45 results about "Tooth chamber" patented technology

A device for disinfecting and/or sterilization of a dental cavity comprising:

• • an electrode pair adapted to extend into said cavity to provide current along at least a portion of the cavity; and
  • a controller configured for sending controlled electrical energy to said cavity via current flowing between the electrodes when located in said cavity, thereby to provide electrical energy for said disinfection and/or sterilization.

A bottom portion of an intake port is provided with a sloped bottom surface formed of a plane such that sloped bottom surface approaches the side surfaces of external teeth and internal teeth from an upstream side to a downstream side in rotational direction of two rotors. Fluid that flows in the intake port is regulated by the sloped bottom surface and smoothly guided into individual inter-teeth chambers that are expanding. Since the sloped bottom surface on the bottom portion of the intake port is formed of a plane without spiral or twisting, design and manufacturing of a gear pump is extremely easy.

The invention relates to the field of metal materials, and discloses a device suitable for rust removal of inner walls of metal pipes with different diameters and different lengths. The device comprises a main box body, wherein a transmission large gear cavity is formed in the main box body; telescopic gear cavities which are symmetrical left and right by taking the transmission large gear cavityas a center are formed in the left side and the right side of the transmission large gear cavity in a communicating mode; a transmission gear cavity is formed in the left side of the telescopic gear cavity on the left side in a communicating mode; an end face tooth cavity is formed in the lower side of the transmission gear cavity; and a sliding bevel gear cavity, a telescopic advancing wheel anda rust removal brush are arranged on the left side of the transmission gear cavity. According to the device, the device is suitable for rust removal operation of the inner walls of the metal pipes with different diameters, the advancing wheel drives the device to advance, so that rust removal operation of the metal pipes with different lengths can be realized; the rust removal brush is matched with sand blasting for rust removal, so that rust removal of the inner walls of the metal pipes is more thorough; and meanwhile, automatic rust removal of the device replaces manual operation, so that the rust removal effect of the metal pipes is better, the efficiency is higher, and meanwhile, the problem that the rust removal operation of the pipes with the long length cannot be well carried out manually is solved.

In a gear pump, an outer inner wall surface of a suction port which is located on a downstream side in a rotor rotation direction, that is, a first inner wall surface, is located inward of a bottom land between internal teeth of an outer rotor, and the suction port has a shallow portion extended inward from the first inner wall surface on the downstream side in the rotor rotation direction, and a deep portion that is formed so as to be continuous with the shallow portion and that is deeper than the shallow portion. Communication between an inter-tooth chamber and the suction port is cut off with the inter-tooth chamber facing only the shallow portion.

Module (1) for a modular conveyor mat, comprising a body part (2) extending transversely to a conveying direction with a top (3) and a bottom (4), which bottom is provided with a tooth chamber (6) for receiving a driving tooth of a sprocket wheel. The body part, at a front (7) and rear (8), is provided with a series of hinge parts (9) and receiving spaces (10) alternately successive transversely to the conveying direction, so that successive modules (1) are hingedly couplable using hinge pins (11) extending through hinge bores (13) provided in the hinge parts. The front is part of a front body part (2A) of the module and the rear is part of a rear body part (2B) of the module. The front and rear body parts are hingedly connected with each other relative to a pivoting axis (Z), which traverses the tooth chamber (6).

The invention relates to a hydrostatic, slow-speed rotary cylinder engine comprising a power part (1) which acts as an output, said power part comprising a central, stationary stator (4), a rotary cylinder (6) which is used as a rotor and a shaft (2) which is mounted in a central manner on both sides of the roller bearings (10, 11) which are arranged directly adjacent to the power part (1). Supply and discharge of tooth chambers comprising the working fluid is controlled by means of a disk-shaped rotational valve (3) which is mounted in a continuously centered manner in relation to the shaft (2) and the stator (4). A toothed wheel drive is arranged between a shaft external toothing (14) and an internal toothing (17) of a stationary internal toothed ring (28; 92) as a synchronous drive for the rotational valve (3). The toothed wheel drive is subsequently arranged in the leakage oil region of the engine and is formed by a planetary gear (80) or, preferably, by an eccentric gear (30).

The invention discloses an environment-friendly engine, comprising an engine body and a first cavity arranged in the engine body. A circular cylinder is fixedly connected with the inner wall of the right end of the first cavity. Piston cavities distributed equally are circumferentially arranged in the circular cylinder. Pistons are connected with the piston cavities in a sliding fit mode. Piston push rods are fixedly connected with the proximal ends of the circle centers of the pistons. An internal tooth chamber located at the circle center is arranged in the circular cylinder. An output shaftextending back and forth is connected with the internal tooth chamber in a rotating fit mode. A first chain wheel located at the rear end of the circular cylinder is arranged on the output shaft. A disc is sleeved on the output shaft. A first fixing pin located at the circle center is fixedly connected with the disc. A hinge is arranged between the first fixing pin and the output shaft for connection. The environment-friendly engine is high in linkage, and an optimal oil-gas ratio is achieved by driving a valve to open and close through the output shaft, and the occupied area is reduced by the arrangement mode of the annular cylinder.

A plurality of external teeth 20 of an inner rotor 2 are formed such that the intake-side clearance CLi is greater than the discharge-side clearance CLd, where the intake-side clearance is the minimum value of clearance CLi between external teeth 20i and internal teeth 30i delineating an inter-tooth chamber 5 that is in communication with an intake port 6 and will demonstrate the largest change in volume when the inner rotor 2 rotates by a unit angle, and the discharge-side clearance CLd is the minimum value of clearance CLd between external teeth 20d and internal teeth 30d delineating an inter-tooth chamber 5 at least partially overlapping a partition wall 9 between first and second discharge ports 7, 8 when the change in volume per unit angle is largest.

The invention discloses a multifunctional chuck clamp. The multifunctional chuck clamp comprises a base, wherein a supporting plate is arranged on the upper side of the base, and a moving mechanism used for moving the supporting plate front and back is arranged inside the base; baffles are fixedly arranged at the two ends of the upper surface of the supporting plate, and a square block and a firstsquare barrel fixedly arranged on the front side of the square block are arranged between the baffles; and a tooth cavity is formed in each of the opposite side walls of the baffles, and racks whichare fixedly arranged on the left surface and the right surface of the square block and are symmetrical left and right in position are arranged in the tooth cavities. A part can be clamped only by controlling the electrifying condition of an electromagnet, compared with a conventional clamp, actual operation is more convenient, and the pressure between a squeezing plate and the part is controlled to be kept at a proper value through a sensor so that the part can be prevented from being damaged by excessive pressure of the squeezing plate.

The invention discloses a labor-saving cup device. The labor-saving cup device comprises a frame body and rotary elements which are distributed on the top end face of the frame body at equal intervals. Internal screw holes are formed in the bottom of the frame body, and studs are mounted in the internal screw holes in a matched mode. A tooth cavity which expands forwards is arranged in the potion, below each rotary element, of the frame body. A first groove body which expands left and right is formed behind each tooth cavity in a communicating mode. A second groove body is formed in the portion, in front of each first groove body, of the frame body. An isolation plate is arranged between each first groove body and the corresponding second groove body. A guide groove is formed in the inner top of the front side of each first groove body, and a first sliding frame expanding downwards is arranged in each guide groove. The labor-saving cup device is simple in structure, a plurality of rotary cylinders can be mounted, replacement of one rotary cylinder after winding is not needed, time and labor are saved, and the efficiency is improved; and in addition, an extra driving device is not needed, manufacturing cost is reduced, and meanwhile, purchase cost is reduced for enterprises.

In an oil pump, an inner rotor and an outer rotor rotate to discharge the oil through a discharge port. The discharge port has an outer extension portion located on a radially inner side with respect to a root circle of the outer rotor and on a radially outer side of a tip circle of the outer rotor and an inner extension portion located on the radially inner side with respect to the tip circle of the outer rotor and on the radially outer side with respect to a root circle of the inner rotor. An inter-tooth chamber facing a partitioning portion that partitions the suction port from the discharge port comes into communication with the outer extension portion and the inner extension portion. Then, a tip seal portion defining the inter-tooth chamber intersects an outer edge of an opening of the discharge port.

A gear pump having a suction port, first and second discharge ports, an inner rotor having external teeth, an outer rotor having internal teeth such that the number of the internal teeth is larger than that of the external teeth of the inner rotor, and inter-tooth chambers defined by the external teeth and the internal teeth. The first and second discharge ports are in communication with the inter-tooth chamber whose volume is decreased along with rotation of the inner rotor etc. An inter-tooth chamber which has been brought out of communication with the second discharge port is brought into communication with the suction port while the volume is decreasing. The volume of the inter-tooth chamber which has been brought out of communication with the second discharge port is increased after at least a part of the inter-tooth chamber has been brought into communication with the suction port.

The shrouded turbine with the margin plate step casing comprises the casing and a hub, blades are evenly installed on the hub along the circumference, the hub and the blades are both installed in the casing, a blade crown is installed on the circumference of the end of each blade, labyrinth teeth are installed on the outer wall of each blade crown, and the labyrinth teeth are installed on the periphery of the end of each blade. Gaps are formed among the blade crown, the comb teeth and the wall surface of the casing at the top of the blade crown, the comb teeth divide the blade crown accommodating cavity into an inlet cavity, a comb tooth cavity and an outlet cavity, margin plate steps are arranged on the wall surfaces of the casing at the tops of the inlet cavity and the outlet cavity, and a smooth curve is connected behind the margin plate step at the top of the outlet cavity for transition.

The invention provides a labyrinth sealing structure which comprises a lining and a rotor, the rotor is provided with at least two labyrinth teeth, so that a tooth cavity is formed between the two labyrinth teeth, at least one set of impact holes are formed in the middle position, matched with the tooth cavity, of the lining, and the impact holes are formed in the middle position, matched with the tooth cavity, of the lining. And the turbulent flow introduced from the impact hole forms an air curtain in the tooth cavity, and the air curtain can prevent leakage of gas in the sealed air guide flow path and destroy vortex systems in the tooth cavity at the same time, so that a larger vortex system is impacted into two smaller vortex systems. According to the labyrinth sealing structure provided by the invention, for an original labyrinth sealing air path, turbulent airflow is increased to form an air screen, when a labyrinth gap is greatly changed, a strong blocking effect is formed on the original sealing air path, leakage increase caused by gap increase is relieved to a certain extent, energy dissipation in a tooth cavity is increased, and the sealing effect of the labyrinth sealing structure is improved. Therefore, fluid leakage of an original gas circuit is reduced.

The invention discloses a novel sewage treatment equipment. The novel sewage treatment equipment comprises a support body; a groove is arranged in the support body; a loading groove is arranged in thetop wall of the support body, and is communicated with the groove; an opening groove is arranged on the right upper part of the groove in the support body; a slope groove is arranged in the bottom wall of the groove; the upper end of the slope groove is rotatablely provided with a blocking plate through an articulated shaft; a driving device is arranged in the support body, and is used for driving the blocking plate to rotate; a tooth chamber is arranged in the top wall of the groove; a shaft rod is rotatablely arranged in the tooth chamber; a first tooth wheel is fixedly arranged on the shaft rod; the upper end of the shaft rod is connected with a motor which is fixedly arranged on the support body; a holding shell sleeve is fixedly arranged at the center of the top wall of the groove; atorsion shell sleeve is rotatablely arranged in the holding shell sleeve; the top end of the torsion shell sleeve is pressed into the tooth chamber, and is fixedly provided with a second tooth wheelmatching the first tooth wheel; the lower end of the torsion shell sleeve is fixedly provided with a connection rod; and first stirring blades are fixedly arranged on the left side and the right sideof the lower end of the connection rod. The novel sewage treatment equipment is excellent in stirring effect, and high in stirring efficiency.