56results about How to "Overcome static friction" patented technology

A delivery system utilizes a handle assembly including an actuating mechanism capable of initially providing sufficient mechanical advantage to overcome static friction when initiating deployment of the medical device. The actuating mechanism includes components which help to increase the speed of deployment as the physician continues to manipulate the actuating mechanism.

An onboard system for use in measuring, computing and displaying the weight and center-of-gravity for aircraft, while keeping aircraft movement to a minimum. Pressure sensors are mounted in relation to each of the landing gear struts. A motor and rotating seal are configured into each strut and are activated by a computer / controller, while landing gear strut pressures are monitored in the determination of strut stiction. The computer / controller calculates the stiction of each landing gear strut and compensates for the pressure distortions caused by landing gear strut stiction. Additional features include reducing strut stiction, measuring landing gear strut fluid levels, monitoring landing gear strut health, weight adjustments for external ice and de-icing fluids, weight adjustments for wind, monitoring aircraft landing gear strut movement.

The invention relates to a substrate support apparatus ( 41 ) for use in a position measuring device ( 1 ) for determining the position of a substrate ( 30, 45 ) supported by the substrate support apparatus ( 41 ) by means of a laser interferometer system ( 29 ), wherein the substrate support apparatus ( 41 ) comprises a traversable stage construction ( 26, 42 ), and a stage mirror ( 9, 43 ) fixedly associated with the stage construction for reflecting a laser beam of the laser interferometer system, wherein it is suggested that the measurement-critical components, associated in a spatially fixed way, of the substrate support apparatus ( 41 ) in the combination of elements ranging from the stage mirror ( 9, 43 ) to the substrate ( 30, 45 ) are of material structures having moduli of elasticity which differ from that of the substrate ( 30, 45 ) by not more than 15%. As a result, the negative effects of air pressure fluctuations on the laser-interferometric position measurement can be greatly reduced.

A flow control valve includes a body having a body bore oriented coaxially with a longitudinal axis of the body and a seat member extending into the bore. A valve member is slidably disposed in the bore and oriented coaxially with the longitudinal axis of the body. The valve member includes a non-circular geometrically shaped head having a bore. A drive adapter includes a head receiving cavity slidingly receiving the geometrically shaped head of the valve member and preventing axial rotation of the valve member. A stepper motor is connected to the drive adapter, the stepper motor incrementally rotating a shaft engaged with the bore of the valve member. First and second equal diameter pistons of the valve member provide pressure balanced valve member operating positions.

The invention relates to a powdery and granular material tank car telescopic charging pipe with a positioning guiding function. The charging pipe comprises a charging pipe body; the charging pipe body comprises an outer casing pipe, a middle casing pipe and a conical discharging pipe; the wide end of the conical discharging pipe is connected with the lower end of the middle casing pipe through a deformable lower soft connecting pipe in a sealed manner, and the conical discharging pipe is communicated with the outer casing pipe through a lower soft connecting pipe; a telescopic driving mechanism for driving the middle casing pipe to stretch in and draw out in the outer casing pipe is arranged outside the outer casing pipe, and when the telescopic driving mechanism drives the middle casing pipe to stretch in and draw out in the middle casing pipe, the conical discharging pipe can synchronously move along with the middle casing pipe so as to enable the conical discharging pipe to be away from or close to the outer casing pipe; and when the telescopic driving mechanism drives the middle casing pipe to stretch out of the interior of the outer casing pipe, the narrow end of the conical discharging pipe can stretch into a feeding opening of a tank car. The powdery and granular material tank car telescopic charging pipe is compact in structure, the tank car can be effectively guided to be in place, it can be ensured that the tank car can be rapidly in place, personal safety hidden troubles are removed, the car loading time is shortened, and safety and sanitation of food can be ensured.

A method and apparatus (20) for accumulating articles (28) can include a dispensing of the articles with a rotating, metering drum (40) for movement to a first conveyor (50). The metering drum (40) has an entry end (86) and an exit end (88), and in a particular aspect, the metering drum (40) can be configured such that a rotation of the metering drum overcomes a static friction which would inhibit a movement of the articles (28) downstream through the metering drum. In another aspect the metering drum (40) can include at least one lug member (90) which is positioned and attached inside the metering drum at the exit end (88) of the metering drum. In further aspects, a ramp member (43) can be configured to extend an operative distance into the volume of the metering drum, and can be spaced away from an inside wall surface of the metering drum by a selected offset distance.

The invention relates to the technical field of civil engineering earthquake resistance and disaster prevention, in particular to a self-reset friction damper. An energy dissipation assembly and a reset assembly of the damper are mounted in an outer sleeve in a sleeved mode, static friction force exists between the energy dissipation assembly and the outer sleeve, and the energy dissipation assembly and the reset assembly are coaxially connected through a connecting shaft. When the energy dissipation assembly is subjected to the effect of outer force to slide in the axial direction of the connecting shaft, the static friction force can be overcome, and the reset assembly can be pushed to store energy; the reset assembly has preset elastic potential energy and is used for utilizing the elastic potential energy to drive the energy dissipation assembly to reversely move and reset after the energy dissipation assembly slides, the energy dissipation assembly with the stored energy is resetthrough the reset assembly, thus large residual deformation generated by an existing friction damper after an earthquake is effectively reduced and even eliminated, the self-reset friction damper hashigh energy dissipation and the self-reset characteristic, and both the friction force and restoring force can be adjusted; and meanwhile, full-prefabricated machining and fabricating can be implemented, demounting can be conducted in the using period, overhauling and maintenance are easy, and the self-reset friction damper can be replaced after the earthquake.

The element (10) has an inner annular surface (56) for torque-proof connection with a drive shaft (2) of a hydraulic machine (1), and an outer annular surface designed as a radial sliding surface. The sliding surface is formed in a bearing retainer in a sliding manner. The annular surfaces are connected with one another over an elastically deformable supporting rod. The supporting rod is elastically deformable such that bending of the drive shaft and / or misalignment in the supporting rod is compensated. The supporting rod has an annular recess formed between the annular surfaces. An independent claim is also included for a hydraulic machine i.e. axial piston pump in swash plate construction type.

The invention discloses an efficient medicine grinding device which comprises a machine body and a base, wherein a casing shell is in rotatable connection to the inner wall of the machine body; a rotation cylinder is in sealed threaded connection to a rotation center of the top of the cashing shell; a slide cavity is formed in the inner wall of the rotation cylinder; a slide plate is in sealed slide connection inside the slide cavity; a push rod is fixedly connected to the top of the slide plate; a press plate is fixedly connected to the top of the push rod; a grinding ball is welded on the bottom of the rotation cylinder; the outer wall of the grinding ball is sleeved by a rubber cover; and the rubber cover is filled with a magneto-rheological fluid. A feeding hole is formed in the top ofthe cashing shell, and the feeding hole is in sealed rotatable connection to a feeding plate. The efficient medicine grinding device disclosed by the invention has the beneficial effects that based on a characteristics of the magneto-rheological fluid that the fluid turns to a solid under magnetic field effects, a rubber layer can clean powder carried by a surface during extension and contractionthrough contact and separation of the slide plate and a conductor plate; and through breakdown of a metal plate capacity for recovery of metal constitution, auxiliary pushing of grinding of the grinding ball can be realized, and use is convenient.

A motor-driven mobile device has an inertial drive which overcomes static friction between the device and a surface by inertial mass movements and resulting inertial forces in specific phases and recycling the inertial mass movements in other phases, without the static friction being overcome. A unit for regenerating the mobile device and a method for moving the device over a surface, are also provided.

The invention discloses an anti-overflow and anti-scalding electric rice cooker. The anti-overflow and anti-scalding electric rice cooker comprises a shell, an inner container and a cooker cover, wherein a heating plate fixed on the bottom wall of the shell is abutted against the bottom of the inner container, the shell is rotatably connected with the cooker cover through a pin shaft, a sliding cavity is formed in the cooker cover, a push plate is hermetically and slidably connected in the sliding cavity, a screw is in threaded connection with the center of the push plate, two optical shaft sections of the screw are respectively and rotatably connected with two bottoms of the sliding cavity through bearings, a rotating plate is fixedly connected to the bottom of the screw, and a pluralityof small holes are formed in the rotating plate. The anti-overflow and anti-scalding electric rice cooker has the beneficials advantages that according to the anti-overflow and anti-scalding electricrice cooker, through the staggered arrangement of the small holes and exhaust holes, relatively cold gas is compressed under the action of the hot pressure of the inner container and is finally discharged in the form of small airflow columns, so that water bubbles accumulated in the inner container are broken in cold and hot contact and airflow impact, and meanwhile, the heat carried by the discharged gas is reduced, and scalding is avoided.

A device for removing a file fragment lodged within a root canal of a tooth may include: a flexible shaft configured for insertion into the root canal; a plurality of prongs extending from the distal end of the flexible shaft; a concentric shaft slidable upon the flexible shaft and configured to contact and move the prongs into contact with the file fragment; and a device to create and deliver vibrations at an intensity configured to cause local melting of the plurality of prongs in contact with the fragment, for welding of each of the prongs to the fragment. Counter-rotation of the shaft and fragment may cause it to be dislodged from the canal. Prior to using the device, the root canal may generally be enlarged using a drill, and an umbrella drill is used to form an opening around the coronal end of the fragment to expose a portion thereof.

A gentle start-up device includes: a rotational type hollow pipe body, including an inlet and an outlet, and having an inner wall provided with a plurality of bar-shaped fins; a transmission unit, physically connected to the rotational type hollow pipe body; and a driving unit, physically connected to the transmission unit for driving the transmission unit to rotate the rotational type hollow pipe body in a rotational direction and to achieve a predetermined rotational speed according to a water supply flow value of a water turbine of a hydraulic generator set, whereby water flow which passes through the rotational type hollow pipe body generates rotational flow.

A lever-releasable first electrical connector body includes a housing that includes a set of electrical connectors and a lever rotatably mounted in the housing for rotation between retracted and extended positions. When the first connector body is engaged with a second electrical connector body to form electrical connections with the set of electrical connectors, the lever is normally in the retracted position. Rotation of the lever to the extended position causes an end of the lever to engage and urge the second electrical connector away from the first electrical connector.

The embodiment of the invention provides a demounting device. The demounting device comprises a guiding part, an impacting part and a limiting part; the limiting part is fixed together with the limiting end of the guiding part; the impacting part is arranged on the guiding part in a sleeving manner, and can do reciprocating motions along the guiding part; under a using state, the locking end of the guiding part is fixed together with equipment to be demounted, the impacting part is moved to the direction of the locking end of the guiding part, the impacting part is used for increasing the impact force of the limiting part of the impacting part, so as to carry out demounting operation on the equipment to be demounted. According to the technical scheme provided by the invention, through impacting force caused by that the impacting part quickly slides and strikes the limiting part, static friction force caused by the connection of a blind matching component equipment and a machine frame,or relatively large friction force caused by inclination when a relatively heavier component equipment slides on a long distance pathway, are overcome. Therefore, the demounting of the blind matchingcomponent equipment is facilitated, the maintenance and repair time is shortened, and the labor cost is lowered.

The invention relates to the field of speed reducers, and discloses a worm gear and worm transmission structure, a worm gear and worm speed reducer and a speed reduction motor. The worm gear and wormtransmission structure comprises a worm and a worm gear assembly. The worm gear assembly comprises a worm gear shaft, a worm gear, a gear, and a meshing delaying mechanism for delaying meshing of theworm gear and the gear, and the worm gear and the gear are arranged on the worm gear shaft in a sleeving mode. According to the technical scheme, based on the arrangement of the meshing delaying mechanism, after the worm drives the worm gear, the worm gear cannot immediately drive the gear to rotate, a certain time difference exists between the motion of the worm gear and the motion of the gear, the angular momentum of the worm gear can be improved by utilizing the time difference, and the angular momentum can be converted into impulse acting on the gear, so that the aim of overcoming the maximum static friction force in a system is achieved, and the problem of difficulty in starting the speed reduction motor is solved.

A beam control apparatus consists of an electromagnetic field control component, which has a spherical cavity encircled by a transparent spherical shell, and a beam directing component which is spherical in shape and located in the spherical cavity. The two components can rotate relative to each other. A clearance between the two components could be filled with lubricant. The beam directing component has a magnetic moment or an electric dipole moment. A controller controls a magnetic field or an electric field in the spherical cavity of the electromagnetic field control component to exert a torque on the beam directing component to control a direction of the beam directing component, thereby controlling a direction of an emergent beam. The present invention is a new terminal technology for free space optical communications, laser scanning, unmanned driving, laser beam driving and location identification.

The invention relates to the technical field of steel smelting, in particular to a device for cleaning materials attached to the wall of an Australian ore bin. The device comprises air cannons and a controller. Each air cannon is arranged on one surface of a lower cone body of each Australian ore bin, and an electromagnetic valve is arranged on each air cannon; the controller is connected with theelectromagnetic valves and used for controlling the opening and closing of the electromagnetic valves; when the controller controls each electromagnetic valve to be opened, a pressure air airflow isejected by the corresponding air cannon to impact the wall of the Australian ore bin, so that the pressure air cleans the materials attached to the wall of the Australian ore bin; and by adopting theexpansion impact wave suddenly released by the air cannons, static friction and adhesion force are overcome by impact and vibration, Australian ores in the ore bin are smoothly discharged, the materials attached to the bin wall are rapidly away from the bin wall, and therefore, the purpose of quickly and effectively cleaning the materials attached to the wall of the Australian ore bin is achieved.

The present invention discloses an apparatus and a method for overcoming hydrostatic level gauge static friction force and improving precision. The apparatus comprises a power source assembly, wherein the power source assembly is a liquid level, float, connection rod or liquid storage barrel drive assembly, and is used for driving between the float (3) and the inner wall of the liquid storage barrel (2) or the connection rod (5) and the meter (1) so as to overcome static friction force and generate relative motion. According to the present invention, the power source is additionally arranged on the hydrostatic level gauge, the power source drives the liquid level, the float, the connection rod or the liquid storage barrel, and the static friction force between the float and the inner wall of the liquid storage barrel is overcome to generate the relative motion, such that the float can really reflect the liquid level change in the barrel, and the measurement accuracy (the precision can achieve about 0.02 mm) of the hydrostatic level gauge can be improved; and the power source drives the liquid level, the float, the connection rod or the liquid storage barrel, such that the connection rod can move, the snapping problem possibly occurring between the connection rod and the displacement meter can be solved, the float can move, the liquid level change in the barrel can be really reflected, and the measurement accuracy of the hydrostatic level gauge can be improved.

A method for shifting a gear in a synchronizer comprising a synchronizer body arranged on a transmission shaft, a first and a second synchronizer associated to a first and a second transmission gear, wherein the synchronizer has a sliding sleeve and at least one thrust piece which is shiftably arranged on the synchronizer body and can exert an axial compressive force on the corresponding synchronizer ring. The synchronizer includes an elastic actuating element active between the sliding sleeve and the thrust piece, and the sliding sleeve has a detent recess for the neutral position and a release contour that can cooperate with the actuating element such that when the sliding sleeve is shifted for being engaged with one of the transmission gears, the thrust piece is urged away from the corresponding synchronizer ring.