WO2021149070A1

WO2021149070A1 - An apparatus for 360° revolving a fan

Info

Publication number: WO2021149070A1
Application number: PCT/IN2020/050867
Authority: WO
Inventors: Rohit Chunilal Kareliya
Original assignee: Rohit Chunilal Kareliya
Priority date: 2020-01-21
Filing date: 2020-10-09
Publication date: 2021-07-29
Also published as: CA3165389A1; AU2020424571A1; GB202212030D0

Abstract

An apparatus for 360° revolving a fan includes a housing(104); a plurality of bearings (102) fixed in the housing (104); an elongate shaft (101) passing through the bearings (102) whose one end is received in a revolution control assembly (50) and other end secured with a coupling means (115); the coupling means (115) also fixedly holds downrod (134) of a fan at an angle to the elongate shaft such that the axes of downrod (134) and shaft (101) don't cross each other, creating gyroscopic structure. Power to the fan is provided through sliprings (110). When fan blades spin around fan axis, due to precession the whole fan revolves 360°.

Description

Title:

An apparatus for 360° revolving a fan

Field of Invention:

The present invention relates to fan assemblies in general. In particular the present invention relates to but not limited to revolving a whole fan assembly 360° around an axis.

Background:

The terms fan, ceiling fan, exhaust fan, table fan, pedestal fan, blower are used interchangeably with the usual meaning referring to means for circulating air. In particular cases without compromising generality, the term "fan" will be used to describe the invention herein. The term air, breeze, wind are used interchangeably indicating circulation of air.

A fan and in particular a ceiling fan has become an essential item in every room of a household or an office. Function of a fan is to push air into its "catchment area" such that there is enough circulation of air in such area. Such circulation serves many objectives like infusing fresh air, removing stale air, reducing temperature, chasing away insects-mosquitoes-flies, providing breeze to people therein such that they feel comfortable, etc. These ceiling fans are normally installed at the center of the room. Such centrally located fan does not provide sufficient air circulation near the corners and walls of the room and people therein feel the heat, suffocation, un-comfort etc. Moreover, the ceiling fan that is generally fixed vertically downwards provides continuous and forceful flow of air underneath it, causing un-comfort to the people down there due to 'too much of air'. Conventionally, in order to direct the linear airflow produced by a fan into different directions, an oscillating mechanism has to be installed. In the state of art this is attempted broadly in two ways. One such approach is by having a rotating cover on the fan that has louver type slots which direct the air into different directions. But the louvers, slots and their hinges very quickly gather dust and such densely arranged slots also hinder in full air delivery. Hence the same is not very useful. Second approach is to provide a mechanism by which the entire rotating fan is revolved. Yet another approach is to provide multiple fan assemblies on a rotating structure. There had been attempts to provide solutions around these approaches, but most of them have been too clumsy, inefficient and impracticable that they are not being used commercially.

CN2446312A teaches an apparatus wherein on a central shaft and a rotating disc, two sets of ceiling fans are disposed. CN2637776 also teaches a multi-rotor ceiling fan structure which can be revolved. Here also disclosure is about some incremental improvement in a system of two fan assemblies rotating. CN2692386 teaches how speed of above described multi-fan assemblies can be controlled. However, a system of multi- fan assemblies revolving around a structure is so clumsy that it is of no practical use.

US Patent Publication 2008/0304969 discloses a built-in swing mechanism of a rotary fan. The mechanism includes a ball-and-socket support frame, arranged onto front wall of the main casing corresponding to the axle center of a drive motor and provided with a spherical supporting surface and a through-hole. A spherical abut seat fastened at a front end of the drive motor is provided with a spherical abut surface that couples with the spherical supporting surface. A punch hole is placed at the center of spherical abut surface for the penetration of the axle center. A crank linkage element is assembled between rear end of the drive motor and the rear wall of the main casing. The first end of the crank linkage element can be driven to enable the oscillation of the second end. The second end is assembled at a rotary pivot corresponding to the main casing. However, as is common with such apparatus, the gearbox, ball-and-socket mechanism, etc get worn out very quickly due to unbalanced weight distribution of the swing mechanism. And such assemblies jig or halt during oscillation reducing the operational efficiencies and life of the fan. Further US Patent Publication 2011/0064577 also discloses similar apparatus wherein a fan with concealed 360-degree oscillating mechanism includes a main housing; a pivot member vertically, pivotally and turnably mounted in the housing; a first driving motor having a forward first rotary shaft and horizontally, pivotally and turnably mounted in the pivot member; an oscillating mechanism assembled between the first driving motor and a rear end face of the main housing, and having a first end driving an opposing second end to rotate eccentrically; and a set of blades fixedly connected to the first rotary shaft to locate in front of the main housing. However, here too, due to plethora of cranks, gears and second motor etc, the entire system is too clumsy and inefficient and due to such limitations the same is neither practicable nor commercially viable. There are some other patents also that teach us how air can be sent to farther areas of a room. But most of them are around the broad theme of revolving multi-rotor fan assemblies. Since controlling and balancing a system of a revolving multi-rotor fan assembly is a clumsy and unpredictable task, these disclosures are mostly not in use. However, the need of such a system persists for the reasons as mentioned hereinabove. DISADVANTAGE OF PRIOR-ART

The above mentioned and other prior art fail to provide any viable apparatus that helps in efficiently circulating the air in entire area of a room. Also the prior-art fails to provide a system that would work without an additional motor for powering the revolution/oscillation mechanism thereof.

The prior art as known, has many fold disadvantages, including, but not limited to:

• Most of the existing methods fail to provide any viable solution for pushing air into remote corners of a room.

• Prior art is not able to provide any apparatus that is sturdy enough to be installed such that it works long enough.

• No prior art provides an apparatus wherein revolution of (a) rotating fan(s) could be achieved without using an extra motor or external power to drive such revolution.

• Apparatuses of prior-art for revolving fans 360° have lot of gears and moving parts. Hence such systems are clumsy and unviable.

• Apparatuses of prior-art for revolving fans 360° fix such fans at distal ends of a rod or disk, which in turn is rotated. Due to various extraneous factors like voltage fluctuations, speed variations of fans, ambient air waves, etc, such systems are not stable. Hence, they being undependable and unreliable, they are not in use.

OBJECTS of INVENTION: The main object of present invention is to provide an apparatus for smoothly revolving a ceiling fan 360° around an axis. Further object of present invention is to provide an apparatus for revolving a ceiling fan 360° that does not use a motor or any other external source of power for such revolution.

Further object of present invention is to provide for a sturdy mechanism for revolution control of the revolving fan of present invention.

Yet another object of present invention is to provide a sturdy blade assembly suitably adapted for the apparatus of present invention.

Yet further object of present invention is to provide for an arrangement for air-freshener/mosquito-repellent dispensation from a fan. Additional objects and advantages of present invention will be learned from the detailed description of a preferred embodiment of the invention which follows and the accompanying drawings, or may be learnt from practice of the invention.

Summary of Invention: This summary of invention is provided to introduce a selection of concepts in a simplified format that are further described in the detailed description of the present complete specification. This summary is not intended to identify the key or essential inventive concepts of the invention, nor is it intended for determining the scope of invention. An aspect of some of the embodiments of the invention relates to a substantially reliable apparatus for revolving a fan assembly 360° around an axis. Optionally such fan assembly is a ceiling fan and it is revolved around a vertical axis. Alternatively, the fan assembly is a table fan or a pedestal fan, wherein it is fixed on a stable stand and is revolved around this stand. An aspect of some of the embodiments of the invention relates to a revolution control assembly that controls the revolutions of a fan assembly in accordance with present invention. An aspect of the some of the embodiments of the invention relates to a coupling means that securely locks and engages the shaft of the fan revolution apparatus in accordance with present invention and downrod of a fan assembly. To achieve the above and other objectives, the apparatus for 360° revolving a fan, according to a preferred embodiment of the present invention includes a housing, a plurality of bearings located in and securely fixed in the housing, an elongate shaft passing through the plurality of bearings, a revolution control assembly connected to one end of the shaft, a coupling means fixed with second end of the shaft, and a fan assembly whose downrod is also fixed with the coupling means. To allow the power supply to the fan motor, a slip-ring is provided that connects with carbon-brushes fixed with the housing body.

In an embodiment of the present invention, the downrod of a fan assembly is fixed onto the coupling means such that it forms an angle of between 100° to 179° with the shaft of present appratus. In a preferred embodiment, this downrod is engaged at an angle of 130° with the shaft of the apparatus assembly. Optionally this downrod is engaged at an angle of 145° with the shaft of the apparatus assembly. In an embodiment of the present invention, as the fan assembly attached to the apparatus of present invention is supplied electric power, its blades start rotating like any other fan. Since the blades are not facing downward the fan blades, fan downrod and the apparatus shaft form a typical gyroscopic structure. The rotating blades of the fan generate air streams that develop air currents which in turn exert torque on to the gyroscopic structure, trying to push or move it around the axis of vertical shaft of the apparatus. As per the principle of precession, the orientation of the rotational axis of the fan assembly (a rotating body) is changed relative to the axis (shaft of the present apparatus). The direction in which this change/torque is applied to the fan body is typically in a direction opposite to the direction of the rotating body. Hence as per the principle of precession in gyroscopic structure, if the fan blades are rotating clockwise, the torque causing revolution of fan assembly forces it to revolve in opposite direction that is anti-clockwise. Similarly, if the fan blades are rotating anti-clockwise, the torque causing revolution of fan assembly forces it to revolve in opposite direction that is clockwise.

In order that the principle of precession is effectively harnessed, in the preferred embodiment of the present invention, in the coupling means, the shaft of present apparatus and downrod of a fan assembly are securely fixed such that their axes don’t cross each other.

The revolution control assembly comprises of a clutch holder with an axially threaded hole to securely receive the shaft of the present apparatus and it also has a plurality of axially extending eccentric cylindrical holes (150) which receive a plurality of spring and piston rod pairs in each such hole. The eccentric (cylindrical) holes (150) have reduced diameters at outer end such that the springs don't move out or escape when pressure is applied by piston. The piston rods are connected to a sturdy disk like circular base, the piston rods and the disk like circular base together form the piston. This piston has a plurality of grooves on the opposite surface for securely fixing a liner plate made of abrasive material with the help of an appropriate gluing chemical. Both the piston base and liner plate have a central holes through which they are accommodated around the shaft beneath the clutch holder. However, they are not secured with the shaft and are free to rotate relative to the shaft. Further, in accordance with a preferred embodiment of present invention, beneath the liner plate is a clutch plate of similar shape and similarly freely accommodated around the shaft. However, this clutch plate is securely fixed to the housing body from inside and hence it is not free to move.

The pressure between and amongst various component of the revolution control assembly are preset for a desired revolution speed of the fan assembly. Now whenever, due to any extraneous reason like voltage fluctuation or change in ambient air flow, etc, as the fan assembly tries to revolve faster or slower, the revolution control assembly ensures that the revolution speed comes back to the preset levels. The revolutions speed can be reset/re-adjusted by ensuring appropriate distance between the line plate and clutch plate of the revolution control assembly.

Optionally in an exemplary embodiment of the invention, a sturdy fan-blade structure is provided that has an outer ring holding the ends of blades. The revolving fan assembly exerts uneven forces on various parts of blades that change in quick succession. This quickly changing force exerted on the fan blades causes them to flutter. The outer ring around the fan blades holds the blades securely such that they don't flutter.

Brief Description of Figures

Non-limiting examples of embodiments of the present invention are described below with reference to figures attached hereto, which are listed following this paragraph. In the figures, identical structures, elements or parts that appear in more than one figure are generally labeled with a same symbol in all the figures in which they appear. Dimensions of components and features shown in the figures are chosen for convenience and clarity of presentation and are not necessarily shown to scale. The structure and the technical means adopted by the present invention to achieve the above and other objects can bet be understood by refereeing to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:

Fig 1 is a perspective view of an apparatus for 360° revolving a fan in accordance with an exemplary embodiment of the present invention.

Fig 2 is an enlarged sectional view of the shaft of apparatus an apparatus for 360° revolving a fan in accordance with an exemplary embodiment of the present invention.

Fig 3 is an enlarged view of the arrangement of bearings and slip ring around the shaft in accordance with an exemplary embodiment of the present invention.

Fig 4 is an enlarged sectional view of revolution control assembly that controls the revolutions of the fan assemblies, in accordance with an exemplary embodiment of the present invention. Fig 5 is an enlarged partial view sectional view of the clutch holder in revolution control assembly showing how springs are entrapped from escape under pressure, in accordance with an exemplary embodiment of the present invention.

Fig 6 is exploded view of the apparatus of present disclosure.

Detailed Description of Embodiments of the Invention:

For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended. Such alterations and further modifications in the illustrated system and/or apparatus and such further applications of the principles of the inventions illustrated herein being contemplated as would normally occur to one skilled in the art to which the invention relates are to be construed as forming part of the present invention and disclosure. It will be understood by those skilled in the art that the foregoing general description and the following detailed description are explanatory of the invention and are not intended to be restrictive thereof.

Reference throughout the present specification to "an aspect", "another aspect" or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrase, "in an embodiment" and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless expressly stated otherwise or the context demands otherwise. It will be further understood that the terms "includes", "comprises", "including" and/or "comprising" when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or an intervening elements may be present. Furthermore, the term “and/or” includes any and all combinations and arrangements of one or more of the associated listed items. The terms shaft, elongate shaft, step- shaft are interchangeably used in the following detailed description and they are not meant to limit the interpretation.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Any headings provided herein are for convenience only and do not necessarily affect the scope or meaning of the claimed invention. Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

The detailed description of the apparatus for 360° revolving a fan and object of the present invention will be made in accordance with the identification of components that form the basis of the figures described above.

After observing all above problems in the prior art, the invention of an elaborate yet sturdy apparatus for 360° revolving a fan assembly is developed and the same is disclosed in the present detailed description which is sturdy, robust, reliable, simple and less complex than available apparatuses aiming to provide the same function.

The apparatus for 360° revolving a fan assembly in accordance with a preferred embodiment of the present disclosure is shown in FIGs 1 & 2, the bearing-shaft arrangement is shown in Fig 3, the details of revolution control assembly are shown in Fig 4 & 5 and an exploded view of parts of the present apparatus are shown in Fig 6. In the following detailed description, please refer to appropriate figures.

An aspect of some of the embodiments of the invention relates to an apparatus for substantially reliably revolving a fan assembly 360° around an axis. Optionally such fan assembly is a ceiling fan and it is revolved around a vertical axis. Alternatively, the fan assembly is a table fan or a pedestal fan, wherein it is fixed on a stable stand and is revolved around this stand. An aspect of some of the embodiments of the invention relates to the arrangement of step shaft (101), a plurality of bearings (102) in the housing (104) of the apparatus of present disclosure.

An aspect of the some of the embodiments of the invention relates to a revolution control assembly (50) that controls the revolutions of a fan assembly in accordance with present invention.

An aspect of the some of the embodiments of the invention relates to a coupling means (115) that securely locks and engages the step shaft (101) in accordance with present invention and downrod of a fan assembly. An another aspect of the some of the embodiments of the invention relates to a fan blade structure that comprises of a blade ring (126) that connects the ends of blades (119) of a fan making it sturdy and capable of withstanding uneven forces due to revolution of the fan assembly in accordance with the present disclosure. A perspective view of a fan assembly attached to the apparatus of present invention (100) is shown in Fig 1.

To achieve the above and other objectives, the apparatus for 360° revolving a fan according to a preferred embodiment of the present invention includes a housing (104), a plurality of bearings (102) located in the housing (104), an elongate-step-shaft (101) passing through the plurality of bearings

(102), a revolution control assembly (50) securely receiving one distal end of the step shaft (101), a coupling means (115) securely receiving second distsal end of the step shaft (101), and a fan assembly whose downrod (134) is also fixed with the coupling means (115). To allow the power supply to the fan motor a slip-ring (110) is provided that connects with carbon-brushes (112) fixed in the housing (104). Optionally the slip-ring is a three-point slip-ring. In the preferred embodiment of the present invention, the downrod (134) of a fan assembly is fixed onto the coupling means (115) such that it forms an angle of between 100° to 179°. Optionally this downrod (134) is engaged at an angle of 130° with the step shaft (101) of the apparatus assembly. Optionally this downrod (134) is engaged at an angle of 145° with the step shaft (101) of the apparatus assembly. The coupling means (115) is a molded structure made of rigid PVC. Optionally the coupling means (115) can be made of any other suitable material.

In an embodiment of the invention, as the fan assembly attached to the apparatus of present invention is supplied electric power, its blades (119) start rotating like any other fan. Since the blades are not disposed vertically downward, the fan blades (119), fan downrod (134) and the apparatus step- shaft (101) form a typical gyroscopic structure. The rotating blades (119) of the fan generate air streams that develop air currents which in turn exert torque on to the gyroscopic structure trying push or move it around the step-shaft (101) of the apparatus of the present disclosure. As per the principle of precession, as the fan blades (119) rotate, the orientation of the rotational axis of the fan assembly (a rotating body) is changed relative to the axis of the step-shaft (101) of the present apparatus. The direction in which this change/torque is applied to the fan body is typically in a direction opposite to the direction to the rotating body (the fan blades (119) in this case). Hence as per the principle of precession in gyroscopic structure, if the fan blades (119) are rotating clockwise, the torque causing revolution of fan assembly forces it to revolve in opposite direction that is anti-clockwise. In order that the principle of precession is effectively harnessed, in the coupling means (115) of the preferred embodiment of the present invention, the step-shaft (101) of present apparatus and downrod (134) of a fan assembly are securely fixed such that their axes don’t cross each other. Optionally, in the preferred embodiment, minimum distance between these two axes is more than sum of radii of both of these shafts (i.e. the downrod (134) and the step-shaft (101) of present disclosure). Once the fan assembly starts revolving around the step-shaft (101), it is essential to manage and control the speed of such revolutions. The speed of revolution of a gyroscopic structure depends upon the engineering parameters of the components of the gyroscope. For examples, such engineering parameters are length of the downrod, radius of rotating structure (the Fan Blades), angle of both the axes, etc. These can be appropriately designed to achieve required RPM of revolutions. Flowever, the revolution speed (RPM) of gyroscopic structure of the present disclosure, like any other gyroscopic structure, also depends upon extraneous factors like size of the room, height at which the fan is installed in the room, inflow of air-stream in the room from outside, etc. Moreover, due to such external factors the structure might tend to increase the revolution speed in a runaway manner and ultimately collapse. Similarly, due to such external factors the structure might tend to decrease the revolution speed and ultimately halt the revolutions. In short, in spite of meticulous engineering design, in order that the present disclosure gives stable revolutions in a desired range, an assembly that controls the revolutions of the assembly is required. In a preferred embodiment of the present invention, such a revolution control assembly (50) is provided.

Fig 4 shows sectional view of the revolution control assembly (50). The revolution control assembly (50) in accordance with the present disclosure comprises of a clutch holder (109) with an axially extending threaded central hole to securely receive one distal end of the step-shaft (101) of the present apparatus and it also has a plurality of axially extending eccentric cylindrical holes (150). Each such axially extending eccentric hole (150) receives a pairs of spring (108) and rod of piston (107) in each such hole. These eccentric cylindrical holes (150) have reduced diameters at outer end (133) such that the springs (108) don't fly off when pressure is applied by the piston (107). The rods of piston (107) are connected to a sturdy disk like circular base. The rods of piston (107) and the disk like circular base of piston (107) together form a one-piece piston (107). This base of piston (107) has a plurality of grooves on the opposite surface for securely fixing a liner plate (106) on it with the help of an appropriate gluing chemical. Both the base of piston (107) and liner plate (106) has central holes through which they are accommodated around the step-shaft (101) beneath the clutch holder (109). However, they are not secured with the step-shaft (101) and are free to rotate relative to the step- shaft (101).

Further, in accordance with a preferred embodiment of present invention, beneath the liner plate (106) is a clutch plate (105) of similar shape and similarly freely accommodated around the step-shaft (101). However, this clutch plate (105) is securely fixed to the housing (104) body from inside through a clutch plate locking element on the housing body (135) and hence it is not free to move. In the preferred embodiment, the clutch holder (109) is made of rigid PVC material of sufficient strength to withstand the torque generated in the apparatus. Optionally it can be made of any other suitable material, serving the purpose. In the preferred embodiment the base of piston (107) and rods of piston (107) are made of same material and it is typically soft PVC material. Optionally it can be made of any other suitable material, serving the purpose. In the preferred embodiment the liner plate (106) is made of suitable ceramic material that can exert required friction on the clutch plate (105). Optionally it can be made of Teflon material. Optionally it can be made of any other suitable material, serving the purpose. In the preferred embodiment, the clutch plate (105) is made of MS Steel. Optionally it can be made of any other suitable material, serving the purpose.

The pressure between and amongst various component of the revolution control assembly (50) are preset for a desired revolution speed. For the same a rigid pipe is inserted from a lateral hole (125) in the housing (104) which passes through the clutch holder (109). This inserted rod locks the clutch holder (109) relative to the housing (104) body. Now the step-shaft (101) is rotated by manually turning the coupling means (115) such that a desired distance between the clutch plate (105) and liner plate (106) is achieved. At a particular distance between clutch plate (105) and liner plate (106), revolution speed of the shaft (101) is fixed at certain RPM. Now whenever, due to any extraneous reason like voltage fluctuation or change in ambient air flow, etc, the fan assembly tries to revolve faster or slower, the revolution speed can be re-adjusted to desired RPM by the above mentioned procedure.

As shown in Fig 3 , the bearings (102) are securely fixed in the housing (104). In order that bearings (102) don't wear out quickly nominal play has to be provided. Moreover, an arrangement is provided such that the bearings (102) don't slip in relation to the housing (104). Additionally the housing (104) needs to be protected from sudden jerks. These objectives are achieved by securely fixing the bearings (102) in the housing (104) through bearing caps (103). These bearing caps (103) are made of rigid rubber and have gear like structure that has rectangular teeth. These teeth securely fit into corresponding structure in the housing (104). Such use of bearing caps (103) serves multiple purposes. Firstly it cushions out sudden jerks being applied onto the housing (104). In addition, it provides some play to the bearings (102) such that they don't not get worn out quickly. The bearings locations along the step-shaft (101) are secured by steps (131) of the shaft (101).

The fan assembly needs to be supplied with power. Typically three points are required: one from capacitor, one from line and one from neutral. The same are provided through a three-point slip-ring (110). As shown in the exploded view of Fig 6, the slip ring (110) gets power from a plurality of carbon brushes (112) fixed on body. The carbon brushes (112) are suitably mounted on the body with necessary brush cap (114), Body cap (113) and a brush holder (111). The capacitor of the fan can be put hidden in the apparatus of the present disclosure or it also can also be placed in the switch board on the wall that has fan on-off switch. Such placing of the capacitor in the switch board will serve two purposes. Firstly, it won't require installing capacitor up there in the apparatus of present disclosure Secondly, as some times the capacitors need replacements, such replacements become easier if it is put in the easily accessible switchboard.

The revolving fan assembly exerts uneven forces on various parts of blades (119). And due to revolution of the entire fan assembly these uneven forces change both in magnitude and direction in quick succession. This quickly changing force exerted on the fan blades (119) causes them to flutter. To take care of this problem, in a preferred embodiment of the invention, a sturdy blade structure is provided that has a blade ring (126) holding the ends of blades (119). The blade ring (126) around the fan blades (119) holds the blades securely such that they don’t flutter.. Fig 1 shows a perspective view (100) of a fan assembly fitted with the apparatus of present disclosure. In a preferred embodiment the apparatus is adapted for revolving a ceiling fan 360° around a vertical axis. As shown in Fig -1, the apparatus and fan assembly can be mounted on any suitable ceiling surface with a mounting slab (121), nuts (122) and bolts (116).

The apparatus of the present disclosure revolves a fan assembly 360° around an axis. Due to such revolution the air stream is distributed around the room and no one area gets continuous air-stream. Hence no one feels over exposed to high air-flow. Hence, optionally in a fan system using apparatus of present disclosure may not require fan speed regulator. That is the fan blades can be allowed to rotate at maximum motor RPM capacity without causing discomfort to people in the room. The above detailed description has explained the principal and working of a preferred embodiment of the disclosure for a ceiling fan. However, there are many other applications where the principal and disclosure of present disclosure are applicable. One such application is a table fan which can be revolved around a vertical axis for delivering fresh air 360° around a room A person skilled in the art would be

Benefits, other advantages, and solutions to problems have been described above regard to specific embodiments. However, the benefits, advantages, solutions to problems, and any component(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature or component of any or all the claims.

The present invention has been described using detailed descriptions of embodiments thereof that are provided by way of example and are not intended to limit the scope of the invention. The described embodiments comprise different features, not all of which are required in all embodiments of the invention. Some embodiments of the present invention utilize only some of the features or possible combinations of the features. Variations of embodiments of the present invention that are described and embodiments of the present invention comprising different combinations of features noted in the described embodiments will occur to persons of the art. The scope of the invention is limited only by the following claims.

Advantages of the Invention:

An apparatus for 360° revolving a fan is provided in the present invention. The benefits and advantages of the present invention are many fold. The present disclosure provides for a robust and sturdy apparatus for revolving a fan 360° around an axis. The apparatus does not use any motor or power for such revolution. A ceiling fan attached to present apparatus provides fresh air in every corner of the room so that persons sitting near the walls also feel comfortable. The persons sitting straight beneath the fan do not feel excessive air. The areas near comers of the room are clean of the dust and insect, thus providing better sanitation. The apparatus does not use any power for such revolution. The fan using this apparatus does not require conventional fan speed regulator found in most fans.

Claims

Claims: I claim :

1. An apparatus for 360° revolving a fan assembly, the apparatus comprising: a housing (104) fixable onto a ceiling surface; a plurality of bearings (102) securely fixed inside the housing (104); an elongate shaft (101) operatively passing through the said plurality of bearings and having plurality of threads at its distal ends; the said plurality of threads on first distal end of the shaft (101) fixedly engage a revolution control assembly (50); the said plurality of threads on the second distal end of the shaft (101) fixedly engage in a first coupling hole in a coupling means (115) with corresponding threads inside the said first coupling hole; the said coupling means (115) securely and fixedly engages downrod (134) of a fan assembly at an appropriate angle with respect to the said shaft (101) in a second coupling hole having suitable threads within it; and a multi -point slip-ring (110) securely fixed around the shaft (101) and operatively connected to a plurality of carbon brushes (112) for transferring power to the said fan assembly; wherein the said revolution control assembly (50) operatively controls speed of

360° revolution of the said fan assembly.

2. The apparatus as claimed in claim 1 , wherein, the said elongate shaft (101) is a step shaft with steps at appropriate spots (131 ) to secure locations of the plurality of bearings (102); the said plurality of bearings (102) are securely fixed inside the housing (104) through grooved bearing caps (103) to securely fasten with corresponding receiving elements inside of the housing ( 104); the said elongate shaft (101) is made of MS Steel; the said coupling means (115) is made of Rigid PVC material.

3. The revolution control assembly (50) of the apparatus as claimed in claim 1 further comprising; a clutch holder (109) having a threaded hole though its axis which receives and fixedly secures the first distal end of the said shaft (101) with the clutch holder (109); the said clutch holder (109) further having a plurality of axially extending eccentric cylindrical holes(150); a piston (107) with a plurality of piston rods firmly connected with a base, wherein the said plurality of rods slip into the said plurality of eccentric cylindrical holes (150) of the said clutch holder (109); a plurality of springs (108) in which the said piston rods are accommodated within the said plurality of cylindrical holes; a liner plate (106) fixedly secured beneath the said base of the said piston (107) and freely disposed around the said shaft (101) through a hole; and beneath the said liner plate (106), a clutch plate (105) securely fixed with the said housing (104) and freely disposed around the said shaft (101) through a hole.

4. The revolution control of assembly (50) as claimed in claim 3, wherein; the plurality of springs (108) are helical compression springs; the clutch holder (109) is made of rigid PVC material; the said piston (107) is made of semi-rigid PVC material; the said liner plate (106) is made of suitable abrasive material to exert necessary friction onto the said clutch plate (105 ); the said base of the piston (107 ) has a plurality of grooves on the surface opposing to the rods and the said liner plate (106) has on its piston side surface, corresponding plurality of humps which are received in said grooves thereby securely fastening the base of piston (107 ) and Liner Plate (106) with the help of a gluing means; the plurality of axially extending eccentric cylindrical holes (150) have reduced diameter (133) on their open side such that the plurality of springs (108) disposed in these cylindrical holes are stopped from flying-off under pressure, thereby creating and maintaining necessary pressure and torque in the revolution control of assembly (50); the said clutch holder (109) has a plurality of holes (125) normal to its axis in which an alien key can be inserted for making the clutch holder (109) temporarily immovable in relation to the housing such that the pressure and distance between liner plate (106) and clutch plate (105) can be adjusted by manually rotating the shaft (101) by turning the coupling means (115)

5. The coupling means (115) as claimed in claim 1 comprising; a molded structure with the first coupling hole with threads to fixedly and securely engage the corresponding threads of the second distal end of the shaft (101); and the second coupling hole with threads to fixedly and securely engage the downrod of the fan assembly and whose axis is at a suitable angle to the shaft (101) axis for optimum air circulation; such that both the coupling holes are arranged in the coupling means (115) such that their axes don’t cross each other.