Abstract: An axial-flow fan includes an impeller including plural blades fixed to an outer peripheral portion of the hub and each surrounded by an inner peripheral edge, an outer peripheral edge, a leading edge, and a trailing edge. The leading edge is forward-curved in a rotational direction with an angle increasing to outer periphery of the impeller and runs toward an outer periphery up to point A, the trailing edge is forward-curved in the rotational direction and runs toward the outer periphery up to point D, recedes in the rotational direction of the impeller as the trailing edge runs toward the outer periphery up to point A? located closer to the outer periphery than point D is to the outer periphery, advances in the rotational direction of the impeller in a region between point A? and point B?, and reflexed at point D and point A?.

Abstract: In a propeller fan, an air-sending device and an air-conditioning apparatus, between a leading edge and trailing edge of each of blades, a starting point at which the first one of first maximum points is located is closer to the leading edge than a starting point at which the first one of second maximum points are located, distances L1 between minimum points and the first maximum points vary such that the distance L1 increases from the starting point at which the first one of the first maximum points is located, toward the trailing edge, and distances L2 between a connection point and the second maximum points vary in accordance with the position of each of the second maximum points such that the distance L2 increases from the starting point at which the first one of the second maximum points is located, toward the trailing edge.

Abstract: In a propeller fan, an air-sending device and an air-conditioning apparatus, between a leading edge and trailing edge of each of blades, a starting point at which the first one of first maximum points is located is closer to the leading edge than a starting point at which the first one of second maximum points are located, distances L1 between minimum points and the first maximum points vary such that the distance L1 increases from the starting point at which the first one of the first maximum points is located, toward the trailing edge, and distances L2 between a connection point and the second maximum points vary in accordance with the position of each of the second maximum points such that the distance L2 increases from the starting point at which the first one of the second maximum points is located, toward the trailing edge.

Abstract: An axial-flow fan includes an impeller including plural blades fixed to an outer peripheral portion of the hub and each surrounded by an inner peripheral edge, an outer peripheral edge, a leading edge, and a trailing edge. The leading edge is forward-curved in a rotational direction with an angle increasing to outer periphery of the impeller and runs toward an outer periphery up to point A, the trailing edge is forward-curved in the rotational direction and runs toward the outer periphery up to point D, recedes in the rotational direction of the impeller as the trailing edge runs toward the outer periphery up to point A? located closer to the outer periphery than point D is to the outer periphery, advances in the rotational direction of the impeller in a region between point A? and point B?, and reflexed at point D and point A?.

Abstract: An electrical connector having a cover case for fixing therein the connector. The cover case consists of two case halves arranged one upon the other. The cover case having at a take-up opening of a cable an inner sleeve through which the cable passes. The inner sleeve consists of two semicylinders fixed to the casing halves, respectively. The cover case further has an outer sleeve which, after the inner sleeve is covered by the outer sleeve, is caulked to provide urging force onto the inner sleeve against its outer surface. Abutment edges of the two semicylinders of the inner sleeve are formed as wave-shaped edges waved in the abutment plane of the abutment edges so that the wave-shaped edges of one semicylinder are not coincident with the wave-shape edges of the other semicylinder. In another embodiment, abutment edges of the two semicylinders of the inner sleeve are provided with projecting plate members extending in the abutment plane of the abutment edges.

Abstract: A mounting structure of lock pieces on a connector hood includes L-shaped lock piece support portions projecting from side surfaces of the connector hood and having free ends rising upwardly, respectively, and L-shaped window portions provided in the lock pieces and having provisional window portions and complete window portions, respectively. Each of the provisional window portions has a width for receiving one of the L-shaped lock piece support portions and a height much more than a thickness of the L-shaped lock piece support portion. On the other hand, each of the complete window portions is continuous to the provisional window portion at its upper end and has a width and a height somewhat more than the width and the thickness of the L-shaped lock piece support portion, respectively.