63results about How to "Reduce shaft diameter" patented technology

A dual braided catheter shaft includes a flat wire forming the inner braid, thereby potentially allowing for reduced radial thickness of the shaft. In one embodiment, the shaft (100) includes an inner polymer jacket (104), an inner braid (106) formed on the inner jacket (104), an intermediate jacket (108) formed over the inner braid (106), an outer braid (110) formed on the intermediate jacket (108) and an outer jacket (112) formed on the outer braid (110). A preferred construction process involves extruding polymer material directly onto each of the inner and outer braids (106 and 110) so that little or no air gaps remain between the polymer material and the braids (106 and 110). The braiding parameters of the inner and outer braids (106 and 110) can be varied along the length of the catheter to provide varying mechanical properties.

An object of the invention is to provide an injection molding process for preparing thermoplastic resin molded articles and an injection molding apparatus for use in practicing this process, the process and the apparatus being adapted to supply a blowing agent, especially a nonreactive gas such as carbon dioxide or nitrogen gas, to a thermoplastic resin continuously at a relatively low pressure with good stability to incorporate the agent or gas into the resin. As shown in FIG. 3, a resin in a cylinder (2) of an injection molding machine (1) as melted by rotating a screw (3) is mixed and dissolves carbon dioxide which is supplied to the molten resin from a gas supply opening (5) formed in the screw (3). An amount of the gas-incorporating molten resin is measured out and injected into a mold cavity to obtain an expansion-molded article. To incorporate carbon dioxide into the molten resin, the gas is supplied from a gas inlet (11) formed in a rear end portion of the screw to a portion (4a) not fed with the resin and positioned between front and rear screw flights and closer to the front flight, through a gas supply channel 6 extending through the screw and via the supply opening (5).

A shaft 17 defines a front end portion 17a having a larger diameter and an opposite tail end portion 17b having a smaller diameter, the shaft 17 being rotatably supported by the housing 13 through a radial bearing 19 and a pair of angular ball bearings 21 at the front side large diameter portion 17a and the small diameter portion 17b, respectively.

The invention discloses a full-automatic vertical PE (Poly Ethylene) film packaging machine, which comprises a main machine frame, a lifting device, a downward pressing device, a travelling device, a revolving device, a driving device, a film clamping device, a film frame device, a roller conveyor, a jacking device, an automatic control system, a pneumatic system and a hydraulic system. A driving shaft of the lifting device is supported by four pivots and driven by a built-in motor; due to the film frame device, a film can be pre-stretched to 250%, so that material consumption can be reduced; by means of the suspension installing manner of the film clamping device, film tails cannot be generated while packaging; power and communication signals are obtained in a closed 8-pole sliding contact line by adopting double electric brushes, so that the signals cannot be lost in the operation process; in addition, in the event of lifting a material to package, the upper head face and the lower head face of the material are wrapped to a certain extent with the help of the tension of the film.

A position indicator for use with a digitizer is provided. The position indicator generates a response to an alternating field received from the digitizer. The position indicator includes a core formed of a composition including a soft magnetic metal powder mixed with a resin binder, and at least one coil provided around the core configured to generate the response to the alternating field based on the alternating field received from the digitizer.

The invention relates to a surgical instrument system encompassing a morcellator with a hollow shaft on whose distal end a cutting blade is configured, as well as a gripping instrument with a shaft on whose distal end a tool consisting of at least two jaw members and on whose proximal end a handle consisting of at least two gripping members is configured to activate the tool, in such a way that the gripping instrument can be inserted into the hollow shaft of the morcellator so that it can slide in the longitudinal direction of the morcellator shaft. To ensure versatile application along with simple structure, it is proposed with the invention that the morcellator with the insertable gripping instrument can be inserted into a hollow shaft of an additional medical instrument, in particular a resectoscope, and that an additional irrigation and/or suction canal is configured between the shaft of the morcellator and the inside of the hollow shaft of the additional medical instrument.

The present invention is directed towards surgical devices and a method used in minimally invasive surgery whereby a device is incorporated into or onto an instrument to strengthen its shaft and improve its functionality in minimally invasive surgery. The primary goal of the invention is to increase the strength and rigidity of an instrument by using a specially designed sleeve that strengthens the instrument, thereby reducing its ability to bend and increasing its load carrying capacity. The invention will provide a system that gives extra strength and rigidity to small instrument shafts, so that surgeons can still safely and reliably perform their procedures, but can also use incisions that are as small as possible.

The invention is a high-productivity energy-saving coal water fuel preparing method, relating to the ore wet-milling field, including the steps of finely crushing, premixing, pulp-milling and pulp-filtering, where the finely crushing step further reduces the particle size of raw material coal, the premixing step mixes raw material coal, coal water fuel additive and water together into a uniform strongly self-flowing pulp, the pulp-milling step has strong milling effect because of the increased filling rate of a miller, and the pulp-filtering step adopts centrifugal pulp filtering, so as to make the coal water fuel high-productivity and energy-saving.

A half thrust bearing having a semicircular ring shape for receiving an axial force of a crankshaft of an internal combustion engine is provided. The half thrust bearing includes thrust reliefs formed adjacently to end surfaces on both sides in a circumferential direction on a slide surface side which receives the axial force so that wall thicknesses become thinner toward the end surfaces. The thrust relief on a rear side in a rotational direction of the crankshaft or both thrust reliefs are formed so that a length of the thrust relief in an inner end portion in a radial direction of the half thrust bearing is longer than a length of the thrust relief in an outer end portion in the radial direction of the half thrust bearing.

The invention provides an engine VVT phaser oil supply passage structure. An oil trough ring is arranged on the internal wall of a shaft hole of a camshaft of a cylinder cover and a corresponding internal wall of a camshaft cover; the oil trough is communicated with an oil hole of an oil inlet passage or an oil return passage to which the camshaft leads an internal oil chamber and an external oil chamber of the VVT phaser; the oil trough of the cylinder cover is provided with an oil hole communicated with an engine oil control valve; meanwhile, the external wall of the shaft neck of the camshaft is also provided with an oil trough ring; the oil trough is communicated with the oil hole of the oil inlet passage or the oil return passage to which the camshaft leads the internal oil chamber and the external oil chamber of the VVT phaser, and is also communicated with the oil hole leading to the engine oil control valve and arranged at a corresponding position of the cylinder cover. As only one oil trough is arranged on the cylinder cover, the structure reserves sufficient space for the design and installation of the shaft cover of the camshaft; the other oil trough is arranged on the shaft diameter of the camshaft, which is beneficial for reducing the diameter of the shaft, improving the strength of the position of the camshaft and reducing the processing difficulty.

An automatic transmission for vehicles is equipped with a housing in which a number of clutches and brakes, as well as an input shaft and an output shaft and at least one torque-controlling shaft (1), are positioned. The torque-controlling shaft (1) is equipped with neither a lengthwise bore for the central supply of fluid to the clutches or brakes, nor cross bores and grooves.

Disclosed is a vane rotary-type rotary compressor wherein the opposite eccentric shaft-side outer peripheral surface of an eccentric portion (41) of a shaft (4) is deviated further inward than the outer peripheral surface of a main shaft portion (42) to be fitted in a main bearing (7) and the outer peripheral surface of a subsidiary shaft portion (43) to be fitted in a subsidiary bearing (8), and clearance means necessary when a piston (9) is assembled with the shaft (4) are provided on the inner peripheral surface of the piston (9) and the eccentric portion (41) of the shaft (4), so that the shaft diameter of the eccentric portion (41) is reduced. Thus, the viscous force of oil applied to the eccentric portion (41) of the shaft (4) and the inner peripheral surface of the piston (9) can be reduced, and the rotational moment around the center of the eccentric portion (41) of the shaft (4), which is applied to the piston (9) in the rotational direction of the shaft (4), can be reduced. Therefore, the sliding loss generated due to the reciprocation of a vane (11) within a vane groove (10) can be reduced.

The invention discloses a propeller with a trailing edge for air jetting. The propeller consists of a plurality of air jetting devices, a rotating shaft, a motor and two symmetrical blades, wherein the motor is located at one end of the rotating shaft; the rotating shaft is connected with an output shaft of the motor through a coupling, and the other end of the rotating shaft is fixedly connected with the propeller; the air jetting devices are embedded in the blades at equal intervals, and are located at positions of 60%-95% spanwise length of the blades; two ends of air pumps are respectively and fixedly connected with one ends of front conduits and one ends back conduits, the other ends of the front conduits are communicated with air suction ports in the upper surfaces of the blades, and the other ends of the back conduits are communicated with air jetting ports in the trailing edge. The air jetting devices suck air currents from the air suction ports in the upper surfaces of the blades, the air currents which are accelerated are jetted out of the air jet ports in the trailing edge at a certain angle, and the air jetting direction of the air jet ports can be regulated within 0-90 degrees according to requirements. Counter-acting force which is formed by jetting air currents of the air jetting devices in a rotating plane pushes the propeller to rotate, a torque born by the rotating shaft of the motor is decreased, and the thrust-weight ratio of a propeller system is increased.

The invention discloses a foot platform structure of game equipment. The foot platform structure comprises a base, a rotary pedestal arranged above the base, a foot platform arranged above the rotary pedestal and a two-degree-of-freedom rack transmission assembly arranged between the rotary pedestal and the foot platform, wherein the rotary pedestal is rotationally arranged on the base through a rotary component; the foot platform is movably arranged on the rotary pedestal through a universal joint pillar; the two-degree-of-freedom rack transmission assembly comprises a first rack transmission component and a second rack transmission component which have the same structure; and each rack transmission component comprises a rack plate which is movably arranged at the bottom of the foot platform, a servo motor mechanism which is fixedly arranged at the upper part of the rotary pedestal and is in meshing and transmission matching with the corresponding rack plate, and a compaction mechanism which is matched with the corresponding rack plate in a butting-pressing manner and ensures the corresponding rack plate to tend to be in transmission matching with the corresponding servo motor mechanism. According to the foot platform structure, with adoption of a novel rack plate transmission structure, the foot platform structure is simple in structure, convenient to disassemble and assemble, not liable in abrasion, durable and reliable; and in addition, with adoption of a structure mode of supporting a gear shaft by two points, stress of the gear shaft is a torque basically, and thus the diameter of the gear shaft and stress variation on the shaft are small, stress is uniform, and the foot platform structure is safe and stable.

The invention relates to a technology of single-casing steam turbines; a single-casing, reaction and impulse steam turbine, comprises a horizontally placed cylinder and a rotor in the cylinder; the rotor is supported by bearings in the front and in the back; the cylinder is divided into two logic parts, namely, a high-pressure part and a medium-low pressure part; the high-pressure part is provided with a plurality of reaction stages, therein each comprises a static blade and a movable blade; the static blades of the reaction-type stages are arranged on a high-pressure cylinder; the movable blades are arranged on the rotor; the medium-low pressure part is provided with a plurality of impulse stages, therein each comprises a static blade and a movable blade; the static blades of the impulse stages are arranged on a retaining ring; and the movable blades are arranged on the rotor. The high-pressure part and the medium-low pressure part are in a contraflow configuration. The inventive steam turbine overcomes the problem of insufficient rigidity of rotors with a traditional impulse design and difficult self balancing of impulse force of rotors with the traditional reaction design of single-casing three-stage reheating combined cycle steam turbine of 100MW.

The invention discloses a rotary servo oil motor. An oil valve for receiving power oil is connected with a digital electro-hydraulic governor which generates control signals; the oil valve inputs the power oil to corresponding cavities connected in an oil cylinder according to the control signals so as to drive a cam and a rotary valve which are connected with a rotating shaft in the oil cylinder to rotate; the rotary valve drives an adjusting air valve which controls the rotating speed of a steam turbine; and the cam on the rotating shaft is further connected with a restorer which adjusts a slide valve to return to a balance position according to the rotational angle value of the rotating shaft. The rotary servo oil motor performs rotary motion to drive a butterfly adjusting valve to rotate directly without generating additional driving friction force. A servo oil motor shaft can be in rigid connection with a butterfly valve shaft without underdrive. The rotary servo oil motor can reduce the rotating shaft diameter of a rotary butterfly valve so that the drive of a driving mechanism is quick, and the load control of the steam turbine is stable.

The present invention provides a half thrust bearing in a semicircular ring shape for receiving an axial force of the crankshaft of the internal combustion engine, that include a back metal layer, a bearing alloy layer and a resin slide layer, or a bearing alloy layer and a resin slide layer. The resin slide layer constitutes a slide surface receiving the axial force, and the half thrust bearing includes thrust reliefs formed on a side receiving the axial force and adjacent to both circumferential end portions thereof so that a wall thickness of the half thrust bearing becomes thinner toward the circumferential end portions. At least the thrust relief on a rear side in a rotational direction of the crankshaft has a thrust relief length which becomes larger toward an outer end portion from an inner end portion in a radial direction of the half thrust bearing.

The invention relates to a controller-integration-based wheel hub motor of an electric car. The motor comprises a main motor body, a controller, and a main shaft; and the controller is installed on the main shaft. A labyrinth ring II is arranged at a motor side cover of the outer side of the main motor body; a labyrinth ring I is arranged at the position where a controller housing I and the motor side cover are connected; and because of the labyrinth ring II arranged at the motor side cover, the two labyrinth rings form a labyrinth structure. A U-shaped binding post is arranged at an internal circuit board of the controller; and a waterproof binding post electrified with heavy currents is arranged at the controller housing, wherein the waterproof binding post is used for connecting a battery input wire. The controller-integration-based wheel hub motor has the following beneficial effects: the distance between the motor and the controller is small, the motor efficiency is high, the outgoing line is short, and the cost is saved; with the combined shaft sleeve, the shaft diameter can be reduced; because slots passing through holes are formed in the shaft and the shaft sleeve, the outgoing line of the motor is led out directly by a winding copper wire, thereby reducing the wiring process and wiring terminals and saving the outgoing line; the heat radiation condition of the controller is improved and the motor reliability is enhanced; and the electricity leakage risk is reduced.