发明名称 |
Insulation cap for disappearing stairwells |
摘要 |
A rigid block of insulative material, such as expanded polystyrene or having an R value of 19 is mounted above the opening in the ceiling in which a disappearing staircase is mounted. The block is so mounted as to be movable entirely or so that a portion thereof is movable between a first normally closed position to a second open position providing access through the ceiling opening.
|
申请公布号 |
US4344505(A) |
申请公布日期 |
1982.08.17 |
申请号 |
US19800177990 |
申请日期 |
1980.08.14 |
申请人 |
WATERS, E. EUGENE;HARRELL, GORDON E. |
发明人 |
WATERS, E. EUGENE;HARRELL, GORDON E. |
分类号 |
E04F11/06;(IPC1-7):E06C9/06 |
主分类号 |
E04F11/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|