Hatchway door for elevator system
US4735293A · kind A · utility
24Cited by
12References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1986 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Dec 1, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/303
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A hatchway door for an elevator system which includes a smoke seal. The smoke seal includes a compression seal along the trailing edge of each door panel which engages as the panel reaches the fully closed position, an astragal seal along the leading edge which engages another panel or a return, and sealing arrangements associated with the top and bottom portions of each door panel which seal the associated gaps with a spring loaded cam action which translates horizontal movement of the door panel to vertical movement of each sealing arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.