FIELD OF INVENTION
[001] The present invention relates to a single axis ceiling fan with blades in different planes. More particularly, the present invention relates to a single axis ceiling fan having a shaft with two motors and 6 blades in different planes i.e. 3 blades in each plane for higher air delivery.
BACKGROUND OF THE INVNTION
[002] Existing electric fans are either ceiling fans hung from roof or table/wall/pedestal/exhaust fans—all having a motor to turn blades for air throw.
[003] Ceiling fans have become an increasingly popular supplementary means of creating airflow within both commercial and residential buildings. Ceiling fans have the largest sweep and largest air flow for lowest power. Typical ceiling fans have a rotating motor with 3 blades which are suspended on a fan rod hung from the roof.
[004] Traditionally, air delivery is achieved by using different number of blades in the fan ranging anywhere between 3-6 blades. A high volume, low speed fan will generally have at least 6 blades arranged in the same plane and a lot of patents and publications can be found with 6 blades in the same plane. Efforts have also been made to improve the air flow at low speed by arranging the blades in various manners. Reference may be made to the following-
[005] Publication No. US6817830 (Bl) discloses a ceiling fan with multiple rotors, comprising a shaft unit, a rotation seat, a power transmission unit, and a fan mechanism. In operation, each of the two movable fans is both rotated on its own axis and rotated about the shaft unit, while the motor set

of the fan mechanism also drives the rotation disk to rotate, thereby rotating the fan blades simultaneously. Thus, the ceiling fan produces a three-dimensional air flow rate with rotation of 360 degrees, thereby efficiently providing a three-dimensional heat dissipation effect.
[006] Publication No. US8602725 (B2) discloses a configuration including outer-rotation motor portion including stator with a center through which fixed axis passes, and rotor pivotally supported capable of rotating around stator; a plurality of blade plates radially arranged on rotor; support base having fixed axis in a center thereof and located in a lower part of stator; angle changing unit provided on support base; and a plurality of stationary blade plates being detachably placed on stationary blade holders provided on angle changing unit. With the configuration in which an elevation/depression angle of stationary blade plates is adjustable by at least one stationary blade driving motor that drives angle changing unit.
[007] However, it may be clear from the above mentioned prior arts that even though the use of 6 blades is relatively common, the constructional features along with the complexity of the designs makes the ceiling fan quite expensive as well as the efficiency in terms of delivery of air at a low speed is less. It is also clear that not much effort has been done with blades in different plane for improving air delivery.
[008] Thus, the present invention provides a single axis ceiling fan for providing higher air delivery at low speed having 6 blades (pair of 3 blades) in different planes.
OBJECTS OF THE INVENTION
[009] The principal objective of the present invention is to provide a ceiling fan having a shaft with two motors and 6 blades in different planes i.e. 3 blades in each plane for higher air delivery.

[0010] Another object of the present invention is to a ceiling fan for higher air delivery at same speed as compare to conventional fan.
[0011] Still another object of the present invention is to provide aesthetically different ceiling fan.
SUMMARY OF THE INVENTION
[0012] In accordance with the said objectives, the present invention provides a ceiling fan having a configuration of a single shaft which comprises of two motors and 6 blades in different planes i.e. 3 blades in each plane for higher air delivery.
[0013] The present invention has a configuration which includes, 2 different shafts connected to each other in a single axis with the help of bush connector, each shaft comprises of electric motor assembly which further comprises of a top cover, a bottom cover, an electric rotor and an electrical stator. A set of 3 blades is further connected with each shaft such that the blades are in a single axis but different planes.
[0014] According to such configuration, the volume of air delivered at a speed increases as compared to conventional Fan.
BRIEF DESCRIPTIONS OF THE ACCOMPANYING DRAWINGS
[0015] The above brief description, as well as further objects, features and advantages, of the present invention can be fully appreciated by reference to the following detailed description. These features of the present invention will become more apparent upon reference to the drawings, wherein:

Figure 1 shows fan according to the present invention;
Figure 2 shows air delivery according to the present invention;
Figure 3 shows internal arrangement of the fan components.
Figure 4 represent the construction of the single axis ceiling fan according to the
present invention
Figure 5 represent the change in Air delivery from Conventional Fan to Fan-in -
Fan concept at standard test condition.
DETAIL DESCRIPTION OF THE INVENTION
[0016] The present invention will be described in detail below with reference to an embodiment as shown in the drawing.
[0017] Accordingly the present invention provides a fan, in which 6 nos. of blades are mounted on different plane of the Fan i.e. 3 blades in each plane with two stators and rotors mounted on a single shaft. The present invention results in higher air delivery and different aesthetic look for the consumers.
[0018] Referring to Figure 1, a single axis ceiling fan with blades in different planes is disclosed. Said fan has a single shaft with two motors in different plane. A set of 3 blades in each plane results in higher air delivery at a speed as compare to Air delivery of conventional fan on same speed. It is achieved by changing the shaft design and stator/rotor mounting process in manufacturing line.
[0019] Referring to the figure 2, the fan according to the present invention provides higher air delivery because of 2 pairs of 3 blades arranged in different planes and blade design with two stators and rotors mounted on a single shaft.

[0020] Figure 3 shows a new shaft (1) according to the present invention. The new shaft comprises of two parts and is of elongated length. An upper shaft (2), which is from existing fan, and a lower shaft (3) is designed as per the requirement of the present invention to have the increase in the length to accommodate two stators, rotors and blades in different planes and to make the manufacture process simpler. The said upper shaft and said lower shaft are connected to each other using bush connector (4). Said upper and lower shafts are connected so that the new shaft (1) is in a single axis in order to accommodate said rotors, stators and blades to manufacture the ceiling fan, having a single axis with blades in different (at least two) planes, as per the present invention. One pair each of top cover, bottom cover, stator and rotor are mounted on said upper shaft (2) and another pair of top cover, bottom cover, stator and rotor are mounted on said lower bottom (3) shaft.
[0021] Referring to the figure 4, the fan assembly has a down-rod (10);shaft (l);two electric motor assemblies (20, 21) including one pair of top cover (12, 13), two electrical stators (14, 15) and two rotors (16, 17); one pair of bottom cover (18, 19) and a bush connector (4). Top covers and bottom covers cover the motor assemblies. The ceiling fan motor and blade assembly is suspended from the ceiling by a rigid tube referred to as "down rod" (10). The down rod (10) is connected onto the motor shaft (11) with the help of screws (not shown in the Figure).Upper electric motor assembly (20)comprises of first Top cover (12), first Bottom cover (18), first Stator (14) and first Rotor (16) which are mounted on upper shaft (2). Bottom electric motor assembly comprises of second Top cover (13), second Bottom cover (19), second Stator (15) and second Rotor (17) which mounted on bottom shaft (3).
[0022] Said upper fan shaft (2) is connected to said lower fan shaft with the help of said bush connector (4) to make it single axial Fan according to the present invention. After this assembly, Blades are assembled to "Upper Fan Motor Assembly- Top Cover (12)" and then to "Lower Fan motor Assembly- Top

Cover (13)" to make the Single axial fan with Blades in different planes according to the present invention.
[0023] The air turbulence between blades is taken care by maintaining the optimized gap between blades and blade design and additional 2 motors. This unique and novel design of a single axial ceiling fan with blades in different planes results in better air delivery at a speed &makes the fan noiseless and turbulence less.
[0024] Numerous modifications and adaptations of the system of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the true spirit and scope of this invention.

WE CLAIM:
1. A single axis ceiling fan with blades in different plane comprising:
a down-rod (10); shaft (1); one pair of top cover (12, 13); two electric motor assemblies (20, 21) including two electrical stators (14, 15) and two rotors (16, 17); one pair of bottom cover (18, 19) and a bush connector (4) characterized in that two pairs of 3 blades are mounted on different plane of the fan each with one motor mounted on a single shaft.
2. The fan as claimed in claim 1 wherein said shaft (1) comprises of an upper shaft (2) and a lower shaft (3) wherein said upper shaft (2) and lower shaft (3) are connected to each other in a single axis using bush connector (4).
3. The fan as claimed in claim 1 wherein said fan assembly comprises of a upper electric motor assembly (20) and a lower electric motor assembly (21) wherein said upper motor electric assembly comprises of first top cover (12), first bottom cover (18), first stator (14) and first rotor (16) mounted on said upper shaft (2);and
Said lower electric motor assembly (21) comprises of second top cover (13), second bottom cover (19), second stator (15) and second rotor (17) mounted on said lower shaft (3).