32results about How to "Limit impact" patented technology

Methods of abrading surfaces by rotationally reciprocating abrasive surfaces in contact with the surfaces, abrasive articles for use in rotationally reciprocating tools, and methods of removing defects in a surface, where the methods include sanding using a rotationally reciprocating abrasive surface followed by one or more polishing operations are disclosed.

Wedging blades attached to the disk of a rotor having slots. According to the invention, each wedging spacer is made of an elastically deformable material and at least one longitudinal segment of the spacer presents a transverse profile of arcuate shape to define two lateral contact zones.

Fire protection systems and methods for ceiling-only high-piled storage protection. The systems include a plurality of fluid distribution devices disposed beneath a ceiling and above a high-piled storage commodity having a nominal storage height ranging from a nominal 20 ft. to a maximum nominal storage height of 55 ft. and means for quenching a fire in the storage commodity. The stored commodity to be protected may include exposed expanded plastics. The fluid distribution devices include a frame body having an inlet, an outlet, a sealing assembly, and an electronically operated releasing mechanism supporting the sealing assembly in the outlet.

Extrusion blow molded (EBM) articles comprising a polyester having a dicarboxylic acid component and a glycol component. The dicarboxlyic acid component comprises at least 90 mole % terephthalic acid residues. The glycol component comprises at least 88 mole % ethylene glycol residues and 7 to 12 mole % residues of a difunctional glycol such as, for example, 1,4-cyclohexanedimethanol. Such EBM articles can exhibit reduced haze, reduced sharkskin, and / or increased compatibility in PET recycling.

A system for launching and recovering marine or underwater vehicles from a carrier ship which remains under way which limits the amplitude of pitching and rolling movements. The system includes an inclinable articulated ramp including a bottom and edges, and hauling means for controlling sliding of the vehicle along the ramp during launch and for hoisting the vehicle up along the ramp. The ramp has a free end which varies between an immersed position in the water and an emerged position in a horizontal position. The system also includes buoyancy means allowing the free end of the ramp to float at or near the surface of the water when the ramp is lowered. The bottom of the articulated ramp also has an external face configured to form streamlining thus ensuring fluidity of the end of the ramp in contact with the water and limiting vertical dynamic movements caused by waves.

A cut-and-cover concrete tunnel structure (10) is provided with a lower concrete part (2) and an upper concrete or steel part (3) of the structure. The lower part (2) of the structure is constructed in unreinforced concrete, poured directly against and supported by a partly horizontal, partly inclined and approximately circular or elliptically shaped excavation surface (6′). The upper part (3) is arch shaped, constructed in reinforced (cast-in-place or precast) concrete or steel, and is of circular, elliptical or partly elliptical shape. This cut-and-cover structure allows a more efficient and less costly tunnel construction.

The present invention relates to an antenna (7) for an aircraft (1), the antenna being fitted with a coaxial cable provided with a coaxial connector (25) comprising a core (26) and shielding (27), the coaxial cable (24) being suitable for being connected to a source (40) for co-operating with the antenna (7). The antenna comprises a cable-cutter device (10) having a frame (12) carrying two sharp edges (11), said antenna (7) including an impedance-matching system (35) connecting said frame (12) to said core (26), said frame being a radiating member of the antenna.

A method of adjusting a fuel flow rate in a turbine engine propelling an aircraft, including: obtaining a first estimate of a flow rate of fuel injected into a combustion chamber of the turbine engine propelling an aircraft and as delivered by a fuel metering device of the turbine engine; obtaining a second estimate of the fuel flow rate, which second estimate is more accurate than the first estimate for at least one range of fuel flow rate values and being delivered by an estimator device having a flow meter; and adjusting the fuel flow rate threshold value with help of a difference evaluated between the first estimate and the second estimate, the threshold value being for use in an open loop for regulating the turbine engine.

The present invention discloses a safety protection method for digit user line accessing multiplexer, referring to computer network and telecommunication network technology field. Said method includes single board hard ware catching special protocol message from corresponded each XDSL port and sending to single board CPU; single board CPU detecting received special protocol message and judging in unit time whether said special protocol message flow rate exceeding predetermined threshold, if it is not then single board CPU uploading said special protocol message to host computer CPU processing, otherwise single board CPU stopping uploading said special protocol message to host computer CPU. The present invention does not need manually configuring MAC address or MAC address maximum learning number in subscriber access port, reducing maintenance quantity and important protocol message lose, and reducing CPU use rate.

The invention discloses a full-wedge structure anti-explosion container which comprises a barrel and a flange arranged at the top of the barrel; a check ring in a circular shape is formed at the lower part of the internal wall of the flange in bulged manner; a wedge clamping groove in a circular shape is formed in the middle of the internal wall of the flange in hollowed manner; a cover plate is placed horizontally on the upper surface of the check ring of the flange; a first wedge strip, a second wedge strip and a third wedge strip are arranged at the edge of the upper surface of the cover plate; the first wedge strip, the second wedge strip and the third wedge strip are sequentially connected end to end to form a zero-clearance wedge ring; the first wedge strip, the second wedge strip and the third wedge strip are each provided with a wedge clamping block; the zero-clearance wedge ring is externally matched with a plurality of pressing blocks; the pressing blocks are fixed to the internal wall of the upper part of the flange through screws; and all the pressing blocks, under the pressing force of the screws provide the wedge matching pressing force to the various wedge clamping blocks of the zero-clearance wedge ring. Under the action of the pressing force, self sealing of the zero-clearance wedge ring can be realized, and the full-wedge structure anti-explosion container especially has good effects on limiting the leakage of an explosion product and protecting explosion shock.

The invention discloses a low-voltage precharging system for a high-voltage variable frequency system, and a control method of the low-voltage precharging system. The low-voltage precharging system comprises a high-voltage power supply, a high-voltage switch, a transformer, a low-voltage power supply and a low-voltage precharging circuit, wherein an input end of the high-voltage switch receives the high-voltage power supply; a primary side of the transformer is connected with an output end of the high-voltage switch; a secondary side of the transformer is connected with the high-voltage variable frequency system; an input end of the low-voltage precharging circuit receives the low-voltage power supply; an output end of the low-voltage precharging circuit is connected with a low-voltage winding of the transformer; and the low-voltage precharging circuit comprises a precharging switch, a precharging resistor connected in series with the precharging switch, a maintaining resistor connected in series with the precharging resistor, and a bypass switch connected in parallel with the maintaining resistor. Compared with a high-voltage precharging circuit, the low-voltage precharging system can greatly lower the product cost; the space volume of the system can be reduced effectively; impact of short-circuit current on a power supply system can be limited; and the power consumption of the precharging resistor can be reduced effectively.

A method for determining a time course of an accident which occurs inside an installation in which takes place at least one risk-prone process, characterized in that it comprises: (a) a step (MS) for determining a source term (S(t)) which identifies a source at the origin of the accident and which comprises rate data of a harmful substance emitted by the identified source, (b) a step (Mcd) for calculating in real time, amounts of the harmful substance present in different points of the installation, from said rate and from geometrical data (GI1) of the installation, and (c) a diagnostic step (MD) at the end of which a datum (dInt) of feasibility or non-feasibility of intervention in the installation is delivered, after analysis of the time-dependent variations of the amounts calculated in the calculation step.

The invention relates to an industrial robot trajectory planning method, and especially relates to an impact constrained robot obstacle avoidance and time optimal trajectory planning method. The trajectory planning system can autonomously plan a smooth trajectory meeting speed, acceleration and jerk limitation in an off-line mode under the condition that limited parameters are input. The system mainly comprises a path planning module, a spline interpolation module, an obstacle avoidance processing module and a time optimization trajectory planning module. The path planning module introduces target bias and target preference thoughts in an obstacle repulsion field, the spline interpolation module performs interpolation smoothing on path key nodes by adopting a quintic spline interpolation function, and the obstacle avoidance processing module performs collision avoidance processing on an industrial robot and an obstacle by utilizing a geometric fine detection method. A robot connecting rod and a welding gun are enveloped by using a capsule body, an obstacle is enveloped by using a sphere, and a time optimization track module combines a grade system and a greedy strategy with a traditional whale optimization algorithm, so that the global search capability of the algorithm is improved.

The invention belongs to the technical field of vehicle shock absorption, and particularly relates to an impact acceleration sensitive valve. The impact acceleration sensitive valve is installed on abottom valve between a working cavity and a compensation cavity of the shock absorber, and adopts a spring mass system composed of a compressed spring and a slide block for sensing impact loads on a vehicle from the pavement, and thus the purpose of judging the working condition is achieved; a hole between the slide block and a valve rod is utilized for achieving communication of a high-pressure cavity of the shock absorber, unloading of the high-pressure cavity of the shock absorber can be achieved when the shock absorber meets intense impact of the pavement, so that impact transmitted to a vehicle body by the shock absorber is reduced, and the requirement of different working conditions for damping is met. According to the impact acceleration sensitive valve, a favorable condition is created for symmetric design of damping of the shock absorber. Compression damping is increased, stretching damping is lowered, the improvement of the posture of a vehicle is facilitated, a suspension isrestored in time, and the smoothness and handling stability of the vehicle are comprehensively improved. The impact acceleration sense valve is compact in structure, high in manufacturability and controllable in cost.

The invention discloses a high-voltage frequency converter with centralized charged power units. The high-voltage frequency converter comprises the power units, a phase-shifting transformer, a high voltage power supply, a low-voltage power supply and a centralized charging circuit, wherein a circuit breaker QF11 is arranged between a primary winding of the phase-shifting transformer and the high voltage power supply in a series connection mode, a secondary line winding of the phase-shifting transformer is connected with the power units, an auxiliary winding is arranged on a secondary side of the phase-shifting transformer, and the auxiliary winding is in series connection with the centralized charging circuit and the low-voltage power supply in sequence. Compared with existing high-voltage frequency converters in the market, the high-voltage frequency converter with the centralized charged power units has the advantages that the number of used charging elements is small, product costs can be greatly reduced, space size of a whole machine can be effectively reduced, maintaining is convenient, meanwhile, impact on direct current capacitors and rectification devices in the power units during supply of high voltage electricity can be limited, the service life of the high-voltage frequency converter is prolonged, and the reliability of the high-voltage frequency converter is improved.

The invention discloses a detachable penetration prevention and protection device for a heavy-haul freight car based on non-Newtonian fluid. The detachable penetration prevention and protection deviceincludes anti-collision belts and a plurality of connecting pieces. The anti-collision belts each includes a metal shell, a buffer layer, a rubber bag and non-Newtonian fluid filler; the buffer layers and the rubber bags are arranged in cavities of the metal shells, and the buffer layers are placed between the rubber bags and the metal shells; the rubber bags are closed bags with fluid inlets andfluid outlets separately formed in both ends, the fluid inlets and the fluid outlets lead to the outside of the metal shells, and the rubber bags are filled with the non-Newtonian fluid filler; and the multiple connecting pieces with reserved holes are arranged on two end parts of the anti-collision belts, and the anti-collision belts are fixedly installed on the front side surface and the rear side surface of a truck compartment through high-strength bolts arranged at the reserved holes. The detachable penetration prevention and protection device has the beneficial effects that the non-Newtonian fluid can be replaced at any time as needed, the detachable penetration prevention and protection device is simple and fast, easy to operate and free to install and disassemble, and under the premise of fully guaranteeing penetration prevention and protection functions, the detachable penetration prevention and protection device fully meets a green construction theory of resource conservationand environment friendliness to the greatest extent.

The invention discloses a hybrid vehicle motor torque compensation coordinating method based on engine dynamic characteristic recognition. A control method for engine dynamic responding performance recognition, responding torque estimation and motor synchronous compensation is provided in order to solve the problems that, for instance, variations of states of two power sources and a clutch easilycause impact during mode switching of a parallel hybrid vehicle, a real engine has many influencing factors for dynamic response, continuously varying response characteristics and obvious lag and error, differences in message periods of sub-controllers easily cause relative time delay of communications, and the sub-controllers provide lagged control. In dynamic conditions such as quick acceleration, dynamic response characteristics of an engine are recognized via its actual response data, future response is estimated, total torque response error of the engine during operating can be effectively decreased via motor synchronous compensation, and vehicle dynamic properties are improved at the premise of ensuring smoothness and comfort.

The invention discloses a current peak compensation circuit. The current peak compensation circuit comprises an error amplifier, a pulse width modulation circuit, a power tube, a synchronous tube, an energy storage inductor, a filter capacitor, a first LED lamp, a second LED lamp, a sampling resistor, a comparator, a diode, and an NPN transistor. The system can be more stable by using the current peak compensation circuit.

The invention relates to an actuator (30), in particular intended for being integrated into a valve for a motor vehicle engine, comprising: a toothed sector (34) rotatably mobile about an axis of rotation; a rod (32) centred on the axis of rotation; and a damping means (36) comprising at least one pair of abutments (38), at least one abutment (40) being rigidly connected to the toothed sector (34)and at least one abutment (42) being rigidly connected to the rod (32), and wherein at least one abutment (40, 42) of the pair of abutments (38) is designed to absorb the relative movements between the toothed sector (34) and the rod (32).

The invention discloses a high-temperature pipe protection device, and relates to the field of vibration relief and impact protection of high-temperature pipes. The high-temperature pipe protection device comprises a shell, an energy absorbing component, a high-temperature pipe limiting component, a fixing component and a pressure adjusting mechanism, wherein accommodating space is formed in the shell, and is filled with particles; the energy absorbing component is at least partially embedded in the particles, and is provided with multiple small holes for enabling the particles to pass through when the energy absorbing component and the shell are relatively vibrated; the high-temperature pipe limiting component is connected with the shell or the energy absorbing component; the fixing component is connected with one of the shell and the energy absorbing component not connected with the high-temperature pipe limiting component; and the pressure adjusting mechanism is used for adjusting the compaction degree of the particles in the accommodating space. In vibration displacement, the particles are vibrated and rubbed to consume the vibration energy; the particles flow to pass through the small holes; the moving space of the energy absorbing component is cleared to guarantee relative displacement; and during impacting, the particles are adjusted by the pressure adjusting mechanism to tightly bond on the shell and to tightly wrap hole-carried objects to form fixing structures, so that activities of the high-temperature pipes are limited, and the impact damage is reduced.

The invention belongs to the technical field of continuous casting machines, and discloses a straight arc type continuous casting machine fan-shaped section, which comprises a first vertical section and a second vertical section which are connected. The fan-shaped section also comprises a vertical section fixing structure. The vertical section fixing structure comprises a first positioning shaft,a second positioning shaft, a first fixing frame, a second fixing frame, a first connecting sleeve, a second connecting sleeve, a first positioning groove, a second positioning groove, a first positioning block and a second positioning block. The first positioning shaft and the second positioning shaft are symmetrically fixed to the two side walls of the first vertical section; the first fixing frame and the second fixing frame are symmetrically arranged on the two sides of the first vertical section; the first connecting sleeve and the second connecting sleeve are fixed to the first fixing frame and the second fixing frame respectively; and the first positioning shaft and the second positioning shaft are rotationally fixed into the first connecting sleeve and the second connecting sleeverespectively. The first positioning groove and the second positioning groove are formed in the two side walls of the first vertical section respectively; the first positioning block and the second positioning block are fixed to the second vertical section; and the first positioning block and the second positioning block are embedded in the first positioning groove and the second positioning grooverespectively. The fan-shaped section provided by the invention can inhibit middle cracks and corner cross grains of a plate blank.

The invention relates to the technical field of transformer line equipment, in particular to a transformer impedance varying method and device. The method comprises the steps: enabling an on-off module and a current limiting module to be connected in parallel, and then to be connected to a high-voltage side incoming line of a transformer in series; when a current mutual inductance module judges that the transformer line is short-circuited, disconnecting the on-off module so that the current limiting module is matched with the transformer winding to complete short-circuit current limiting; andwhen the current mutual inductance module judges that the transformer line is normal, closing the on-off module so that the current limiting module is short-circuited. According to the method and thedevice, short-circuit current can be suppressed, and loss of the transformer line is not increased.

The present invention relates to a press for the direct extrusion of metallic material, wherein the press comprises a supporting structure which defines an extrusion axis and a transverse direction orthogonal to said extrusion axis. The press further comprises an extrusion die and a die-holder drawer, in which said die is placed. Moving means are provided for moving said drawer along a transverse direction between a first position (P1), in which said die is aligned with said extrusion axis, and a second position in which, when reached, said die can be replaced. The press according to the invention further comprises a fixed supporting element which supports the drawer at least when it occupies the first position. The press further comprises at least a movable supporting element for supporting said drawer during the movement along said transverse direction; lifting means are provided for vertically lifting the movable supporting element between a first vertical position, in which the drawer is supported by the fixed supporting element, and a second vertical position, in which the drawer is lifted with respect to the fixed supporting element and supported by said at least one movable supporting element.

The present invention relates to a preterm human milk fortifier composition, more specifically to a preterm milk fortifier composition providing 2′-FL and / or LNFP-I in amounts that are missing in human milk of women who gave birth to a preterm infant. In particular the present invention relates to a fortifier composition designed for infants as a supplement to preterm human breast milk at the time the infant leaves the hospital (discharge) and after. The invention furthermore relates to the use of said preterm human milk fortifier composition.