| 摘要 |
<p>A door assembly comprising a door body having a bottom edge is disclosed. Th e door body is selectively movable up and down to open and close an opening. T he door assembly further comprises a safety edge attached to the bottom edge of the door body, the safety edge being an extrudate extruded from a deformable material and comprising a first and second chamber formed in integrated cooperative redundancy in the extrudate, wherein the first chamber comprises a first sensor body and the second chamber comprises a second sensor body, eac h sensor being responsive to an impact.</p> |
