Abstract: A supported metallocene catalyst includes a carrier and a metallocene component. The carrier includes an inorganic oxide particle and an alkyl aluminoxane material. The inorganic oxide particle includes at least one inorganic oxide compound selected from the group consisting of an oxide of Group 3A and an oxide of Group 4A. The alkyl aluminoxane material includes an alkyl aluminoxane compound and an alkyl aluminum compound that is present in amount ranging from greater than 0.01 wt % to less than 14 wt % base on 100 wt % of the alkyl aluminoxane material. The metallocene component is supported on the carrier, and includes one of a metallocene compound containing a metal from Group 3B, a metallocene compound containing a metal from Group 4B, and a combination thereof. A method for preparing the supported metallocene catalyst and a method for preparing polyolefin using the supported metallocene catalyst are also disclosed.

Abstract: A pixel of an image sensor includes: a semiconductor material substrate; a photosensitive region formed in the substrate, the photosensitive region generating photo-induced electrical charge in response to illumination with light; a storage node formed in the substrate proximate to the photosensitive region, the storage node selectively receiving and storing photo-induced electrical charge generated by the photosensitive region; and a shield formed over the storage node which inhibits light from reaching the storage node, the shield including an extension which protrudes into the substrate and surrounds an outer periphery of the storage node.

Abstract: A method for manufacturing a semiconductor device includes forming a first dielectric layer over a semiconductor fin. The method includes forming a second dielectric layer over the first dielectric layer. The method includes exposing a portion of the first dielectric layer. The method includes oxidizing a surface of the second dielectric layer while limiting oxidation on the exposed portion of the first dielectric layer.

Abstract: An electric wheelchair with quick-release drive wheels includes: a chassis, and two guide wheels and two said drive wheels. The drive wheels are rotated by a drive mechanism and connected to the drive mechanism by a quick-release mechanism. To detach the drive wheel, the user can press the cover to make the rolling balls move out of the receiving groove and back to the arc-shaped engaging portion, which allows the hollow shaft to disengage from the drive shaft. Then, keeping pressing the cover can detach the drive wheel from the drive mechanism. To assemble the drive wheel, the user can press the hollow shaft into the axial hole to make the rolling balls engage in the receiving groove, so that the drive wheel is assembled to the drive mechanism. The assembly and disassembly of the drive wheel require no wrenches or other tools, and therefore are very convenient.

Abstract: A shock absorber includes an outer pipe, an inner pipe and an elastic rubber cushion. The outer pipe is a hollow structure. The inner pipe is disposed in the outer pipe to define a receiving space between the inner and outer pipes, and is a hollow structure rotatable with respect to the outer pipe. The elastic rubber cushion is disposed in the receiving space and fixed to an inner wall of the outer pipe and an outer wall of the inner pipe, respectively. The shock absorber works in rotation manner to absorb shocks, which not only enables the shock absorber to absorb forces in al directions, but also reduces the size of the shock absorber. Besides, the shock absorber uses the elastic rubber cushion as a buffer, which produces no noise during the process of shock absorbing.

Abstract: A damping assembly for a front-wheel independent suspension of a four-wheel mobility scooter includes a chassis with two front wheels, and two connecting sleeves. In each of the connecting sleeves is disposed a first shock absorber which includes a rectangular outer pipe and a rectangular inner pipe disposed in and rotated 45 degrees with respect to the outer pipe, between each of the edges of the inner pipe and the inner space of the outer pipe is disposed an elastic rubber The inner pipe has two suspension arms connected to a shaft, respectively, each shaft includes a first connecting arm extending in a width direction of the chassis, the front wheels are connected to the first connecting arms, on each of the shafts is provided a second connecting arm extending upward and hinged with a third connecting arm extending in the width direction of and hinged to the chassis.

Abstract: A damping assembly for a front-wheel independent suspension of a four-wheel mobility scooter includes a chassis with two front wheels, and two connecting sleeves. In each of the connecting sleeves is disposed a first shock absorber which includes a rectangular outer pipe and a rectangular inner pipe disposed in and rotated 45 degrees with respect to the outer pipe, between each of the edges of the inner pipe and the inner space of the outer pipe is disposed an elastic rubber The inner pipe has two suspension arms connected to a shaft, respectively, each shaft includes a first connecting arm extending in a width direction of the chassis, the front wheels are connected to the first connecting arms, on each of the shafts is provided a second connecting arm extending upward and hinged with a third connecting arm extending in the width direction of and hinged to the chassis.

Abstract: A wheel independent suspension system for a mobility scooter includes: a chassis, and front wheels and rear wheels. A rail is disposed at the rear end of the chassis and extends along a width direction of the chassis, two ends of the rail are each connected to a first shock absorber which includes a rectangular inner and outer rectangular inner pipe disposed in and rotated 45 degrees with respect to the outer pipe, the edges of the inner pipe are abutted against an inner surface of the outer pipe, between each of the edges of the inner pipe and the inner space of the outer pipe is disposed an elastic rubber, the rail is rectangular and inserted in the inner pipe, two first connecting sleeves are sleeved onto the outer pipe and each provided with a connecting rod to which are connected the rear wheels.

Abstract: A wheel independent suspension system for a mobility scooter includes: a chassis, and front wheels and rear wheels. A rail is disposed at the rear end of the chassis and extends along a width direction of the chassis, two ends of the rail are each connected to a first shock absorber which includes a rectangular inner and outer rectangular inner pipe disposed in and rotated 45 degrees with respect to the outer pipe, the edges of the inner pipe are abutted against an inner surface of the outer pipe, between each of the edges of the inner pipe and the inner space of the outer pipe is disposed an elastic rubber, the rail is rectangular and inserted in the inner pipe, two first connecting sleeves are sleeved onto the outer pipe and each provided with a connecting rod to which are connected the rear wheels.

Abstract: A four-wheel independent suspension system for an electric wheelchair includes a chassis, two front wheels each fixed to a front rod respectively, and two rear wheels each fixed to a rear rod respectively. The chassis includes a rail extending in a width direction of the chassis, each of the front and rear rods has one end connected to a square first connecting sleeve, in the first connecting sleeve is disposed a first shock absorber which includes a rectangular outer pipe, and a rectangular inner pipe disposed in and rotated degrees with respect to the outer pipe, the edges of the inner pipe are abutted against the inner surface of the outer pipe, between each of the edges of the inner pipe and the inner space of the outer pipe is disposed an elastic rubber, the inner pipe of each of the first shock absorbers is sleeved on the rail.

Abstract: An electronic device includes a circuit board and an electrostatic protection structure. The circuit board has a top surface and a bottom surface opposite to the top surface. The electrostatic protection structure is positioned on the top surface of the circuit board. The electrostatic protection includes an insulating layer and a conducting layer coating on the insulating layer. Four ground terminals are formed on the bottom surface of the circuit board. The insulating layer includes a main portion and four first connecting portions extending from the main portion. The conducting layer on the four first connecting portion are connected to the four first ground terminal.

Abstract: An electronic device includes a circuit board and an electrostatic protection structure. The circuit board has a top surface and a bottom surface opposite to the top surface. The electrostatic protection structure is positioned on the top surface of the circuit board. The electrostatic protection includes an insulating layer and a conducting layer coating on the insulating layer. Four ground terminals are formed on the bottom surface of the circuit board. The insulating layer includes a main portion and four first connecting portions extending from the main portion. The conducting layer on the four first connecting portion are connected to the four first ground terminal.

Abstract: A pressure relief device for a gear box which is disposed in the gear box and comprises a body, a blocking member and a spring. The body is defined with a penetrating hole. The spring pushes the blocking member and makes it seal the penetrating hole. When the pressure rises since the temperature therein is risen, and when the gas pressure in the gear box is larger than the force of the spring, the gas can push the blocking member and compress the spring, and then discharge from the penetrating hole of the body, thus reducing the pressure and the temperature of the gear box.

Abstract: a connector structure for a gearbox comprises a transmission rod, a bearing, two connecting members, a buffer, a clamping bush and a rod rack. The buffer is disposed between the two connecting members, the connecting members are received in the clamping bush, and then the clamping bush is installed in the bearing. The connecting members are provided for insertion of a transmission rod and a rod rack, and the buffer prevents the transmission rod from contacting the rod rack and can absorb the vibration generated during the motion transmission cause, and thus the noise is also reduced.

Abstract: The speed reducing mechanism comprises a housing, a power shaft, a bevel gear set, a drive shaft and a driven shaft. The power shaft, the drive shaft and the driven shaft are pivotally disposed in the housing, and the drive shaft is vertically connected to the driven shaft via the bevel gear set. The bevel gear and the bevel fluted disc of the bevel gear set are meshed with each other at a displacement angle. By such arrangements, the transmission efficiency of the speed reducing mechanism can be increased to 85-95%.