41results about How to "Large thermal expansion" patented technology

A thin-film magnetic head that has a configuration in which the element-formed surface and the opposed-to-medium surface are perpendicular to each other, and a light source is sufficiently distanced from the medium surface is provided. The head comprises at least one near-field-light-generating layer for heating a part of a magnetic medium during write operation by generating a near-field light, having a shape tapered toward a head end surface on the opposed-to-medium surface side, and comprising a near-field-light-generating portion having a light-received surface and a tip reaching the head end surface on the opposed-to-medium surface side, and the light-received surface being sloped in respect to the element-formed surface and being provided in a position where an incident light propagating from a head end surface opposite to the opposed-to-medium surface can reach at least a part of the light-received surface.

A range finder includes a package, a semiconductor chip, an optical casing, a lens holder, a first lens, and a second lens. The first and second lenses are attached to the lens holder. The lens holder is formed of a material having a thermal expansion coefficient equal or close to that of the semiconductor chip. The range finder is constructed such that a distance between the two lenses and a distance between two light detecting sections on the semiconductor chip do not change significantly relative to each other due to the thermal expansion or contraction.

The invention discloses a rapid type pipeline connector. The rapid type pipeline connector comprises a pipeline connector, one or more rapid type connecting ports used for external connecting pipelines are formed in the pipeline connector, the inner wall of each rapid type connecting port is provided with a circle of connecting groove communicating to the end surface of the rapid type connecting port, and a sealing assembly is placed in each connecting groove. Each rapid type connecting port is sleeved with a rapid connecting assembly, and each rapid connecting assembly comprises a rapid connecting inner annular cover, an outer cylinder cover and a receding stopping sleeve, wherein the rapid connecting inner annular cover sleeves the corresponding connecting port and blocks the outside of the sealing assembly, the outer cylinder cover sleeves the corresponding rapid connecting inner annular cover and the corresponding connecting port, and the receding stopping sleeve is mounted in the corresponding outer cylinder cover and located at the outside of the corresponding rapid connecting annular cover. The external connecting pipelines can penetrate through the receding stopping sleeves and the rapid connecting inner annular covers to be inserted into the sealing assemblies in the connecting ports. According to the rapid type pipeline connector, rapid mounting and dismounting operation of the external connecting pipelines can be achieved, modularized connecting of multiple rapid connecting pipe fittings can be further achieved, and use is flexible and convenient.

The invention relates to assembling members (1, 2) using bearings to assemble a rotating shaft (3) in a housing (4). Each bearing comprises an outer ring (5) and an inner ring (6), each assembling member has an annular accommodation part defined between an inner bearing surface (8) of the housing (4) and an outer bearing surface (9) of a shaft (3), the bearing is arranged in the annular accommodation part, he inner ring (6) is mounted in a clamping manner surrounding the outer bearing surface (9), the thermal expansion of the outer ring (5) is lower than that of the inner bearing surface (8), each assembling member also comprises a sleeve (10) made of thermoplastic material, the sleeve in inserted between the inner bearing surface (8) and the outer ring (5), the thermal expansion of the sleeve is larger than that of the outer ring (5), the sleeve has an annular geometrical shape which is broken by a slot (11) in a circumferential direction, so that the diameter of the sleeve can be changed, and under the ambient temperature, radial clearances are formed between the inner bearing surface and the sleeve and/or between the sleeve and the outer ring.

A gear transmission is provided including at least a first and a second shaft with substantially fixed and substantially parallel axes of rotation, a transmission housing with a first and a second wall that extends perpendicular to the axes of rotation, and a plurality of gearwheels that are rotationally fixed or rotationally fixable to the shafts. The shafts include at least one input shaft and at least one output shaft, the shafts being suspended by bearings that are seated in the first and second walls. The first wall is connected to the second wall with at least one rod in order to reduce deflections in operation of the first and second walls.

A filler for resinous composition is contained and used in resinous composition, and includes: a crystalline siliceous particulate material with a crystal structure made of at least one member selected from the group consisting of type FAU, type FER, type LTA and type MFI, and type MWW; and a surface treatment agent including an organic silica compound reacted with or adhered to a surface of the crystalline siliceous particulate material; the filler including the surface treatment agent in an amount falling in a range allowing the filler to exhibit a negative thermal expansion coefficient.

A piston for a cylinder for an internal combustion engine has a piston bowl surface adapted for facing a combustion chamber of the cylinder, the piston bowl surface being provided with a thermal barrier coating layer, wherein the thermal barrier coating layer is provided on a plurality of circumferentially spaced surface parts of the piston bowl surface. A method for producing a piston for a cylinder for an internal combustion engine includes the steps of providing a piston for a cylinder for an internal combustion engine, the piston having a piston bowl surface adapted for facing a combustion chamber of the cylinder, and providing the piston bowl surface with a thermal barrier coating layer, wherein the step of providing the thermal barrier coating layer is made on a plurality of circumferentially spaced surface parts of the piston bowl surface.

A filler for resinous composition is contained and used in resinous composition constituting electronic packaging material for electronic device, and includes: a filler ingredient including a crystalline siliceous material with a crystal structure made of at least one member selected from the group consisting of type FAU, type FER, type LTA, type MFI and type CHA, and/or type MWW, wherein: the filler ingredient is free of any activity when evaluated by an “NH3-TPD” method; and includes the crystalline siliceous material in an amount falling in a range allowing the filler ingredient to exhibit a negative thermal expansion coefficient. The filler ingredient may further be free of a surface in which silver, copper, zinc, mercury, tin, lead, bismuth, cadmium, chromium, cobalt and nickel are exposed.

Four rod electrodes (50a to 50d) for separating ions according to a mass-to-charge ratio are held by a rod holder (51). The rod holder (51) is placed on a metal holder sustaining stand (52) provided on a bottom surface of a vacuum housing (1), and is fixed while being pressed by a fixation band (53) fixed to the holder sustaining stand (52) with screws (56). The fixation band (53) has a coating film layer (532) formed by a black nickel plating process on the entire surface of a main member (531) made from phosphor bronze. The coating film layer (532) has high emissivity, and thus heat transferred from the rod holder (51) to the fixation band (53) is efficiently radiated into the vacuum housing (1). Therefore, heat generated in the rod holder (51) due to dielectric loss is efficiently dissipated, and deformation of the rod holder can be reduced.

A method of manufacturing KNbO₃ single crystal thin film having single-phase high quality and excellent morphology on each of single crystal substrates. A surface acoustic wave element, frequency filter, frequency oscillator, electronics circuit, and electronic device employ the thin film manufactured by the method, and have high k², and are wideband, reduced in size and economical in power consumption. A plasma plume containing K, Nb, and O in the range 0.5≦x≦x_E is supplied to a substrate, where x is a mole ratio of niobium (Nb) to potassium (K) in K_xNb_1-xO_y, and x_E is a mole composition ratio at the eutectic point for KNbO₃ and 3K₂O.Nb₂O₅ under a predetermined oxygen partial pressure. Maintaining the temperature T_s of the substrate in the range T_E≦T_s≦T_m where T_E represents the temperature at the eutectic point and T_m represents a complete melting temperature, the KNbO3 single crystal is precipitated from the K_xNb_1-xO_y deposited on the substrate.

The invention relates to a base aiming at aluminum alloy cold plate brazing. The base is characterized in that the base comprises base plates (4) and a supporting plate (5), and the multiple base plates (4) are arranged on the supporting plate (5) at intervals; and during welding, an upper cover plate (1) and a lower bottom plate (2) of an aluminum alloy cold plate are placed on the base and thenplaced into a stainless steel tool frame, fastening force is applied, and then welding is carried out. The base has the advantages that according to the overall technological path, a base plate used in a traditional method for aluminum alloy cold plate brazing is broken up into parts, the form of multiple base plates are arranged is designed, the influence of friction plate of the base plates andthe lower bottom plate of the cold plate on brazing is reduced, and brazing quality is improved.

The invention discloses a preparation method of a high-strength waterproof rock wool board, and belongs to the field of rock wool boards; a cohesion ball is creatively added in the process of producing the rock wool board by using the existing three-dimensional method to improve the cohesion of the rock wool board; on one hand, after the cohesion ball absorbs the heat of rock wool fibers, a pushing ball is expanded to push out a puncture rod, and the puncture rod penetrates through a plurality of layers of rock wool fibers to increase the cohesion of the rock wool fibers; on the other hand, the heat enables a heat shrinkage wrapping film to shrink so as to extrude a hydrophobic agent, the missing part can be filled with the hydrophobic agent to cover, the waterproof performance is effectively improved, the appearance of the cohesion ball is similar to the shape of octopus, a plurality of tentacles drag surrounding rock wool fibers, the strength of the rock wool board is effectively improved, and the rock wool board is prevented from cracking and falling off.

The invention relates to a water dispenser. The water dispenser comprises a bucket, a cold water tank, a water outlet pipe and a hot water tank, wherein the upper end of the cold water tank is provided with a smart seat internally provided with a smart head, and the bucket is connected to the cold water tank through the smart seat; the lower portion of the cold water tank is connected to the upperend of the water outlet pipe; the lower portion of the water outlet pipe forks to form two branch pipes, namely the first branch pipe and the second branch pipe, and the first branch pipe is connected with a water outlet valve to form a cold water outlet; the second branch pipe is connected with the hot water tank to supply cold water to the hot water tank; the side wall of the hot water tank isconnected with a hot water outlet pipe; the second branch pipe is connected with the hot water tank through a hot water reflux prevention unit, the hot water reflux prevention unit is internally provided with a heating expansion element, the heating expansion element is connected with a valve plate, and the valve plate is opposite to a port of the second branch pipe; the heating expansion elementis heated to expand to drive the valve plate to move to the port of the second branch pipe, thereby blocking the port of the second branch pipe, so that the second branch pipe is disconnected with thehot water tank to avoid the situation that hot water flows back into the cold water tank.

A method for producing an electronic module (10) is proposed in which a sensor element (18) having a mounting device (30) is attached to an external surface (16) of a printed circuit board element (14), wherein the sensor element (18) has a sensor area (22) and a base area (20) that can be plasticized at least in sections. The method is characterized in particular in that the base area (20) is plasticized up to a plasticization length (44) that is measured from the base surface (19) of the sensor element (18) in a z direction (24); the plasticized base area (20) and the external surface (16) of the printed circuit board element (14) are joined together such that the sensor area (22) is arranged with a defined positioning accuracy at a target distance (50) to a reference point (36a) which is fixed relative to the external surface (16), and the plasticized base area (20) is subsequently solidified, wherein the positioning accuracy is smaller than the plasticization length (44). As a result of this, the sensor area (22) can be arranged with accuracy at the target distance (50) independently of the component tolerance of the printed circuit board element (14) and/or of the sensor element (18), which accuracy is exclusively determined by the mounting device (30).

The invention proposes a method (2) for coating a turbine blade (1) comprising an airfoil (4) and at least one platform arranged at the end of the airfoil (4) (2), wherein the or each platform (2) has a contact region (6) and at least one planar raised region (8a, 8b) adjacent to the contact region (6), and the airfoil ( 4) terminating in the contact zone (6), with the following method steps: applying at least a first layer (22) of the coating (24) on the airfoil side on the platform (2), and applying the coating (24) ) of the at least first layer (22) remaining on the end face (10c) within the range of the contact zone (6), the at least first layer (22) of the coating (24) in the protruding zone (8a, 8b) are removed from at least one end face (10a, 10b) of the platform (2).

A second fluid having a higher temperature than a first fluid, which flows in a duct, flows in contact with outside fins. Opposed regions of each power generation module and the duct apply pressure to and in contact with each other. Opposed regions of each power generation module and a corresponding one of a first outside plate and a second outside plate apply pressure to and in contact with each other. The duct is formed from a material having a thermal expansion coefficient larger than the first outside plate and the second outside plate. Additionally, two power generation modules are not necessarily required, and at least one power generation module is provided.