Automatic sash return for work chamber
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United States of America Patent
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-
Nov 9, 2004
Grant Date -
N/A
app pub date -
Jul 11, 2003
filing date -
Jul 11, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A counterweight apparatus is provided for automatically self-returning an enclosure sash or other closure member to at least one preselected intermediate position when released after being opened beyond that intermediate position and for selectively maintaining the closure member in at-rest positions, when released, between that intermediate position and a fully closed position.
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