DESC:FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
AND
The Patents Rules, 2003

COMPLETE SPECIFICATION
(Section 10 and Rule 13)

TITLE
Noise Absorbing Floor Panel

APPLICANT
(a) BEML Limited,
(b) A Govt. of India Undertaking,
(c) BEML Soudha,
No 23/1, IV Main, Sampangiramanagar,
Bengaluru, Karnataka, India

PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed.
FIELD OF THE INVENTION
This invention relates to a noise absorbing floor panel. Particularly this invention relates to a noise absorbing honeycomb sandwich floor panel. The floor panel is useful for the partition of walls / roofs, doors, desks, cupboards, aesthetic decoration to alleviate noise attenuation.
STATE OF THE ART IN THE FIELD
The floor panels are generally made of plywood which are solid boards, heavy in weight, poor resistant to permeability and less impact damping. When the floor covering installed on the plywood floor panels is removed it damages the plywood panels. Therefore complete plywood panel is to be replaced with new floor panel. Also, some of the existing floor panels are made of plywood coated with fire resistant material.
There are disadvantages associated with the conventional floor panels. One of the disadvantages associated with the conventional floor panels is that these floor panels are solid boards and therefore are heavy in weight.
Another disadvantage associated with the conventional floor panels is that the conventional panels has poor resistance to the permeability.
Yet another disadvantage associated with the conventional floor panels is that these panels are less impact damping.
Still another disadvantage associated with the conventional floor panels is that the removal of floor covering damages the plywood board. So the complete floor board is to be replaced with new board.
A further disadvantage associated with the conventional floor panels is that the floor panels are made of plywood and the plywood’s are highly reactive to the environment.
Another disadvantage associated with the conventional floor panels is that the floor panels are made of plywood and the plywood’s are expensive in nature.
Yet another disadvantage associated with the conventional floor panels is that the floor panels are made of plywood and the plywood’s have very high maintenance.
Still another disadvantage associated with the conventional floor panels is that for the structural & airborne noise absorption, separate noise absorption material is applied in the rolling stock underframe.
A further disadvantage associated with the conventional floor panels is that the floor panels are made of plywood and the plywood’s are poor resistance to fire barrier.
OBJECTS OF THE INVENTION
Therefore an object of the present invention is to provide a noise absorbing floor panel which obviates the disadvantages associated with conventional floor panels.
Another object of the present invention is to provide a noise absorbing floor panel which is light in weight.
Yet another object of the present invention is to provide a noise absorbing floor panel which is resistant to permeability.
Still another object of the present invention is to provide noise absorbing floor panels which alleviate noise attenuation.
A further object of the present invention is to provide noise absorbing floor panels which are easy to install.
Another object of the present invention is to provide noise absorbing floor panels which are fire resistant.
Yet another object of the present invention is to provide noise absorbing floor panels which are in the shape of honeycomb sandwich panel with integrated noise absorber.
Still another object of the present invention is to provide noise absorbing floor panels which, on removal of floor covering, does not damage the floor panel.
A further object of the present invention is to provide noise absorbing floor panels which are highly resistant to environment.
Another object of the present invention is to provide noise absorbing floor panels with high resistance fire barrier.
SUMMARY OF THE INVENTION
According to this invention there is provided a noise absorbing floor panel comprising a honeycomb structure cladded with a metallic sheet, a noise absorber structure being placed in partition provided in the panel, hard material being provided at all edges of the floor panel so as to provide stability to the panel, hard material being also provided at all such places where passenger handholds are to be fixed.
BRIEF DESCRIPTION OF THE DRAWINGS
A noise absorbing floor panel, according to a preferred embodiment of the present invention, is herein described and illustrated in the accompanying drawings, wherein:
Figure 1, illustrates plan view of the noise absorbing floor panel,
Figure 2, illustrates cross-sectional view of the noise absorbing floor panel,
DETAILED DESCRIPTION OF THE INVENTION
A noise absorbing floor panel is herein described with numerous specific details so as to provide a complete understanding of the invention. However these specific details are exemplary details and should not be treated as the limitation to the scope of the invention. Throughout this specification the word “comprise” or variations such as “comprises or comprising”, will be understood to imply the inclusions of a stated element, integer or step, or group of elements, integers or steps, but not the exclusions of any other element, integer or step or group of elements, integers or steps.
Referring to the drawings, figures 1 and 2, plan view and elevational view of the noise absorbing floor panel are shown. The floor panel (1) comprises a honeycomb structure (2) cladded with a metallic skin / sheet (3) (see figure 2). The honeycomb structure (2) is made of a metal, for example, aluminium. Also, the metallic skin / sheet is made of aluminium. A noise absorber structure (4) is placed in the partition (5) provided in the panel (1). The noise absorber structure (4) is made of, for example, cellular cushion rubber or rigid foam or any other like material. Hard material (6), for example, aluminium block / extrusion or phenolic composite or a similar hard material is provided at all edges of the floor panel (1) so as to provide stability to the panel (1). Also, hard material (6) is provided at all such places where passenger handholds (not shown) are to be fixed to provide support to the passengers.
The noise absorbing floor panel of the present invention are capable to withstand passenger load and stamping load. Also, the floor panel of the present invention meets the fire safety requirements as per EN 45545. Further, the noise absorbing floor panel of the present invention has noise attenuation to > 24dB. With floor covering noise attenuation to be >28dB.
Certain features of the invention have been described with reference to the exemplary embodiments. However, the description is not intended to be construed in a limiting sense. Various modifications of the exemplary embodiments as well as other embodiments of the invention, which are apparent to the persons skilled in the art to which the invention pertains, are deemed to lie within the spirit and scope of the invention.
,CLAIMS:WE CLAIM:
1. Noise absorbing floor panels comprising a honeycomb structure (2) cladded with a metallic sheet (3), a noise absorber structure (4) being placed in partition (5) provided in the panel (1), hard material (6) being provided at all edges of the floor panel (1) so as to provide stability to the panel (1), hard material (6) being also provided at all such places where passenger handholds (not shown) are to be fixed.

2. The noise absorbing floor panels as claimed in claim 1, wherein the honeycomb structure is made of a metal, for example, aluminium or like hard material.

3. The noise absorbing floor panels as claimed in claim 1, wherein the metallic skin / sheet is made of a metal, for example, aluminium or like hard material.

Dated this 12th day of February, 2020

R. P. Yadav
of sr4ipr Partners
Applicant’s Attorney