Bollards
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United States of America Patent
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Sep 15, 2015
Grant Date -
Jun 12, 2014
app pub date -
May 25, 2012
filing date -
May 27, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A bollard apparatus comprising an outer bollard member (3) comprising a bore, an inner bollard member (5) at least a part of which is located within said bore and is moveable along the bore from a retracted state in which at least some of the inner bollard member is located within the bore to an extended state in which less of the inner bollard member is located within the bore. At least one urging member (19) is arranged to exert an urging force upon the inner bollard member to urge the inner bollard member towards the extended state. A lifting apparatus (12) is coupled to the inner bollard member and operable to exert a lifting force thereupon sufficient to lift the inner bollard to the extended state when also subject to the urging force.
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