| 摘要 |
A release mechanism for protecting a sectional door under impact allows one or more door panels to breakaway from its guide track without damaging the door . The release mechanism includes a snap-in pin that can be selectively repositioned to provide various operating modes. Examples of operating modes include unidirectional release, bi-directional release, and a disabled mode. In some cases, the breakaway threshold is greater in one direction than another. In the disabled mode, the release mechanism is not meant to release . Some embodiments include a door locking mechanism that still allows the release mechanism to operate.
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