Abstract: A lubricating oil composition for transmissions having improved fuel saving properties, excellent metal fatigue prevention properties, and heat resistance containing: a lubricating base oil containing (A) a mineral base oil having a 100° C. kinematic viscosity of 1.5 mm2/s or higher and 3.5 mm2/s or lower, a pour point of ?25° C. or lower, a viscosity index of 105 or greater, a % CP of 85 or greater, a % CN of 2 or greater and 20 or less and a % CA of 3 or less and (B) a monoester-based base oil having a 100° C. kinematic viscosity of 2 to 10 mm2/s; (C) a phosphorus acid ester; and (D) a boronated ashless dispersant, the ratio of the mass percent of boron to the mass percent of phosphorus in the composition (B/P) being from 0.07 to 0.42, and the composition having a 100° C. kinematic viscosity of 2.5 to 4.0 mm2/s is described.

Abstract: A lubricating oil composition for transmissions having improved fuel saving properties, excellent metal fatigue prevention properties, and heat resistance containing: a lubricating base oil containing (A) a mineral base oil having a 100° C. kinematic viscosity of 1.5 mm2/s or higher and 3.5 mm2/s or lower, a pour point of ?25° C. or lower, a viscosity index of 105 or greater, a % Cp of 85 or greater, a % CN of 2 or greater and 20 or less and a % CA of 3 or less and (B) a monoester-based base oil having a 100° C. kinematic viscosity of 2 to 10 mm2/s; (C) a phosphorus acid ester; and (D) a boronated ashless dispersant, the ratio of the mass percent of boron to the mass percent of phosphorus in the composition (B/P) being from 0.07 to 0.42, and the composition having a 100° C. kinematic viscosity of 2.5 to 4.0 mm2/s is described.

Abstract: A humidifier device for use in fuel cells comprising a mist humidifier unit for adding mists to process gas supplied to an electrolyte equipped in a fuel cell and a humidifier unit control device for intermittently operating the mist humidifier unit in accordance with operating condition of the fuel cell.

Abstract: In an electric furnace including a heating device which includes a cooling water passage for cooling the heating device to prevent the heating device from melting, estimation of a molten metal temperature in the electric furnace using a heat equilibrium model is conducted taking into account a thermal loss by the cooling water, i.e., the amount of a heat taken away by the cooling water. Further, the amount of the cooling water flowing through the heating device is adjusted so that the thermal loss by the cooling water is in a predetermined optimum thermal loss range.

Abstract: An axial flow fan having auxiliary blades which includes a hub rotatably supported and driven by a drive source, a plurality of fan blades extending radially outwardly from the hub and at least one auxiliary blade projecting from an outer part on a suction and/or pressure surface of the fan blade and extending in the chord-length direction in such a manner that the leading region of the auxiliary blade is located nearer to the central axis of the fan than the trailing region thereof. A supplementary angle .theta..sub.0 of an angle formed between a chord line connecting to a leading edge and a trailing edge of the outer auxiliary blade and a reference line decided by the shape or operation of the fan blade has the relation; 5.degree..ltoreq..theta..sub.0 .ltoreq.40.degree.. A supplementary angle .theta..sub.

Abstract: An axial flow fan having an auxiliary blade wherein a hub member is rotatably supported and driven by a drive source, a plurality of blades are provided having a predetermined angle with respect to the rotational direction thereof and a predetermined width and height, the blades being radially provided on the hub member, and at least one auxiliary blade is disposed on at least one of a suction and pressure surface of the blades and extends beyond an end portion of a trailing edge thereof and substantially within a predetermined length in the width direction of the blade of the surface thereof, a leading edge of the auxiliary blade being positioned closer to an axis of the fan than a trailing edge of the auxiliary blade.The axial flow fan having such an auxiliary blade increases the radial flow by the extending portion of the auxiliary blade.

Abstract: An axial flow fan having auxiliary blades comprises a hub member rotatably supported and driven by a drive source, a plurality of main blades having a predetermined angle with respect to the rotational direction thereof and a predetermined width and height, the main blades being radially provided on the hub member, at least one auxiliary blade formed on at least one of a suction surface and a pressure surface of each main fan blade and having a predetermined length in the width direction of the main fan blade, a leading edge of the auxiliary blade being positioned closer to the axis of the main fan blade than a trailing edge of the auxiliary blade, a shroud comprising a thin hollow member having a large opening and a small throttled opening at opposite ends thereof, and the main fan blade being inserted within the shroud from the small throttled opening toward the large opening of the shroud.

Abstract: An axial flow fan includes a plurality of auxiliary blades disposed upon and projecting from the suction and/or pressure surfaces of primary fan blades radially disposed on a hub member. The auxiliary blades extend substantially in the width direction or transversely of the primary blades, and the leading edges of the auxiliary blades, as viewed in the rotational axis direction of the fan, are disposed closer to the rotational center of the hub member than the trailing edges of the auxiliary blades. In this manner, the axial flow fan produces an axial fluid flow by means of the primary blades and a radial fluid flow by means of the auxiliary blades.