Vent extension flashing assembly
US5778611A · kind A · utility
Inventor
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23J13/00
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A vent extension flashing assembly having a tubular outside vent stack cover which is secured to a substantially flat roof flashing base plate. The tubular outside vent cover has a diameter larger than the vent pipe to be covered by the vent extension flashing assembly. The assembly includes a tubular inner vent stack cover positioned within the tubular outer vent cover, wherein the tubular inner vent cover includes a diameter smaller than that of the covered vent pipe so as to fit within the covered vent pipe. When the assembly is positioned over the vent pipe, the vent pipe extends between the tubular outer vent cover and the tubular inner vent cover. A rigid expandable portion is formed on the innermost end of the inner vent cover and is capable of being expanded by a cam member to engage an inner surface of the vent pipe to hold the inner vent cover in place within the vent pipe. A tamperproof cap covers the outer end of the assembly extending around the outer surface of the tubular outer vent cover, and the cap is held in place by a plurality of pressure set screws.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.