Attic hatchway insulating cover
US4658555A · kind A · utility
Inventor
Key dates
| Filing date | Jul 12, 1985 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Jul 12, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F11/062
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An insulating cover provides a easily removed thermal barrier over a hatchway used for access to an attic or other unheated area located above a heated living space. A cap, besides providing thermal insulation, provides an insulated dome or pocket space above the hatch, this space being used to manipulate a hatch cover or folding stairway. The seating surface of the insulating cap interlocks with a deck member on the attic floor sufficiently to hold it in place while allowing seepage of air during closing of the hatch cover or folding stairway. It is well known that such closing of a folding stairway of common design can cause an air movement or air rain into the stairwell opening. Only materials with high thermal "R" value are used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.