Roof vent

• US 7,774,999 B2
• Filed: 02/13/2007
• Issued: 08/17/2010
• Est. Priority Date: 02/13/2006
• Status: Active Grant

• Current Assignee: Canplas Industries Limited (Aliaxis SA)
• Original Assignee: Canplas Industries Limited (Aliaxis SA)
• Inventors: McKee, James H. A.
• Primary Examiner(s): Glessner; Brian E
• Application Number:
  US11/705,619
• Publication Number:
  US 20070204532A1
• Time in Patent Office: 1,281 Days
• Field of Search: 521/98, 521/99, 522/00, 52/72, 52/95, 522/18, 522/19, 454/366, 454/367, 454/368
• US Class Current: 52/199
• CPC Class Codes: F24F 7/02 Roof ventilation ventilation of roof coverings E04D
• CPC Class Codes: Y10T 29/49947 by applying separate fastener

Abstract

A roof vent is provide. The roof vent comprises a top component coupled to a bottom component. The top component has a top wall, a side wall, a first louvered region disposed between said top wall and said side wall, and a top cylindrical baffle located inwardly of said first louvered region. The bottom component has at least a first cylindrical collar sized and shaped for mounting to a cylindrical exhaust stack of a first diameter, a second louvered region, and a bottom cylindrical baffle located below and inwardly of the top cylindrical baffle. The first louvered and second louvered regions are for helping to prevent insects, and moisture, such as snow and rain, from entering the roof vent. The top component may also be used separately from the bottom component to cover over aging or aesthetically unpleasing passive pot vents.

Claims

1. A passive roof vent comprising:

a top component having a top wall, a side wall, a first louvered region disposed between said top wall and said side wall, and a top cylindrical baffle attached to said top wall inwardly of said first louvered region; and

a bottom component coupled to said top component, said bottom component having at least a first cylindrical collar sized and shaped for mounting to a cylindrical exhaust stack of a first diameter, a second louvered region, a bottom cylindrical baffle attached to said bottom component inwardly of said second louvered region and being sized and positioned relative to said top baffle to pass water entering said vent through said first louvered region out of said vent through said second louvered region and to permit air to pass between said top cylindrical baffle and said bottom cylindrical baffle through said vent.

2. A roof vent as claimed in claim 1, wherein said top component and said bottom component are coupled by a friction fit coupling.

3. A roof vent as claimed in claim 2, wherein said top component has a lower edge, and said bottom component has a complementary lip, and said friction fit coupling is effected by engaging said lower edge with said complementary lip.

4. A roof vent as claimed in claim 1, further comprising a second cylindrical collar sized and shaped for mounting to a cylindrical exhaust stack of a second diameter.

5. A roof vent as claimed in claim 1, wherein said first louvered region and said second louvered region are positioned outwardly from said exhaust stack.

6. A roof vent as claimed in claim 5, wherein said outward positioning of said louvered regions increases a net free air flow area from a twelve inch diameter exhaust stack in excess of 120 inches.

7. A roof vent as claimed in claim 1, wherein said first louvered region and said second louvered region, in combination with said top cylindrical baffle and said second cylindrical baffle create a tortuous path to help inhibit moisture, such as snow and rain from entering said exhaust stack while allowing exhaust air to pass through to outside of said roof vent.

8. A roof vent as claimed in claim 1, wherein said bottom component further comprises a channel abutting a base of said bottom cylindrical baffle, said channel being for directing water out of said roof vent.

9. A roof vent as claimed in claim 1, wherein said top component further comprises a plurality of tabs joined to a lower edge of said side wall.

10. A roof vent as claimed in claim 9, wherein said tabs can be used to secure said coupling of said top component to said bottom component.

11. A roof vent as claimed in claim 1, further comprising a skirt attached to said top baffle, said skirt expanding outwardly from said top baffle, said skirt being for helping to direct moisture, such as snow and rain, entering from said roof vent through said first louvered region, away from said exhaust stack.

12. A roof vent as claimed in claim 1, wherein said top component may be used separately to cover over an existing passive pot vent.

13. A roof vent as claimed in claim 12, wherein said top component further comprises a plurality of water drains disposed along a lower edge of said side wall.

14. A roof vent as claimed in claim 12, wherein said top component further comprises a plurality of tabs joined to said lower edge of said side wall.

15. A roof vent as claimed in claim 14, wherein said tabs can be used to secure said coupling of said top component to a roof.

21. A roof vent as claimed in claim 5, wherein said outward positioning of said louvered regions increases a net free air flow area from a fourteen inch diameter exhaust stack in excess of 120 inches.

24. The roof vent system according to claim 1, wherein said first louvered region is a plurality of air ventilation openings.

25. The roof vent system according to claim 24, wherein said first louvered region includes ribs, said ribs support said plurality of air ventilation openings.

26. A roof vent as claimed in claim 1, wherein said top cylindrical baffle has a larger diameter than said second cylindrical baffle, said first louvered region and said second louvered region, in combination with said top cylindrical baffle and said second cylindrical baffle create a tortuous path to help inhibit moisture, such as snow and rain from entering said exhaust stack while allowing exhaust air to pass through to outside of said roof vent.

27. A roof vent as claimed in claim 1, further comprising a skirt attached to said top baffle by a friction fit coupling, said skirt expanding outwardly from said top baffle, said skirt being for helping to direct moisture, such as snow and rain, entering from said roof vent through said first louvered region, away from said exhaust stack.

28. A roof vent as claimed in claim 14, further including hinges, said hinges attach said tabs to said top component, wherein said tabs can be used to secure said coupling of said top component to a roof.

16. A passive roof vent system comprising:

a bottom component mounted to an exhaust stack, said bottom component comprising a lower outer surface with a plurality of air ventilation openings therein, a lower interior baffle attached to said lower surface inwardly of said plurality of air ventilation openings, and a bottom collar that receives said exhaust stack;

a top component sized and shaped to be mounted to said bottom component, said top component comprising an upper inner surface, an upper outer surface attached to and about said upper inner surface, and an upper interior baffle attached to said upper inner surface, wherein said upper and lower interior baffles cooperate with said plurality of air ventilation openings to provide weather and insect protection while allowing air exhaust.

17. A roof vent system according to claim 16, wherein said upper interior baffle surrounds at least a portion of said lower interior baffle and a spaced apart air gap exists between said upper interior baffle and said lower interior baffle with said top component mounted to said bottom component.

18. A roof vent system according to claim 17, wherein said upper interior baffle in combination with said lower interior baffle provide a tortuous air flow passageway.

19. A roof vent system according to claim 16, wherein said top component includes said upper outer surface with another plurality of air ventilation openings and said upper interior baffle is located inwardly of said another plurality of air ventilation openings.

29. A roof vent system according to claim 17, wherein said upper interior baffle has a larger diameter than said lower interior baffle, and said upper interior baffle in combination with said lower interior baffle provide a tortuous air flow passageway.

20. A passive roof vent installation provided by the installation steps comprising:

mounting a bottom component to an exhaust stack, said bottom component comprising a lower outer surface with a first plurality of air ventilation openings, a lower interior baffle attached to said bottom component inwardly of said first plurality of air ventilation openings therein to prevent water from passing through said first plurality of air ventilation openings into said vent, and a bottom collar receiving said exhaust stack;

mounting a top component onto said bottom component, said top component comprising an upper inner surface, an upper outer surface attached to and about said upper inner surface, said upper outer surface having a second plurality of air ventilation openings therein, and an upper interior baffle attached to said upper inner surface to prevent water from passing through said second plurality of air ventilation openings into said vent, wherein said upper and lower interior baffles cooperate with said first and second ventilation openings to provide weather and insect protection while allowing air exhaust.

22. A passive roof vent system comprising:

a bottom component mounted to an exhaust stack, said bottom component comprising a lower outer surface with a plurality of air ventilation openings therein, a lower interior baffle attached to said bottom component inwardly of said lower outer surface, and a bottom collar that receives said exhaust stack;

a top component sized and shaped to be mounted to said bottom component, said top component comprising an upper inner surface, an upper outer surface attached to and about said upper inner surface, said upper outer surface having a plurality of air ventilation openings therein, and an upper interior baffle attached to said upper inner surface, wherein said upper and lower interior baffles cooperate with said ventilation openings to provide weather and insect protection while allowing air exhaust.

23. The passive roof vent system of claim 22 wherein said bottom collar includes a top opening and a bottom opening and a tapered portion therebetween, said top opening is smaller in diameter than said bottom opening.