FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003


COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION
Vertical Muffler Mounting Structure for vehicles
APPLICANTS
TATA MOTORS LIMITED, an Indian company
Having its registered office at Bombay House,
24 Hoini Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
INVENTORS
Mr. Vivek Dwivedi, Mr. Rahul M. Pathak
And Mr. Sachin H. Kadu
All are 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
The present invention is related to exhaust system of vehicle and more particularly it relates to vertical muffler mounting structure for vehicles .
BACKGROUND OF THE INVENTION
Various mounting constructions have been employed to support the muffler of the vehicle at a predetermined position on the vehicle chassis behind the vehicle cabin to permit easy installation and easy serviceability. Generally, these mountings are secured to the support structure rearward of the vehicle body or chassis such as on right side long member or on the left side long member. These structures are generally fabricated or cast C -channel or bracket which is mounted on chassis vertically.
Conventional muffler mountings suffers from reduced ground clearances of the vehicles particularly for mining application vehicles which are more prone to stone hitting which damages the muffler system and these constructions add on weight of vehicle and having less rigid structure.
OBJECT OF INVENTION
The main object of the present invention is provide muffler mounting structure for a vehicle
Another object of the present invention is to provide muffler mounting structure for a vehicle which increases ground clearance of the vehicle particularly for mining application.
Another object of the present invention is to provide muffler mounting structure for a vehicle with reduce weight and is rigid structure
Another object of the present invention is to provide muffler mounting structure for a vehicle which is having less no. of fasteners.
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Another object of the present invention is to provide muffler mounting structure for a vehicle which is simple in construction and cost effective.
Another object of the present invention is to provide support for tail pipe on the vehicle which is required because of its overhang and weight.
Another object of the present invention is to provide support for fender mounting on the twin front axle vehicle.
SUMMARY OF PRESENT INVENTION
In accordance with this invention , The vertical Muffler mounting structure comprises;
Box assembly, at least two cylindrical members(7,8) inserted on said box assembly, at least two C-brackets (6,10) inserted on the said cylindrical members at the middle and top position, at least two support plates (9) connected to the said C-brackets, first sub-assembly bracket (11) mounted on top of said C-bracket (10), second sub assembly connected to the rear side of the said C-bracket (10 ) to provide support to the whole muffler structure.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 shows the exploded view of the muffler and the mounting structure.
Figure 2 shows the front view of the muffler mounting structure.
Figure 3 shows the side view of the muffler mounting structure.
Figure 4 shows the isometric view of the muffler mounting structure.
Figure 5 shows muffler is clamped on muffler mounting structure.
Figure 6 shows tail pipe of the muffler is supported from the muffler mounting
structure.
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DETAILED DESCRIPTION OF THE INVENTION
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.
Now referring to the figure-01-05, in accordance with this invention, The vertical Muffler mounting structure comprises;
Box assembly, at least two cylindrical members(7,8) inserted on said box assembly, at least two C-brackets (6,10) inserted on the said cylindrical members at the middle and top position, at least two support plates (9) connected to the said C-brackets, first sub-assembly bracket (11) mounted on top of said C-bracket (10), second sub assembly comprising of stay rod and bracket member (13) and bracket (14) is connected to the rear side of the said C-bracket (10 ) to provide support to the whole muffler structure.
Said Box assembly having bottom plate (1) ,front plate (2), bushes or spacers (3), rear plate (4) and top plate (5) . said box assembly is made after connecting all box assembly components together to form box like structure. Said top plate (5) comprises four weld nuts welded from bottom side of said plate for providing supports to twin steered axle front fender.
Said two C-Brackets (6 and 10) are mounted by inserting it to the said cylindrical members (7,8) at the top and middle position. Two support plate (9) are mounted by welding it to the said c-brackets (6 and 10) at the space provided therein. The said two C-brackets (6,10) are welded to the pipes (7 and 8); bracket 6 is welded in the middle portion of the said cylindrical member and bracket (10) is mounted by welding to the top of the said cylindrical members (7,8); the said C- bracket (6) is inserted on the said cylindrical members (7,8) up to middle portion and welded on top side of top flange and bottom side of bottom flange. The said C-bracket (10) in mounted by inserting it on top portion of said cylindrical members (7,8)
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and welded to it at bottom side of bottom flange and bottom side of top flange. The said cylindrical members (7,8) are then inserted in to the said box assembly and it is welded to the top and sides of the said box assembly, said first sub assembly (11) is mounted on top of said C-bracket (10) by welding for integrated support to the tail pipe from this structure; Now the Muffler mounting structure is ready for the fitment on the chassis, said muffler mounting structure is fitted on the chassis of vehicle with the help of holes provided on the said front plate of said box assembly and bushes or spacers provided therein. Second sub-assembly comprising stay rod (12), bracket member (13), and bracket (14). Said stay rod (12) is provided on the chassis to support the overhang mass of the structure. At the top portion of said structure, said stay rod is clamped on the top side with the bracket (13) which is attached to said C- bracket (10) and on the bottom side of stay rod (12) is mounted on the chassis with help of bracket (14).
Figure 5 shows a muffler (M) vertically mounted onto the muffler mounting structure according to this invention. The muffler is placed in the curvature portion of support plates (10) and is held firmly by strapping means (S). The muffler is positioned and strapped such that there is very less or no lateral or longitudinal movement of the muffler.
Figure 6 shows the tail pipe (T) of the muffler mounted in the aperture provided in
the top portion of the vertically mounted muffler to allow exhaust gases to escape
into the atmosphere. •
In accordance of this invention, method of assembly comprising the step of
• Preparing the box assembly,
• Inserting the said cylindrical members (7,8) on the said box assembly,
• Inserting the first C-bracket (6) on the said cylindrical members up to the middle portion and welded on the top side of top flange and bottom side of bottom flange of said bracket(6),
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• Inserting top C-bracket in the cylindrical members and welded on bottom side of bottom flange and bottom side of top flange of said bracket (10),
• Connecting said two support plates (9) to the said C-brackets (6 and 10) respectively,
• Fitting the sub-assembly bracket (11) on top of said C bracket (10),
• Fitting whole muffler mounting structure on chassis of vehicle with the help of holes provided on said front plate of said box assembly,
• Attaching another sub-assembly comprising of bracket (13), stay rod (12) and bracket (14) to the rear side of said C-bracket (10) with the help of bracket (13).
ADVANTAGES
Weight of the system is less by 50% compared to similar structures. Since the parts used for mounting of the muffler do not have any replaceable components, all the components are designed so as to last the life of the vehicle. In addition to this cost of the muffler mounting system is lower. The construction of the muffler mounting system is simple yet aesthetically better and cost effective for the vehicle to suit. Same system gives the support to the tail pipe as well minimizing the no of supports required for holding tail pipe on such a high position.
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WE CLAIM
1) A Vertical Muffler mounting structure comprising:
a box assembly;
at least two cylindrical members inserted on said box assembly;
at least two bracket members inserted on said cylindrical members at the middle and top position;
at least two support plates connected to said -bracket members,
a first sub-assembly bracket connected to said bracket member mounted on top position of said cylindrical members; and
a second sub assembly connected to the rear side of said bracket member mounted on top position of said cylindrical members to provide support to said muffler structure.
2) Vertical Muffler mounting structure as claimed in claim 1 wherein said box assembly comprises a bottom plate, a front plate, spacer elements, a rear plate and a top plate, which are fastened together to form a box like structure.
3) Vertical Muffler mounting structure as claimed in claim 2 wherein said top plate comprises four weld nuts welded from bottom side of said plate for providing supports to twin steered axle front fender.
4) Vertical Muffler mounting structure as claimed in claim 1 wherein said muffler mounting structure is fitted on chassis of vehicle with the help of holes provided on the said front plate of said box assembly with spacer elements provided therein.
5) Vertical Muffler mounting structure as claimed in claim 1 wherein said second subassembly comprises a stay rod clamped on one side to a chassis-mounting bracket member to mount on vehicle chassis and attached on the other side to said bracket member mounted on top position of said cylindrical members.
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