Title of Invention	A ROOF VENTILATOR
Abstract	ventilating factories, warehouses, workshops and houses. A roof ventilator includes dome, upper throat, lower throat, main shaft, D.C. drive motor, solar module. This device has centrally rotating main shaft and plurality of curved wings of which upper end and lower end securely attached to circular disc & circular strip respectively and spaced about the main shaft; and further includes solar panel securely mounted at desired * place. This device has provision to maintain r.p.m even in absence of wind or less wind as D.C. drive motor along with the solar module is connected at lower end of the main shaft through gears. Hence in the presence of sunlight and with low wind or in absence of wind, energy developed by solar module being transferred to D.C. motor which allows dome to spin.

Title of Invention

A ROOF VENTILATOR

Abstract

ventilating factories, warehouses, workshops and houses. A roof ventilator includes dome, upper throat, lower throat, main shaft, D.C. drive motor, solar module. This device has centrally rotating main shaft and plurality of curved wings of which upper end and lower end securely attached to circular disc & circular strip respectively and spaced about the main shaft; and further includes solar panel securely mounted at desired * place. This device has provision to maintain r.p.m even in absence of wind or less wind as D.C. drive motor along with the solar module is connected at lower end of the main shaft through gears. Hence in the presence of sunlight and with low wind or in absence of wind, energy developed by solar module being transferred to D.C. motor which allows dome to spin.

Full Text	FORM - 2 THE PATENTS ACT, 1970 COMPLETE SPECIFICATION [Section 10] 1. A ROOF VENTILATOR 2. (A) JASHWANTLAL NARANDAS SHAH (B) 2023/PH-lll, G.l.D.C, Vatva, Ahmedabad-382 445 Gujarat, India. (C) Nationality an Indian. The following specification particularly describes the nature of the invention and the manner in which it is to be performed. This invention relates to A roof ventilator. Factories, Warehouses, workshops, houses & even kitchens are frequently constructed without efficient natural ventilation system. Providing of doors and windows is not adequate since stale hot air does not disperse by itself. There are some conventional power consuming ventilation system available in the market such as exhaust fans, chimney for which electricity is required. Also Conventional Ventilators, which are based on the natural wind energy having a drawback of not functioning when wind stops and fails in providing the advantages of it. To overcome the above problem, A Roof ventilator is prepared incorporating solar & wind energy which increases its functionality in such a way that it works even in low or almost no wind. A Roof ventilator is characterized by a mechanical device operates through natural wind and/or solar energy. When fitted over the roof the lightest flow of wind rotates the dome of ventilator & the product 2 starts functioning and exhausts all the stale & polluted air inside the house or shed. As only natural energy is being used for-a device, there is no requirement of electricity and hence it becomes a maintenance free unit. This device has many advantages such as positive extraction of polluted air, improves productivity by reducing human stress, improves indoor air quality, reduces structural damages, human and environmentally friendly and works on natural energy such as wind and/or solar and hence no requirement of electricity. Therefore it is economical too. The present invention is described with greater specific and clarity with reference to the following drawings. Fig. 1 represents cross sectional view of Dome. Fig. 2 represents circular disc. Fig. 3 represents circular strip. Fig. 4 represents bottom section with main shaft. 3 Fig. 5 represents cross sectional view of Solar & natural Powered turbine roof ventilator. Fig. 6 represents roof Ventilator when it is connected with solar module. Dome 1 is made up of Aluminum/Galvanize/Polycarbonate curved wings 4. A roof ventilator is divided into top section 25 and bottom section 26. Top section 25 consists of Dome 1 and bottom section 26 consists of upper throat 2 & lower throat 3. Nick 21 separates bottom section 26 into upper throat 2 & lower throat 3. Each of the curved wings 4 has a first end 27, which is securely riveted to the top circular plate 5 and further has a second end 28, which is securely riveted to the circular strip 29.Dome 1 is balanced by connecting four no. of upper metallic supports 14,15,16 & 17. Outer end of upper metallic supports 14,15,16 &17 is riveted to the circular strip 29 and inner end of the upper metallic supports 14, 15,16 & 17 is riveted to the upper washer 12 & lower washer 13. Circular disc 5 has central hole 7 and 4 similarly both upper washer 12 and lower washer 13 have the central hole. Bottom section 26 is made up of combination of upper throat 2 and lower throat 3 for the purpose of changing the alignment depending on the slope of the roof. Bottom section 26 is balanced by connecting three no. of lower metallic supports 18,19 & 20. Inner end of the lower metallic supports 18,19 & 20 is connected to the nylon housing 22 by means of riveting and outer end of lower metallic supports 18,19 & 20 is connected to the upper throat 2 by riveting. Main shaft 6 passes through the circular disc 5, upper washer 12, lower washer 13 and nylon housing 22. Upper end of the main shaft 6 has threads to connect the Dome assembly 1 by means of bolt 30. Considering the bottom section 26 of roof ventilator, the main shaft 6 is fitted with two ball bearings in a nylon housing 26. Nylon and Teflon bush pass through the main shaft 6 and lying on the nylon housing 22. Gear 23 is connected to the lower end of main shaft 6 and the same is rotated by gear 11 of D.C. drive motor 8. Solar module 10 is 5 connected to the D.C. Motor 8 at point 24 via cable 9. In the presence of sunlight, as D.C. Motor 8 is connected with the solar module 10, energy developed by solar module 10 being transferred to D.C. Motor 8 which allows Dome 1 to spin via main shaft 6 [Fig.6]. A roof ventilator spins though wind and/or solar energy. A roof ventilator operated by utilizing the velocity energy of wind to induce airflow by centrifugal action. The centrifugal force caused by the curved wings 4 of dome creates a region of low-pressure area, which draws air out through this device. Air drawn out by this device continuously replaces fresh air from the outside. Once the hot air is removed from the building, a new cooler air will enter. Also as D.C. drive motor is connected with the main shaft through gears and hence r.p.m. can be maintained even during no wind or 9 low wind by utilizing energy generated from the solar module. 6 I claim: 1. A ROOF VENTILATOR consists top circular ring(5), bottom circular strip (29), curved wings (4), adjustable throat, main shaft(6), upper metallic supports (14,15,16&17) lower metallic supports (18,19,20) wherein (a) top circular ring (5) and bottom circular strip (29) are connected by main shaft; (b) upper end of main shaft is fitted in the top bearing housing and lower end of the lower bearing housing is fitted in the bottom bearing housing; (c) each curved wings (4) are separately riveted from the first end (27) to the top circular plate(5) and second end (28) of covered wing (4) is also separately rived to the bottom circular strip (29); (d)outer end of upper metallic supports (14,15,16 & 17) is rived to the circular strip (29) and inner end of upper metallic supports (14,15,16 & 17) is rived to the upper washer(12) and lower washer(13); (e) nick (21) separates upper throat (12) and lower throat (13); (f) inner end of the lower metallic supports (18, 19 & 20) is connected to the nylon housing (22) by means of riveting and outer end of the lower metallic supports (18,19 & 20) is connected to the upper throat (2) by riveting. 7 Statement of Invention: A ROOF VENTILATOR consists top circular ring (5), bottom circular strip (29), curved wings (4), upper throat (2), lower throat (3), main shaft (6), upper metallic supports (14, 15, 16 & 17), lower metallic supports (18, 19 & 20) wherein top circular ring (5) and bottom circular strip (29)are connected by main shaft(6) where the upper end of main shaft(6) is fitted in the top bearing housing and lower end of the lower bearing housing is fitted in the bottom bearing housing, each curved wings (4) are separately riveted from the first end (27) to the top circular plate(5) and second end (28) of covered wing (4) is also separately rived to the bottom circular plate (6) and the outer end of upper metallic supports (14,15,16 & 17) is rived to the circular strip (29) and inner end of upper metallic supports (14,15,16 & 17) is rived to the upper washer(12) and lower washer(13).Nick (21) separates upper throat (12) and lower throat (13). Inner end of the lower metallic supports (18, 19 & 20) is connected to the nylon housing (22) by means of riveting and outer end of the lower metallic supports (18, 19 & 20) is connected to the upper throat (2) by riveting. 8 2. A ROOF VENTILATOR as claimed in claim 1 wherein top circular plate (5), upper washer (12) and lower washer (13) have the central hole. 3. A ROOF VENTILATOR as claimed in claim 1 wherein main shaft (6) has threads to connect the dome assembly (1) by means of bolt (30). 4. A ROOF VENTILATOR as claimed in claim 1 wherein main shaft (6) passes through the top circular disc (5), upper & lower washer (12 & 13) & main shaft (6) is fitted with two ball bearing in a nylon housing (26). 5. A ROOF VENTILATOR as claimed in claim 4 wherein dome(l) is connected on the upper end of the main shaft (6) by means of bolt in such a way that curved wings (4) spaced about said main shaft (5) & dome (1) rotate about the central axis of the said main shaft(5). 6. A ROOF VENTILATOR as claimed in claiml wherein upper throat(2) is mounted on lower throat(3) in such a way that upper throat (2) and lower throat(3) can rotate on each other depending on the slop of the roof and combination of upper throat & lower throat is balanced by the lower metallic supports(18,19,20). 9 7. A roof ventilator as claimed in claim 1 wherein D.C. drive motor is connected at lower end of main shaft through gears. 8. A roof ventilator as claimed in claim and„7 wherein solar module is connected with the D.C. drive motor. 9. A roof ventilator substantially herein described with reference to the foregoing description and the accompanying drawings, Dated this on 3rd January, 2003 10

Full Text

FORM - 2
THE PATENTS ACT, 1970
COMPLETE SPECIFICATION
[Section 10]
1. A ROOF VENTILATOR
2. (A) JASHWANTLAL NARANDAS SHAH
(B) 2023/PH-lll, G.l.D.C, Vatva, Ahmedabad-382 445 Gujarat, India.
(C) Nationality an Indian.
The following specification particularly describes the nature of the invention and the manner in which it is to be performed.

This invention relates to A roof ventilator.
Factories, Warehouses, workshops, houses & even kitchens are frequently constructed without efficient natural ventilation system. Providing of doors and windows is not adequate since stale hot air does not disperse by itself. There are some conventional power consuming ventilation system available in the market such as exhaust fans, chimney for which electricity is required. Also Conventional Ventilators, which are based on the natural wind energy having a drawback of not functioning when wind stops and fails in providing the advantages of it.
To overcome the above problem, A Roof ventilator is prepared incorporating solar & wind energy which increases its functionality in such a way that it works even in low or almost no wind. A Roof ventilator is characterized by a mechanical device operates through natural wind and/or solar energy. When fitted over the roof the lightest flow of wind rotates the dome of ventilator & the product
2

starts functioning and exhausts all the stale & polluted air inside the house or shed. As only natural energy is being used for-a device, there is no requirement of electricity and hence it becomes a maintenance free unit. This device has many advantages such as positive extraction of polluted air, improves productivity by reducing human stress, improves indoor air quality, reduces structural damages, human and environmentally friendly and works on natural energy such as wind and/or solar and hence no requirement of electricity. Therefore it is economical too. The present invention is described with greater specific and clarity
with reference to the following drawings.
Fig. 1 represents cross sectional view of Dome.
Fig. 2 represents circular disc.
Fig. 3 represents circular strip.
Fig. 4 represents bottom section with main shaft.

3
Fig. 5 represents cross sectional view of Solar & natural
Powered turbine roof ventilator. Fig. 6 represents roof Ventilator when it is connected with solar module.
Dome 1 is made up of Aluminum/Galvanize/Polycarbonate curved wings 4. A roof ventilator is divided into top section 25 and bottom section 26. Top section 25 consists of Dome 1 and bottom section 26 consists of upper throat 2 & lower throat 3. Nick 21 separates bottom section 26 into upper throat 2 & lower throat 3. Each of the curved wings 4 has a first end 27, which is securely riveted to the top circular plate 5 and further has a second end 28, which is securely riveted to the circular strip 29.Dome 1 is balanced by connecting four no. of upper metallic supports 14,15,16 & 17. Outer end of upper metallic supports 14,15,16 &17 is riveted to the circular strip 29 and inner end of the upper metallic supports 14, 15,16 & 17 is riveted to the upper washer 12 & lower washer 13. Circular disc 5 has central hole 7 and
4

similarly both upper washer 12 and lower washer 13 have the central hole.
Bottom section 26 is made up of combination of upper throat 2 and lower throat 3 for the purpose of changing the alignment depending on the slope of the roof. Bottom section 26 is balanced by connecting three no. of lower metallic supports 18,19 & 20. Inner end of the lower metallic supports 18,19 & 20 is connected to the nylon housing 22 by means of riveting and outer end of lower metallic supports 18,19 & 20 is connected to the upper throat 2 by riveting. Main shaft 6 passes through the circular disc 5, upper washer 12, lower washer 13 and nylon housing 22. Upper end of the main shaft 6 has threads to connect the Dome assembly 1 by means of bolt 30. Considering the bottom section 26 of roof ventilator, the main shaft 6 is fitted with two ball bearings in a nylon housing 26. Nylon and Teflon bush pass through the main shaft 6 and lying on the nylon housing 22. Gear 23 is connected to the lower end of main shaft 6 and the same is rotated by gear 11 of D.C. drive motor 8. Solar module 10 is
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connected to the D.C. Motor 8 at point 24 via cable 9. In the presence of sunlight, as D.C. Motor 8 is connected with the solar module 10, energy developed by solar module 10 being transferred to D.C. Motor 8 which allows Dome 1 to spin via main shaft 6 [Fig.6]. A roof ventilator spins though wind and/or solar energy. A roof ventilator operated by utilizing the velocity energy of wind to induce airflow by centrifugal action. The centrifugal force caused by the curved wings 4 of dome creates a region of low-pressure area, which draws air out through this device. Air drawn out by this device continuously replaces fresh air from the outside. Once the hot air is removed from the building, a new cooler air will enter. Also as D.C. drive motor is connected with the main shaft through gears and hence r.p.m. can be maintained even during no wind or
9
low wind by utilizing energy generated from the solar module.
6

I claim:
1. A ROOF VENTILATOR consists top circular ring(5), bottom circular strip (29), curved wings (4), adjustable throat, main shaft(6), upper metallic supports (14,15,16&17) lower metallic supports (18,19,20) wherein
(a) top circular ring (5) and bottom circular strip (29) are connected by main shaft;
(b) upper end of main shaft is fitted in the top bearing housing and lower end of the lower bearing housing is fitted in the bottom bearing housing;
(c) each curved wings (4) are separately riveted from the first end (27) to the top circular plate(5) and second end (28) of covered wing (4) is also separately rived to the bottom circular strip (29);
(d)outer end of upper metallic supports (14,15,16 & 17) is rived to the circular strip (29) and inner end of upper metallic supports (14,15,16 & 17) is rived to the upper washer(12) and lower washer(13);
(e) nick (21) separates upper throat (12) and lower throat (13);
(f) inner end of the lower metallic supports (18, 19 & 20) is connected to the nylon housing (22) by means of riveting and outer end of the lower metallic supports (18,19 & 20) is connected to the upper throat (2) by riveting.
7

Statement of Invention:
A ROOF VENTILATOR consists top circular ring (5), bottom circular strip (29), curved wings (4), upper throat (2), lower throat (3), main shaft (6), upper metallic supports (14, 15, 16 & 17), lower metallic supports (18, 19 & 20) wherein top circular ring (5) and bottom circular strip (29)are connected by main shaft(6) where the upper end of main shaft(6) is fitted in the top bearing housing and lower end of the lower bearing housing is fitted in the bottom bearing housing, each curved wings (4) are separately riveted from the first end (27) to the top circular plate(5) and second end (28) of covered wing (4) is also separately rived to the bottom circular plate (6) and the outer end of upper metallic supports (14,15,16 & 17) is rived to the circular strip (29) and inner end of upper metallic supports (14,15,16 & 17) is rived to the upper washer(12) and lower washer(13).Nick (21) separates upper throat (12) and lower throat (13). Inner end of the lower metallic supports (18, 19 & 20) is connected to the nylon housing (22) by means of riveting and outer end of the lower metallic supports (18, 19 & 20) is connected to the upper throat (2) by riveting.
8

2. A ROOF VENTILATOR as claimed in claim 1 wherein top circular plate (5), upper washer (12) and lower washer (13) have the central hole.
3. A ROOF VENTILATOR as claimed in claim 1 wherein main shaft (6) has threads to connect the dome assembly (1) by means of bolt (30).
4. A ROOF VENTILATOR as claimed in claim 1 wherein main shaft (6) passes through the top circular disc (5), upper & lower washer (12 & 13) & main shaft (6) is fitted with two ball bearing in a nylon housing (26).
5. A ROOF VENTILATOR as claimed in claim 4 wherein dome(l) is connected on the upper end of the main shaft (6) by means of bolt in such a way that curved wings (4) spaced about said main shaft (5) & dome (1) rotate about the central axis of the said main shaft(5).
6. A ROOF VENTILATOR as claimed in claiml wherein upper throat(2) is mounted on lower throat(3) in such a way that upper throat (2) and lower throat(3) can rotate on each other depending on the slop of the roof and combination of upper throat & lower throat is balanced by the lower metallic supports(18,19,20).
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7. A roof ventilator as claimed in claim 1 wherein D.C. drive motor is connected at lower end of main shaft through gears.
8. A roof ventilator as claimed in claim and„7 wherein solar module is connected with the D.C. drive motor.
9. A roof ventilator substantially herein described with reference to the foregoing description and the accompanying drawings,
Dated this on 3rd January, 2003

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A ROOF VENTILATOR

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