Description:FORM 2

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

COMPLETE SPECIFICATION
(See section 10, rule 13)

“VERTICAL BRACKET/ EXTRUSION HOLDER”

By

SUDHA VENTILATING SYSTEMS PRIVATE LIMITED
AN INDIAN COMPANY
B-85, MIDC, AHMEDNAGAR – 414111, INDIA

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 roof ventilator, and in particular to a type of roof ventilator known as a turbine roof ventilator. More particularly, a component used in wind driven turbine / turbo rooftop ventilators.

Background of the Invention
With the rapid development of economy, the shortage of fossil fuels such as coal and oil is increasing. The consumption of non-renewable energy source threatens seriously the development of human beings. Furthermore, the utilization of conventional fuels results in a series of environmental pollution, greenhouse gas emission which constrains social and economic development.
Turbine ventilators are widely used for under-roof ventilation in domestic, commercial and industrial applications. Their popularity stems largely from a relatively modest purchase cost coupled with a substantial absence of any operating cost and ability to operate without regulation. That is, the primary purpose of the turbine ventilator is to exhaust under-roof accumulation of hot air either internally generated or as a result of sun load on the roof. For that purpose, a precise quantity of air flow need not be maintained continuously but can instead be permitted to fluctuate within a wide range.
Existing arrangement to hold the rotating head of the turbine and also to connect it to the neck / throat of the ventilator using vertical extruded / sheet metal parts needs to be welded / riveted which causes dimensional inaccuracies to build into the design. Also, another arrangement using horizontally placed extruded / sheet metal parts reduces the movement of air into the rotating head by reducing the available cross-sectional area of the neck / throat of the ventilator. This directly affects the performance of the wind ventilator by reducing air flow through the turbine head.
It is an object of the present invention to provide improvements to turbine roof ventilators which increase their efficiency and usefulness. These and other advantages of the invention, as well as additional inventive features, will be apparent from the description of the invention provided herein.

Summary of the Invention
The inventive concepts presented herein are illustrated in a number of different embodiments, each showing one or more concepts, though it should be understood that, in general, the concepts are not mutually exclusive and may be used in combination even when not so illustrated.
Accordingly, in one aspect of the present invention provides a vertical bracket/ extrusion holder. The holder includes a structure housing defining an axial opening in which spindle is received, the structure housing including a plurality of projection tabs spaced apart which is disposed about the periphery thereof. The plurality of projection tabs to secure the structure housing with the static shaft of the rotating wind turbine head, wherein the plurality of projection tabs also holds the vertical extruded or sheet metal brackets which connect the subject component to the sheet metal or plastic neck / throat of the ventilator.
Accordingly, in another aspect of the present invention provides a wind driven ventilator including a base adapted for surface mounting about an aperture through which a ventilating air flow is to be induced. A wind responsive turbine head disposed for rotation about an axis, an elongated spindle or shaft coaxially disposed within said turbine head and a supporting component of the turbine head for rotation relative to said base. The supporting component including a structure housing defining an axial opening in which said spindle is received, said structure housing including a plurality of projection tabs spaced apart which is disposed about the periphery thereof, where the plurality of projection tabs to secure the structure housing with the static shaft of the rotating wind turbine head, wherein the plurality of projection tabs also holds the vertical extruded or sheet metal brackets which connect the subject component to the sheet metal or plastic neck / throat of the ventilator.
To further clarify advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended figures. It is appreciated that these figures depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. Other aspects, objectives and advantages of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

Brief description of the drawings
The accompanying drawings incorporated in and forming a part of the specification illustrate several aspects of the present invention and, together with the description, serve to explain the principles of the invention. In the drawings:
FIG. 1 shows a typical design in a wind driven ventilator.
FIG. 2 shows a novel vertical bracket/ extrusion holder which is used in wind driver ventilators, according to one embodiment of the present invention.
While the invention will be described in connection with certain preferred embodiments, there is no intent to limit it to those embodiments. On the contrary, the intent is to cover all alternatives, modifications and equivalents as included within the spirit and scope of the invention as defined by the appended claims. Further, skilled artisans will appreciate that elements in the figures are illustrated for simplicity and may not have necessarily been drawn to scale. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the figures by conventional symbols, and the figures may show only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the figures with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

Detailed description of the Invention
Referring to the drawings. FIG. 2 shows a schematic view of a turbine roof ventilator embodying the present invention. The roof ventilator includes a turbine hood or rotor head which is mounted on a shaft. The shaft is rotatably mounted in a bearing housing on upper bearings and lower bearings. The upper and lower bearings are preferably made of steel having a steel inner ring and a steel outer ring separated by a race of ball bearings. The shaft extends upwardly beyond the upper bearings as far as the top of the turbine hood.
Four arms extend away from the bearing housing in a cruciform configuration support the bearing housing and turbine hood above a cylindrical sleeve through which hot air is to be drawn, in use. The turbine hood includes a roof or cover portion. a lower ring and a series of blades typically about twenty-four in number, which extend between the cover portion and the lower ring. At the base of each blade there is a depending projection which snap fits into a corresponding recess in the lower ring.
FIG. 1 shows a typical arrangement of the turbine roof ventilator, where the shaft and the bearing housing arrangement are connected to the neck of the wind ventilator, in which flat aluminium extrusion is extended along with bearing housing and fixed at the neck of the wind ventilator. Due to this type of conventional arrangement to holds the rotating head of the turbine and also to connect it to the neck / throat of the ventilator using vertical extruded / sheet metal parts needs to be welded / riveted which causes dimensional inaccuracies to build into the design. Also, another arrangement using horizontally placed extruded / sheet metal parts reduces the movement of air into the rotating head by reducing the available cross-sectional area of the neck / throat of the ventilator. This directly affects the performance of the wind ventilator by reducing air flow through the turbine head.
Referring to FIG. 2 shows a novel and inventive structure housing (i.e. a vertical bracket / extrusion holder) address the technical problem faced by the conventional ones as shown in FIG. 1. The novel and inventive structure housing defines an axial opening in which a spindle or shaft may be received. The structure housing has a plurality of projection tabs spaced apart which is disposed about the periphery thereof. The structure housing is coupled to or positioned with vertically held aluminium extrusion which is further positioned with neck of wind ventilator. In an embodiment, the tabs are tapered substantially near the core of the shaft. Due to this type of construction and arrangement, the projection tabs are capable of securing the structure housing with the static shaft of the rotating wind turbine head. The plurality of projection tabs also holds the vertical extruded or sheet metal brackets which connect the subject component to the sheet metal or plastic neck / throat of the ventilator.
In an embodiment, the plurality of projection is made up of plastic or its variants and it is moulded into shape by injection moulding or equivalent process in a single or segmented arrangement. Further, the projection tabs have an arc arm extending outward from said structure housing and providing a spring resilience for imposing said gripped engagement.
In another embodiment, the plurality of projection tabs allows better ventilator performance by increased air flow through the ventilator turbine head.
In yet another embodiment of the present invention, the plurality of projection tabs reduces assembly time as the throat / neck assembly involves far lesser number of components or manufacturing steps and thereby lowers the cost of throat / neck assembly.
In another embodiment of the present invention, the plurality of projection tabs allows better resistance to environmental conditions by eliminating plating as a process. Further, the plurality of projection tabs has better functional performance which makes it very cost effective.
All references, including publications, patent applications, and patents cited herein are hereby incorporated by reference to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth in its entirety herein.
The use of the terms "a" and "an" and "the" and similar referents in the context of describing the invention (especially in the context of the following claims) is to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms "comprising," "having," "including," and "containing" are to be construed as open-ended terms (i.e., meaning "including, but not limited to,") unless otherwise noted. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.
Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. Variations of those preferred embodiments may become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise indicated herein or otherwise clearly contradicted by context.

Reference Numerals
SHAFT 01
FLAT ALUMINIUM EXTRUSION 02
NECK OF WIND VENTILATOR 03
TABS 04
VERTICALLY HELD ALUMINIUM EXTRUSION 05

, Claims:We Claim:

1. A vertical bracket/extrusion holder, comprising:
a structure housing defining an axial opening in which spindle is received, the structure housing including a plurality of projection tabs spaced apart which is disposed about the periphery thereof;
wherein the plurality of projection tabs to secure the structure housing with the static shaft of the rotating wind turbine head, wherein the plurality of projection tabs also holds the vertical extruded or sheet metal brackets which connect the subject component to the sheet metal or plastic neck / throat of the ventilator.

2. The holder as claimed in claim 1, wherein the plurality of projection is made up of plastic or its variants and it is moulded into shape by injection moulding or equivalent process in a single or segmented arrangement.

3. The holder as claimed in claim 1, wherein the projection tabs have an arc arm extending outward from said structure housing and providing a spring resilience for imposing said gripped engagement.

4. The holder as claimed in claim 1, wherein the plurality of projection tabs allows better ventilator performance by increased air flow through the ventilator turbine head.

5. The holder as claimed in claim 1, wherein the plurality of projection tabs reduces assembly time as the throat / neck assembly involves far lesser number of components or manufacturing steps and thereby lowers the cost of throat / neck assembly.

6. The holder as claimed in claim 1, wherein the plurality of projection tabs allows better resistance to environmental conditions by eliminating plating as a process.

7. The holder as claimed in claim 1, wherein the plurality of projection tabs has better functional performance which makes it very cost effective.

8. The holder as claimed in claim 1, wherein the projection tabs are tapered and are positioned substantially near to the core of the shaft.

9. A wind driven ventilator comprising, comprising:
a base adapted for surface mounting about an aperture through which a ventilating air flow is to be induced;
a wind responsive turbine head disposed for rotation about an axis;
an elongated spindle or shaft coaxially disposed within said turbine head; and
a supporting component of the turbine head for rotation relative to said base, the supporting component including:
a structure housing defining an axial opening in which said spindle is received, said structure housing including a plurality of projection tabs spaced apart which is disposed about the periphery thereof;
wherein the plurality of projection tabs to secure the structure housing with the static shaft of the rotating wind turbine head, wherein the plurality of projection tabs also holds the vertical extruded or sheet metal brackets which connect the subject component to the sheet metal or plastic neck / throat of the ventilator.