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
PROVISIONAL SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
Self Ventilating Fan for Automobiles
APPLICANTS
Name: Crompton Greaves Limited,
Nationality: an Indian Company
Address: CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra,
India,
INVENTORS
Qutbuddin Siddiquee and Obla Krishnamoorthy Amar Babu, both of Crompton Greaves Ltd , IPR Cell, Technical Information Centre (TIC), CG Global R&D Centre, Kanjur (E), Mumbai 400042, Maharashtra, India, both Indian Nationals
PREAMBLE TO THE DESCRIPTION
The following specification describes the invention:

FIELD OF INVENTION
This invention relates to a self-ventilating fan for an automobile.
BACKGROUND OF INVENTION
Automobiles employ two types of comfort level for the passengers while traveling. One is making a controlled atmosphere by Air conditioning, while the other is to have open access to the air by way of opening up the window-door directly so that while moving ahead, the resisting / dragging force of air is made to comfort the passenger and the other way. At times, we need limited airflow inside the automobile or more free air needed in the legroom.
Conventional automobile do not have any provision to limit the volume of airflow into the automobile. Other provision available in early stage model cars employ a swingable glass door on the front door, thereby directly exposing to the incoming air by halfway open. This has the drawback of unsafely and directly exposing the glass hence, allowing uncontrolled airflow with dust allowed in. This causes uncomfortable to the driver and the passengers sitting in the front row. The Japanese patent application JP 2004262420 teaches how such a blade fan can be employed so ads to take in the wind while, the car moving to comfort inside of the automobile. The Korean patent application KR 20030033781 teaches ventilating indoor air of the automobile to the outside by employing a fan operated by a battery. US Patent 6030285 teaches a method of exhaustion of automobile interiors by providing an assembly consisting of a fan blade, a channel for passage of air and a circular door rotate ably opened or closed, which exhaust inside heat into the atmosphere. All these patents teach exhausting i.e., ventilating inside air to outside air. None of the patent addresses the need of controlled air admittance into the automobile, which will, not only make more comfortable to the passengers but also keep the ambience of the interior, not overheated, in hot places or during summer. Hence, there is a need of a
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simple arrangement for controlled airflow into the automobile, without being operated by a battery, can possibly placed conveniently and preferably any of the side doors of automobile.
An object of the invention is to provide a vertically mountable ventilating fan within the door of the automobile to allow a limited airflow from the atmosphere.
Another object of the invention is to provide a ventilating fan, which is self-operating utilizing the dragging air when the vehicle is moving.
Another object of the invention is to provide a slide able shutter in the arrangement which, when opened exposes the fan outside of the door partially facilitating the fan to rotate and allow controlled airflow inside; and when closed facilitates the fan to be retracted safely inside by a telescopic collapsible bar arrangement and further utilises a ball catch mechanism to hold the shutter either in open or closed condition.
Another object of the invention is to provide a slide able shutter in the arrangement which, when opened exposes the fan outside of the door partially facilitating the fan to rotate and allow controlled inside air to flow outside partially.
Another object of the invention is to provide a dynamo to be connected vertically below the shaft of the fan blade, which can generate a small amount of power, which also can either be saved in a battery to utilize at later or can be used to light up during night travel.
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Another object of the invention is to provide a perforated sheet in the inside of the automobile door, which allows only air and filtering out dust and big size particles from entering inside the automobile.
Another object of the invention is the flexibility of this arrangement, which facilitates accommodating at a suitable place within any of side doors of automobile
Another object of the invention is the provision for opening and closing is provided from both inside and outside of the automobile doors.
DESCRIPTION OF THE INVENTION
This invention addresses the requirement of controlled airflow inside or additional airflow in the legroom. This arrangement consists of a fan blade assembly, two telescopic collapsible means pivoted at the interior of the door and connected with shutter and fan blade shaft at both ends, a slide ably open able shutter and a perforated sheet in the inside part of automobile door. The fan consists of circularly mounted straight or curved blades on its periphery, and provided two bearings at its ends, which will be seated within predefined slots at both ends and also connected by a telescopic means just below the bearings at ends. A telescopic means is also collapsible type and when the shutter is opened, causing the rod to collapse thereby exposing the fan outside the door of the assembly. And when the user closes the shutter, the pipes expands one within another and hence retracts the fan within the arrangement. The shutter uses a plurality of ball catch mechanism is provided in the door to hold the shutter in either of open or close condition at its extreme positions.
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Also provided is a perforation at automobile interior to filter out only air and leaving behind other dust particles exterior to the automobile.
Another embodiment of this invention is to provide a connection between the shaft of the fan blade and a dynamo thereby utilizing the rotational energy obtained is converted into generating power. This power can be either saved in a small battery to utilize later or can be used for lighting during night travel.
In accordance to the present invention, a self-ventilating fan arrangement provided with doors of an automobile, consists of vertically mounted fan with bearings at both of its shaft ends, collapsible telescopic means pivoted in middle and connected with a door and fan shaft and a slideable shutter and perforated means to provide controlled air into an automobile.
In accordance to the present invention, the shaft of the self-ventilating fan arrangement is to hold blades on it s periphery, bearings at its both ends and a provision for connecting telescopic means adjacent to and but either below or above to the bearings.
In accordance to the present invention, the telescopic means is provided in a self-ventilating fan arrangement, is a collapsible type, which will expand or collapse for the purpose of the function decided for.
In accordance to the present invention, the blades of this self-ventilating fan arrangement, can be made of straight or curved configuration.
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In accordance to the present invention, a perforated means is provided in this self-ventilating fan arrangement, is to filter out only incoming air to ventilate the automobile leaving aside other dust particles.
In accordance to the present invention, a dynamo is provided with this self-ventilating fan arrangement, at the lower/upper end of the vertical fan shaft arrangement to generate electric power.

Dated this 30th day of March 2007
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