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106results about How to "Effective buffer" patented technology

Wind power tower drum steel strand steering gear

The utility model provides a wind power tower drum steel strand steering gear which comprises a tower drum body and a steel strand vertically arranged in the tower drum body and further comprises an I-shaped beam and a buffering sleeve. A first flange and a second flange are arranged on the I-shaped beam; the first flange is fixed on the inner side wall of the tower drum body; the buffer sleeve is wound on the peripheral wall of the steel strand and is used for abutting against the second flange; according to the utility model, the steel strand can be vertically arranged, the steel strand is effectively prevented from being attached to the inner side wall of the tower drum, and the steel strand and the inner wall of the tower drum are prevented from being abraded.
Owner:NINGHAI COUNTY JULI LIFTING CO LTD

Movable mixer for organic fertilizer production

The utility model relates to the technical field of organic chemical fertilizer mixing, and discloses a movable mixer for organic chemical fertilizer production, which comprises a stirring box, a connecting plate, a plurality of support plates, a support frame and a control box, the support frame is arranged at the lower end of the stirring box, the plurality of support plates are respectively arranged on the lower end surface of the support frame in a front-back manner and close to two sides, and the control box is connected with the connecting plate. The control box is arranged on one side wall of the front supporting plate, the connecting plate is arranged at the lower ends of the supporting plates, a plurality of grooves are formed in the upper portions of the two side walls of the connecting plate in a front-and-back mode, first buffering pads are arranged in the grooves, and the lower ends of the supporting plates are arranged in the first buffering pads correspondingly; an adjusting structure is arranged on the lower end face of the connecting plate. According to the device, the whole device is moved through the four moving modules, the base is tightly attached to the ground after storage, the stability is improved, the levelness of the connecting plate is adjusted in cooperation with the adjusting structure, and the mixing efficiency is improved.
Owner:HEILONGJIANG IVEKO BIOTECHNOLOGY R&D CO LTD

Motor vehicle detection auxiliary equipment

The utility model relates to the technical field of motor vehicle detection, and discloses a motor vehicle detection auxiliary device which comprises a detection table, the right side of the detection table is fixedly connected with an inclined plate, the surface of the inclined plate is provided with an anti-skid groove, the middle of the interior of the detection table is provided with a detection opening, and the two sides of the detection table are fixedly connected with supporting frames. A lighting lamp is fixedly connected to the top of the supporting frame, a limiting mechanism is arranged on the right side of the bottom of the detection table, and a buffering mechanism is arranged on the left side of the top of the detection table. According to the motor vehicle detection auxiliary equipment, a motor vehicle can be limited through the arranged limiting mechanism and limiting plate, the phenomenon that the motor vehicle slips on a slope due to the fact that a hand brake is forgotten to be pulled is avoided, and the safety of the motor vehicle in the detection process is ensured; the impact force can be effectively buffered, the phenomenon that the head of the motor vehicle is damaged due to the fact that the impact force is too large is avoided, and the effect of protecting the head of the motor vehicle is achieved.
Owner:YIBIN RUNJIA MOTOR VEHICLE INSPECTION CO LTD

Unmanned aerial vehicle intelligent high and cold ecological monitoring device

The invention relates to the field of unmanned aerial vehicle monitoring, and discloses an unmanned aerial vehicle intelligent high and cold ecological monitoring device which comprises a vehicle body, unmanned aerial vehicle arms, undercarriages, propeller blades, motors, cameras, heating plates and rubber non-slip mats. A top shell is installed at the top of the vehicle body, the lower portion of the top shell is connected with an unmanned aerial vehicle arm through a side frame, the unmanned aerial vehicle arm is of a hollow structure, and a cable channel is formed in the unmanned aerial vehicle arm and used for containing a cable to connect a motor and a motor. An undercarriage is fixed to the unmanned aerial vehicle arm, a shell is installed at the tail end of the undercarriage, propeller blades are connected with a motor through the shell, and the motor is installed below the shell and used for driving the propeller blades. Through flexible adjustment of the angles of the propeller blades, the inclination angles of the blades can be automatically adjusted according to the real-time wind speed and airflow changes, it is ensured that in the high and cold environment with strong wind or unstable airflow, the influence of wind on the flight stability of the unmanned aerial vehicle is effectively reduced, and the wind resistance of the unmanned aerial vehicle under the severe weather condition is improved.
Owner:LANZHOU JIAOTONG UNIV

Unmanned aerial vehicle for construction site environment investigation

The utility model provides an unmanned aerial vehicle for construction site environment investigation, which comprises an unmanned aerial vehicle main body, the bottom of the unmanned aerial vehicle main body is fixedly provided with a fixed mounting frame, the bottom of the fixed mounting frame is fixedly provided with two fixed mounting plates, the bottoms of the two fixed mounting plates are fixedly provided with fixed mounting rods, and the fixed mounting rods are fixedly connected with the unmanned aerial vehicle main body. And the number of the fixed mounting rods is six, sliding rods penetrate through one ends of the tops of the six fixed mounting rods, and bottom buffer plates are fixedly mounted at the bottom ends of the six sliding rods. When the unmanned aerial vehicle falls down, a bottom buffer plate firstly makes contact with the ground, impact force can be generated in the landing process, at the moment, a sliding rod slides, a buffer spring is compressed, then the impact force generated in the landing process is effectively buffered and reduced, after the impact force is completely absorbed, the buffer spring is reset, a fixed mounting rod is jacked up, and the unmanned aerial vehicle is effectively protected; meanwhile, a plurality of bottom buffer plates are convenient to land on an uneven ground place, so that the landing safety is improved, and investigation on a construction site is convenient.
Owner:JIANGMEN CONSTR SUPERVISION CONSULTING CO

Method for coordinated unloading, support, and filling of roadways along the goaf in steeply inclined fully mechanized coal seams

ActiveCN119878164BLarge operating spaceImproved stress distribution characteristicsUnderground chambersUnderground miningLongwall miningMining engineering
This invention discloses a method for coordinated unloading-support-filling roadway protection in a longwall mining face of a steeply inclined coal seam. The method includes: arranging pre-reinforcing anchor bolts and cables at certain intervals in the transport roadway to reinforce the transport roadway in advance; pre-excavating a gap in the upper side of the transport roadway by blasting, and adding reinforcing anchor bolts and cables to the cross-section of the pre-excavated gap; arranging pressure-relief boreholes at certain intervals in the center of the coal seam roof at the pre-excavated gap, and implementing pressure-relief blasting after the support is moved; using I-beams and retractable modular roadway protection supports as the first and second layers of rock-blocking support, respectively; filling and sealing the goaf area above and on the sides of the retractable modular roadway protection supports with local filling materials; and arranging single hydraulic props for delayed support at a certain distance from the coal wall of the lagging face inside the roadway along the goaf. This method provides good support, significantly increases the speed of roadway retention in a longwall mining face of a steeply inclined coal seam, and effectively ensures safe and normal production.
Owner:XIAN UNIV OF SCI & TECH

Packaging bag exhaust device

The utility model belongs to the technical field of packaging bag production, and particularly relates to a packaging bag exhaust device which comprises a conveying frame. A pneumatic module is mounted in the middle of the conveying frame; a fixing frame is mounted at the output end of the pneumatic module; two connecting frames are mounted on the side wall of the conveying frame; the two connecting frames are oppositely arranged; a fixing frame is mounted in the middle of the two connecting frames; a mounting plate is mounted in the middle of the fixing frame; an exhaust sponge block is fixedly connected to the middle part of the mounting plate; a mounting assembly is arranged between the fixing frame and the mounting plate; a pressing assembly is installed in the middle of the conveying frame. The side wall of one fixing frame is fixedly connected with a connecting plate; bristles are fixedly connected to the middle of the connecting plate; a dust collection assembly is mounted in the middle of the connecting plate; by means of the structure, the exhaust sponge block can be rapidly replaced, the abraded sponge plate can be replaced in time, and the tedious steps of disassembling and assembling the exhaust sponge block through a tool are effectively reduced.
Owner:GOGLIO TIANJIN PACKAGING CO LTD

Reactor for servo driver adaptation

The utility model relates to the technical field of electric appliance elements, in particular to an electric reactor adaptive to a servo driver, which comprises a base, an electric reactor main body, a mounting seat, a positioning rod, a positioning plate, a sliding rod, a limiting seat, a limiting ring, a spring and a base plate, the electric reactor main body is mounted at the top end of the base, and the electric reactor main body is fixedly connected with the base through bolts; the mounting seat is mounted at the bottom of the base, and the mounting seat is connected with the base in an inserting manner; a positioning rod is mounted on the inner wall of the bottom of the base, and the positioning rod is connected with the base in a welding manner; the positioning plate is mounted on one side of the bottom of the mounting seat, and the positioning plate is connected with the mounting seat in a welding manner; by improving the reactor adaptive to the servo driver, the reactor has the advantages that the structural design is reasonable, the reactor main body is convenient to mount and dismount, and the anti-seismic property of the reactor is good, so that the problems and defects in the prior art and equipment are effectively solved.
Owner:SHANDONG ZHONGKE ELECTRIC CO LTD

Operation equipment for remote inspection and maintenance of power equipment

The utility model belongs to the technical field of remote inspection of electrical equipment, and discloses operation equipment for remote inspection and maintenance of electrical equipment, which comprises a buffer mechanism, an air bag is fixedly connected to the surface of a connecting frame, two grooves are formed in the top of the connecting frame, rotating frames are rotatably connected to the interiors of the grooves, and the rotating frames are fixedly connected to the surface of the connecting frame. According to the operation equipment for remote inspection and maintenance of the electrical equipment, by arranging an air bag and a reset spring, the device can be effectively buffered in the toppling process, when the device topples, the ground can abut against the air bag on the side face of the device firstly, and when the device topples, the air bag on the side face of the device abuts against the air bag on the side face of the device; the device is buffered for the first time through the air bag, then the connecting frame is extruded in the direction close to the base, the connecting frame extrudes the reset spring which is in the extruded state, the device is buffered for the second time, and the situation that the camera and other expensive structures collide with the ground and are damaged when the device topples over is avoided.
Owner:SHANGHAI RAILWAY BUREAU XUZHOU POWER SUPPLY SECTION +1

Damping and noise-reducing motor structure

The utility model provides a shock-absorbing and noise-reducing motor structure, which comprises a motor body, at least one elastic shock-absorbing pad is fixed on a shell of the motor body, and when the motor body is mounted in a mounting cavity of external equipment, the outer surface of the elastic shock-absorbing pad is propped against the inner wall of the mounting cavity; according to the utility model, the vibration noise of the motor in the operation process can be reduced.
Owner:WUHAN XIANJIE ELECTRONICS CO LTD

Positioning tool for numerical control machine tool

The utility model relates to the technical field of numerical control machine tools, and discloses a positioning tool for a numerical control machine tool, which comprises a positioning platform, a buffer component is arranged at the bottom of the positioning platform, and a fixing block, a limiting seat, a wrapping block, a positioning stop block and a positioning component are respectively mounted at the top of the positioning platform. An electric telescopic cylinder is installed on the inner wall of the fixing block, and the inner wall of the electric telescopic cylinder is slidably connected with one end of a telescopic rod. By pressing a control switch, an electric hydraulic cylinder can start to work, so that a hydraulic rod can drive a protective pad to fix and limit one side of a workpiece sample, a telescopic rod can slide out of the inner wall of an electric telescopic cylinder under the control of a controller, and a connecting column can limit the other side of the workpiece sample; and meanwhile, the device can clamp and position the workpiece sample according to the size of the workpiece sample, so that various use requirements are met, the use convenience is further improved, and the practicability of the device is improved.
Owner:YUNNAN XINGHONG MASCH MFG CO LTD

A press-fit device for a remote control housing

The utility model discloses a kind of pressing equipment of remote controller shell, it is related to pressing equipment technical field, including placing groove board and pressing plate, the inner cavity wall bottom of placing groove board is placed with positioning block, the front and rear side wall of positioning block is fixedly connected with adjusting tooth block, the inner cavity wall of placing groove board is opened with adjusting tooth slot in two sides, the bottom left side of pressing plate is fixedly connected with first pressing block, the bottom right side of pressing plate is equipped with second pressing block, adjusting pressing block is equipped between the first pressing block with the second pressing block, the pressing equipment of remote controller shell is positioned groove, adjusting tooth block and adjusting tooth slot by positioning block cooperation, so that in use can adapt to different size remote controller, so that applicability greatly improves, while conveniently and quickly fixed limit remote controller to facilitate subsequent pressing, support block is used to support remote controller when pressing, improve pressing effect while protecting remote controller button.
Owner:NANJING JIAHAO TECH CO LTD

Steel structure anti-seismic buffer base for constructional engineering

The invention discloses a steel structure anti-seismic buffer base for constructional engineering, which comprises a mounting seat, a support plate is arranged above the mounting seat, two groups of buffer mechanisms for buffering the support plate are mounted on the mounting seat, a buffer piston is slidably connected in a piston cylinder, the bottom of the buffer piston is fixedly connected with a buffer spring, and the buffer spring is fixedly connected with the bottom of the buffer piston. The lower ends of the buffer springs are fixedly connected with the inner bottoms of the piston barrels, the upper ends of the buffer pistons are rotationally connected with supporting rods, the upper ends of the supporting rods are in threaded connection with the bottom of the supporting plate, a fixing column is fixed to the mounting base, and an inner cavity connected with the two piston barrels is formed in the fixing column. And a damping piston capable of resetting is connected in the inner cavity in a sliding manner. The supporting plate can be effectively buffered in a multi-stage mode, then the steel structure can be effectively buffered and protected, the supporting plate can be conveniently detached and replaced, and operation is easy, convenient and fast.
Owner:NANTONG GEFUMA CONSTR MASCH CO LTD

A server reinforcement structure and server thereof

The invention discloses a server reinforcement structure and a server thereof, and relates to the technical field of servers; a cover plate is fixedly connected to a shell; a connecting seat is fixedly installed on the corner of the cover plate, a supporting column is slidably installed at the corner of the shell, and the length of the supporting column is greater than the thickness of the shell; mutually symmetrical buffer grooves are respectively provided in the areas where the supporting column fits on both sides of the shell, a supporting rod inserted into the buffer groove is installed on the connecting seat, a shock absorbing structure is installed in the buffer groove, and the supporting rod is connected with the shock absorbing structure by snapping; a groove is provided on the supporting column at a position fitting the surface of the shell, a plurality of primary springs are installed in the groove, the primary spring is connected to a sliding sleeve, a vertically protruding sliding bar is installed on the surface of the shell, and the sliding sleeve is sleeved on the sliding bar. The device can fully protect the server, and at the same time has the effect of shock absorption and buffering, thereby improving safety.
Owner:BEIJING ORIENTAL SENTAI TECH DEV CO LTD

Roller shutter type hanging wall

The utility model provides a roller shutter type vertical wall. The roller shutter type vertical wall comprises a transverse plate, a balance weight transverse rod, a rotating shaft, a driving motor, a control mechanism, a shutter face, two fixing plates, two guide sliding rails, two sliding table structures and four reinforcing installation structures. The upper portion of the curtain face is wound on a rotating shaft which is arranged between two fixing plates, the end of the rotating shaft is connected with one fixing plate through a driving motor, the two fixing plates are arranged on the lower end face of the transverse plate, and the driving motor is connected with a control mechanism. The balance weight cross rod is arranged at the bottom of the curtain face, the two sliding table structures are symmetrically arranged on the left side and the right side of the balance weight cross rod, each sliding table structure corresponds to one guide sliding rail and is in sliding connection with the guide sliding rail, and the upper end and the lower end of each guide sliding rail are each correspondingly provided with one reinforcing installation structure. The roller shutter type vertical wall solves the problem that due to the fact that the matching stability of a smoke blocking vertical wall and a guide rail in the related technology is poor, a shutter face shakes due to lack of enough support when moving up and down.
Owner:TIANJIN SENAO DOOR & WINDOW CO LTD

A material transfer equipment based on metal material processing

The present invention belongs to the technical field, specifically, a material transfer device based on metal material processing, including a guide rail, the inner wall of the guide rail is slidably connected with a moving base plate, a rolling component is arranged at the axis of the lower surface of the moving base plate, a clamping component is evenly arranged on the lower surface of the moving base plate, and a metal pipe is arranged on the inner wall of the clamping component. The device can clamp the two ends of the metal pipe through the arc-shaped concave plates that can be adjusted on both sides, and further limit the metal pipe through the side stop shells on the side, so that the clamped metal pipe will not slide out to both sides due to inertia along the inner wall of the arc-shaped concave plate when transferring, and the side stop shells are pressed against the side parts of the pipe body through round head buffer rods, so that the pipe body can be effectively buffered during the shaking process, so as to prevent the metal pipe from shaking and the suspension equipment clamping the pipe body from having safety hazards.
Owner:常州市岩棣达金属科技有限公司

A hot shrinkable waterproof cap injection molding demolding device facilitating material taking

This utility model discloses a demolding device for injection molding of heat-shrinkable waterproof caps that facilitates material handling. Specifically, it relates to a base, the top surface of which is equipped with a demolding mechanism and a cooling mechanism. The demolding mechanism, through a first motor driving a first reciprocating threaded rod to rotate, is adjusted according to the height of the heat-shrinkable waterproof cap mold. Simultaneously, a first damper moves a first T-shaped plate and the upper mold, effectively buffering the material and facilitating rapid processing and material unloading. The cooling mechanism, through a first hydraulic rod moving the lower mold to a suitable height, facilitates material handling within the mold. A water pump delivers cold water to the inside of a first annular pipe for rapid conveying to the support surface, thus facilitating production.
Owner:DONGYING LANTIAN PLASTIC CO LTD

Steel drum for radioactive waste disposal

ActiveCN222319767Uachieve sealingRealize sealed storageShieldingPortable shielded containers
The utility model discloses a steel drum for radioactive waste disposal, which comprises a lead plate outer barrel, a lead plate barrel cover capable of being fixedly connected with the lead plate outer barrel is assembled at the top end of the lead plate outer barrel, a metal inner container is placed in an inner cavity of the lead plate outer barrel, the metal inner container is a cylindrical barrel body with an opening in the top, and the metal inner container is made of stainless steel. An interlayer is reserved between the circumference of the outer wall of the metal inner container and an inner cavity of the lead plate outer cylinder, and an elastic buffering part is arranged in an inner cavity of the interlayer. The elastic buffering part comprises a plurality of mounting grooves, and the mounting grooves are formed in the circumference of the outer wall of the metal inner container at equal intervals. According to the steel drum for radioactive waste disposal, in actual use, sealed storage of radioactive waste can be achieved, meanwhile, good protection performance can be provided, and radiation leakage caused by equipment breakage can be effectively buffered when the steel drum is impacted by external force or subjected to large torsion in the transfer process.
Owner:HAINENG MASCH TECH (LIAONING) CO LTD

A solid water source irrigation system and irrigation method thereof

The present invention protects a solid water source irrigation system and an irrigation method thereof, which includes a transport and storage device encapsulating degradable capsule particles, a water-fertilizer integrated machine for sowing the capsule particles, and a water volume monitoring device for monitoring the degradation degree of the capsule particles. The transport and storage device transports the capsule particles to a transfer site, the water-fertilizer integrated machine at the transfer site is loaded with degradable capsule particles and sown to farmland, and the water volume monitoring device buried in the farmland monitors the degradation degree of the degradable capsule particles. The degradable capsule particles can achieve timed, quantitative and directional decomposition to meet the water needs of different crops; the transport and storage device provides buffer protection for the capsule particles to ensure that the capsule particles are not impacted; the water-fertilizer integrated machine integrates sowing and irrigation, and realizes sowing and irrigation at the same time; the water volume monitoring device obtains thermal imaging of the capsule particles through an infrared sensor, monitors the degradation degree of the capsule particles, obtains the amount of water consumed by the crop, and grasps the water storage status of the crop, so as to adjust the water supply in time.
Owner:NORTHWEST ENGINEERING CORPORATION LIMITED

An easy-to-install reinforced aluminum alloy profile structure

This utility model relates to the field of aluminum alloy profile technology and discloses an easy-to-install reinforced aluminum alloy profile structure, including an upper rounded corner anti-collision frame. This easy-to-install reinforced aluminum alloy profile structure uses connecting pins on the lower left and right sides of the upper rounded corner anti-collision frame to insert into connecting grooves on the upper left and right sides of the lower rounded corner anti-collision frame, protecting the inner aluminum alloy profile body from impacts and deformation at the four corners. Rubber buffer pads are adhered to the outer side for effective cushioning during collisions. During installation, a T-shaped connecting block on one side of the aluminum alloy profile body is inserted into a T-shaped groove on the side of another aluminum alloy profile body. Anti-slip pads are provided in the T-shaped grooves to increase friction between the two, preventing loosening after installation and ensuring installation stability. Installation is quick and efficient, requiring fewer connectors and complex tools.
Owner:LINYI TIDEXIN DOOR IND CO LTD

Intelligent automatic bag overturning gantry crane

The invention relates to an intelligent automatic bag turning gantry crane which comprises a rack and a bag turning device, the bag turning device comprises a plate hook mechanism and a supporting and turning mechanism, and the supporting and turning mechanism is installed at one end of the rack; the plate hook mechanism is installed on the machine frame, can reciprocate in the direction from one end of the machine frame to the other end of the machine frame and is used for hoisting and conveying the cinder ladles and conveying the cinder ladles to the supporting and overturning mechanism, and meanwhile the plate hook mechanism is matched with the supporting and overturning mechanism to conduct ladle overturning treatment on the cinder ladles. The slag ladle overturning device has the beneficial effects of being compact in structure, reasonable in design, capable of achieving stable conveying and overturning of slag ladles in the metallurgical operation process, high in operation efficiency, concentrated in slag dumping, convenient to conduct follow-up centralized treatment, safe and reliable.
Owner:WUHAN TIANWANG CRANE CO LTD

Electronic detonator carrying vehicle

The invention relates to the technical field of carrying vehicles and new energy vehicles, in particular to an electronic detonator carrying vehicle to solve the technical problem that detonators carried by existing new energy vehicles are prone to explosion. Comprising a vehicle body, a main storage tank located in the vehicle body and a plurality of sets of storage cylinders arranged in the main storage tank and used for independently storing electronic detonators, the multiple storage cylinders are folded in a unified mode through an external connecting frame, the storage cylinders are rotationally arranged in the external connecting frame, and the gravity centers of the storage cylinders are located below the center. According to the electronic detonator carrying vehicle, a plurality of storage barrels are rotatably placed in an external connecting frame, and the external connecting frame is rotatably arranged in a main storage tank through a buffer moving seat, so that when the main storage tank is carried in a rolling manner, the internal external connecting frame and the storage barrels do not roll together and only deflect in a small range, and the gravity centers of the storage barrels are close to the lower part; furthermore, even if the electronic detonator is collided or braked suddenly in the movement process, the storage barrel only deflects by a small angle, and the impact can be unloaded in a self-deflection manner, so that the safety of the electronic detonator stored in the storage barrel is effectively improved.
Owner:SHANDONG TAISHAN CIVIL EXPLOSIVE EQUIP CO LTD

An impact-resistant and wear-resistant composite hopper liner unit structure and a preparation method thereof

The present invention discloses an impact-resistant and wear-resistant composite hopper liner unit structure and a preparation method thereof, comprising a mounting structure layer connected to an external structure and a wear-resistant structure layer in contact with materials, a buffer structure layer is sandwiched between the mounting structure layer and the wear-resistant structure layer; the mounting structure layer and the wear-resistant structure layer are firmly metallurgically bonded through a stabilizing structure; the stabilizing structure comprises a locking structure fixedly connected to the mounting structure layer, and a locking hole adapted to the locking structure is provided in the middle of the wear-resistant structure layer. The present invention has the characteristics of being wear-resistant, easy to install, and repairable, and can effectively avoid serious wear of the hopper, thereby solving the serious safety hazards of the hopper.
Owner:NANTONG INST OF TECH

Anti-shaking spring processing vibration grinding device

The utility model relates to spring processing and grinding technical field, concretely is a kind of anti-shaking spring processing vibration grinding device, including mounting seat, base, material hopper, vibrator, feed end and buffer device, the base fixedly connected in the upper surface of mounting seat, the material hopper is installed in the upper end of base, the vibrator is fixedly connected in the inside of material hopper, the feed end is fixedly connected in the outer surface of material hopper;The buffer device is installed in the outer surface of material hopper, the buffer device includes connecting frame and connecting ring, the connecting ring is fixedly connected in the outer surface of material hopper, the connecting frame is fixedly connected in the upper surface of mounting seat, the connecting ring is fixedly connected with slide rod at the end away from material hopper, the surface of slide rod is slidably connected with limit stop plate.The utility model buffer device, through the cooperation between limit stop plate, slide rod, connecting ring and first spring etc. component, realizes the buffering to material hopper, improves the service life of equipment.
Owner:CHANGZHOU HUIERMING HARDWARE PROD CO LTD