FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
PROVISIONAL SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION SILENT TOOL BOX


APPLICANTS
TATA MOTORS LIMITED, an Indian company
having its registered office at Bombay House,
24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India

INVENTORS
Mr. Dattatraya R. Katkar, Mr. Deepak S. Kulkarni and Mr. N B Khandarkar
all Indian nationals of TATA MOTORS LIMITED,
an Indian company having its registered office
at Bombay House, 24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner
in which it is to be performed


FIELD OF INVENTION:
This invention deals with general mechanic's tool box. More particularly, it deals with a portable silent toolbox on wheels which produces less noise during transportation / movement.
BACKGROUND OF INVENTION:
General mechanic's toolbox is very common equipment in mechanical industry. Every technician working on the shop floor possesses a toolbox which contains the general purpose and special tools that are used in day to day working. The toolbox is made up of sheet metal and has a box like construction.
Typically, the toolbox is mounted on a carrier frame and the carrier frame has wheels which facilitate the transportation of the tool box to work place. The technician carries the tool box by pulling it through a cable or a handle attached to the carrier frame. The tool box is manufactured as per design where as the carrier frame and the wheel arrangement is fabricated by the individual technician at site to as per his requirement. Even though, this arrangement serves the purpose the arrangement of transportation, it poses following problems - During the transportation of the tool box it generates a higher noise. The primary sources of noise from the too, box are -
i) Noise generated from wheels.
ii) Noise generated due to metal to metal contact between tool box and tool box carrier.
iii) Noise generated due to impact of tools with tool box compartment surface.
iv) Noise generated due to impact of tools with each other.
PRIOR ART:
US patent 6736265 teaches a bout a general purpose mechanic's tool box that is able to with stand external environmental conditions and abuse. Typically a tool box includes a main body having front and top cover. Tubular gaskets run between front
31 MAR 2009

covers and the body, thereby providing a water tight seal. The body is typically constructed of a high durability plastic. The tool box can be closed and latched with a mechanism that can optionally be locked.
US patent 5988658 teaches about a carrier for a work box or tub includes a support ring made from opposed connected braces with telescopic handle attached at one end and wheels attached at the opposite end of the support ring.
US patent 4717020 teaches about a tool box receptacle with a sloped face typically inclined to horizontal with a preferred slope and containing a series of compartments inside, specifically designed for holding tools and materials of various sizes; the series of compartments may be removable; the compartments recede into a sloped fashion, but not necessarily with the same slope as the terminating margins of the receptacle. This design facilitates use by a user since all the tools in the sloped compartment can be seen at once and may be stored more easily. The too box many contain top wedge shaped nesting section which slides along a a flange sloped face of the lower section of the tool box assisted by longitudinal slots in the flanges of the bottom section and corresponding slots in the top wedge shaped section. The receptacle in its preferred from is made from metal or plastic and may include folding wheels and support frame work.
The above mentioned patents primarily aim at providing a new tool storage box which provide better space utilization, ease f storage etc. The common problem faced during the use of tool box is noise generated during transportation of the tool box. Similarly, the other associated problems are damage to the tools due to collision with each other and with the tool box body. These points are not addressed by the above mentioned patents. The present patent primarily aims at reducing the noise and collision of tools contained within the tool box.
31 MAR 2009

OBJECTS OF INVENTION:
• The main object of this invention is to obviate the aforementioned drawbacks by providing silent toolbox on wheels which produces less noise during transportation / movement.
• Yet another object of this invention is to provide the design modifications in the existing tool box to reduce the noise during its transportation.
• Yet another object of this invention is to provide an arrangement that can be retrofitted on existing tool boxes.
• Yet another object of this invention is to provide an add-on arrangement that is simple and cost effective.
SUMMARY OF INVENTION:
The present invention aims at providing a carrier arrangement and other design improvements to a normal tool box to reduce the noise generated during its transportation on road. It primarily aims at providing a tool box carrier which suitably houses the tool box. A rubber gasket is provided between the tool box and its carrier. The gasket reduces the transmission of the vibrations and jerks to the toolbox. The gasket is designed in such a way that the tool box is press fitted into the gasket and the gasket is always in compression. A rubber or sound dampening sheet is provided in each compartment which greatly reduces the noise generated by the impact of the tolls with the tool box body. An elastic strap is provided to clamp the tools in toolbox compartment. Larger diameter wheels are provided to the tool box carrier so that it can easily travel over the shop floor irregularities.
BRIEF DESCRIPTION OF DRAWINGS
In accordance to the present invention
Figure 1 shows the constructional details of the conventional general mechanic's tool
box with its carrier.


Figure 2 shows the constructional details of the tool box in accordance with the
present invention.
Figure 3 shows the constructional details of the wheel in accordance with the present
invention.
Figure 4 shows the internal constructional details of the tool box compartment in
accordance with the present invention.
DESCRIPTION OF PREFFERED EMBODIMENTS:
Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same
The sketches showing details of the arrangement silent tool box are given herewith. As shown in figure 1 the general mechanic's tool box comprises of a foldable tool storage box (1) placed on a tool box carrier (2). The tool box carrier is a made up of a steel angle and wheels (3) are attached to the tool box carrier. A handle / cable (4) is attached to the tool box carrier (2) to facilitate its transport along with the tool box.
As shown in fig. 2 the modified tool box in accordance with the present invention comprises of a tool box (1) placed into the tool box carrier (2). A rubber gasket (11) is placed between said tool box (1) and the tool box carrier (2) . The rubber gasket is having the shape similar to that of carrier. In place of rubber gasket other shock absorbing/ sound dampening gaskets can also provided. The sizes of tool box carrier and the gasket are such that, the rubber gasket (11) is always in compression. This arrangement reduces the lateral and vertical movement of the tool box during jerks. The rolling wheels (12) with rubber / Teflon or other such periphery with increased diameter are also are used to decrease the possibility of small vibrations to be transmitted to the toolbox.
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As shown in figure 3 the tool box wheel assembly comprises of a steel channel (31). The steel channel houses the wheel (12). The rolling wheels are preferably having rubber / Teflon on its outer periphery. A small sized rubber bush (32) is used for mounting the runner wheels this also reduces the transmission of the road jerks to wheels. The wheel is clamped to the channel through mounting bolts. The wheel assembly along with the channel is attached to the frame (2).
As shown in figure 4 the internal construction of a tool box comprises of a thin sheet of sound dampening material (41) placed in each compartment of the tool box (42). At least one elastic strap (43) is also provided to keep the tools in place and avoid its collision with each other during normal impact or jerk.
The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof.
Dated this 31st day of March 2009

TATA MOTORS LIMITED By their Agent & Attorney

Karuna Goleria of DePENNING & DePENNING