Mobile folding choral riser with high-speed cylinder lift-assist mechanism and partially independent back railing linkage
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United States of America Patent
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Jul 22, 2014
Grant Date -
Oct 3, 2013
app pub date -
Apr 3, 2013
filing date -
Nov 18, 2010
priority date (Note) -
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Abstract
The present invention provides a mobile folding choral riser having lift-assist and stability mechanisms. In particular, the choral riser includes a gas cylinder that provides a force tending to extend the cylinder to assist in folding the riser into a storage position, the cylinder providing substantially no force to resist rapid extension thereof. In addition, the choral riser preferably includes a back railing linkage that permits independent raising and lowering of a back railing member when the choral riser is in a use or partially folded position but constrains the back railing member to a raised position when the choral riser is in an at least substantially fully folded position.
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