Opening-and-closing apparatus
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United States of America Patent
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app pub date -
Jun 17, 2015
filing date -
Aug 1, 2014
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Abstract
An opening-and-closing body is configured to open and close an opening and to move in a closing direction across a first section of movement in which the opening-and-closing body moves against the weight of the opening-and-closing body and a second section of movement in which the weight of the opening-and-closing body assists the movement of the opening-and-closing body in the closing direction. A driver is configured to drive the opening-and-closing body in the closing direction. A predictor is configured to predict when the opening-and-closing body will shift from the first section of movement to the second section of movement as the driver drives the opening-and-closing body in the closing direction.
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