Claims:WE CLAIM,
1. A ceiling fan assembly (81) with multiple extendable telescopic downrods, for lowering and/or lifting up the high ceiling fans to an accessible workable height level that may be reached from the floor without using a ladder or any equipment, comprising of :
a motor housed within the motor housing (82);
a plurality of brackets (83), attached to the rotor of the ceiling fan motor;
a plurality of blades (84), attached to the said plurality of brackets by bolts;
atleast an extendable telescopic downrod assembly (85) for supporting the motor housing (8) from ceiling (86), wherein said extendable telescopic downrod assembly (85) is connected to ceiling (86) through atleast a bracket and a ball-joint member (87);
a top canopy (88) for housing the Bracket, wherein said canopy (88) is provided with an opening in the bottom for passage of extendable telescopic downrod assembly (85);
wherein said extendable telescopic downrod assembly (85) includes a plurality of extendable telescopic downrods (89a,89b,89c) having different diameters which can be extended to lower the ceiling fan to an accessible working height, wherein said extendable telescopic downrod assembly in a collapsed or contracted state said plurality of extendable telescopic downrods (89a,89b,89c) having different diameters can slide into one over the other and position the ceiling fan (81) in its original height from the ceiling (86) for its operation.

2. The ceiling fan assembly (81) with multiple extendable telescopic downrods, as claimed in claim 1, wherein said extendable telescopic downrod assembly (85) having plurality of extendable telescopic downrods (89a,89b,89c) with different diameters includes a progressively decreasing diameters from the upper end to the bottom end of the downrod assembly enabling the plurality of downrods (89a,89b,89c) to slide into one over the other.

3. The ceiling fan assembly (81) with multiple extendable telescopic downrods, as claimed in claim 1, wherein said downrod at the upper most end (89a) of the said plurality of downrods is provided with the largest diameter.

4. The ceiling fan assembly (81) with multiple extendable telescopic downrods, as claimed in claim 1, wherein said downrod at the lower most end (89c) of the said plurality of downrods is provided with the smallest diameter.

5. The ceiling fan assembly (81) with multiple extendable telescopic downrods, as claimed in claim 1, wherein said downrod at the upper most end (89a) of the said plurality of downrods is provided with a kidney slot (94).

6. The ceiling fan assembly (81) with multiple extendable telescopic downrods, as claimed in claim 1, wherein said downrod at the lower most end (89c) of the said plurality of downrods is provided with a cross dowel (93) for lifting ceiling fan up or lowering the ceiling fan down.

7. The ceiling fan assembly (81) with multiple extendable telescopic downrods, as claimed in claim 1, wherein said downrod (89d) positioned below the lower most downrod of the said plurality of downrods is provided with a slot (96) for fixing the ceiling fan.

8. The ceiling fan assembly (81) with multiple extendable telescopic downrods, as claimed in claim 1, wherein said plurality of downrods (89b) positioned below the upper most downrod and above the lower most downrod are provided with a dowel pin guide slot (95).

9. The ceiling fan assembly (81) with multiple extendable telescopic downrods, as claimed in claim 1, wherein said ceiling fan assembly with extendable telescopic downrods further comprises of a handle (90) specifically designed to lower or lift the ceiling fan by a person (91) operating from the floor (92).

10. The ceiling fan assembly (81) with multiple extendable telescopic downrods, as claimed in claim 1 and claim 9, wherein said handle (90) is operated to lower the ceiling fan (81) by lifting the cross dowel (93) of the lower most downrod (89c) slightly from the kidney slot (94) of the upper most downrod (89a) and making the cross dowel (93) of the lower most downrod (89c) to slide into the guide slot (95) provided in the plurality of downrods (89b) to bring down the ceiling fan (81) from the high ceiling (86) position to an accessible working height from the floor.

11. The ceiling fan assembly (81) with multiple extendable telescopic downrods, as claimed in claim 1 and claim 9, wherein said handle (90) is operated to lift up the ceiling fan (81) to the original ceiling (86) height by positioning the handle (90) below the cross dowel (93) of the lower most downrod (89c), pushing up the lower most downrod over the said plurality of downrods (89a,89b) making the said plurality of downrods having different diameter to collapse or contract and thereby reaching the upper most position, wherein in the said upper most position the lower most downrod (89c) having the cross dowel pin (93) is rotated to position the cross dowel pin (93) in the kidney slot (94) of the upper most down rod (89a) thereby positioning the ceiling fan (81) in its original ceiling (86) height for its operation.

12. The ceiling fan assembly with multiple extendable telescopic downrods, as claimed in claim 1, wherein said extendable telescopic down rod assembly (85) is operated via air shock mechanism.

13. The ceiling fan assembly with multiple extendable telescopic downrods, as claimed in claim 1, wherein said extendable telescopic down rod assembly (85) is operated via electric actuated mechanism.

14. A method of operation of the ceiling fan assembly (81) with multiple extendable telescopic down rods, for lowering and/or lifting up the high ceiling fans to an accessible workable height level that can be reached from the floor without using a ladder or any equipment, comprises steps of :
a) Ceiling fan (81) positioned in the high ceiling (86) is provided with the extendable telescopic downrod assembly (85), wherein said extendable telescopic downrod assembly (85) includes a plurality of extendable telescopic downrods (89a,89b,89c) having different diameters, which are progressively decreasing diameters from the upper end to the bottom end of the downrod assembly enabling the plurality of downrods to slide into one over the other in a collapsed or contracted state;
b) locking the cross dowel (93) of the bottom most downrod (89c) with the kidney slot (94) of the upper most downrod (89a) by using the handle (90), wherein said locking position the ceiling fan (81) in the original ceiling (86) height;
c) lifting the cross dowel (93) of the lower most downrod (89c) slightly from the kidney slot (94) of the upper most downrod (89a) using the said handle;
d) sliding the cross dowel (93) of the lower most downrod (89c) into the guide slot (95) of the plurality of downrods (89b);
e) lowering the ceiling fan (81) from the high ceiling (86) position to an accessible working height from the floor (92);
f) performing cleaning and/or other maintenance service on the ceiling fan;
g) lifting up the ceiling fan (81) by positioning the handle (90) below the cross dowel (93) of the lower most downrod (89c);
h) pushing up the lower most downrod (89c) over the said plurality of downrods (89b,89a) making the said plurality of downrods with different diameters to collapse or contract;
i) leading the lower most downrod (89c) to the upper most position to the original ceiling height;
j) rotating the lower most downrod (89c) having the cross dowel pin (93) to position the cross dowel pin with the kidney slot (94) of the upper most down rod (89a);
k) locking the cross dowel (93) of the bottom most downrod (89c) with the kidney slot (94) of the upper most downrod (89a) by using the handle (90); and
l) Positioning the ceiling fan (81) in its original ceiling (86) height.
, Description:Field of Invention
The present invention relates to the field of home appliances, in particular relates to electric ceiling fans, and more specifically to ceiling fans with multiple telescopic extendable downrods which enables easy elevation and lowering of ceiling fan for easy cleaning, maintenance and repair.
Background of the Invention
In today's modern homes and businesses, high ceilings have become an essential part of life. Ceiling fans are commonly used for facilitating air movement within rooms and to provide breeze. It is simple equipment with a motor and a plurality of blades which are generally used to generate airflow within a space or area and are often used for cooling or temperature regulation within the specified space. They have become increasingly popular and are used in industrial, commercial and residential environments to circulate air and to maintain proper temperature regulation. This is commonly accomplished with the use of high volume, low speed fans.
A typical ceiling fan assembly includes a down rod suspended from the ceiling, a motor having a motor shaft connected to the lower portion of the down rod and a motor body which rotates about the motor shaft, a motor housing secured to either the motor shaft or the down rod which is stationary and surrounds the motor, blade mounting arms which are connected to the motor body and extend out of an opening of the motor housing or below the motor housing, and a hub attached to the motor shaft below the fan blades and fan blade arms, the hub is directly connect to an electric motor. Motor is used for driving the vanes to rotate and produce winds, so as to achieve the air cooling effect. The blades are powered by a direct /alternate current (DC /AC) electric motor that converts electrical energy into mechanical energy. This conversion of electrical energy into mechanical energy causes the ceiling fan to rotate. However, there are various other technologies embedded in ceiling fans extending to have additional functions including a sleep mode, a decoration, an illumination, a low power consumption, and a remote control function, in addition to providing wind and heat dissipation.
In certain cases ceiling fans are mounted directly adjacent to a ceiling (direct mount) or mounted to the ceiling by way of a downrod, which allows the ceiling fan to hang down from the ceiling a certain distance, for example, 6 in., 1 ft., 2 ft., 3 ft., 4 ft., etc. In both cases, whether directly mounted to the ceiling or mounted by way of a downrod, the position or height of the ceiling fan above the floor remains fixed. However, when these high ceilings have a ceiling fan, these fans may not be reachable by ordinary means. Maintenance of high ceiling fans or other fixtures can be dangerous, expensive, and inconvenient. Frequently, home and business owners forego replacing light bulbs and regular dusting because of the inconvenience or fear of climbing up and using tall ladders.
Since the use of ceiling fans have become very popular in everyday life and users have high demands on stability, safety, comfortability, convenience for its functions, therefore finding a way for raising and lowering ceiling fan in order to clean the ceiling fan and to adjust the height of the ceiling fan for proper effectiveness becomes an important point for the design of a good ceiling fan system in the industry.
Various devices and custom fixtures have been proposed in the art for automatically or manually lowering fixtures from a ceiling or rod.
US Patent 6357714 provides a ceiling fan support system which contains multiple, perimeter downrods connected between a ceiling fan housing and supporting structure attached to a ceiling. The perimeter rods may provide some or all of the supporting structure to suspend the ceiling fan housing. In order to accommodate sloped ceilings, the perimeter downrods may be made of adjustable length.
Another US Patent 9546665 relates to a levitating ceiling fan assembly including a motor with a stator and a rotor, a downrod assembly having a longitudinal slot therein and a base portion, and a plurality of fan blades attached to the rotor. The motor is capable of sliding along the downrod assembly in order to change the position along the downrod assembly that the plurality of fan blades rotate. Additionally, the speed at which the plurality of fan blades rotate corresponds to the height above the base portion that the plurality of fan blades elevate.
US patent application 20020085919 discloses a Motorized ceiling fan lifting and lowering apparatus for lowering a ceiling fan so that the ceiling fan may be easily cleaned. The motorized ceiling fan lifting and lowering apparatus includes a tubular member, which is elongated and has a first end and a second end. The first end is open. A shoulder is integrally coupled to an edge of the first end and extends inwardly. A lip extends upwardly from the shoulder. The lip has a threaded inner surface. The second end of the tubular member is coupled to a ceiling fan. A motor is attached to the ceiling. A shaft has a first end attached to the motor such that the motor may selectively rotate the shaft in a first direction or a second direction. The shaft is threaded and has a second end extending through the lip and into the tubular member such that the shaft threadably engages the lip. An actuator selectively actuates the motor in the first or second direction for lowering and lifting the ceiling fan. The actuator is electrically coupled to the motor.
Another US Patent application 20090074587A1 provides telescopic ceiling fan apparatus for raising and lowering a ceiling fan includes an outer housing member; and an inner housing member to move with respect to the outer housing member and to move the ceiling fan. The apparatus includes a limit switch to limit the movement of the inner housing member, and the apparatus includes a threaded bushing member. The apparatus includes a drive gear member, and the apparatus includes a hubbed gear member. The apparatus includes a trip bar member to engage the limit switch member and includes a cable reel member for electrical wires for the ceiling fan.
US Patent Application 20080193291 relates to a descendable ceiling fixture which includes a base, a functioning unit, and a lowering assembly. The functioning unit may be a light fixture or a ceiling fan. The functioning unit is movable between a first configuration adjacent the base and a second configuration separated therefrom. The lowering assembly includes a plurality of retractable cables having lower ends and extending downwardly from the base, each cable lower end being coupled to the functioning unit. The lowering assembly includes a spring reel for holding the functioning unit at the second configuration and for returning it to the first configuration upon application of a predetermine force. The lowering assembly may include a motor for automatically extending or retracting the cables. The invention includes a safety feature by which the functioning unit is disconnected from electricity when lowered and is reconnected when raised.
Although all of the prior-arts are effective in their intended purposes, the existing devices do not provide an economical, easy and smooth level of operation, where the ceiling fans can be reached easily in a convenient standing position without the need of any external assistance such as a ladder. Further all of the prior arts includes motorized or electrical switches for lifting and lowering the ceiling fans. Therefore there exists a need in the art for ceiling fans that can elevate or slide down to a convenient workable height from the floor level. And also there exists a need for a simple yet robust mechanism for selective lifting and lowering of a ceiling fan to the required height for easily cleaning, maintenance or repair.
The present invention provides a ceiling fan with an extendable telescopic down rod mechanism for lowering the high ceiling fans to a level that may be reached by standing on the floor. The present invention facilitates to bring down the ceiling fan to accessible workable height without using a ladder or any equipment. The present invention consists of fixing the ceiling fan in an extendable telescopic down rod instead of fixed length down rod reduces the human effort for servicing and cleaning of ceiling fan.
Objects of the Invention:
The main object of the present invention is to provide a ceiling fan with an extendable telescopic down rod assembly instead of fixed length down rod.
The primary object of the present invention to provide a ceiling fan with an extendable telescopic down rod assembly for lowering the high ceiling fans to a level that may be reached by standing on the floor.
It is another object of the present invention to provide a ceiling fan with an extendable telescopic down rod assembly which enables to bring down the ceiling fan to accessible workable height without using a ladder or any equipment.
Still another object of the present invention is to provide a ceiling fan with multiple telescopic extendable downrods which enables easy elevation and lowering of ceiling fan for easy cleaning, maintenance and repair.
It is another object of the present invention is to provide a safe, stable, easy handling, comfortable and convenient way of raising and lowering ceiling fan for easy cleaning and also to adjust the height of the ceiling fan for its proper effectiveness.
Although the present invention is mainly designed as a telescopic extendable downrods assembly for fixing ceiling fans which enables easy elevation and lowering of ceiling fan for easy cleaning, maintenance and repair, it goes without saying that the present invention multiple telescopic extendable downrods assembly can be applied and adapted to other high ceiling fixtures including lights, chandeliers etc.
Summary of the Invention
The present invention provides a ceiling fan assembly with multiple extendable telescopic down rods instead of fixed length down rod which enables easy elevation and lowering of ceiling fan for easy cleaning, maintenance and repair. The present invention provides a ceiling fan with an extendable telescopic down rod assembly which enables to bring down the ceiling fan to accessible workable height that can be reached from the floor without using a ladder or any equipment, comprising of : a motor; a plurality of brackets; a plurality of blades; atleast an extendable telescopic downrod assembly provided with a plurality of extendable telescopic downrods having different diameters with progressively decreasing diameters from the upper end to the bottom end of the downrod assembly, which are extended to lower the ceiling fan to an accessible working height for cleaning or other services, wherein said downrod assembly in a collapsed or contracted state can slide into one over the other and position the ceiling fan in its original height from the ceiling for its operation.
In the preferred embodiment of the present invention, wherein said downrod at the upper most end is provided with a kidney slot, wherein said downrod at the lower most end is provided with a cross dowel, and said plurality of downrods positioned below the upper most downrod and above the lower most downrod are provided with a dowel pin guide slot.
In the preferred embodiment of the present invention, wherein said ceiling fan assembly with extendable telescopic downrods further comprises of a handle specifically designed to lower or lift the ceiling fan by a person operating from the floor. Wherein said handle is operated to lower the ceiling fan by lifting the cross dowel of the lower most downrod slightly from the kidney slot of the upper most downrod and made to slide into the guide slot provided in the plurality of downrods to bring down the ceiling fan from the high ceiling position to an accessible working height from the floor. Wherein said handle is operated to lift up the ceiling fan to the original ceiling height is done by positioning the handle below the cross dowel of the lower most downrod, pushing up the lower most downrod over the said plurality of downrods making the said plurality of downrods to collapse or contract and thereby reaching the upper most position, wherein in the said upper most position the lower most downrod is rotated to position the cross dowel pin in the kidney slot of the upper most down rod.
In an embodiment of the present invention, it also provides a method of operation of the ceiling fan assembly with multiple extendable telescopic down rods, for lowering and/or lifting up the high ceiling fans to an accessible workable height level that can be reached from the floor without using a ladder or any equipment.
Other features and advantages of embodiments will be apparent from the accompanying drawings and from the detailed description that follows.
Brief Description of the Drawings
Fig.1 shows the conventional prior art ceiling fan (31) assembly for hanging the ceiling fan from the ceiling using downrod (37) having a fixed length and diameter.
Fig. 2 shows the ceiling fan assembly (81) with multiple extendable telescopic down rods (85), for lowering the high ceiling fans to an accessible workable height level that can be reached from the floor without using a ladder or any equipment in accordance with the present invention.
Fig. 3 represents the multiple extendable telescopic downrods assembly (85) with a plurality of extendable telescopic downrods (89a, 89b,89c) having different diameters which is in extended state to lower the ceiling fan to an accessible working height in accordance with the present invention.
Fig. 4 represents the ceiling fan assembly (81) in a collapsed or contracted state wherein said plurality of extendable telescopic downrods (89a, 89b,89c) having different diameters are slide into one over the other and position the ceiling fan (81) in its original height from the ceiling (86) for its operation. It also shows the locking state of the cross dowel (93) of the lower most downrod (89c) with the kidney slot (94) provided in the upper most downrod (89a).
Fig.5 represents the operator (91) operating the ceiling fan assembly (81) of the present invention from floor (92) by means a specially designed handle (90) in accordance with the present invention.
Fig.6 shows the specially designed handle (90) designed to operate the ceiling fan assembly (81) with multiple extendable telescopic downrods (85) to lower or lift the ceiling fan in accordance with the present invention.
While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concept of the term appropriately to describe its own invention in the best way. The present invention should be construed as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, it should be understood that equivalents and modifications are possible.
Detailed Description of the Invention with Respect to the Drawings
The present invention as embodied by "Ceiling fan assembly with extendable telescopic down rod" succinctly fulfils the above-mentioned need(s) in the art. The present invention has objective(s) arising as a result of the above-mentioned need(s), said objective(s) being enumerated below. In as much as the objective(s) of the present invention are enumerated, it will be obvious to a person skilled in the art that, the enumerated objective(s) are not exhaustive of the present invention in its entirety, and are enclosed solely for the purpose of illustration. Further, the present invention encloses within its scope and purview, any structural alternative(s) and/or any functional equivalent(s) even though, such structural alternative(s) and/or any functional equivalent(s) are not mentioned explicitly herein or elsewhere, in the present disclosure. The present invention therefore encompasses also, any improvisation(s)/ modification(s) applied to the structural alternative(s)/functional alternative(s) within its scope and purview. The present invention may be embodied in other specific form(s) without departing from the spirit or essential attributes thereof.
Throughout this specification, the use of the word "comprise" and variations such as "comprises" and "comprising" may imply the inclusion of an element or elements not specifically recited.
As it is well known in the art, ceiling fans may be attached to a ceiling using any of several different techniques. Perhaps the most common technique is to suspend the ceiling fan motor and housing from a single downrod. This prior art approach is illustrated in FIG. 1.
Referring to FIG. 1, a prior art ceiling fan (31) structure includes a motor housed inside the ceiling fan motor housing (32). Brackets (33), of which only two are shown in FIG. 1, are attached to the rotor (34) of the ceiling fan motor. Blades (35) are attached to brackets (33) by bolts or other attachment means known in the art. Motor housing (32) is supported from ceiling (36) by a downrod (37). Downrod (37) is connected to fan housing by an attachment bracket. Power for the fan motor is carried via electric wires which pass through downrod (37). Downrod (37) is connected to ceiling (36) through a bracket and a ball-joint member (38). Ball-joint member (38) is free to move, in a limited range, with respect to bracket. This allows the downrod (37) to hang vertically if bracket is attached to a sloped ceiling and allows a certain freedom of movement of the fan housing during operation. Bracket is generally covered by a decorative canopy (39), which has an opening in the bottom for passage of downrod (37).
Normally for hanging the ceiling fan from the ceiling downrod (37) having a fixed length and diameter is used. So, for cleaning or servicing, one must climb up using a ladder.
The present invention provides a ceiling fan assembly with multiple extendable telescopic down rods (81), for lowering the high ceiling fans to an accessible workable height level that can be reached from the floor without using a ladder or any equipment, comprising of : a motor housed within the motor housing (82); a plurality of brackets(83), attached to the rotor of the ceiling fan motor; a plurality of blades (84), attached to the said plurality of brackets (83) by bolts; atleast an extendable telescopic downrod assembly (85) for supporting the motor housing (81) from ceiling (86), wherein said downrod assembly (85) is connected to ceiling (86) through atleast a bracket and a ball-joint member (87); a top canopy (88) for housing the Bracket, wherein said canopy (88) is provided with an opening in the bottom for passage of extendable telescopic downrod assembly (85), wherein said extendable telescopic downrod assembly (85) includes a plurality of extendable telescopic downrods (89a, 89b,89c) having different diameters which can be extended to lower the ceiling fan to an accessible working height, wherein said extendable telescopic downrod assembly (85) in a collapsed or contracted state the said plurality of extendable telescopic downrods (89a, 89b,89c) having different diameters are slide into one over the other and position the ceiling fan in its original height from the ceiling for its operation.
In the preferred embodiment of the present invention, wherein said plurality of extendable telescopic downrods (89a, 89b,89c) having different diameters includes a progressively decreasing diameters from the upper end to the bottom end of the downrod assembly enabling the plurality of downrods to slide into one over the other.
In the preferred embodiment of the present invention, wherein said downrod at the upper most end (89a) of the said plurality of downrods is provided with the largest diameter.
In the preferred embodiment of the present invention, wherein said downrod at the lower most end (89c) of the said plurality of downrods is provided with the smallest diameter.
In the preferred embodiment of the present invention, wherein said downrod at the upper most end (89a) of the said plurality of downrods is provided with a kidney slot (94).
In the preferred embodiment of the present invention, wherein said downrod at the lower most end (89c) of the said plurality of downrods is provided with a cross dowel (93) for lifting ceiling fan up or lowering the ceiling fan down.
In the preferred embodiment of the present invention, wherein said downrod (89d) positioned below the lower most downrod (89c) of the said plurality of downrods is provided with a slot (96) for fixing the ceiling fan.
In the preferred embodiment of the present invention, wherein said plurality of downrods (89b) positioned below the upper most downrod and above the lower most downrod are provided with a dowel pin guide slot (95).
In the preferred embodiment of the present invention, wherein said plurality of downrods in the collapsed or contracted state are slide into one over the other and a cross dowel (93) fixed in the lower most downrod (89c) is locked with the kidney slot (94) provided in the upper most downrod (89a).
In the preferred embodiment of the present invention, wherein said ceiling fan assembly with extendable telescopic downrods further comprises of a handle (90) specifically designed to lower or lift the ceiling fan by a person (91) operating from the floor (92).
In the preferred embodiment of the present invention, wherein said ceiling fan assembly (81) with extendable telescopic downrods can be operated from the floor (92) either in standing position or sitting position.
In the preferred embodiment of the present invention, wherein said handle (90) is operated to lower the ceiling fan by lifting the cross dowel (93) of the lower most downrod (89c) slightly from the kidney slot (94) of the upper most downrod (89a) and made to slide into the guide slot (95) provided in the plurality of downrods (89b) to bring down the ceiling fan (81) from the high ceiling (86) position to an accessible working height from the floor (92).
In the preferred embodiment of the present invention, wherein said handle (90) is operated to lift up the ceiling fan (81) to the original ceiling (86) height is done by positioning the handle (90) below the cross dowel (93) of the lower most downrod (89c), pushing up the lower most downrod (89c) over the said plurality of downrods (89b,89a) making the said plurality of downrods to collapse or contract and thereby reaching the upper most position, wherein in the said upper most position the lower most downrod (89c) having the cross dowel pin (93) is rotated to position the cross dowel pin (93) into the kidney slot (94) of the upper most down rod (89a).
In another embodiment of the present invention, wherein said extendable telescopic down rod assembly (85) is operated via air shock mechanism.
In another embodiment of the present invention, wherein said extendable telescopic down rod assembly (85) is operated via electric actuated mechanism.
In an embodiment of the present invention, method of operation of the ceiling fan assembly (81) with multiple extendable telescopic down rods(85), for lowering and/or lifting up the high ceiling fans to an accessible workable height level that can be reached from the floor without using a ladder or any equipment, comprising steps of :
Ceiling fan (81) positioned in the high ceiling (86) is provided with the extendable telescopic downrod assembly (85), wherein said extendable telescopic downrod assembly includes a plurality of extendable telescopic downrods (89a,89b,89c) having different diameters, which are progressively decreasing diameters from the upper end to the bottom end of the downrod assembly enabling the plurality of downrods to slide into one over the other in a collapsed or contracted state;
• locking the cross dowel (93) of the lower most downrod (89c) with the kidney slot (94) of the upper most downrod (89a) by using the handle (90), wherein said locking positions the ceiling fan (81) in the original ceiling height (86);
• lifting the cross dowel (93) of the lower most downrod (89c) slightly from the kidney slot (94) of the upper most downrod (89a) using the said handle (90);
• sliding the cross dowel (93) of the lower most downrod (89c) into the guide slot (95) of the plurality of downrods (89b);
• lowering the ceiling fan (81) from the high ceiling (86) position to an accessible working height from the floor (92);
• performing cleaning and/or other maintenance service on the ceiling fan;
• lifting up the ceiling fan (81) by positioning the handle (90) below the cross dowel (93) of the lower most downrod (89c);
• pushing up the lower most downrod (89c) over the said plurality of downrods (89a,89b) making the said plurality of downrods with different diameters to collapse or contract;
• leading the lower most downrod (89c) to the upper most position to the original ceiling (86) height;
• rotating the lower most downrod (89c) having the cross dowel pin (93) to position the cross dowel pin (93) with the kidney slot (94) of the upper most down rod (89a);
• locking the cross dowel (93) of the lower most downrod (89c) with the kidney slot (94) of the upper most downrod (89a) by using the handle (90); and
• Positioning the ceiling fan (81) in its original ceiling (86) height.
EXAMPLE
The present invention provides a ceiling fan assembly (81) with multiple extendable telescopic down rods (85), for lowering and/or lifting the high ceiling fans to an accessible workable height level that may be reached from the floor without using a ladder or any equipment, comprising of : a motor housed within the motor housing (82); a plurality of brackets (83), attached to the rotor of the ceiling fan motor; a plurality of blades (84), attached to the said plurality of brackets (83) by bolts; atleast an extendable telescopic downrod assembly (85) for supporting the motor housing (82) from ceiling (86), wherein said downrod assembly (85) is connected to ceiling (86) through atleast a bracket and a ball-joint (87). wherein said extendable telescopic downrod assembly (85) includes a plurality of extendable telescopic downrods (89a,89b,89c) having different diameters which are progressively decreasing diameters from the upper end to the bottom end of the downrod assembly that can be extended to lower the ceiling fan to an accessible working height. A handle (90) specifically designed for the assembly is used for lowering or lifting the ceiling fan (81) by the person (91) operating from the floor (92). Lowering the ceiling fan from the high ceiling (86) position to an accessible working height from the floor (92) involves lifting the cross dowel (93) of the lower most downrod (89c) slightly from the kidney slot (94) of the upper most downrod (89a) using the said handle (90) and sliding the cross dowel (93) of the lower most downrod (89c) into the guide slot (95) of the plurality of downrods (89b), which makes the downrod assembly in an extended state thereby lowering the ceiling fan (81) from the high ceiling position to perform cleaning and/or other maintenance service on the ceiling fan. Once the cleaning or servicing is completed the ceiling fan (81) is lifted up and again positioned to its original ceiling (86) height by positioning the handle (90) below the cross dowel (93) of the lower most downrod (89c), pushing up the lower most downrod (89c) over the said plurality of downrods (89a,89b) making the said plurality of downrods with different diameters to collapse or contract, leading the lower most downrod (89c) to the upper most position to the original ceiling (86) height, rotating the lower most downrod (89c) having the cross dowel pin (93) to position the cross dowel pin (93) with the kidney slot (94) of the upper most down rod (89a) and locking the cross dowel (93) of the lower most downrod with the kidney slot (94) of the upper most downrod by using the handle (90) thereby positioning the ceiling fan back to its original ceiling (86) height for its normal operations. Wherein the extendable telescopic downrod assembly (85) can also be operated via air shock mechanism or electric actuated mechanism.
It will be apparent to a person skilled in the art that the above description is for illustrative purposes only and should not be considered as limiting. Various modifications, additions, alterations, and improvements without deviating from the scope of the invention may be made by a person skilled in the art.