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
Spring & Spring Support Safety for Pedestal Fan.
APPLICANTS
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. 1, Goa IDC Industrial Estate, Bethora, Ponda. Goa-403409, 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:
This invention relates to the field of pedestal fan assemblies and shock absorbing assemblies,
Particularly, this invention relates to a pedestal fan with spring support mechanism,
BACKGROUND OF THE INVENTION:
Pedestal fans are generally mounted on cast iron base with the help of base pipe along with the telescopic pipe. Base pipe is generally fitted either by threading or by welding to the base which gives a small height to the fan and also provides stability. Rest of the height is provided by the telescopic pipe which is passed through the base pipe. The telescopic pipe telescopes out of the base pipe and is kept in place, to define a required height, with the help of moulded knob through a Cup, which limits its movement. Figure 1 illustrates a pedestal fan with support, according to the prior art.
Reference numeral 10 refers to the fan motor. Reference numeral 12 refers to the base. Reference numeral 14 refers to the base pipe. Reference numeral 16 refers to the telescopic pipe. Reference numeral 18 refers to the knob. Reference numeral 20 refers to a rubber sleeve at the bottom of the telescopic pipe.
Typically, a motor may weigh about 5kg. In its normal operating position, the motor is well balanced on the base pipe and telescopic pipe.

However, it has been observed that as the telescopic pipe telescopes out of the base pipe to increase the height of the fan, the motor wobbles because of the weight and telescopic pipe starts to slide down, as the whole load of the fan, including motor, is translated on to the knob as there is a pressure contact between the knob and the telescopic pipe. Because of the fan load, the knob may get loosened or damaged during running condition which may cause noise and vibration in the fan and there are chances of fan falling down or tipping, if the base is not stable and may cause injury to a user, thereby posing a serious threat.
There is a need for a mechanism which absorbs the wobbling effect and gives a opposite support to the motor weight at the time of failure of knob.
OBJECTS OF INVENTION:
An objective of the invention is to provide a pedestal fan which eliminates problems associated with wobbling.
Another objective of the invention is to provide a pedestal fan which ensures a safety for the end user.
Yet another objective of the invention is to provide a pedestal fan which reduces the vibration and noise.
SUMMARY OF THE INVENTION:
According to this invention, there is provided a pedestal fan comprising:

a fan motor mounted on a telescopic shafted adapted to slide into a
base shaft connected to a base,
characterized in that,
a spring support mechanism adapted to abut said telescopic shaft at
its operative bottom, within said base pipe, in order to damp the
load of said motor through said telescopic shaft, thereby avoiding
its transfer to said base and base pipe.
Typically, said spring support mechanism comprises:
a. first shaft adapted to be coaxial with said telescopic pipe;
b. first collar, placed operatively below said first shaft, adapted to
support said first shaft;
c. smaller second shaft, operatively extending beneath said first shaft
and said first collar;
d. second collar, placed operatively below said second shaft, adapted
to support said second shaft wherein, said first shaft, said second
shaft, said first collar, said second collar are coaxial with said
telescopic shaft and abut said telescopic shaft at its operative
bottom; and
e. spring wound around said first shaft to receive the downward force
of said motor placed on said telescopic shaft.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
The invention will now be described in relation to the accompanying drawings, in which:

Figure 2 illustrates a schematic of a pedestal fan with spring support mechanism in its relaxed state;
Figure 3 illustrates a schematic of a pedestal fan with spring support mechanism in its compressed state;
Figure 4 illustrates a front view of the spring support mechanism; and
Figure 5 illustrates an auxiliary view of the spring support mechanism.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
According to this invention, there is provided a pedestal fan with spring support mechanism.
Figure 2 illustrates a schematic of a pedestal fan with spring support mechanism in its relaxed state. Figure 3 illustrates a schematic of a pedestal fan with spring support mechanism in its compressed state. Figure 4 illustrates a front view of the spring support mechanism. Figure 5 illustrates an auxiliary view of the spring support mechanism.
In accordance with an embodiment of this invention, there is provided a securing means adapted to secure the base pipe over the base plate. Preferably, the securing means is a bolt (40).
In accordance with another embodiment of this invention, there is provided a spring support mechanism (2G0) adapted to be placed

operatively beneath said telescopic pipe, within said base pipe. Thus, as the telescopic pipe telescoped within the base pipe, the spring support mechanism telescopes further into the base pipe, before the shaft of the telescopic pipe telescopes into the base pipe.
Typically, the spring support mechanism includes a first shaft (42) adapted to be coaxial with said telescopic pipe. The first shaft rests on a first collar (44) and further extends into a relatively smaller second shaft (46) which rests on a second collar (48). Said first shaft, said second shaft, said first collar, said second collar are all coaxial with said telescopic shaft and abut said telescopic shaft at its operative bottom. A spring (50) is wound around said first shaft to receive the downward force of the motor which is placed on the telescopic shaft, in the event that the telescopic shaft is telescoped into the base pipe, for reducing height of the fan. The spring compresses (as seen in Figure 4 of the accompanying drawings). The spring absorbs the vibration caused due to the change in balance and wobbling. These vibrations, hence, do not effect on to the base pipe, and thus curb the tipping over of the fan.
It will be appreciated by those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The presently disclosed embodiments are therefore considered in all respects to be illustrative and not restricted. The scope of the invention is indicated by the appended claims rather than the foregoing description and all changes that come within the meaning and range and equivalence thereof are intended to be embraced therein.

We claim,
1. A pedestal fan comprising:
a fan motor mounted on a telescopic shafted adapted to slide into a
base shaft connected to a base,
characterized in that,
a spring support mechanism adapted to abut said telescopic shaft at
its operative bottom, within said base pipe, in order to damp the
load of said motor through said telescopic shaft, thereby avoiding
its transfer to said base and base pipe.
2. A spring support mechanism as claimed in claim 1 wherein, said
spring support mechanism comprising:
a. first shaft adapted to be coaxial with said telescopic pipe;
b. first collar, placed operatively below said first shaft, adapted to
support said first shaft;
c. smaller second shaft, operatively extending beneath said first shaft
and said first collar;
d. second collar, placed operatively below said second shaft, adapted
to support said second shaft wherein, said first shaft, said second
shaft, said first collar, said second collar are coaxial with said
telescopic shaft and abut said telescopic shaft at its operative
bottom; and
e. spring wound around said first shaft to receive the downward force
of said motor p\aced on said te\esc'opic shaft.