| 摘要 |
An inflatable dock seal includes inflatable top and side seal sections which are adapted to be secured to a building wall adjacent the top and side extremities of a loading dock opening therein, an inflating mechanism for inflating the top and side seal sections and a retracting mechanism for retracting the top and side seal sections when the inflating mechanism is deactuated. In one embodiment of the dock seal the retracting mechanism includes constant force springs for retracting the top and side seal sections thereof and in a second embodiment the retracting mechanism includes a constant force spring for retracting the top seal section thereof and a pair of resiliently expandable cord elements for retracting the side seal sections thereof. In both embodiments of the dock seal the side seal sections are preferably adapted to extend angularly outwardly from the respective building walls on which they are mounted and inwardly toward the respective loading dock openings thereof so that they are more effective for yieldably engaging the side surfaces of truck bodies stationed at the respective loading dock openings thereof.
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