Abstract: A stator of an electric motor is rotated and a rotational force of the stator is used for a rotation of a rotor. Thus, the electric motor capable of obtaining high output is provided. A stator 40 is rotated in electric motors 80a, 80b. When rotating a rotor 30, a rotational force of the stator 40 is used for a rotation of the rotor 30. Consequently, higher output can be obtained compared to the conventional electric motor. In addition, the rotational force of the rotor 30 is accumulated as the rotational force of the stator 40 as kinetic energy. In case of a restarting or the like, since the rotational force of the stator 40 is used for the rotation of the rotor 30 as the kinetic energy, the energy loss is small and the kinetic energy of the rotor 30 and the stator 40 can be efficiently used. In addition, in the operation area where the stator 40 is rotated, counter electromotive force Ke or inductive reactance XL applied to coils 42 is reduced.

Abstract: A stator of an electric motor is rotated and a rotational force of the stator is used for a rotation of a rotor. Thus, the electric motor capable of obtaining high output is provided. A stator 40 is rotated in electric motors 80a, 80b. When rotating a rotor 30, a rotational force of the stator 40 is used for a rotation of the rotor 30. Consequently, higher output can be obtained compared to the conventional electric motor. In addition, the rotational force of the rotor 30 is accumulated as the rotational force of the stator 40 as kinetic energy. In case of a restarting or the like, since the rotational force of the stator 40 is used for the rotation of the rotor 30 as the kinetic energy, the energy loss is small and the kinetic energy of the rotor 30 and the stator 40 can be efficiently used. In addition, in the operation area where the stator 40 is rotated, counter electromotive force Ke or inductive reactance XL applied to coils 42 is reduced.

Abstract: An annular insert (4) is arranged in the optical component molding cavity of a mold to surround an outer periphery of raw material resin in a direction in which the resin is distributed in the cavity to limit the distribution of the raw material resin and define an outer profile of a lens (L). With this arrangement, it is only necessary to provide raw material resin only by a quantity equal to the volume of the region surrounded by the molding surfaces of upper and lower mold inserts (14, 24) and the inner peripheral edge of the annular insert (4) of the mold, so that the required volume of the raw material resin can be reduced. Since the pressure is preserved at the outer periphery of the distributed resin by the presence of the annular insert (4), the residual strain of the resin is minimized to prevent generation of sink mark, thereby providing excellent optical characteristics on the lens (L).

Abstract: An annular insert (4) is arranged in the optical component molding cavity of a mold to surround an outer periphery of raw material resin in a direction in which the resin is distributed in the cavity to limit the distribution of the raw material resin and define an outer profile of a lens (L). With this arrangement, it is only necessary to provide raw material resin only by a quantity equal to the volume of the region surrounded by the molding surfaces of upper and lower mold inserts (14, 24) and the inner peripheral edge of the annular insert (4) of the mold, so that the required volume of the raw material resin can be reduced. Since the pressure is preserved at the outer periphery of the distributed resin by the presence of the annular insert (4), the residual strain of the resin is minimized to prevent generation of sink mark, thereby providing excellent optical characteristics on the lens (L).

Abstract: The present invention provides a power transmitting apparatus having a continuously variable transmitting function which is effective as a transmission for an automobile. This power transmitting apparatus, which may be used as an automobile transmission, utilizes a winding effect of transmitting coils wrapped around a drum.

Abstract: A press includes a reciprocation unit having a crank structure which is driven in horizontal reciprocation by an associated press drive. A motion direction shifting unit having a link structure is coupled to the reciprocation unit a ram so as to reciprocate the ram vertically between an upper position and a lower rest position in response to the horizontal reciprocation of the reciprocation unit, such that the ram remains in a state of substantial rest with respect to the shifting unit for a predetermined period of time upon reaching the lower position. A control unit controls a hydraulic fluid supply system to cause a pressure applying device to apply a controlled press forming force to the ram when a sensor detects that the ram is in the rest state.

Abstract: A predetermined amount of melted thermoplastic resin of raw material is injected into a molding space which is previously set to a temperature higher than that at which the resin beings to harden under atmospheric pressure and which has a capacity larger than a volume of a product. The injected resin is cooled in the molding space and pressurized before the resin is cooled to the temperature at which the resin begins to harden under atmospheric pressure. When pressurized, the glass transition temperature of the thermoplastic resin is shifted to a higher temperature so that the thermoplastic resin hardens in slight reduction of the temperature. The resin is cooled in the pressurized state until the resin possesses the dynamic rigidity under room temperature and atmospheric pressure.

Abstract: An injection molding method with stamping compression obtains an optical lens or other molded article from thermoplastic resin. A cavity is heated to a temperature at which resin can be maintained in a molten state under normal temperature. Measured and molten resin is injected into the heated cavity through a sprue part, a runner part and a gate part. After the injection, the sprue part is sealed. The injected resin is maintained in the molten state at this time. The injected resin is then hardened in the heated cavity by applying a pressure which can provide a dynamic modulus of elasticity of the resin at the normal temperature and normal pressure. The resin hardened by the pressurization is then cooled to a removal temperature while reducing the pressure so as to maintain the dynamic modulus of elasticity of the resin at the dynamic modulus of elasticity of the resin at normal temperature and normal pressure.

Abstract: A new flow control valve comprises valve openings, having valve seats opened and closed by poppets, provided in fluid passages extending from an inlet port to an outlet port in the valve body, and a control mechanism to produce a changeover of pilot pressure and a setting of time lag in response to a pulse signal of variable frequency from a pulse oscillator provided for a pilot control section, the openings at the valve seats being opened and closed through the control of the frequency as well as the setting of the time lag, so that a flux of the fluid can be controlled exactly.

Abstract: A speed control device for stepping motor is disclosed which is possible to freely control the running speed of the stepping motor when driving it in closed loop. Its mechanism is designed to be possible to decide which excitation phase to be excited according to a phase difference between the output signals emitted from the encoder and the speed-variable reference clock signals and to make the running speed of stepping motor follow to the instruction of said reference clock signals.