Abstract: A nonvolatile semiconductor memory device that have a new structure are provided, in which memory cells are laminated in a three dimensional state so that the chip area may be reduced. The nonvolatile semiconductor memory device of the present invention is a nonvolatile semiconductor memory device that has a plurality of the memory strings, in which a plurality of electrically programmable memory cells is connected in series. The memory strings comprise a pillar shaped semiconductor; a first insulation film formed around the pillar shaped semiconductor; a charge storage layer formed around the first insulation film; the second insulation film formed around the charge storage layer; and first or nth electrodes formed around the second insulation film (n is natural number more than 1). The first or nth electrodes of the memory strings and the other first or nth electrodes of the memory strings are respectively the first or nth conductor layers that are spread in a two dimensional state.

Abstract: An internal combustion engine includes an oil seal mounted at a crankshaft of an internal combustion engine body to restrain leakage of oil to an outside of the internal combustion engine, an oil seal fixing member fixed to the internal combustion engine body to fix the oil seal to the internal combustion engine body, and a cover member assembled on a lateral surface portion of the internal combustion engine body in a direction in which the crankshaft extends, the cover member covering the oil seal fixing member from a side opposite to the internal combustion engine body, the oil seal fixing member being fixed to the internal combustion engine body at a fixing position which is provided at an inner side than an outer edge portion of the cover member fastened to the internal combustion engine body.

Abstract: An internal combustion engine includes an oil seal mounted at a crankshaft of an internal combustion engine body to restrain leakage of oil to an outside of the internal combustion engine, an oil seal fixing member fixed to the internal combustion engine body to fix the oil seal to the internal combustion engine body, and a cover member assembled on a lateral surface portion of the internal combustion engine body in a direction in which the crankshaft extends, the cover member covering the oil seal fixing member from a side opposite to the internal combustion engine body, the oil seal fixing member being fixed to the internal combustion engine body at a fixing position which is provided at an inner side than an outer edge portion of the cover member fastened to the internal combustion engine body.

Abstract: A water pump includes a rotation member, a hollow shaft portion having an opening on one end and connected to the rotation member for unitary rotating with the rotation member, an impeller connected to the shaft portion for unitary rotating with the shaft portion, a body defining a fluid chamber in which the impeller is rotated, a bearing for rotatably supporting the shaft portion on the body, a sealing member provided between the shaft portion and the body for sealing the fluid chamber and a cover portion for substantively closing the opening of the shaft portion.

Abstract: A water pump includes a driven portion, a shaft including a hollow portion for rotating with the driven portion as a unit, an impeller rotating with the shaft as a unit, a body including a cylindrical supporting portion inserted by the shaft, a bearing provided between an external peripheral surface of the supporting portion and an internal peripheral surface of the driven portion for rotatably supporting the driven portion, and a mechanical seal sealing one side of a cylindrical space defined between an external peripheral surface of the shaft and an internal peripheral surface of the supporting portion, wherein a vibration absorption member is provided in the hollow portion of the shaft.

Abstract: A water pump includes a rotation member, a hollow shaft portion having an opening on one end and connected to the rotation member for unitary rotating with the rotation member, an impeller connected to the shaft portion for unitary rotating with the shaft portion, a body defining a fluid chamber in which the impeller is rotated, a bearing for rotatably supporting the shaft portion on the body, a sealing member provided between the shaft portion and the body for sealing the fluid chamber and a cover portion for substantively closing the opening of the shaft portion.