10 results about "Soft teeth" patented technology

A multi-layer orthodontic appliance has an extra soft or rubbery first layer for contacting the patient's teeth. The first layer is supported by a harder second sheet. The second harder sheet provides a repositioning force to move the patient's teeth according to a treatment plan. The extra soft first layer grips the teeth, and in preferred embodiments, is characterized by a contact angle sufficient to create a non-adhesive hydrophobic bond with the teeth. The appliance is operable to grip and move the patient's teeth according to a treatment plan without the need of attachments, or in the alternative, significantly reduces their prominences or the number of attachments required to treat a case, and without permitting water into the interface between the appliance and the teeth.

This invention belongs to the technical field of drill pipe clamping devices. It relates to a colloidal slip for drilling rigs, comprising a flexible colloidal body and a base; the flexible colloidal body includes a flexible substrate and a flexible strip; the base has an arc-shaped groove, and the flexible substrate is disposed within the arc-shaped groove for circumferentially clamping the object; the flexible strip is convexly disposed on the inner arc side of the flexible substrate, making flexible contact with the object; the flexible strip is composed of two colloidal teeth of different materials, forming one side with hard teeth and the other side with soft teeth; the object is simultaneously pressed and contacted by the hard and soft teeth. Due to the different circumferential frictional forces generated by the hard and soft teeth on the object, the circumferential frictional forces experienced by the object during forward and reverse rotation are different. The slip of this invention is suitable for automatic drilling rigs in coal mines, employing a combination of hard and soft teeth to provide two different frictional forces for drill pipe engagement and disengagement, and the flexible material allows for non-damaging clamping of low-strength drill pipe components.

This invention discloses a rice threshing device and a combine harvester, relating to the field of agricultural machinery technology. It includes a pre-threshing section and a threshing section connected to each other. The pre-threshing section includes a pre-threshing roller with flexible soft teeth fixedly arranged on its outer circumference. The flexible soft teeth are arranged radially along the pre-threshing roller. The flexible soft teeth include straight teeth and curved teeth. The curved teeth have a curved portion at the end away from the pre-threshing roller, and the curved portion intersects with the straight teeth. A first threshing gap exists between the straight teeth and the curved teeth, and the first threshing gap is smaller than the average diameter of the threshed product. This invention improves the threshing effect by setting a pre-threshing section with flexible soft teeth in front of the threshing section to remove easily detached grains. By setting the flexible soft teeth in both straight and curved forms, the intersecting straight and curved teeth can better generate a kneading action during the rotation of the threshing section, removing as many grains as possible while effectively protecting the integrity of the grains.

The invention relates to the technical field of water pump pliers, and particularly discloses a detachable water pump pliers for water pump installation, a matching part is rotatably connected to the inner side of a connecting part, adjusting parts are fixedly connected to the side faces of the connecting part and the matching part, and a detaching mechanism is installed on the side face of a first pliers body. The dismounting mechanism comprises a jaw and a limiting assembly, mounting grooves are formed in the two sides of the jaw, the side faces of the mounting grooves are slidably connected with the inner sides of the limiting grooves, mounting holes are formed in the two sides, away from the mounting grooves, of the jaw, and the limiting assembly is arranged on the first clamp body. According to the detachable water pump clamp for installing the water pump, the limiting assembly is arranged, through a standardized installing groove, a limiting groove and a limiting rod structure, the detachable water pump clamp can be compatible with jaws of various specifications and functions, such as a metal tooth jaw, a soft tooth jaw and a thin jaw, the detachable water pump clamp can be matched with water pump parts of different sizes and materials only by replacing the corresponding jaws, the whole tool does not need to be replaced, and the work efficiency is improved. The use cost is reduced.

The utility model relates to the technical field of plastic bottles, and discloses a fixing structure for a bottle cap and a bottle neck, which comprises the bottle neck and the bottle cap, the bottle cap is in threaded connection with the bottle neck, and an aluminum foil sealing sheet is adhered to the upper port of the bottle neck. Due to the fact that the protruding block is arranged on one side of the bottle neck and the protruding plastic soft tooth is correspondingly arranged on the same horizontal position of the inner wall of the bottle cap, when the bottle cap is screwed down, the bottle cap needs to be aligned and buckled on the bottle opening to rotate downwards, and the protruding plastic soft tooth on the inner wall of the bottle cap also descends along with rotation of the bottle cap at the moment. When the bottle cap is completely covered on the bottle neck and is tightened at last, the plastic soft teeth of the bottle cap just slide through the convex blocks and then are staggered and sound, and the bottle cap is tightened on the bottle neck without being tightened again, so that the problem of liquid leakage caused by the fact that the bottle cap is not tightened can be avoided, and meanwhile, the problem of damage to threads of the bottle cap caused by excessive tightening can also be avoided; and the problem of inconvenience in uncovering caused by excessive tightening can be avoided.

The utility model particularly relates to an oral cavity auxiliary device for gastroscopy. The oral cavity auxiliary device comprises a biting device, a silica gel soft tooth socket and an elastic bandage, the front end of the bite device is provided with a bite device front baffle, the upper end and the lower end of the bite device front baffle are symmetrically provided with silica gel soft tooth socket fixing grooves, the left end and the right end of the bite device front baffle are symmetrically provided with bandage fixing buckles, and the center of the bite device front baffle is provided with a lens inlet; a hollow biting part is arranged at the rear end of the biting device, a gear blocking ring is arranged on the outer side of the biting part, and a space for biting is formed between the gear blocking ring and a front baffle of the biting device; a tongue pressing body is arranged at the tail end, far away from the biting device front baffle, of the biting part; a silica gel soft tooth socket ring is arranged on the lip side of the silica gel soft tooth socket and can be matched with the silica gel soft tooth socket fixing groove; a plurality of bandage fixing holes are formed in the elastic bandage and can be matched with the bandage fixing buckles.

A bidirectional disturbance seed cleaning device suitable for peanut seed sowing device, characterized by: the seed filling shell, the seed combing soft brush, the seed cleaning tooth plate, the seed sowing disc, the sleeve coupling, the sealing cover, the sealing gasket, the negative pressure cavity shell, the bearing, the motor, the seed dropping assembly, the seed filling shell is connected with the negative pressure cavity shell, the brush handle of the seed combing soft brush is fixed on the seed filling shell, the seed cleaning tooth plate is connected in the seed filling shell through the fixed hole, the seed sowing disc is located between the seed filling shell and the negative pressure cavity shell, is connected with the motor shaft through the sleeve coupling, the motor is fixed on the outside of the negative pressure cavity shell, the motor shaft passes through the bearing, the bearing is installed on the negative pressure cavity shell, the sealing cover is fixed on the inside of the negative pressure cavity shell, the seed dropping assembly is installed below the seed sowing disc side.The structure of the present application is simple and reliable, and the soft teeth made of elastic material are used to comb and remove the excess seeds on the seed sowing disc step by step, effectively reducing the reseeding rate and improving the single grain precision seeding operation quality.

A force sensing toothbrush takes the form of a conventional hand-held toothbrush with an integrated capability to determine and alert a user that a proper, effective brushing force is employed. Irrespective of any abrasive medium such as toothpaste and rinse, an often overlooked aspect of brushing is simply the agitation of the brush against the tooth surface and to gingival and sulcus depth for removal of plaque and other soft tooth borne substances. The force sensing toothbrush requires a force of the brush material (typically an array of bristles) against the tooth and gum for determining a range that is effective in dislodging surface and gum lodged contaminants.

This invention belongs to the technical field of drill pipe clamping devices. It relates to a method for achieving dual frictional force through a ring-shaped array of colloidal slips. The slips encircle and clamp the object, each slip comprising a flexible colloidal body and a base. The flexible colloidal body includes a flexible substrate and flexible strips. An arc-shaped groove is provided within the base, and the flexible substrate is disposed within the arc-shaped groove. The flexible strips are convex and located on the inner arc side of the flexible substrate, making flexible contact with the object being clamped. Each flexible strip consists of two colloidal teeth made of different materials, forming one side with hard teeth and the other side with soft teeth. The magnitude of the frictional force between the slips and the object is changed by adjusting the number of flexible strips and / or adjusting the relative position between the hard and soft teeth within the flexible strips. This invention utilizes the different properties of hard and soft teeth to generate two different frictional forces in the colloidal slips during forward and reverse rotation of the active drill pipe, ensuring smooth engagement and disengagement.