FORM 2
THE PATENT ACT 1970
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. TITLE OF THE INVENTION:
"Mounting Hole Guard for Providing IP Protection"
2. APPLICANT:
(a) NAME: Larsen & Toubro Limited
(b) NATIONALITY: Indian Company registered under the
provisions of the Companies Act-1956.
(c) ADDRESS: LARSEN & TOUBRO LIMITED,
L&T House, Ballard Estate, P. 0. Box: 278, Mumbai 400 001, India
3. PREAMBLE TO THE DESCRIPTION:
COMPLETE
The following specification particularly describes the invention and the manner in which it is to be performed.

Mounting Hole Guard for Providing IP Protection
Field of invention
The present invention relates to distribution boards used for domestic as well industrial purposes particularly in Low Voltage (LV) domain, more particularly, the present invention relates to mounting hole guard for IP Protection of Distribution Boards / Enclosures for LV Systems.
Background of the invention
Distribution Boards / Enclosures are popularly used to mount all varied varieties of Modular Devices inside it. Distribution Boards are of 3 types:
1) Panel Boards
2) SMDB (Sub Main Distribution Boards)
3) FDB (Final Distribution Boards)
At present, the mounting hole guard used are not adequate to prevent mortar / dust / liquid to seep inside the distribution boards. Most of the competitors are not offering Key Hole guards at all which will be dangerous in case mortar / dust / cement seeps inside distribution boards during time of mounting which can affect the product performance.
The mounting hole guard does not prevent dust to seep in during time of installation. The mounting hole guard does not prevent mortar entry at time of installation.
Therefore, there is a need to provide a mounting hole guard which over comes all drawbacks of the prior art.

Objects of the invention
Object of the present invention is to provide a mounting hole guard for providing IP Protection.
Another object of the present invention is to provide a mounting hole guard, which prevents to seep in during time of installation.
Yet another object of the present invention is to provide a mounting hole guard, which prevent mortar entry at time of installation.
Summary of the invention
According to the present invention there is provided a mounting hole guard for providing IP protection, the mounting hole guard having a key hole guard and a box assembly. The key hole guard having locking limbs, flexible limbs, plurality of locking slots and a screw driver slot. The locking limbs is configured on a first surface of the key hole guard. The flexible limbs is projecting out from the first surface of the key hole guard. The locking slots are configured on a second surface of the key hole guard. The screwdriver slot is configured on a central portion of the second surface of the key hole guard. The box assembly having a key hole profile and a flexing limb hole profile both configured on a central portion thereof. Further, the locking limbs and the flexible limbs are assembled in the box assembly, and upon rotating the key hole guard for locking with the box assembly to configure mounting hole guard.
Brief description of drawings
Other features as well as the advantages of the invention will be clear from the following description.

In the appended drawings:
Figure 1 shows a front view of a mounting hole guard in accordance with the present invention;
Figure 2 shows a rear view of a mounting hole guard in accordance with the present invention;
Figure 3 shows a box assembly in accordance with the present invention;
Figure 4 shows a pre assembly of mounting hole guard with key hole in box assembly in accordance with the present invention;
Figure 5 shows the post assembly of mounting hole guard with key hole in Box;
Figure 6 shows an exploded view of box assembly with mounting hole guard, and
Figure 7 shows a final assembly on the mounting hole guard on the Distribution Boards.
Detail description of the invention
For a thorough understanding of the present invention, reference is to be made to the following detailed description, including the appended claims, in connection with the above-described drawings. Although the present invention is described in connection with exemplary embodiments, the present invention is not intended to be limited to the specific forms set forth herein. It is understood that various omissions and substitutions of equivalents are contemplated as circumstances may suggest or render expedient, but these are intended to cover the application or implementation without departing from the spirit or scope of the claims of the present invention. Also, it is to be understood that the phraseology and

terminology used herein is for the purpose of description and should not be regarded as limiting.
The present invention provides a mounting hole guard for providing IP Protection. Further, the mounting hole guard, which prevents to seep in during time of installation. Moreover, the mounting hole guard, which prevent mortar entry at time of installation.
Further, any FDB (Final Distribution Board) can be mounted in 2 states only:
1) Inside the wall (Flush mounting), and
2) Outside the wall (Surface mounting).
The present invention is used only for case No. I (Flush Mounting). Most of the industry wide there is a norm that the same Distribution Board / Enclosure has to be used as depending on the site conditions the customer has the flexibility to go for which ever type of mounting he wants to opt for. It is a common industry wide practice to make a common design which is suitable for both type of mounting.
Figures 1-7 shows various views and elements of a mounting hole guard (herein after referred as guard) in accordance with the present invention. The guard includes a key hole guard (1) and a box (3). The key hole guard (1) having locking limbs (la), flexing limbs (lb), locking slots (lc) and slot for screwdriver (1d). The box assembly (3) having a two side Key Hole profile (2) and Flexing limb hole profile (2a). The Mounting Hole Guard is assembled on the Box and the rectangular profile (1d) of Mounting Hole Guard (Fig. 2) is rotated by 40° using a screw driver. The Box Assembly (3) has an embossing of 5 mm almost, this is required incase the Box Assembly (2) is going to be mounted on wall.
The Key Hole guard (1) is fixed with Box Assembly (5) as shown in Fig. 5. The locking limbs (la) and flexing limbs (lb) are assembled inside the Box Assembly Profile (2) as shown in Fig.4. The Key hole guard (1) is then rotated inside the slot of Box Assembly (3) by almost 40° with the help of screw driver slot (1d) to reach

its final locked position as shown in Fig 5. The whole assembly is possible because of the special slot provided in mounting hole (2a) and the Flexing Limb (lb) which makes the whole assembly possible. This assembly is very quick and feasible for Mass production. Since the locking limbs (la) cover the box key hole profile (la) completely (Fig 5) there is no chance for dust or mortar to seep inside the Enclosure / Distribution Board thereby preventing it from IP.
The assembly is designed to cater Surface / Flush Construction. This assembly can be used all across Distribution Boards/Enclosure (FDB) complete range.
The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the present invention and its practical application, and to thereby enable others skilled in the art to best utilize the present invention and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omissions and substitutions of equivalents are contemplated as circumstances may suggest or render expedient, but such omissions and substitutions are intended to cover the application or implementation without departing from the spirit or scope of the claims of the present invention.

We Claim:
1. A mounting hole guard for providing IP protection, the mounting hole
guard comprising:
a key hole guard having,
a locking limbs configured on a first surface of the key hole guard, a flexible limbs projecting out from the first surface of the key hole guard,
a plurality of locking slots configured on a second surface of the key hole guard, and
a screwdriver slot slots configured on a central portion of the second surface of the key hole guard; and
a box assembly having a key hole profile and a Flexing limb hole profile both configured on a central portion thereof, wherein the locking limbs and the flexible limbs are assembled in the box assembly, and upon rotating the key hole guard for locking with the box assembly to configure mounting hole guard.
2. The mounting hole guard as claimed in claim 1, wherein the box assembly having a embossing for mounting on a wall.
3. The mounting hole guard as claimed in claim 1, wherein the key hole guard is rotated by 40 degrees angle for locking with the box assembly to configure mounting hole guard,