Extendable sleeve for poured concrete deck
US9103116B2 · kind B2 · utility
22Cited by
32References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2014 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Feb 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02G3/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tubular passage for poured concrete decks has an intumescent tube held in a two-part, clamshell base. First and second, spaced apart, funnel shaped, diaphragm seals are connected to a first tubular passage or an adjustable length tubular extension. A cap for closing either tube has an inclined outer surface to form a beveled entrance to the passage in the concrete. An aerator box may be connected to the base. Hinged ends on the base allow the shape and length of support to be altered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.