Roof jack — Blair, Earl

Roof jack - Blair, Earl

This is a continuation of copending applications Ser. No. 07/374,286 filed on 06/30/89 now abandoned.

Claims:

What is claimed is:

1. A rooj jack or vent seal for use on a generally planar pitched roof having a vent or structure extending upward through the roof and requiring a weather seal comprising:

a flexible vacuum formed unitary plastic member of polymeric-synthetic rubber material including a generally planar portion;

said generally planar portion surrounding an upstanding portion;

said upstanding portion including a plurality of coaxial substantially parallel stepped reduced diameter tubular portions, each including an upstanding portion of substantial length having an internal dimension generally cooresponding to the outside dimensions of a structure to be used with said roof jack; and

said flexible plastic member including a transition portion between said base portion and at least one of said tubular portions;

said transition portion including at least one corrugation which will flex to allow the generally planar portion to conform to the plane of the roof to which the roof jack is secured permitting the tubular portion to extend generally parallel to the length of a structure extending therethrough;

said flexible plastic member being severable at the tubular portion corresponding to the outside dimension of the vent.

2. A roof jack or vent seal in accordance with claim 1 wherein said upstanding portion of said plastic member is of generally frusto-conical shape.

3. A roof jack or vent seal in accordance with claim 1 wherein said flexible plastic member is formed in its finished shape by vacuum forming from a planar sheet of plastic material.

4. A roof jack or vent seal in accordance with claim 2 wherein said upstanding portion in included in the range of 0 to 20 degrees with respect to said planar portion.

5. A roof jack or vent seal in accordance with claim 1 wherein said base section is truncated to provide flat sides on opposite sides thereof.

6. A roof jack or vent seal in accordance with claim 1 wherein said transition portion includes at least two corrugations capable of at least 10 degrees of flexing to accomodate variations in roof pitch without significant distortion of said stepped reduced diameter tubular portions.

7. A roof jack or vent seal in accordance with claim 1 wherein said stepped portions are at least two in number.

8. A roof jack or seal for use on a contoured pitched roof such as a tile roof having a vent or structure extending upward through the roof and requiring a weather seal comprising:

a flexible vacuum formed unitary plastic member including a transversely extending sheet-like portion surrounding an upstanding portion;

said transversely extending portion including a plurality of longitudinally extending corrugations providing a preferred direction of bending above or below the upstanding portion;

a deformable length of metal secured to said flexible plastic member for retaining said transversely extending portion in a preselected position by bending of said length of metal;

said upstanding portion including an upstanding length having an internal dimension corresponding to the outside dimensions of a structure to be used with said roof jack or vent seal;

said flexible plastic member including a transition portion between said upstanding portion and said upstanding length;

said transition portion including at least one corrugation which will flex to allow the generally planar portion to conform to the plane of the roof to which the roof jack or vent seal is secured while the upstanding length may extend generally parallel to the length of a structure extending through said roof.

9. A roof jack or seal in accordance with claim 8 wherein said transversely extending portion includes a plurality of longitudinally extending corrugations providing preferred direction of bending in the transverse direction.

Roof jack - Blair, Earl

10. A roof jack or seal in accordance with claim 8 wherein said flexible plastic member is unitary.

11. A roof jack or vent seal in accordance with claim 9 including deformable means secured to said flexible member for retaining said transverse extending portion in a preselected configuration by bending of said deformable means.

12. A roof jack or vent seal in accordance with claim 8 wherein said length of metal wire is at least partially enclosed by said flexible member.

13. A roof jack or vent seal in accordance with claim 8 wherein said length of metal wire extends in a transverse direction generally at the lower or front edge of said roof jack or vent seal when installed on a roof.

14. A roof jack or seal in accordance with claim 8 wherein said deformable length of metal comprises a length of wire.

15. A roof jack or seal for use on a contoured pitched roof such as a tile roof having a vent or structure extending upward through the roof and requiring a weather seal comprising:

a flexible vacuum formed unitary plastic member including a transversely extending sheet-like portion surrounding an upstanding portion;

said transversely extending portion including a plurality of longitudinally extending corrugations providing a preferred direction of bending above or below the upstanding portion;

a length of deformable metal wire secured to said flexible member for retaining said transverse extending portion in a preselected configuration by bending said wire;

said upstanding portion including an upstanding length having an internal dimension corresponding to the outside dimensions of a structure to be used with said roof jack or vent seal;

said flexible plastic member including a transition portion between said upstanding portion and said upstanding length;

said transition portion including at least one corrugation which will flex to allow the generally planar portion to conform to the plane of the roof to which the roof jack or vent seal is secured while the upstanding length may extend generally parallel to the length of a structure extending through said roof.


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