Abstract: The present invention relates to novel fan blade of a ceiling fan, wherein whole or partial perimeter of the blades was designed to project outwardly, for example, the cross section of the outwardly perimeter of the fan blade can be presented in a shape of circular arc, oval, taper with circular arc, obliquity with circular arc, truncated taper, truncated oblique or taper with circular arc in which two sides of the projecting base have a raised bench. A comparison test showed that, the rotational speed and air volume of the novel fan blade according to the present invention is 15-24% and 5-10% greater than those of the traditional fan blades respectively, therefore resulting in saving of materials and energy.

Abstract: The present utility model relates to an improved mounting mechanism for ceiling fan outer casing. The ceiling fan outer casing is fixed on the support of the motor through mounting members, the mounting members comprising a pair of convex fixing members and a pair of concave fixing members corresponding to and matched in use with said convex fixing members, on each of said convex fixing members is provided a pair of protruding elements transversely spaced and arranged in parallel, the upper end of said two protruding elements is each provided at one outward side with a hook respectively, on each of said concave fixing members is provided a receiving groove which has one end opening and is inverted “Y” in shape receiving said convex fixing members, the two opposite sides of one end of said receiving groove are provided respectively with recessed portions matched with said hooks.

Abstract: The present utility model relates to an improved mounting mechanism for ceiling fan outer casing. The ceiling fan outer casing is fixed on the support of the motor through mounting members, the mounting members comprising a pair of convex fixing members and a pair of concave fixing members corresponding to and matched in use with said convex fixing members, on each of said convex fixing members is provided a pair of protruding elements transversely spaced and arranged in parallel, the upper end of said two protruding elements is each provided at one outward side with a hook respectively, on each of said concave fixing members is provided a receiving groove which has one end opening and is inverted “Y” in shape receiving said convex fixing members, the two opposite sides of one end of said receiving groove are provided respectively with recessed portions matched with said hooks.

Abstract: A bagless canister vacuum cleaner having a chasse, an air blower and a dust extraction and collection unit is provided. The dust extraction and collection unit has an easily removable inlet chamber and an easily removable outlet chamber. The inlet chamber is substantially cylindrical, and the outlet chamber is disposed concentrically within the upper portion of the inlet chamber. Duct work within the chasse conducts air from the air inlet and into the inlet chamber in tangential fashion, such that air swirls about the inside walls of the inlet chamber. Air within the inlet chamber is then allowed to escape from the inlet chamber into the outlet chamber via a plurality of small holes disposed in the side walls of the outlet chamber. Air within the outlet chamber is exhausted to the blower via a top wall opening in the outlet chamber.

Abstract: A bagless vacuum cleaner having a chasse, an air blower and a dust extraction and collection unit is provided. The dust extraction and collection unit has an easily removable inlet chamber and an easily removable outlet chamber. The inlet chamber is substantially cylindrical, and the outlet chamber is disposed concentrically within the upper portion of the inlet chamber. Duct work within the chasse conducts air from the base of the chasse and into the inlet chamber in tangential fashion, such that air swirls about the inside walls of the inlet chamber. Air within the inlet chamber is then allowed to escape from the inlet chamber into the outlet chamber via a plurality of small holes disposed in the side walls of the outlet chamber. Air within the outlet chamber is exhausted to the blower via a top wall opening in the outlet chamber.

Abstract: A fan assembly includes a circular first array of first fan blades; a first primary ring member supportively connecting inner extremities of the first blades about a fan axis, respective end extremities of at least a majority of the first blades defining inside and outside diameters of the array, the first blades being oriented for producing a primary axial fluid flow between the inside and outside diameters in response to rotation of the first ring member, the first ring member extending between the inside and outside diameters. A second primary ring member connects outer extremities of the first blades, the first blades in combination with the first ring member defining a generally circular opening about the fan axis.

Abstract: A switch unit for a ceiling fan contains electrical wiring which connects the switch gear to the motor and the electrical power supply. The switch unit is readily detachable from the motor housing due to the respective unitary electrical connectors which connect the wiring at that point. The housing for the switch unit contains ventilating apertures to allow the flow of cooling air through the unit.