the coupling assembly can conform to the shape of the body appendage. The shock waves generated optionally has an intensity gradient within the cavity of the shock wave device, where the intensity gradient is optionally controllable using a control and power supply unit.

The present invention discloses a bin automatic frequency-adjustment anti-clogging machine, including an arch eliminating plate, a shock wave unit, a bin wall, bin holes, a shock wave device, a chute,solid rubber springs, hollow T-rubber springs, a bin bolt, shock blocks, a shock wave string, and a shock wave adjusting button. The characteristics of the machine are as follows: vector decomposition is performed on an arched adhesive wall, low frequency vibration is subjected to kinetic momentum buffering, asynchronous multiplication for kinetic momentum conduction is realized, the whole material molecular structure is changed, resonance splitting is generated, and bin cleaning and clogging prevention are realized. The machine can be installed on storage bins, buffering bins, front furnacebins, raw coal bins, clean coal bins, under-shaft bins and standby coal bins, replaces air cannons, bin wall vibration machines, glass-ceramic plates, high molecule plates, loosening machines, rotaryloosening machines, blasting and artificial cleaning modes, saves manual operation and cost, and can facilitate dispersion.

Apparatus and methods for ethanol production use shock waves to increase the conversion of starch and/or cellulosic material into sugar. The shock waves may also control bacteria levels in the ethanol production facility. The shock waves may be generated by a shock wave generator that includes a pulsed electric field generator such as a Marx generator, which may have one or more semiconductor switches.