| 摘要 |
PCT No. PCT/US96/17811 Sec. 371 Date Jul. 2, 1998 Sec. 102(e) Date Jul. 2, 1998 PCT Filed Nov. 7, 1996 PCT Pub. No. WO98/20224 PCT Pub. Date May 14, 1998An overhead door system including, a sectional door (D'') having top, bottom, and intermediate panels (321, 324, 322) hinged for moving between a closed vertical position and an open horizontal position, top rollers (332) on the top panel, bottom rollers (341) on the bottom panel, intermediate rollers (337) positioned between the top rollers and the bottom rollers, inner vertical tracks (351) for engaging the intermediate rollers, transition tracks (353) connected to the inner vertical tracks and curving through an angle of approximately ninety degrees for directing the travel of the intermediate rollers, horizontal tracks (355) extending from the transition tracks for engaging the intermediate rollers to support the door in the open horizontal position, and outer vertical tracks (357) for guiding the bottom rollers in a substantially vertical path paralleling said inner vertical tracks and having upper extremities (357') that are inwardly offset in the direction of the transition tracks.
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