15 results about "Double teeth" patented technology

The set of inventions relates to medical devices, in particular to surgical retractors and wound retractors for displacing and securing anatomy of a surgical incision in a given position during surgery to provide access to a surgical region of a patient's body. A removable clip for a surgical retractor, made as an L-shaped curved member, includes a base provided with a device for fixation in a surgical retractor and a microsurgical instrument recess, and a pair of teeth for holding an anatomical structure. The toothing is configured as a profiled plate with a working area widening to ensure contact with the anatomical structure, the widening being formed by a raised pad located at least on the inner and / or outer end edge side of the lower end of the plane of the toothing plate. The included angle between each tooth part and the plane of the base is smaller than 90 degrees, and therefore gaps used for passing of microsurgical instruments are formed between the tooth parts. The surgical retractor comprises a frame with a rack carrying a fixed arm and a movable arm, the fixed arm and the movable arm being hingedly connected to a retainer for the detachable clip, where the retainer is configured to receive at least one of the aforementioned detachable clips. A removable clip assembly for a surgical retractor includes at least one central dual tooth removable clip; the at least one peripheral double-tooth detachable clamp is constructed to be capable of accommodating the central double-tooth clamp between the tooth parts of the central double-tooth clamp; and at least one central single-tooth detachable clamp. The use of the invention provides an increased working space and a higher degree of freedom of surgical instrument operation, enabling access to the lateral region of the operated structure during surgery without extending the skin incision.

The utility model provides a double-tooth zipper tooth arranging machine. Two fixing blocks are arranged on a shell; the zipper teeth are conveyed to the position between the two fixing blocks through the conveying assembly, the conveying assembly is provided with a conveying groove channel, and the zipper teeth are conveyed through the conveying groove channel; the driving assembly is arranged on the shell; the tooth clamping assembly is driven by the driving assembly, and zipper teeth are fixed to the material belt through the tooth clamping assembly. The pushing assembly controls one zipper tooth to fall into the conveying channel every time and pushes the zipper tooth to the tooth clamping assembly. The material conveying assembly is matched with the material pushing assembly, one pulling tooth falls off each time, the zipper teeth are clamped and fixed to the material belt through the tooth clamping assembly, and it is avoided that multiple zipper teeth fall off at the same time, installation of the zipper teeth on the material belt is affected, and the tooth clamping assembly and the material pushing assembly move reversely; therefore, it is guaranteed that the pushing assembly and the tooth clamping assembly alternately move, zipper teeth can be conveniently fixed to a material belt, and the efficiency of the tooth arranging machine is improved.

1. Name of the designed product: zipper slider (double teeth). 2. Use of the designed product: accessory for compression bag zipper. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view.

1. Name of the designed product: Comb (double teeth). 2. Use of the designed product: The designed product is used for combing hair. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

This invention relates to the field of tooth surface grinding technology for aviation damper shafts and limit gear shafts, specifically to a flexible internal and external gear double tooth surface grinding device and processing method. The device includes a manual reversing mechanism, a flexible double-sided force-bearing mechanism, and a motor-driven reciprocating mechanism. This invention has high processing efficiency, good precision control, and stable and reliable quality, and can meet the high-precision processing requirements of non-deformable joint fork lugs with rotating structures in mass production.

The invention provides a combined structure for synchronously unloading trapped oil of a single tooth and double teeth of a gear pump, two stepped unloading grooves are formed in the inner side surfaces of two end plates of the combined structure by taking a vertical surface as a symmetric surface, and the stepped unloading grooves are formed by recessing the inner side surfaces of the end plates along the X-axis direction; each step unloading groove is in a mirror symmetry shape with the flow direction face as the symmetry face. Each step unloading groove comprises a rectangular deep groove and a rectangular shallow groove which are communicated with each other, and the depth of the rectangular shallow groove is smaller than that of the rectangular deep groove; in the same step unloading groove, the rectangular shallow groove is located in the side, facing the vertical face, of the rectangular deep groove. According to the gear pump, the pressure amplitude and the pressure peak value of a single-tooth oil trapping area and a double-tooth oil trapping area can be fully reduced, the maximum oil trapping pressure of the single tooth is reduced to 35.2%, and the maximum oil trapping pressure of the double teeth is reduced to 45.2%, so that the oil trapping phenomenon of the gear pump is comprehensively and fully relieved, the input power of the gear pump can be reduced by about 5.4%, and the output flow is increased.

1. Name of the product in this design: Zipper (double teeth). 2. Application of this design: for use in zippers on clothing, bags, etc. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D rendering 1.

The invention provides a self-rotation type double-tooth variable cross-section scroll plate exhaust hole structure and an optimization method thereof. The self-rotation type scroll plate comprises a driving scroll plate and a driven scroll plate, the two scroll plates are arranged oppositely, the distance between the circle centers of the two scroll plates is L, a plurality of eccentric small shafts are arranged between the two scroll plates, and the driving scroll plate drives the driven scroll plate to rotate through the eccentric small shafts after rotating. And determining the maximum allowable opening area of the exhaust hole according to the autorotation process, and taking the area as the shape constraint condition of the exhaust hole. Performing parametric modeling on the exhaust hole, establishing a mathematical model between exhaust hole parameters and pressure pulsation and flow pulsation intensity coefficients, performing collaborative optimization on the exhaust hole parameters through a multi-target optimization method by taking the pressure pulsation and flow pulsation intensity coefficients as targets, and obtaining a Pareto frontier solution set; and selecting an optimization result in the Pareto frontier solution set according to an actual demand.

The invention provides a preparation method of a bidentate chelating fluorine removal agent, which comprises the following steps: step 1, dropwise adding an inorganic alkali solution into an AlCl3 solution or an FeCl3 solution, and carrying out pre-hydrolysis reaction to obtain a pre-hydrolyzed aluminum solution or iron solution; 2, mixing silanetriol with the pre-hydrolyzed aluminum solution or iron solution obtained in the step 1 to obtain a mixed stock solution, 3, dropwise adding an inorganic alkali solution into the mixed stock solution obtained in the step 2, and carrying out an alkalization reaction to obtain an alkalized solution; and 4, aging the alkalized solution obtained in the step 3 to obtain the bidentate chelating fluorine removal agent. The prepared double-tooth chelating fluorine removal agent can effectively solve the problems that in the prior art, a fluorine removal agent is poor in selective removal capacity for fluoride in fluorine-containing sewage, poor in floc settling performance, large in dosage, residual in fluorine removal agent and the like.

The utility model discloses a DP double-tooth rack phase angle automatic detection integrated device, which comprises a shell, the inner side wall of the shell is fixedly connected with a supporting plate, and the upper surface of the supporting plate is fixedly connected with a first servo rotating mechanism. Through cooperation of the angle display instrument, the first servo rotating mechanism, the second servo rotating mechanism, the positioning and leveling mechanism and the angle sensor, rapid measurement is facilitated, the measurement waiting time is shortened, the measurement efficiency is improved, the measurement result of each workpiece can be displayed through the angle display instrument and can be obtained without a series of complex conversions, and the measurement accuracy is improved. Measurement operation is quicker and simpler than three-coordinate measurement, manual measurement of operators is not needed, manual judgment risks are reduced, wrong detection and missing detection are avoided, the operators only need to place a skip car filled with workpieces at a designated position and press down an in-place switch, equipment automatically measures and records to form a database, detection data are stored in the background, and the system is convenient to use. And processing capacity data analysis in the monitoring forming process is facilitated.

The utility model discloses a durable double-tooth high-speed steel band saw blade, and relates to the technical field of double-tooth saw blades, the durable double-tooth high-speed steel band saw blade comprises a saw blade body and a saw body, the side walls of the two ends of the saw blade body are fixedly connected with anti-oxidation layers, the side wall of each anti-oxidation layer is fixedly connected with a wear-resistant layer, the side wall of the saw blade body is fixedly sleeved with a reinforcing sleeve, and the reinforcing sleeve is fixedly connected with the saw body. First mounting openings are formed in the side walls of the two ends of the saw blade body correspondingly, second mounting openings corresponding to the first mounting openings are formed in the surface of the reinforcing sleeve correspondingly, mounting rods are fixedly connected to the side walls of the two ends of the saw blade body correspondingly, and a limiting plate is fixedly connected to the rod wall of one end of each mounting rod. One end of the mounting plate is clamped with the side wall of one end of the corresponding limiting plate through the anti-skid rubber pad, so that the saw blade body and the saw body are connected more firmly, the mechanical strength of the saw blade body is improved through the reinforcing sleeve, and the service life of the saw blade body is prolonged.

The utility model discloses a fixture device for grinding teeth at the power-assisted end of a double-tooth rack, which comprises a carrier plate, a radial clamping mechanism, an axial clamping mechanism, a limiting component and a blowing component, the radial clamping mechanism, the axial clamping mechanism, the limiting component and the blowing component are all arranged on the carrier plate, and the radial clamping mechanism, the axial clamping mechanism, the limiting component and the blowing component are arranged on the carrier plate. The axial clamping mechanism is used for clamping the two ends of a to-be-machined double-tooth rack, the to-be-machined double-tooth rack comprises a steering end and a to-be-machined power assisting end which are connected with each other in the axial direction of the to-be-machined double-tooth rack, an interval groove used for containing the power assisting end is formed in the limiting component, and the radial clamping mechanism is used for clamping the steering end. An air outlet of the air blowing component faces the machining face of the power assisting end. The axial clamping mechanism and the radial clamping mechanism are used for axial clamping and radial clamping of the to-be-machined double-tooth rack correspondingly, limiting is achieved in the limiting component, and therefore the positioning effect is effectively enhanced, and the tooth machining stability of the power assisting end is improved.

Mechanical reduction gear (28) for an aircraft, comprising: - a first sun gear (32) with external teeth (32a), - a fixed ring gear (38) with internal teeth (38d), - a movable ring gear (56) with internal teeth (56a), - planet gears (34) with double teeth (34a, 54a), and - a second sun gear (70) with external teeth (70a), the reduction gear being without planet carriers. Figure for the abbreviation: Figure 6

The application belongs to the technical field of pipeline joint detection, and discloses a nondestructive testing equipment for pipeline fusion joint of HDPE double-layer pipe, which comprises a workbench, a protective shell is fixedly connected to the middle of the workbench, and a vacuum air extraction box is fixedly connected to the edge of the workbench. Through the cooperation of the double-tooth ring, the single-tooth ring, the moving plate and the protective shell and other structures, the surface flaw and leakage detection of the fusion pipeline are facilitated. The second gear is driven to rotate by the inner teeth of the double-tooth ring, and the industrial camera is driven to rotate at 360 degrees on the surface of the pipeline in cooperation with the setting of the single-tooth ring, so that non-dead-angle detection is realized. The pipeline is filled with water, and the leakage can be detected. Compared with the reagent detection of the comparative file, the device can form a negative pressure state outside the pipeline by the sealing setting of the sealing sleeve, the fixing cover and the protective shell, cooperate with the vacuum air extraction box, increase the water pressure inside the pipeline, and effectively improve the detection efficiency.