Abstract: An axial-flow fan includes: a hub; and blades disposed on an outer peripheral surface of the hub and spaced apart from each other in a circumferential direction. The hub includes: an outer wall having a tubular shape; an inner wall having a tubular shape and being disposed radially inward of the outer wall; a boss to which a shaft is mounted and that is disposed radially inward of the inner wall; a first sidewall connecting an end portion of the outer wall that is closer to a first side in a rotation axis direction of the hub with an end portion of the inner wall that is closer to the first side in the rotation axis direction; and a second sidewall connecting the end portion of the inner wall with an end portion of the boss that is closer to the first side in the rotation axis direction.

Abstract: A propeller fan includes a hub, and a plurality of wings provided at an outer circumference of the hub. Each of the wings includes a protrusion tapered and positioned on a rotation direction rear side in a radially outer portion of the wing, the protrusion includes a top positioned at a rearmost end in the rotation direction, an outer circumferential rear edge positioned radially outside the top, and an inner circumferential rear edge positioned radially inside the top, the outer circumferential rear edge includes a first serration having a first serration shape, and the inner circumferential rear edge includes a second serration having a second serration shape.

Abstract: An axial-flow fan includes: a hub; and blades disposed on an outer peripheral surface of the hub and spaced apart from each other in a circumferential direction. The hub includes: an outer wall having a tubular shape; an inner wall having a tubular shape and being disposed radially inward of the outer wall; a boss to which a shaft is mounted and that is disposed radially inward of the inner wall; a first sidewall connecting an end portion of the outer wall that is closer to a first side in a rotation axis direction of the hub with an end portion of the inner wall that is closer to the first side in the rotation axis direction; and a second sidewall connecting the end portion of the inner wall with an end portion of the boss that is closer to the first side in the rotation axis direction.

Abstract: A propeller fan includes a hub, and a plurality of wings provided at an outer circumference of the hub. Each of the wings includes a protrusion tapered and positioned on a rotation direction rear side in a radially outer portion of the wing, the protrusion includes a top positioned at a rearmost end in the rotation direction, an outer circumferential rear edge positioned radially outside the top, and an inner circumferential rear edge positioned radially inside the top, the outer circumferential rear edge includes a first serration having a first serration shape, and the inner circumferential rear edge includes a second serration having a second serration shape.

Abstract: Blades (20a to 20c) of a propeller fan (10) have different circumferential pitches ?1, ?2, and ?3. The blades (20a to 20c) have different masses so that the center of gravity of the propeller fan (10) is positioned on a rotational center axis (11) of the propeller fan (10). Blade body portions (42c) of the blades (20a to 20c) have different thicknesses. In contrast, camber lines of the blades (20a to 20c) in blade cross section have the same shape, projections of the blades (20a to 20c) on a plane perpendicular to the rotational center axis (11) of the propeller fan (10) have the same shape, and leading edge portions (41a to 41c) of the blades (20a to 20c) have the same shape. As a result, a propeller fan (10) having reduced noise and vibrations can be achieved.

Abstract: A fan includes: a shaft including an outer peripheral surface that includes a first circular-arc portion, and a first flat portion; and a boss portion including a fitting hole with an inner peripheral surface that includes a second circular-arc portion, and a second flat portion. The second circular-arc portion corresponds to the first circular-arc portion. The second flat portion corresponds to the first flat portion. One or both of the first flat portion and the second flat portion includes a notch in an end portion in a width direction of the one or both of the first flat portion and the second flat portion.

Abstract: In a blade of a propeller fan, an inclination angle (?) is made by a straight line passing through an outer circumferential side end and an inner circumferential side end of a radial cross section of the blade with a second plane orthogonal to a center axis of a hub. In a blade end of the blade, one end in front of the other end viewed in the rotation direction of the propeller fan is a leading blade end, while the other end behind the leading blade end is a trailing blade end. The blade is shaped such that the inclination angle (?) monotonically increases, in the direction from the intermediate position toward the trailing blade end, in an area extending from an intermediate position between the leading blade end and the trailing blade end to the trailing blade end.

Abstract: In a blade of a propeller fan, a position on a chord line where the camber becomes maximum is set as a maximum camber position A, and a ratio of a distance d between a leading edge and the maximum camber position A to a chord length c is set as a maximum camber position ratio. The end portion on the hub side of the blade is set as a blade root, and the end portion on the outer circumferential side of the blade is set as a blade end. In the blade, the maximum camber position ratio monotonically increases in the direction from the reference blade cross section located between the blade root and the blade end toward the blade end and becomes maximum at the blade end. Thus, fan efficiency of the propeller fan is improved.

Abstract: A fan unit includes: a fan casing having a long side corresponding to either a width or a depth of the fan casing, a short side corresponding to the other of the width or the depth, and an upper surface on which a blow-out grille is mounted; a fan housed in the fan casing and that blows out air from the blow-out grille; and a bell mouth comprising a cylindrical portion surrounding the fan inside the fan casing. The cylindrical portion includes two first arc regions each facing the short side of the fan casing, a second arc region facing the long side of the fan casing, and a guide portion disposed in at least one of the first arc regions. The guide portion includes an extended end portion.

Abstract: A fan unit includes: a fan casing having a long side corresponding to either a width or a depth of the fan casing, a short side corresponding to the other of the width or the depth, and an upper surface on which a blow-out grille is mounted; a fan housed in the fan casing and that blows out air from the blow-out grille; and a bell mouth comprising a cylindrical portion surrounding the fan inside the fan casing. The cylindrical portion includes two first arc regions each facing the short side of the fan casing, a second arc region facing the long side of the fan casing, and a guide portion disposed in at least one of the first arc regions. The guide portion includes an extended end portion.

Abstract: In a blade of a propeller fan, an inclination angle (?) is made by a straight line passing through an outer circumferential side end and an inner circumferential side end of a radial cross section of the blade with a second plane orthogonal to a center axis of a hub. In a blade end of the blade, one end in front of the other end viewed in the rotation direction of the propeller fan is a leading blade end, while the other end behind the leading blade end is a trailing blade end. The blade is shaped such that the inclination angle (?) monotonically increases, in the direction from the intermediate position toward the trailing blade end, in an area extending from an intermediate position between the leading blade end and the trailing blade end to the trailing blade end.

Abstract: Blades (20a to 20c) of a propeller fan (10) have different circumferential pitches ?1, ?2, and ?3. The blades (20a to 20c) have different masses so that the center of gravity of the propeller fan (10) is positioned on a rotational center axis (11) of the propeller fan (10). Blade body portions (42c) of the blades (20a to 20c) have different thicknesses. In contrast, camber lines of the blades (20a to 20c) in blade cross section have the same shape, projections of the blades (20a to 20c) on a plane perpendicular to the rotational center axis (11) of the propeller fan (10) have the same shape, and leading edge portions (41a to 41c) of the blades (20a to 20c) have the same shape. As a result, a propeller fan (10) having reduced noise and vibrations can be achieved.

Abstract: In a blade of a propeller fan, a position on a chord line where the camber becomes maximum is set as a maximum camber position A, and a ratio of a distance d between a leading edge and the maximum camber position A to a chord length c is set as a maximum camber position ratio. The end portion on the hub side of the blade is set as a blade root, and the end portion on the outer circumferential side of the blade is set as a blade end. In the blade, the maximum camber position ratio monotonically increases in the direction from the reference blade cross section located between the blade root and the blade end toward the blade end and becomes maximum at the blade end. Thus, fan efficiency of the propeller fan is improved.

Abstract: In a motor vehicle having in an engine room a carbon canister for adsorbing a vapor from a fuel tank, there is provided a vapor diffusing device which comprises a front side channel member extending in the engine room from a front portion of the vehicle toward a passenger room of the same, a structure incorporated with a part of the channel member to define an enclosed chamber, a first arrangement for fluidly connecting the interior of the enclosed chamber with a purge air opening of the carbon canister, and a second arrangement for defining a vapor diffusing opening through which the interior of the enclosed chamber is exposed to the interior of the engine room.

Abstract: A jacking point structure for an automotive vehicle, includes a bracket fixed to the underside of a trunk compartment at a rear portion of the vehicle, and a hook fixed to the bracket. The bracket has a first wall extending horizontally and a second wall extending vertically. Also, the bracket has a channel portion at its center which functions as a jacking point preferably at the rear end of the first wall. The hook extends horizontally in the backward direction of the vehicle and does not project downwardly. It is preferable that the hook is formed in a U-shape and welded at its legs to the first wall in such a manner that the channel portion of the bracket is held between the legs of the hook.

Abstract: A spare-tire storage arrangement of an automotive vehicle, comprising a tire-storage pan portion forming part of the floor panel structure of the vehicle body and downwardly sunk from the upper face of the floor panel structure, the tire-storage pan portion having a bottom wall and a side wall and being formed with a concavity which is open upwardly and which is surrounded by the side wall, the tire-storage pan portion being internally sized to be suitable for having a regular-sized spare tire received on the inner surface of the side wall at least at a plurality of points of the outer perimeter of the tread portion of the tire; a receptacle member externally sized to fit the inner surface of the side wall of the tire-storage pan portion, the receptacle member having an upper face located above the upper face of the bottom wall of the tire-storage pan portion at a level equal to the difference between the depth of the concavity in the tire-storage pan portion and the width of a temporary-use spare tire.

Abstract: A panel reinforcement structure construction for attaching to and reinforcing a vehicle structural panel. An elongate channel member has two side sections and is secured at the elongate open section thereof to the vehicle structural panel. An arm is attached to each channel member side section, and each arm extends from the end of the channel member transversely to the elongate axis of the channel member. An attachment flange is attached to each channel member arm in a manner to also attach to the vehicle structural panel to reinforce the structural integrity thereof and resist the effect of shear forces acting transversely on the elongate channel member.

Abstract: A shock absorbing vehicle bumper for a vehicle with an openable rear lid, the shock absorbing portion of the bumper being mounted to the lower end of the rear lid with a front surface of the shock absorbing portion facing a surface of a cross member mounted to the vehicle such that collision forces are directly transmitted to the vehicle through the shock absorbing portion and the cross member.

Abstract: An automobile rear glass door has a substantially flat main body portion and is angled at each side thereof to have side portions which cooperate with adjacent outer surfaces of a vehicle body when the rear door is in the closed position to define the contour of the vehicle. A weatherstrip is disposed on the vehicle body outer surfaces so as to contact the main body portion of the door glass inboard of the transition portion between the door's side portions and the door's main body portion when the rear door is in the closed position, thereby providing a positive environmental seal therebetween and improving the fit between the rear door edge and the adjacent vehicle body section.