FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF INVENTION
An equipment for eliminating the noise and vibration in a
pedestal fan; and a pedestal fan thereof
APPLICANT
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 025, Maharashtra, India; an Indian Company. INVENTOR
Bhat Amit of Crompton Greaves Limited, Fans Division, Plot No 81, HPSIDC Industrial Area, Baddi, District - Solan, Himachal Pradesh, India; an Indian National.
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the nature of this invention and the manner in which it is to be performed:

FIELD OF THE INVENTION
The current invention relates to the field of pedestal fan assemblies and shock and assemblies and equipment for elimination of noise and vibration in a pedestal fan.
Particularly, the current invention relates to an equipment for eliminating the noise and vibration in a pedestal fan.
The current invention also relates to a pedestal fan incorporating an equipment for eliminating the noise and vibration in a pedestal fan.
BACKGROUND OF THE INVENTION:
A mechanical fan is a machine used to create flow within a fluid, typically a gas such as air.
A fan consists of a rotating arrangement of vanes or blades which act on the air. Most fans are powered by electric motors, but other sources of power may be used, including hydraulic motors and internal combustion engines and solar power.
Fans are available in a variety of sizes and shapes. Fan can be ceiling fan, pedestal fan, table fan, wall-mounted fan or a multi-utility fan.
Pedestal fans offer the user a unique mobility and independence in receiving quality breeze in every nook and corner of the room. Pedestal fans are useful when an elevated fan is desired which is portable and with adjustable air flow direction.

In pedestal fan, the drive apparatus and the rotary blades are mounted on a base with the help of a base pipe and a telescopic pipe. The blade or impeller fitted on the motor along with full assembly leads to imbalance and concentration of the weight near the region of fan blades. This causes vibration of the fan during its operation. The vibration further results in unwanted noise. If unchecked, this can lead to catastrophic fan failure and costly outages.
US Patent Application No. 2001011695 discloses pedestal wherein a dampening element is disposed within the tubular column for dampening vibration of the apparatus during use of the powered fan. However, this apparatus cannot be used in a pedestal fan which includes a telescopic shaft telescoping in and out of a base shaft.
Thus a need remains for a means to eliminate or substantially reduce the vibration and noise associated with the pedestal fan.
OBJECTS OF INVENTION
An objective of the invention is to provide equipment that eliminates vibration and noise in a pedestal fan.
Another objective of the invention is to provide an equipment that eliminates vibration and noise in a pedestal fan, which equipment is inexpensive to construct. '
Another objective of the invention is to provide an equipment that eliminates vibration and noise in a pedestal fan by establishing contact between back guard and telescopic shaft of the fan.

Another objective of the invention is to provide an equipment that eliminates vibration and noise in a pedestal fan by establishing contact between back guard and telescopic shaft of the fan without hindrance to the oscillation of the fan.
Another objective of the invention is to provide an equipment that eliminates vibration and noise in a pedestal fan by establishing contact between back guard and telescopic shaft of the fan without preventing adjustment of the height of the pedestal fan.
Still another objective of the invention is to provide a pedestal fan which will remove customer complaints.
Yet another objective of the invention is to provide a pedestal fan with reduced vibration and noise.
SUMMARY OF THE INVENTION:
According to this invention, there is provided an equipment for a pedestal fan, said equipment comprising a first member and a second member, wherein the first member further is a U-shaped member for gripping the girth of the telescopic shaft of the pedestal fan, and a straight elongate member connecting the base of the U-shaped region to the second member; and wherein the second member is attached to the straight elongate member of the first member at its one end and to a back guard of the pedestal fan at its other end.

According to this invention, there is provided a pedestal fan incorporating an equipment for eliminating noise and vibration , said equipment comprising a first member and a second member, wherein the first member further is a U-shaped member for gripping the girth of the telescopic shaft of the pedestal fan, and a straight elongate member connecting the base of the U-shaped region to the second member; and wherein the second member is attached to the straight elongate member of the first member at its one end and to a back guard of the pedestal fan at its other end..
Typically, said second member includes a bolt adapted to bolt and secure said equipment onto back guard of said fan.
Typically, said U-shaped member grips said telescopic shaft of the pedestal fan such that it allows free and frictionless rotation about the axis of said telescopic shaft of said pedestal fan.
Typically, said U-shaped member grips said telescopic shaft of said pedestal fan such that it allows free and frictionless rotation in the direction of the axis of said telescopic shaft of said pedestal fan.
Typically, said first member is made up of a material allowing free and frictionless movement about the axis of said telescopic shaft.
Preferably, said first part is made up of polytetrafluoroethylene.
BRIEF DESCRIPTION OF THE ACCOMPANYNG DRAWINGS
Figure 1 illustrates an exploded view of the pedestal fan of the prior art.

The invention will now be described in relation to the accompanying drawings, in which:
Figure 2 illustrates a schematic of the equipment for eliminating the vibration and noise in the pedestal fan; and
Figure 3 illustrates the pedestal fan incorporating equipment for eliminating the vibration and noise in the pedestal fan.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 illustrates an exploded view of the pedestal fan of the prior art.
In a pedestal fan, the drive apparatus (10) and the rotary blades (11) are mounted on a base (12) with the help of a base pipe (13) and a telescopic shaft (14), co-axial with the base pipe. The base pipe is generally fitted to the base either by threading or by welding which gives a small height to the fan and also provides stability. The telescopic pipe is located at least partially within and slidable relative to the outer base pipe. The telescopic pipe is tightened to the base pipe with the help of a knob (16). The telescopic shaft can be slid, operatively upwards or operatively downwards, in the direction of its axis (15) to adjust the height of the pedestal fan as required and fastened in the required position by tightening the knob. The blades are contained within some form of a housing or a cage. This may direct the airflow or increase safety by preventing objects from contacting the rotating fan blades. This caged structure is called the fan guard. The fan guard comprises a front fan guard (17) and a back fan guard, also called as the back guard (18).

These fans are usually capable of oscillating from side to side by means of the telescopic shaft that rotates about its axis. It serves the purpose of spreading the cooled air in all directions.
Fan guard is always fitted on to the motor which in turn is mounted on the telescopic pipe. Thus, the centre of gravity of a pedestal fan is usually located towards the top of the pedestal. The blade or impeller fitted on the motor, along with full assembly, leads to imbalance and concentration of the weight near the region of fan blades. This causes unwanted vibration and noise generation during its operation.
Figure 2 illustrates the schematic of the equipment (50) for eliminating the vibration and noise in the pedestal fan. The equipment comprises a first member and a second member (40), wherein the first member further is a U-shaped member (20) for gripping the girth of the telescopic shaft of the pedestal fan, and a straight elongate member (30) connecting the base of the U-shaped region to the second member; and wherein the second member is attached to the straight elongate member of the first member at its one end and to a back guard (18) of the pedestal fan at its other end.
Figure 3 illustrates the pedestal fan (100) incorporating the equipment (50) of Figure 2. The fan includes an equipment which comprises a first member and a second member (40), wherein the first member further is a U-shaped member (20) for gripping the girth of the telescopic shaft of the pedestal fan, and a straight elongate member (30) connecting the base of the U-shaped region to the second member; and wherein the second member is attached to the straight elongate member of the first member at its one end and to a back guard (18) of the pedestal fan at its other end.

The second member includes a bolt adapted to bolt and secure said equipment onto the back guard (18) of the fan. The second member is secured to the back guard of the fan in such a way that it remains fixed.
Also, the U-shaped part grips the telescopic shaft (14) of the pedestal fan (100) such that it allows free and frictionless rotation about the axis (15) of the telescopic shaft (14) of the pedestal fan (100).
Further, the U-shaped region grips the telescopic shaft (14) of the pedestal fan such that it allows free and frictionless movements in the direction of the axis (15) of the telescopic shaft (14) of the pedestal fan (100).
The first member is made up of a material allowing free and frictionless movement about the axis as well as in the direction of the axis of the telescopic shaft.
Preferably, the first member of the equipment is made up of polytetrafluoroethylene.
The free and frictionless rotation of the first member of the equipment about the axis of the telescopic shaft provides for deterrence-free oscillation of the fan from side to side, thus allowing spreading the cooled air in all the direction without any hindrance.
The free and frictionless rotation of the first member of the equipment in the direction of the axis of the telescopic shaft provides for easy sliding of the telescopic shaft relative to the outer base pipe, thus allowing adjustment of the height of the pedestal fan as required.

The equipment provides a direct contact between the back guard and the telescopic shaft of the fan. This provides additional support and balance thus providing stability in the pedestal fan. This eliminates the vibration and noise in the pedestal fan.
While this detailed description has disclosed certain specific embodiments of the present invention for illustrative purposes, various modifications will be apparent to those skilled in the art which do not constitute departures from the spirit and scope of the invention as defined in the following claims, and it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

We claim,
1) An equipment for a pedestal fan, said equipment comprising a first member and a second member, wherein the first member further is a U-shaped member for gripping the girth of the telescopic shaft of the pedestal fan, and a straight elongate member connecting the base of the U-shaped region to the second member; and wherein the second member is attached to the straight elongate member of the first member at its one end and to a back guard of the pedestal fan at its other end.
2) The equipment as claimed in claim 1 wherein, said second member includes a bolt adapted to bolt and secure said equipment onto back guard of said fan.
3) The equipment as claimed in claim 1 wherein, said U-shaped member grips said telescopic shaft of the pedestal fan such that it allows free and frictionless rotation about the axis of said telescopic shaft of said pedestal fan.
4) The equipment as claimed in claim 1 wherein, said U-shaped member grips said telescopic shaft of said pedestal fan such that it allows free and frictionless rotation in the direction of the axis of said telescopic shaft of said pedestal fan.
5) The equipment as claimed in claim 1 wherein, said first member is made up of a material allowing free and frictionless movement about the axis of said telescopic shaft.

6) The equipment as claimed in claim 1 wherein, said first part is made up of polytetrafluoroethylene.
7) A pedestal fan incorporating an equipment for eliminating noise and vibration , said equipment comprising a first member and a second member, wherein the first member further is a U-shaped member for gripping the girth of the telescopic shaft of the pedestal fan, and a straight elongate member connecting the base of the U-shaped region to the second member; and wherein the second member is attached to the straight elongate member of the first member at its one end and to a back guard of the pedestal fan at its other end.
8) The equipment as claimed in claim 7 wherein, said second member includes a bolt adapted to bolt and secure said equipment onto back guard of said fan.
9) The equipment as claimed in claim 7 wherein, said U-shaped member grips said telescopic shaft of th<; pedestal fan such that it allows free and frictionless rotation about the axis of said telescopic shaft of said pedestal fan.
10) The equipment as claimed in claim 7 wherein, said U-shaped member grips said telescopic shaft of said pedestal fan such that it allows free and frictionless rotation in the direction of the axis of said telescopic shaft of said pedestal fan.

11) The equipment as claimed in claim 7 wherein, said first member is made up of a material allowing free and frictionless movement about the axis of said telescopic shaft.
12) The equipment as claimed in claim 7 wherein, said first part is made up of polytetrafluoroethylene.