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A flashing including an elastomeric collar with an inner surface and an outer surface and adapted to seal against more than one size of a vent pipe passing vertically through a central opening in the collar. The elastomeric collar has a circular base adapted for interconnection with a base member an

A flashing including an elastomeric collar with an inner surface and an outer surface and adapted to seal against more than one size of a vent pipe passing vertically through a central opening in the collar. The elastomeric collar has a circular base adapted for interconnection with a base member and a central opening including a first annular ring defined by a separation circle and a second separation circle, at least one additional annular ring outwardly therefrom that is frangibly separable from the first annular ring at the second separation circle and frangibly separable from the elastomeric collar at a third separation circle. Each annular ring selectively is removable by a pull tab that extends vertically from the outer surface of each annular ring at a location proximate to the separation circle of that ring with respect to the elastomeric collar.

대표청구항 ▼

1. In a flashing comprising an elastomeric collar with an inner surface and an outer surface and adapted to seal against more than one size of a vent pipe passing vertically through a central opening in said collar and a base member having a flange to be mounted upon a roof surface, the improvement

1. In a flashing comprising an elastomeric collar with an inner surface and an outer surface and adapted to seal against more than one size of a vent pipe passing vertically through a central opening in said collar and a base member having a flange to be mounted upon a roof surface, the improvement in said elastomeric collar comprising a circular base adapted for interconnection with the base member and a central opening comprising, a first annular ring defined by a first separation circle and a second separation circle, at least one additional annular ring outwardly from the first annular ring, the at least one additional annular ring being frangibly separable from the first annular ring at said second separation circle and frangibly separable from said elastomeric collar at a third separation circle, said first, second, and third separation circles being concentrically arranged, in order, outwardly from the central opening, and each of said second and third separation circles including an arcuate primary frangible segment of reduced wall thickness to assist in the removal of each annular ring, wherein a pull tab extends substantially vertically from the outer surface of each annular ring at a location proximate to the outer separation circle of that ring and immediately above an associated arcuate primary frangible segment of a respective separation circle, for selective removal of each annular ring. 2. An improved flashing according to claim 1, wherein each of said second and third separation circles further include a secondary frangible section that extends from either end of said arcuate primary frangible segment, around a respective separation circle. 3. An improved flashing according to claim 1, wherein said first separation circle defines a first diameter that is adapted to be distended by the outer surface of a first vent pipe diameter to define a first primary seal, the inner surface of said first annular ring comprising a first secondary shoulder that defines a second diameter, larger than the first, adapted to be distended and define a first secondary seal upon said first vent pipe diameter. 4. An improved flashing according to claim 3, wherein said second separation circle defines a third diameter, larger than the second, that is adapted to be distended and define a second primary seal about the outer surface of a second vent pipe diameter larger than said first vent pipe diameter, the inner surface of a second annular ring comprising a second secondary shoulder adapted to be distended by the second vent pipe diameter and thereby define a second secondary seal. 5. An improved flashing according to claim 4, wherein said third separation circle defines a fourth diameter, larger than the third, that is adapted to be distended and define a third primary seal about the outer surface of a third vent pipe diameter, the inner surface of a third annular ring comprising a third secondary shoulder adapted to be distended by the third vent pipe diameter and thereby define a third secondary seal. 6. An improved flashing according to claim 4, wherein said first annular ring defines a second pull tab located adjacent to said second separation circle having the third diameter and a third pull tab is located adjacent to said third separation circle, wherein further said second and third pull tabs each have concave outer surfaces and concave inner surfaces and are disposed on opposite sides of a vertical plane bisecting said elastomeric collar. 7. An improved flashing according to claim 6, wherein the second pull tab and the third pull tab are spaced at an angle of approximately 15-20 degrees with respect to a vertical plane bisecting said flashing, and disposed so as to have their respective convex surfaces facing upwardly when said flashing is positioned upon a roof having an inclined pitch, in an intended use. 8. In a two-piece flashing comprising a frustoconical hard base member adapted to be secured to a roof, and an elastomeric collar with an inner surface and an outer surface connected to said hard base member, wherein the elastomeric collar is adapted to seal against the outer diameter of more than one vent pipe size passing vertically through a central opening in said elastomeric collar, the improvement of an elastomeric collar having a circular base mechanically interconnected upon the hard base member, a first diameter defining a first separation circle adapted to be distended to define a first primary seal against the outer diameter of a first diameter vent pipe, a first annular ring radially outward from the first diameter and having an outer diameter defined by a second separation circle, a second annular ring radially outward from the second separation circle having an outer diameter defined by a third separation circle, wherein a pull tab extends upwardly from an outer surface of said first annular ring and is proximate to said second separation circle, wherein another pull tab extends upwardly from an outer surface of said second annular ring and is proximate to said third separation circle, each of said pull tabs being located on opposite sides of a vertical plane bisecting said flashing and each of said second and third separation circles including an arcuate primary frangible segment of reduced wall thickness to assist in the removal of each annular ring, each of said pull tabs extending immediately above an associated arcuate primary frangible segment of a respective separation circle, for selective removal of each annular ring. 9. In a two-piece flashing according to claim 8, wherein said second separation circle further comprises a secondary frangible section, and said third separation circle further comprises a secondary frangible section, wherein said secondary frangible sections of each of said second and third separation circles extend from either end of a respective arcuate primary frangible segment, around a respective separation circle. 10. In a two-piece flashing according to claim 8, wherein said first annular ring comprises a first secondary shoulder having a diameter adapted to be distended to define a first secondary seal against the first vent pipe diameter, said second annular ring comprises a second secondary shoulder having a diameter adapted to be distended to define a second secondary seal against a second vent pipe diameter that is greater than the first vent pipe diameter, and said elastomeric collar further comprises a third secondary shoulder having a diameter adapted to define a secondary seal with respect to a third vent pipe diameter that is greater than the second vent pipe diameter. 11. In a two-piece flashing according to claim 8, wherein said elastomeric collar circular base is mechanically interconnected by an overmolding upon an upper flange of a hard base member, wherein further the elastomeric collar and the hard base member are of complementary plastic compositions. 12. In a two-piece flash unit according to claim 8, wherein said elastomeric collar circular base further comprises a solid tubular ring extending downwardly therefrom that is substantially circular in cross-section and is crimped within an upwardly open channel of a metal hard base member, wherein further a narrow flange section extends downwardly over an outer surface of said metal hard base and is interconnected to said solid tubular ring by a web. 13. In a two-piece flashing according to claim 8, wherein said first diameter (A) is defined by a first separation circle of a central disc that difines a gate for molding of said elastomeric collar in a symmetrical fashion about a vertical center line of said elastomeric collar, said central disc further comprising a first pull tab that extends upwardly from an outer surface of said disc and is proximate to said first separation circle, whereby removal of said central disc defines said first diameter (A). 14. In a two-piece flashing according to claim 8, wherein said elastomeric collar circular base further comprises at least one corrugation as part of the mechanical interconnection of the elastomeric collar to said hard base member thereby providing a degree of relative motion of said elastomeric collar upon said hard base member.