153 results about "Root surface" patented technology

A double shouldered high torque resistance threaded connection for drill stem components having enhanced resistance to torque forces, tensile loads and material stress and fatigue is disclosed. The tool joint is provided with threads having a 75 DEG included angle between the thread flanks thereof and with generally elliptical root surfaces to minimize material stress and fatigue during operation under high torque and high tensile loads. When made up, the double intrerengaging shoulders of the threaded tool joint are in firm face to face engagement permitting torque forces and tensile loads to propagate through the tool joint in a manner that minimizes bending forces and minimizes high stress concentration so that the resulting service life of the tool joint is significantly enhanced.

An electrical conduit to junction box connection system is designed connect conduit to junction boxes. The system incorporates a compression nut and a body. The body includes a box engagement region, a nut engagement region, and a conduit engagement region. The box engagement region includes a radially extending leading and follower tab, a root surface, a tab centering ledge, and a tab centering flank. The nut engagement region includes a nut engagement region thread that cooperates with the compression nut. The conduit engagement region includes a conduit compression system. During installation, the leading tab is inserted into the knockout. An edge of the knockout is positioned in contact with the root surface. The body is reoriented which positions the follower tab inside the junction box. The compression nut is manipulated to compress the junction box between the compression nut and the leading and follower tabs.

A plastic mouthpiece insert for allowing a wearer to whiten their teeth while getting a suntan, and have a generally oblong oval-rectangular opening with a curved rear end that abuts against the root surfaces of the frontal upper and lower teeth of the wearer. A raised front edge can protect the lips and separate in place about the opening to the mouthpiece. Whitening agents can be used to enhance the whitening effect so that ultraviolet light and heat source such as the sun or a sunlamp is all that it is needed. Reflective inner walls in the mouthpiece can magnify light to the teeth. The mouthpiece can include bite tables, and the side walls of the mouthpiece can be inwardly flared and funnel shaped for focusing and magnifying incoming light and heat. The mouthpiece can be colored to protect the inside of the wearer's mouth from receiving any light.

The invention discloses an airborne laser radar data-based building three-dimensional reconstruction method and aims to propose a three-dimension reconstruction method combining a building roof boundary with a roof topologic graph so as to realize automatic detection and three-dimensional reconstruction of a building. The method comprises the steps of firstly, filtering airborne LiDAR (Airborne Light Detection And Ranging) data to obtain a ground point and a non ground point; secondly, extracting building point cloud from non ground point cloud in combination with point cloud characteristic information; thirdly, segmenting a roof surface and extracting a boundary contour line; and finally, obtaining key line segments of a roof in combination with the building boundary and the roof topologic graph, and constructing closed polygons of each root surface and combination of the closed polygons so as to obtain a building roof model. The wall surface can be obtained by elevation information of DTM or the ground point, so that the building 3D (three-dimensional) model reconstruction is realized. According to the method, the application bottleneck of the airborne LiDAR data at the present stage is broken through to a certain extent, the complexity of a reconstruction process is lowered, the flexibility of 3D reconstruction is improved, and a breakthrough is provided for city 3D reconstruction.

A dental magnetic attachment having good cushioning properties against a compressing pressure which makes a denture sink appropriately on biting. The dental magnetic attachment embedded in the denture base for holding the denture in the oral cavity by a magnetic attractive force working with the magnetic assembly and a soft magnetic keeper embedded in the top of the root surface includes a magnetic assembly and a cap covering the top of the magnetic assembly. The magnetic assembly has a hollow in the center of its top. The cap with a button is placed on the magnetic assembly, inserting the button into the hollow to contact to its bottom. On biting, the button is compressed, to be deformed with a shorter thickness and at this time a sleeve formed as a body around the core slides down along the side of the magnetic assembly to reduce the thickness of the dental magnetic attachment. This sliding makes the denture sink uniformly and appropriately. The dental magnetic attachment has good cushioning properties and offers a good feeling to a patient when biting with the denture.

The invention relates to a soilless seedling culturing substrate for resisting diseases and root nematode of plants and a production method thereof. In the invention, organic wastes such as straws are taken as raw materials, inoculated with zymogen according to certain proportion, subjected to moisture content regulation, evenly mixed and stacked for primary fermentation; when the temperature of a pile reaches 60 DEG C, the pile is turned; the pile is turned and oxygen and moisture content are supplemented every seven to ten days afterwards; after the pile is turned for three times, when the temperature is lower than 35 DEG C, the pile is inoculated with a bio-antagonist for secondary fermentation, turned every three to four days and kept at a temperature of between 35 and 40 DEG C; and after 15 to 20 days, the seedling culturing substrate containing the 10 bio-antagonist is obtained. The seedling culturing substrate has chemiotaxis for interfering pathogenicbacteria and nematode, can reduce infestation chance of the pathogenicbacteria and nematode on the root surface, and has double effects of resisting phytophthora disease and root nematode disease through the secondary fermentation and microorganism activation technology.

The invention relates to a method for preparing a dendrobium officinale culture substrate. The method specifically comprises the following steps: forming the culture substrate by using rotten woods, oil tea camellia cakes, camellia oleifera abel peels and corncobs according to quantities, wherein when the rotten woods and the corncobs are crushed, a crushing machine is placed with no screen, so that the rotten woods and the corncobs are crushed into crushed substances and irregular substances including pieces and blocks. The prepared substrate has the advantages as follows: the culture medium prepared by using the rotten woods as main raw material is very suitable for nutrients needed by dendrobium officinale during growing; by using a crushing measure of the rotten woods and the corncobs, the crushed substances can be transformed into nutrients for the dendrobium officinale to absorb; the pieces and the blocks are slowly transformed to follow-up nutrients; therefore, a long-acting and balanced nutrient supply system is formed; and as the blocks are distributed inside the substrate so that the substrate has fluffy texture, the substrate is also beneficial for more root surfaces of the dendrobium officinale to grow; therefore, the growing speed of the dendrobium officinale is accelerated and the yield of the dendrobium officinale is increased.

A rotor blade comprises a blade portion, a root portion (30) connected with, and extending from, the blade portion, the root portion (30) having an annular cross section which defines first and second root surfaces, and a plurality of discrete root fittings (31) connected with respective portions of the root portion (30), and adapted for attachment to a blade mounting. Each root fitting comprises an elongate body member (31) which extends from a free end of the root portion (30) towards the blade portion, which defines first and second bonding surfaces, adhesively bonded to the first and second root surfaces respectively, and which includes means for attachment to a blade mounting.

A plastic mouthpiece insert for allowing a wearer to whiten their teeth while getting a suntan, and have a generally oblong oval-rectangular opening with a curved rear end that abuts against the root surfaces of the frontal upper and lower teeth of the wearer. A raised front edge can protect the lips and separate in place about the opening to the mouthpiece. Whitening agents can be used to enhance the whitening effect so that ultraviolet light and heat source such as the sun or a sunlamp is all that it is needed. Reflective inner walls in the mouthpiece can magnify light to the teeth. The mouthpiece can include bite tables, and the side walls of the mouthpiece can be inwardly flared and funnel shaped for focusing and magnifying incoming light and heat. The mouthpiece can be colored to protect the inside of the wearer's mouth from receiving any light. An attachable *and detachable compact hands-free light source can also be used. The light source can clip on the front of the mouthguard so that the mouthguard can allow for teeth whitening without the need for a suntanning lamp or use of the sun or other exterior light sources. The attached light source allows the user to use the mouthguard and not be restricted to staying in one place. With the attached light source the user is free to use both their hands and do all other types of activities and be able to freely move around.

In an embodiment, a conduit connector can comprise: a body comprising a box engagement region capable of engaging an opening in an enclosure and a spring configured to engage the connector and the enclosure. The box engagement region can have a root surface, a leading tab, and a follower tab wherein the root surface and leading tab can be located between a leading edge and a secondary edge. A leading tab perimeter edge and a follower tab perimeter edge define a tab perimeter diameter that is larger than an opening in the enclosure. When the leading tab is inserted into the enclosure the spring can be disposed to engage the secondary edge and the enclosure.

PCT No. PCT/RU96/00102 Sec. 371 Date Apr. 13, 1998 Sec. 102(e) Date Apr. 13, 1998 PCT Filed Apr. 29, 1996 PCT Pub. No. WO96/35613 PCT Pub. Date Nov. 14, 1996The group of inventions pertains to rocket technology, in particular guided rockets, and can be used in various types and classes of rocket with lattice control surfaces, and in the rocket control surfaces. The rocket is of a standard aerodynamic design and comprises a body (1) with a motor assembly, a guidance and control system apparatus, fixed wings (2) and movable lattice control surfaces (3) of a control system, said control surfaces being spaced evenly on the outer body along the latter's longitudinal axis. In the reinforcement frame, side members (18, 19) are designed so as to narrow towards the end region of the control surface; the root surface (22) is broader than the end surface (23), the thickness of the lattice planes (24, 25) narrowing either continuously or in steps towards the end region.

Provided is a periodontal instrument adapted for use in debridement of a root surface of a tooth having an axially elongated shaft and a shank. The shank is disposed at an end of the shaft and has a body extending distally relative to the shaft. The body includes a plurality of blades adapted for use in debridement of a root surface. Each blade is configured for scaling and/or planning of a root surface and the shaft is dimensioned and configured to facilitate manual manipulation of the shank. Also provided is a removable tip periodontal instrument adapted for use in debridement of a root surface of a tooth and a kit including a device and a plurality of tips that may be color coded for easy reference by the clinician.

The invention discloses a load reduction control method of a wind power generation unit based on a blade root load and a tower frame load. The load reduction control method comprises the following steps that 1) a load sensor is attached to the root of each blade of an impeller to directly measure a root flapping direction moment and a root swaying direction moment of each blade, and calculation isperformed to obtain a blade root surface outer moment and a blade root surface inner moment; 2) load sensors are attached to the top end and the bottom end of a tower drum respectively, a tower top moment is measured, a tower top pitching direction moment and a tower top left-and-right direction moment are calculated according to a conversion formula, a tower bottom moment is measured, and a tower bottom pitching direction moment and a tower bottom left-and-right direction moment are calculated according to the conversion formula; 3) a limit load, a safety factor and a load trigger flag are defined; and 4) whether the unit triggers the load limitation or not can be judged through a Flag bit, and corresponding control can be adopted when the load is triggered. By adopting the load reduction control method provided by the invention, load reduction control of the unit can be realized, the load of the unit under the limit working condition is lowered, and safety running of the unit is guaranteed.

A cultured periodontal ligament cell sheet is produced by a process comprising culturing cells on a cell culture support composed of a base material whose surface is coated with a temperature-responsive polymer having an upper limit or lower limit critical dissolution temperature in water of 0 to 80° C. under specified conditions, (1) regulating the temperature of a culture fluid to the upper limit critical dissolution temperature or higher or to the lower limit critical temperature or lower, (2) allowing a cultured periodontal ligament cell sheet resulting from the culturing to adhere to a carrier and (3) detaching the sheet intact together with the carrier. This cultured periodontal ligament cell sheet has a syndesmotic microstructure, exhibits extremely high bioadherence to the dental root surface and realizes high density transplantation of target cells and positive reconstruction of periodontal tissues. Moreover, through lamination of cell sheets to be transplanted and donation of a three-dimensional polarity, highly efficient reconstruction of an adhesion apparatus can be accomplished and clinical application thereof to moderate periodontitis, severe peridontitis, gingival recession and the like is highly promising.

A welding method is disclosed for butt welding a first base material 1 and a second base material 2 with each other. To also permit stable and efficient formation of a bead in the form of a fillet weld on a back side of a groove by conducting arc welding from the side of the groove without arranging a bead beforehand on the back side of the groove, the first member 1, on which a root face 1a and a single groove face 1b have been formed, is brought at its root face 1a into contact with a flat surface 2a of the second base material 2. A welding wire 6 is arranged facing on the groove formed by the contact between the first base material 1 and the second base material 2. The first base material 1 and the second material 2 are caused to fuse at an area of contact between them by an arc from the welding wire 6. A melt, which has been formed by the fusion at the area of contact and the like, is forced out to the back side of the groove to form a bead B4 in the form of a fillet weld on the back side of the groove.

In a threaded joint for steel pipes which are connected by threaded engagement of a pin member having a tapered male thread, a metal seal-forming portion, and a torque shoulder-forming portion on the end of a pipe, and a box member having a tapered female thread, a metal seal-forming portion, and a torque shoulder forming-portion corresponding to these on the end of a pipe, a buttress thread having contact at the load flanks and the thread root surface and gaps at the thread crest surface and the stabbing flanks is mixed in a single joint with a rugged thread having contact at the load flanks and stabbing flanks and having gaps at the thread root surface and thread crest surface.

The invention provides a method for covering iron plaques on root surfaces of a water planting root system of wetland plants. The method comprises the following steps of (S1) preparation of iron plaque inducting liquid: performing anaerobic acidification on anaerobic hydrolysis acidification liquid until the pH (potential of hydrogen) value of the anaerobic hydrolysis acidification liquid is equal to 5 and the oxidation reduction potential of the anaerobic hydrolysis acidification liquid is 450-500, and adding ferrous ions with 100-140mg/L in the anaerobic hydrolysis acidification liquid to form the iron plaque inducting liquid; (S2) tissue culture: placing the root system of the plants in complete culture solution and culturing the root system of the plants for 4-7 days; and (S3) replacing the complete culture solution by using the iron plaque inducting liquid, and culturing the root system of the plants for 5-10 days so as to obtain the plants of which the root surfaces of the root system are coated with the iron plaques. The iron plaques with high phosphorus adsorption capacity can be adhered to the root system of the plants cultured by using the method; and the removal rate of phosphorous in sewage can be increased.

The invention discloses a gradient material for guiding regeneration of periodontal hard and soft tissues, and a preparation method of the gradient material. The gradient material is constructed by combining an electrostatic spinning technology with a biological 3D (three dimensional) technology. A micropore structure of an electrostatic spun fibrous membrane can prevent gingival fibroblasts frommigrating to a root surface to play a mechanical barrier role and facilitate transmission of nutrition and metabolism substances; and individualized repair of alveolar bone can be achieved according to clinical requirements since a structure and a shape of a 3D printing scaffold layer are highly designable. The method is simple and stable in preparation technology, and the gradient material integrates a periodontal guided tissue regeneration membrane and an alveolar bone repair scaffold material and has a potency to achieve clinical customized treatment. The gradient material has a good effectof guiding the repair of the hard and soft tissues in vivo and can be better applied to the synchronous regeneration and repair of the alveolar bone and the periodontal tissues.