686 results about "Pre compression" patented technology

Prediction-based compression engines are spoon-fed with sequentially efficiently compressible (SEC) streams of input data that make it possible for the compression engines to more efficiently compress or otherwise compact the incoming data than would be possible with streams of input data accepted on a TV-raster scan basis. Various techniques are disclosed for intentionally forming SEC input data streams. Among these are the tight packing of alike files or fragments into concatenation suitcases and the decomposition of files into substantially predictably consistent (SPC) fragments or segments that are routed to different suitcases according to their type. In a graphics-directed embodiment, image frames are partitioned into segment areas that are internally SPC and multidirectional walks (i.e., U-turning walks) are defined in the segment areas where these defined walks are traced during compression and also during decompression. A variety of pre-compression data transformation methods are disclosed for causing apparently random data sequences to appear more compressibly alike to each other. The methods are usable in systems that permit substantially longer times for data compaction operations than for data decompaction operations.

A reservoir configured to retain a volume of liquid for use in an apparatus for humidifying a flow of pressurised air comprises a base portion and a lid portion. The reservoir may be configured to improve its level of thermal contact to the heater plate using the flow of pressurised air. The reservoir may be configured to improve thermal contact between the reservoir and the heater plate by pre-compression upon engagement of the reservoir with the humidifier. The reservoir may comprise a removable intermediate portion, which may include the inlet tube and/or the outlet tube, for improved access for cleaning. The reservoir may also be configured to prevent overfilling. Overfill prevention features in the reservoir may include defined flow egress paths and/or formation of air locks.

A firearm noise suppressor having an internal base frame member with a plurality of inserts mounted thereto. In one form the suppressor is provided with a slip chamber allowing gas to be forwarded to a longitudinally forward chamber for pre-compression of gas therein.

In exemplary embodiments of the present invention, Flair® based aerosol-type devices can be provided. Such devices utilize a combination of Flair® technology, pre-compression valves and aerosol like pressurization of the dispensed liquid. Such a dispensing device has a main body comprising a pressure chamber, the latter being provided with a pressure piston and a pressure spring. The device further has a piston and a piston chamber which draws liquid from a reservoir and fills the pressure chamber with that liquid as a user operates the trigger in various compression and release strokes. The piston chamber has both an inlet valve and an outlet valve. In a dispensing head a valve is provided to regulate the strength of the flow and preclude leakage. Once the liquid is sufficiently pressurized, it can be dispensed by a user opening an activation valve, such as by pressing on an activation button, and spray can be abruptly stopped by a user ceasing to push on such button. Or, for example, in alternate embodiments without an activation button, once the liquid is sufficiently pressurized, continuous spray occurs until the pressure chamber is emptied. By repeatedly pumping the trigger before the pressure chamber is fully emptied, continuous spray can be achieved. By designing the input volume to be amply greater than the volume of the pressure chamber, continuous spray with fewer pumping strokes can be implemented.

The invention aims to provide a manufacturing method of film split polytetrafluoroethylene fibers with high intensity, high uniformity and low production cost. A process comprises the following steps of: mixing polytetrafluoroethylene micro-powder and a lubricant; stirring; standing; performing pre-compression molding; performing press molding; performing calendaring molding; drying; cutting; performing primary hot stretching; performing secondary hot stretching; performing heat shaping; and winding so as to obtain high-intensity polytetrafluoroethylene fibers. In the manufacturing process, temperatures during drying, cutting, primary hot stretching, secondary hot stretching and heat shaping rise in turn.

Prediction-based compression engines are spoon-fed with sequentially efficiently compressible (SEC) streams of input data that make it possible for the compression engines to more efficiently compress or otherwise compact the incoming data than would be possible with streams of input data accepted on a TV-raster scan basis. Various techniques are disclosed for intentionally forming SEC input data streams. Among these are the tight packing of alike files or fragments into concatenation suitcases and the decomposition of files into substantially predictably consistent (SPC) fragments or segments that are routed to different suitcases according to their type. In a graphics-directed embodiment, image frames are partitioned into segment areas that are internally SPC and multidirectional walks (i.e., U-turning walks) are defined in the segment areas where these defined walks are traced during compression and also during decompression. A variety of pre-compression data transformation methods are disclosed for causing apparently random data sequences to appear more compressibly alike to each other. The methods are usable in systems that permit substantially longer times for data compaction operations than for data decompaction operations.

A composite structure (3) includes a piezoelectric element (1) sandwiched between fiber composite panels (2). The composite structure can be used as an actuator element. In a method for producing the composite structure, the fiber composite panels are pre-stressed and pre-strained by applying respective pre-stressing forces (F1, F2) in opposite directions along two substantially perpendicular axes in the plane of the panel. The pre-stressed and pre-strained condition of the fiber composite panels (2) is maintained, while the panels are adhesively bonded (5) surfacially onto the piezoelectric element (1). After the bonding is completed, the pre-stressing forces are removed from the fiber composite panels. As a result, in the finished composite structure (3), the fiber composite panels (2) are under internal tension, while the piezoelectric element (1) is under internal compression. The pre-stressing forces (F1, F2) are particularly selected in magnitude and direction to achieve the required resultant balance of tension and compression within the composite structure (3). The pre-compression of the piezoelectric element (1) should be sufficient so that operating loads on the composite structure do not result in tension loading of the piezoceramic element, while substantially maintaining the useful active strain range of the overall composite structure.

Prediction-based compression engines are spoon-fed with sequentially efficiently compressible (SEC) streams of input data that make it possible for the compression engines to more efficiently compress or otherwise compact the incoming data than would be possible with streams of input data accepted on a TV-raster scan basis. Various techniques are disclosed for intentionally forming SEC input data streams. Among these are the tight packing of alike files or fragments into concatenation suitcases and the decomposition of files into substantially predictably consistent (SPC) fragments or segments that are routed to different suitcases according to their type. In a graphics-directed embodiment, image frames are partitioned into segment areas that are internally SPC and multidirectional walks (i.e., U-turning walks) are defined in the segment areas where these defined walks are traced during compression and also during decompression. A variety of pre-compression data transformation methods are disclosed for causing apparently random data sequences to appear more compressibly alike to each other. The methods are usable in systems that permit substantially longer times for data compaction operations than for data decompaction operations.

The ultrasound motor is composed of subassemblies of stator, mover and bracket. The stator consists of stepped cylinder, eight pieces of piezoelectric ceramics (PC), pressing block, support and two driving wheels. Electrodes distributed along circumferencial direction evenly are plated on surface of PC. Mover includes slide block and slide bar. The slide bar is contacted to two drive feet of the stator; and the slide bar is fixed on the bracket. The mover is held between bracket and stator. Through supporting effect, springs and nuts on the bracket provide needed pre-compression between stator and mover. Through different fan-shaped electrodes, the drive signal acts on pieces of PC. Under inverse piezo effect, PCs vibrate to excite a natural vibration of stator so as to realize reciprocating rectilinear motion of slide block of mover. Realizing rectilinear motion in two directions of mover, the motor provides features of large output force and speed, and higher efficiency.

The square baler comprises a pick-up a pre-compression chamber, a baling chamber, a loading mechanism for transferring each slice of crop from the pre-compression chamber into the baling chamber and a plunger. The baler further can include at least one non-contact sensor that is provided in at least one of the walls of the pre-compression chamber and/or of the input zone of the baling chamber to produce an output signal indicative of the density of the crop.

The invention belongs to a prestressed concrete and steel combined tower on which a self-support wind generator set can be assembled and an anchoring method of the prestressed concrete and steel combined tower. The prestressed concrete and steel combined tower comprises a fan foundation and a steel tower cylinder section above the fan foundation and further comprises a prefabricated concrete tower cylinder section and a prefabricated concrete conversion section, and the fan foundation, the prefabricated concrete tower cylinder section, the prefabricated concrete conversion section and the steel tower cylinder section are sequentially connected through prestress anchor sheaves in the sequence from bottom to top. According to the prestressed concrete and steel combined tower on which the self-support wind generator set can be assembled and the anchoring method of the prestressed concrete and steel combined tower, a tower used for the wind generator set is divided into the concrete part and the steel part which are connected through the prefabricated concrete conversion section, and concrete is in a pre-compression state through tensioning of the internal and external prestress anchor sheaves. The concrete tower cylinder section is divided into a plurality of sections according to an actual project and formed by prefabricating and splicing in the sequence of ring pieces-ring sections-segments. The prestressed concrete and steel combined tower has the advantages of being good in quality, low in manufacturing cost, convenient to maintain and the like, the construction method is simple, and the construction speed is high.

A voice coil motor. At least one guide bar is connected to a fixed base. A coil is connected to the fixed base. A support base is movably fit on the guide bar. An annular magnetic member is connected to the support base and surrounded by the coil. A magnetization direction of the annular magnetic member parallels a moving direction of the support base and annular magnetic member. The annular magnetic member includes a first magnetic pole and a second magnetic pole. The first magnetic pole is disposed in the coil and separated from the bottom thereof. The second magnetic pole is disposed outside the coil. The coil interacts with the annular magnetic member to generate a first force, driving the support base and annular magnetic member to move along the magnetization direction of the annular magnetic member.

The invention discloses a system for recognizing rolling guide rail joint surface dynamic characteristic parameters and a control method. The system has a double-guide rail connecting plate symmetric structure; a normal compression device and a tangential compression device are prevented from rigid contact, so that the recognition of normal and tangential dynamic parameters in different pre-compression states is realized; a base consists of an experimental bench and a replaceable adjusting block corresponding to a corresponding rolling guide rail set; the experimental bench is provided with an O-shaped groove or symmetric notch structure; the replaceable adjusting blocks with different specifications are connected with the experimental bench at the same mounting position; each group of replaceable adjusting blocks are symmetrically arranged on the experimental bench, and one side of each of the replaceable adjusting blocks is pressed against a notch machining side face on the experimental bench to ensure parallelism of the replaceable adjusting blocks and position the replaceable adjusting blocks; a multi-guide rail, multi-connecting plate and single degree-of-freedom system design is realized on one experimental bench in different pre-compression states, so that the normal and tangential joint surface parameters are recognized; and the influence on an experimental device is eliminated. The reliable control method and a data processing system ensure that the experimental system is more perfect.

An energy conversion apparatus and method using recovered energy sources including motor vehicle kinetic energy (deceleration and shock) and wind resistance, supplemented by liquefied air transferred to the vehicle and by solar radiation thereto. The energy sources are combined, as available, to drive a compressor for supplying intake working fluid of a motor vehicle prime mover, wherein liquefied air provides pre-compression cooling of an atmospheric air portion of the working fluid. The liquefied air is made by recovered energy, stored and transferred between vehicles and between vehicles and stationary sites. In a hybrid version of the vehicle, exhaust heat from a combustion engine part of the prime mover increases working fluid temperature in a gas expander part, thereof; the engine and expander operating independently or together for improved vehicle propulsion efficiency.

The invention discloses a bidirectional self-adaptive damping valve which comprises a valve body, a valve core, a first valve base and a second valve base, wherein the valve core comprises a connecting body, a first valve core and a second valve core; the first valve core comprises a first half valve core, a first sliding piston and a first sensitive spring; the right end of the first half valve core is fixedly connected with the connecting body; the first half valve core is internally provided with a cavity; the left end of the first half valve core is axially provided with a first shaft hole; the first sliding piston is arranged in the cavity, one end of the first sliding piston passes through the first shaft hole at the left end of the first half valve core, and the other end of the first sliding piston is provided with a shaft shoulder for axially positioning; the first sensitive spring is arranged in the cavity, and is positioned between the first sliding piston and the connecting body. According to the invention, through the matched use of the valve core and the spring, the throttling and damping degree of the damping valve changes along with the pressure change at any end of the valve body, and the valve core is at the dynamic balanced state constantly; and through the setting of pre-compression amount of the spring, the pressure sensitivity of the damping valve within different ranges is realized, and the damping valve can adapt to the load pressure changes of all working conditions.