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123results about How to "Reduce impact speed" patented technology

Energetic thin-film based reactive fragmentation weapons

ActiveUS20080202373A1Improve and tailorable energy reactive behaviorReduce impact velocityAmmunition projectilesLoomsHydrideOxide
A munition is described including a reactive fragment having an energetic material having a least one layer of a reducing metal or metal hydride and at least one layer of a metal oxide dispersed in a binder material. A method is also described including forming a energetic material; including combining the energetic material having a least one layer of a reducing metal or metal hydride and at least one layer of a metal oxide with a polymeric binder material to form a mixture; and shaping the mixture to form a reactive fragment. The munition may be in the form of a warhead, and the reactive fragment may be contained within a casing of the warhead.
Owner:LOCKHEED MARTIN CORP

Designing method of fish-friendly axial flow pump based on fish survival rate prediction

The invention provides a designing method of a fish-friendly axial flow pump based on fish survival rate prediction. A relation between a pump design parameter and the fish passing survival rate is predicted by adopting a mathematical model, and thus a fish-friendly design of an axial flow pump is guided. The mathematical model is mainly composed of the blade leading edge impact probability and the impact death rate; the impact probability is a ratio of the time that fishes pass through the cross section of passage of the blade leading edge and the time needed by an impeller rotating around a blade pitch; the impact death rate is relevant to the impact velocity, the fish length and the thickness of the blade leading edge; and the impact velocity adoptsa velocity component of a vertical leading edge. The fish-friendly axial flow pump design comprises the following steps: lowering the blade leading edge impact probability by adopting two blade impellers, lowering the impact death rate by adopting the blade leading edge with linear sweepforward protraction, and ensuring good hydraulic performance by virtue of airfoil parameter design. According to the designing method, a fish survival rate prediction model is high in goodness of fit to an experiment value, and the fish-friendly axial flow pump designed by guidance can greatly lower the fish death rate.
Owner:JIANGSU UNIV

PM2.5 (Particular Matter 2.5) single-grade atmosphere sampling cutter

The invention discloses a PM2.5 (Particular Matter 2.5) single-grade atmosphere sampling cutter. The PM2.5 single-grade atmosphere sampling cutter is roughly cylindrical; the PM2.5 single-grade atmosphere sampling cutter comprises a cutting opening cover layer, an impacting nozzle layer, an impacting plate layer, a particular matter collecting layer, a gas organic pollutant collecting layer and a gas discharging layer, wherein the cutting opening cover layer, the impacting nozzle layer, the impacting plate layer, the particular matter collecting layer, the gas POPs (Persistent Organic Pollutants) collecting layer and the gas discharging layer are sequentially sealed and connected in series; the impacting nozzle layer comprises impacting nozzles and an impacting nozzle plate; the impacting nozzles are arrayed at an equal interval and are vertically inserted into the impacting nozzle plate to form an annular ring; the impacting nozzles are internally provided with reversed conical through holes; and the impacting plate layer is provided with an impacting plate and the impacting plate is an annular groove. With the adoption of the PM2.5 single-grade atmosphere sampling cutter disclosed by the invention, the characteristic that a previous air sampling device has middle and small flow is broken through; and a flow design standard of 300 L/min can meet the POPs sampling requirements so that the cutting grain diameter of the cutter is accurate and the target of accurately layering the target particular matters under the cutting of an inertia impacting force can be realized.
Owner:FOSHAN ENVIRONMENTAL PROTECTION TECH & EQUIP RES DEV PROFESSIONAL CENT +1

Fuel pump with quiet cam operated suction valve

A fuel system including a high pressure fuel pump with a quite fuel metering valve is disclosed. In one example, the quite fuel metering valve may be cam driven. The fuel system may reduce engine noise and may provide operating modes that are different from other fuel systems.
Owner:FORD GLOBAL TECH LLC

Rotary compressor and bearing component thereof

The invention discloses a rotary compressor and a bearing component thereof. The bearing component comprises a bearing, a discharge valve plate, a lift limiter and an elastic piece, wherein an exhaust port is formed in the bearing, one end of the discharge valve plate is connected with the bearing, and the other end of the discharge valve plate covers the exhaust port; the lift limiter is arranged on the one side, away from the exhaust port, of the discharge valve plate, the elastic piece is arranged between the discharge valve plate and the lift limiter, and the part, corresponding to the exhaust port, of the elastic piece and the discharge valve plate are separated from each other. According to the bearing component, the bearing component is simple in structure. When the bearing component is applied in the rotary compressor, the falling back speed of the discharge valve plate is quickened under high-frequency revolving condition, the backflow of refrigerant gas is decreased, on the premise that the low-frequency energy efficiency of the rotary compressor is not lowered, the high-frequency energy efficiency is improved, the tremor of the discharge valve plate and the impact velocity of the discharge valve piece for the lift limiter are decreased by virtue of the bearing component, so that the running noise of the rotary compressor is lowered.
Owner:GUANGDONG MEIZHI COMPRESSOR

Road isolation fence for buffering and warning

The invention discloses a road isolation fence for buffering and warning. Isolation pile, a warning lamp is mounted at the top of the isolation pile; two square grooves are symmetrically formed in theside wall of the isolation pile, an air bag is glued to the side wall of the isolation pile, an induction cavity is formed in the isolation pile, the induction cavity is communicated with the two square grooves, a storage box is fixedly arranged on the side, close to the induction cavity, of each square groove, and a circuit box is fixedly installed in the middle of the induction cavity. Rigid collision between a vehicle and the isolation pile is converted into elastic collision between the vehicle and the air bag when an accident occurs, so that the impact force between the vehicle and the air bag is reduced, the buffer to the vehicle is increased, the protection effect of the isolation pile is improved, and the isolation pile can be prevented from being seriously damaged; after collision, the warning lamps on the isolation piles automatically emit light and can be kept for a certain period of time, so that other drivers are reminded to avoid accident vehicles in time, and chain traffic accidents and rear-end collisions are reduced.
Owner:商河园通市政工程有限公司

Reciprocating compressor valve set structure with rapidly-opened-closed air discharge valve plate

The invention discloses a reciprocating compressor valve set structure with a rapidly-opened-closed air discharge valve plate. The reciprocating compressor valve set structure comprises a valve plate, a plate top is provided with a valve seat, an air discharge hole is formed in the valve seat, a lift limiting device is arranged on the valve seat, and the air discharge valve plate is arranged between the lift limiting device and the valve seat and provided with the fixed end pressed by the lift limiting device and the movable end covering the air discharge hole; a spring piece is arranged between the air discharge valve plate and the valve seat, the pre-tightening force of the spring piece is in the opening direction of the air discharge valve plate, the spring piece is also provided with the fixed end and the movable end, and the fixed end of the spring piece is fixed still relative to the valve plate; the rigidity of the air discharge valve plate is not smaller than 600 N*mm<2>. The air discharge valve plate has the higher rigidity and can be easily and rapidly closed; the elasticity of the spring piece is provided in an assisted mode when the valve plate is opened, and the valve plate can be rapidly opened in an assisted mode. The air discharge valve plate is long in service life, low in impact noise, rapid in response and capable of serving as a component part of a reciprocating compressor valve set.
Owner:WANBAO GROUP COMPRESSOR CO LTD

Method for operating a fuel injection system of an internal combustion engine

In a fuel injection system of an internal combustion engine fuel is delivered into a fuel rail by a high-pressure pump. The quantity of the delivered fuel is influenced by a quantity control valve operated by an electromagnetic operating device. At least one parameter of a braking pulse of the electromagnetic actuating device depends on an efficiency of the electromagnetic actuating device and / or on a supply voltage of a voltage source and / or on a temperature, in particular of a component of the fuel injection system or of the internal combustion engine.
Owner:ROBERT BOSCH GMBH

Implantation of gaseous chemicals into cavities formed in intermediate dielectrics layers for subsequent thermal diffusion release

The present invention generally relates to methods for increasing the lifetime of MEMS devices by reducing the landing velocity on switching by introducing gas into the cavity surrounding the switching element of the MEMS device. The gas is introduced using ion implantation into a cavity close to the cavity housing the switching element and connected to that cavity by a channel through which the gas can flow from one cavity to the other. The implantation energy is chosen to implant many of the atoms close to the inside roof and floor of the cavity so that on annealing those atoms diffuse into the cavity. The gas provides gas damping which reduces the kinetic energy of the switching MEMS device which then should have a longer lifetime.
Owner:QORVO US INC

Quick assembly type expressway multistage buffer guardrail

The invention discloses a quick assembly type expressway multistage buffer guardrail. The quick assembly type expressway multistage buffer guardrail comprises a moving unit, a multi-stage guardrail main body unit and an intelligent control unit; the moving unit comprises a sliding rail and a positioning rail which are in parallel, wherein the positioning rail comprises a fixing rail formed by a plurality of intervals; the multi-stage guardrail main body unit is arranged in the sliding rail in a sliding mode; the multi-stage guardrail main body unit comprises a plurality of sub-guardrails; eachsub-guardrail comprises a middle protective plate, a buffer protective plate and a supporting unit; each buffer protective plate comprises outer protective plates, pushing mechanisms and an air bag;the air bag is arranged between the front end outer protective plate and the middle protective plate; the pushing mechanisms are symmetrically connected to the corners of the front end outer protective plate and the middle protective plate; the rear end outer protective plate is connected to the rear side of the middle protective plate in a vertically movable manner; and the intelligent control unit comprises a controller, a stress monitoring module and an impact guardrail track prediction module. According to the quick assembly type expressway multistage buffer guardrail of the invention, through multi-stage buffering, the collision speed of a vehicle is greatly reduced, and casualties and damage to the vehicle are reduced to the minimum.
Owner:江苏顺康交通科技有限公司
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