404 results about "Depth limit" patented technology

A device for repairing a tear in a portion of tissue comprises a proximal actuator portion, a transfer needle extending distally from the proximal actuator portion and a catch needle extending distally from the proximal actuator portion. A suture needle is disposed in the transfer needle, and is extendable from the transfer needle toward the catch needle and retractable from the catch needle toward the transfer needle. An extendable catch plunger is disposed in the catch needle for capturing suture therein when it is transferred from the transfer needle. A retractable insertion sheath is provided for covering the transfer needle and the catch needle when the device is inserted into a procedural site. A depth limiting apparatus limits the depth of insertion of the needle into the procedural site.

The invention belongs to the technical field of foundation pit supporting for high-rise buildings, in particular to a foundation pit support construction method combining horizontal rotary jet-grouting soil bolting and bore concrete piles, which includes steps: firstly, constructing water-stop mixed piles and bored concrete piles according to a preset foundation pit; and secondly, performing soil excavation and soil bolting layer by layer and section by section. The foundation pit support construction method has the advantages that the foundation pit support constructed by the method is high in deformation control performance and stability and especially applicable to projections with high requirements on foundation pit deformation, and the method is applicable to mega-area foundation pit supporting in soft soil areas with failure of using internal support structures, limited slope reduction conditions and excavation depth limited within 15m, and meets the requirement that development and utilization of urban underground space continue to develop.

The invention discloses a combined cutting tool for taking inner bamboo joints and tabasheer out of an intact bamboo tube. When the combined cutting tool rotates and moves in axial direction, three tabasheer cutting blades 5 synchronously open and cling to the inner wall of the bamboo tube under action of centrifugal force, plural rear cutter teeth 14 on the external curved surface of the tabasheer cutting blades 5 take the tabasheer out, at the same time, the inner bamboo joints are taken out by a small wimble 1, a large wimble 2, an end face tooth 11 on the front end face of the tabasheer cutting blades 5 and the plural front cutter teeth 12 on the external curved surface thereof; a section of depth limiting face 13 without cutter teeth is arranged in the middle of the external curved surface of the tabasheer cutting blades 5 and is used for limiting the depth of tabasheer cutting; each tabasheer cutting blade is provided with a synchronizing pin 3; the synchronizing pin 3 can slidein the radial groove of a synchronizing grooved pulley 4, thus ensuring that the three tabasheer cutting blades 5 can synchronously open under action of centrifugal force and can synchronously retractunder action of a resetting spring 8.

The invention discloses a soil layering scraping sampler. The sampler comprises a rectangular sampling frame and a rectangular scraping plate capable of scraping soil slidably along the sampling frame, wherein depth limiting devices are arranged on both sides of the scraping plate. The soil layering scraping sampler can control the thickness of soil layering accurately and obtain a large number of soil samples at a time, and has the advantages of simple operation and convenient carrying.

A golf green repair tool with a depth limiting feature that has an earth engagement surface that has a forward slant to reposition the raised portion around a crater to the center region of the crater. A prong portion is adapted to be thrusted toward the center region of the crater and the repair tool is adapted to do minimal damage to the turf mat and provides a desirable method to repair craters left by impacting golf balls by properly repositioning of the displaced portions.

The invention relates to a mini type mulching film recovery machine of tobacco in seedling stage, which mainly comprises a seedling protective plate (1), a depth limiting land wheel (7), a break shovel (2), a stander (11), a large chain wheel (13), a small chain wheel (17), a gear wheel (18), a pinion (22), a film rolling roll (15), a universal joint (16), a position horizontal adjusting rod (20)of the film rolling roll and an angle vertical adjusting rod (25) of the film rolling roll. The gear wheel (18) and the pinion (22) are meshed to make the film rolling roll (15) and a driving wheel toreversely rotate to roll the film, so earth rolling is avoided; the inclined angle of the film rolling roll (15) can be adjusted by the universal joint (16), the angle vertical adjusting rod (25) ofthe film rolling roll and the position horizontal adjusting rod (20) of the film rolling roll according to the inclined angle of a tobacco ribbing surface; and the film rolling roll (15) is always well attached to the inclined plane of tobacco ribbing by the depth limiting land wheel (7) under the action of a depth limiting spring (8). The small tobacco seedling stage mulching recovery machine isused for recovering mulching films of seedling-stage tobacco planted in ridge culture, belongs to field tending machinery and is also suitable for recovering mulching films of cotton and other flat planting crops.

A depth limiting device for a boring tool having stop collar includes housing and a sleeve. The housing provides snap on attachment onto the stop collar, allowing for a free axial rotation of the said housing around the body of the stop collar. The housing and the sleeve have a threaded engagement for adjusting position relative to one another and thereby adjusting length of the working portion of boring tool. Coupled housing and sleeve are freely rotatable with respect to the body of the stop collar and cease to rotate when operator achieves desirable depth of drilling and the device is pressed against the work-piece surface. The structural interrelationship prevents marring of the surface of the work-piece.

The invention belongs to the agricultural machinery technical field and relates to a rolling and chopping combined banana straw crushing and returning machine. A feeding device, a rolling and water squeezing device, a chopping device and a depth limiting device are sequentially arranged on a machine frame from the front to the rear; a power transmission device allocates power supplied by a tractor to the rolling and water squeezing device and the chopping device; the tractor draws the rolling and chopping combined banana straw crushing and returning machine through a three-point suspension frame which is fixedly connected to the upper portion of the machine frame; and high speed rotation of a chopped knife drum is employed to drive a hammer claw type chopped knife to chop banana straws after rolling and water squeezing processing in the chopping device. The rolling and chopping combined banana straw crushing and returning machine has the advantages of employing two working procedures namely rolling and water squeezing and hob chopping to directly crush the banana straws in a banana growing field and directly discharge into the field to serve as fertilizers, preventing the environmental pollution, being compact in complete machine structure and good in crushing effect of the banana straws, promoting increase production of bananas and being applicable to crushing and returning operation of the banana straws in main producing areas of the bananas.

A golf green repair tool with a depth limiting feature that has an earth engagement surface that has a forward slant to reposition the raised portion around a crater to the center region of the crater. A prong portion is adapted to be thrusted toward the center region of the crater and the repair tool is adapted to do minimal damage to the turf mat and provides a desirable method to repair craters left by impacting golf balls by properly repositioning of the displaced portions.

A depth limiting device includes a stop collar having a an open end portion and an workpiece engaging portion extending along the open end portion thereof for contacting a workpiece; a spindle extending axially through the shell, the spindle including a first end extending from the exterior of the stop collar for attachment to a hole forming apparatus, and an second end interior to the stop collar for attachment to a hole forming bit, wherein the attached hole forming bit projects through the open end portion of the stop collar at a predetermined length corresponding to the desired depth of the hole in the workpiece; and a bearing assembly operatively associated with the stop collar and the spindle for isolating the rotation of the spindle from the stop collar whereby the stop collar ceases to rotate when contacting the workpiece without generating sufficient frictional contact to mar or otherwise damage the workpiece.

The invention discloses a no-tillage profiling precision seeder, which comprises a main rack. A fertilizer box is arranged on the main frame. A seeding rack is fixedly arranged in each seeding row below the main rack through a profiling four-link mechanism. A depth limiting wheel, a base fertilizer furrow opener, a seed furrow opener, a soil covering device, a compaction wheel, a seed box and a seed feeder are installed on each seeding rack. The internal part of the fertilizer box is divided into a front base fertilizer hopper and a rear seed fertilizer hopper. Base fertilizer feeders and seed fertilizer feeders are arranged at the bottoms of the front base fertilizer hopper and the rear seed fertilizer hopper at positions corresponding to each seeding row. Fertilizer feeding pipes below the base fertilizer feeders are communicated with the base fertilizer furrow openers. Fertilizer feeding pipes below the seed fertilizer feeders are communicated with the seed furrow openers. The no-tillage profiling precision seeder can adapt to and meet the requirements on seeding operation on sloping farmlands or uneven lands, can realize no-tillage precision seeding, and has the characteristics of consistent depth, high operation quality, strong adaptability, few fault and high use safety and reliability.

The invention discloses a rubber tapping machine and a rubber tapping method. The rubber tapping machine comprises a fixation frame, the top surface and the bottom surface of the fixation frame are respectively provided with annular planet gears in opposite arrangement, a knife rest assembly is installed between the top surface and the bottom surface of the fixation frame, the knife rest assembly is internally provided with a leading screw along a vertical direction, a rubber tapping assembly is installed on the leading screw and can be driven by the leading screw to vertically move along the leading screw, the rubber tapping assembly comprises a knife rest which is installed on the leading screw and can move vertically along the leading screw, one side of a cutter head swing arm is hinged to the knife rest through a torsion spring, the other side is hinged to a swing seat, the swing seat is provided with a cutter head angle adjustment seat, the top end of the cutter head angle adjustment seat is provided with a cutter head and a knife depth limiting member, and the knife rest is also provided with a knife collecting assembly which can overcome an elastic force of the torsion spring to draw the cutter head swing arm to the knife rest. The rubber tapping machine disclosed by the invention replaces labor with automatic machinery, realizes unmanned automatic rubber tapping for rubber trees, and solves the problems of large manual rubber tapping labor intensity and low manual rubber tapping precision to the maximum degree.

The invention discloses a dual-row reverse-vibration subsoiler, belonging to the field of agricultural machinery. The dual-row reverse-vibration subsoiler comprises a transmission system, a vibration subsoiling device, a supporting and depth-limiting device, a suspension frame and a frame, wherein the transmission system is arranged at the upper front side of the frame and used for transmitting power to the vibration subsoiling device via a power output shaft of a tractor; the vibration subsoiling device is arranged below the frame; the supporting and depth-limiting device is arranged at two sides of the rear part of the frame; and the suspension frame is arranged in the front part of the frame and connected with a suspension device of the tractor. According to the vibration mechanism disclosed by the invention, a structure with eccentric wheels arranged symmetrically and a connecting rod is adopted, and subsoiling shovels in the front row and the rear row are driven by the same transverse shaft to realize reverse vibration; and the two rows of shovels alternatively act forward and backward to loosen soil. Compared with the vibrations of all subsoilers in the same direction, the dual-row reverse-vibration subsoiler can be used for reducing peak traction resistance and oil consumption of the tractor and reducing vibration transferred to the frame and the tractor, and is suitable for subsoiling, land preparation and medium cultivation of soil.

The invention relates to a pneumatic-force-machinery combined type grape vine root part soil clearing device. The device comprises a rack part, a power transmission part, a root part soil brushing part, a pneumatic-force operating part and an obstacle avoiding part. The operating process of the device comprises the steps that the device is hanged at back of a tractor, a depth limiting wheel is adjusted according to the current situation of winter grape vine soil embedding, and the operating height of the rack is adjusted; the tractor is started to drive a hydraulic station and a fan to operateto drive the root part soil brushing part to start soil brushing, air blowing is started by the pneumatic force operating part, a telescopic oil cylinder moves after a rod touching sensor is in contact with a stone column, the stone column is avoided by the root part soil brushing part, and the root part soil brushing part extends out and continues to operate after the stone column is avoided. According to the device, a manner of soil sweeping plate brush and air blowing is adopted to thoroughly clear the soil on the vine root parts of grapes.

The invention discloses a spiral inclined cross-ridge adjustable ridging machine. The spiral inclined cross-ridge adjustable ridging machine comprises a machine frame. A hydraulic mechanism is arranged on the machine frame, and the lower portion of the machine frame is provided with a depth limiting mechanism, a soil loosening mechanism, a soil distributing mechanism and a spiral ridging mechanism from front to back in sequence. The spiral inclined cross-ridge adjustable ridging machine further comprises a ridging spacing adjusting mechanism arranged on the back of the machine frame. The ridging spacing can be adjusted according to the growing situation of crops in the intertillage ridging period and the soil situation through the ridging spacing mechanism, and the damage to the crops due to the over-wide or over-narrow ridging spacing is avoided. Ridge forms with different gradients can be formed through a ridge form adjusting mechanism according to the soil terrain situations, and the ridge form formed after ridging can be kept with a good original shape. The soil can be slantly milled and conveyed through the spiral ridging mechanism, the original mode that a ridging cutter blade pushes the loosened soil to the outer side of a packing auger, and the soil is thrown to the roots of the crops through the inertia is changed, the soil flow direction can be controlled, the mechanical damage to crops leaves can be reduced, and the soil ventilation performance is improved.

The garlic harvester is installed in the front of walking tractor and consists of frame as well as depth limiting wheel, vibrating digging spade, rod type conveying chain, speed variator, strip spreader and other units mounted on the frame successively from front to back. It can complete garlic digging, garlic separation from soil, strip spreading and other jobs. The engine of the walking tractor is shifted to below the handle. The present invention has the advantages of reasonable structure, high harvesting rate and low garlic damage rate.