Abstract: A motor structure of an electric vehicle which is driven by an electric motor. The motor structure comprises an electric motor unit including the electric motor and differential gears, and a radiator for cooling the electric vehicle. Accessories are mounted on the electric motor unit. The radiator is positioned at a front side of the electric vehicle and in front of the electric motor unit. In this motor structure, one of universal joints, each of which connects a drive shaft on the differential gears side and a drive shaft on a wheel side, is adjacent to a side of the electric motor, which is in the form of a cylinder.

Abstract: A cooling system for a fuel cell and a fuel cell powered vehicle are disclosed. The cooling system and the fuel cell powered vehicle have a primary circulation passage adapted to circulate primary coolant for cooling the fuel cell, and a secondary circulation passage adapted to circulate secondary coolant for cooling a heat generating source including at least an electric vehicle motor. The primary coolant and the secondary coolant are driven by primary and secondary circulation pumps that are circulated by a single common drive motor, with the primary coolant being cooled with the secondary coolant in a common heat exchanger.

Abstract: A motor structure of an electric vehicle which is driven by an electric motor. The motor structure comprises an electric motor unit including the electric motor and differential gears, and a radiator as cooling means of the electric vehicle. Accessories are mounted on the electric motor unit. The radiator is positioned at a front side of the electric vehicle and in front of the electric motor unit. In this motor structure, one of universal joints, each of which connects a drive shaft on the differential gears side and a drive shaft on a wheel side, is adjacent to a side of the electric motor in the form of a cylinder.

Abstract: A motor 1 for traveling is attached to a frame 6 of a vehicle via mounts 3, 4 and 5 absorbing vibration. An air compressor 10 and an air compressor driving motor 11 are attached with respect to said motor 1 for traveling. The mounts 3, 4 and 5 are placed to be shared mounts absorbing vibration of the motor 1 for traveling, the air compressor 10 and the air compressor driving motor 11.

Abstract: A motor 1 for traveling is attached to a frame 6 of a vehicle via mounts 3, 4 and 5 absorbing vibration. An air compressor 10 and an air compressor driving motor 11 are attached with respect to said motor 1 for traveling. The mounts 3, 4 and 5 are placed to be shared mounts absorbing vibration of the motor 1 for traveling, the air compressor 10 and the air compressor driving motor 11.

Abstract: A cooling system for a fuel cell and a fuel cell powered vehicle are disclosed. The cooling system and the fuel cell powered vehicle have a primary circulation passage adapted to circulate primary coolant for cooling the fuel cell, and a secondary circulation passage adapted to circulate secondary coolant for cooling a heat generating source including at least an electric vehicle motor. The primary coolant and the secondary coolant are driven by primary and secondary circulation pumps that are circulated by a single common drive motor, with the primary coolant being cooled with the secondary coolant in a common heat exchanger.

Abstract: A method for polymerizing or copolymerizing .alpha.-olefin in a vapor phase condition by supplying to a reactor a catalyst composed of a solid catalyst component containing at least titanium and/or vanadium as well as magnesium and an organic aluminum compound wherein the current due to the electric charge transferred from polymer particles electrified to an electrode disposed at a position where sheet-like polymers will be produced in a reactor, as a result of contact of the polymer particles in the reactor with the electrode is determined, and the polymerization or copolymerization is carried out under such condition where the mean value of current is zero or a positive value. As a result, it becomes possible to prevent production of sheet-like polymers and to stably continue the reaction for polymerization.

Abstract: In the polymerization of olefins with a vapor phase fluidized bed reactor, the improvement comprises the steps of feeding seed polymer particles and the reaction is then started after feeding an organoaluminum compound on a prescribed basis, thereby avoiding the formation of sheet-like polymer in the initial period of the reaction and the lowering of the bulk density of the product polymer.

Abstract: In the polymerization of olefins using a catalyst comprising an organoaluminum compound and solid catalyst components containing titanium and/or vanadium; and magnesium in a vapor phase fluidized bed, the formation of sheet-like polymer and other abnormal conditions in the initial stage of the polymerization are avoided by means of previous drying of the reactor by feeding an organoaluminum compound prior to the feeding of seed polymer, the quantity of said organoaluminum compound being calculated by the following equation (I):A=k.multidot.V.sup. 2/3 (I)wherein A is the feed quantity (mol) of the organoaluminum compound, k is a coefficient (mol/m.sup.2) in the range from 0.15 to 4, and V is the volume (m.sup.3) of the whole system including gas circulation pipings.

Abstract: A process for feeding a powder catalyst with a gas intermittently to a high-pressure fluidized bed reactor for the vapor phase polymerization of olefin, wherein the cross section of a catalyst feed pipe is reduced midway through the pipe to thereby make continual catalyst feeding possible and prevent the formation of a lump polymer.

Abstract: A rotor assembly for a screw pump has a light alloy rotor main body having an axially extending central bore. A steel shaft is press-fitted into the central bore. A diametrically extending fixing pin is press-fitted through the rotor main body and the shaft. Friction forces between the rotor main body and the shaft are arranged to be larger on a discharge side of the rotor assembly than on a suction side thereof. The fixing pin is disposed at substantially a central position of entire friction forces in terms of their directions and magnitudes.

Abstract: A screw pump having a pair of screw rotors meshed with each other and rotatably supported in a housing having an intake port provided at one end and a piston movably provided at the other axial end of the housing, which piston defines a discharge port in cooperation with the housing. The movement of the piston in a direction substantially perpendicular to the axes of the screw rotors enables the distance between a discharge starting position of the discharge port and the intake port to be varied, so that the internal compression ratio can be varied. This arrangement ensures that the size of the housing will not be increased and any disadvantage due to the difference in thermal expansion along the length of the housing can be overcome.

Abstract: A process for feeding a powder catalyst with a gas intermittently to a high-pressure fluidized bed reactor for the vapor phase polymerization of olefin, wherein the cross section of a catalyst feed pipe is reduced midway through the pipe to thereby make continual catalyst feeding possible and prevent the formation of a lump polymer.

Abstract: Provided is a method for vapor phase polymerization of olefins. An olefin gas is fed into a horizontal cylindrical vessel having a lower curved surface corresponding to 30 to 180 degrees of the circumference of the vessel and extending substantially the length of the vessel formed by a perforated plate having a multiplicity of holes spaced at intervals in the range of from 0.5 to 50 mm, through said plate from an olefin feed chamber mounted below and covering the plate. A polymer catalyst is fed into the horizontal cylindrical vessel through a polymerization catalyst inlet port located in a portion of the vessel other than the lower curved surface formed by the perforated plate. The olefin is reacted in the presence of a catalyst with agitation to form polymer. Unreacted olefin is removed through a discharge port located in a portion of the vessel other than the lower curved surface formed by the perforated plate.

Abstract: A horizontal agitation bed type vapor phase polymerization apparatus for olefins provided on its lower curved surface with plural cells each having an opening facing on the polymerization reaction system and further having small holes formed in its side wall portion for feeding a starting olefin gas.

Abstract: A horizontal agitation bed type vapor phase polymerization apparatus for olefins, having a lower curved surface constructed by a perforated plate so as to allow a olefin gas to be fed uniformly throughout the reaction system through the said perforated plate.