The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 2013
Filed:
Nov. 18, 2010
Jeremias C. Rivera, Jr., Elmhurst, IL (US);
Doss Samikkannu, Des Plaines, IL (US);
Gregory Hanusiak, Chicago, IL (US);
Zelio Ferrarini, Oswego, IL (US);
Jeremias C. Rivera, Jr., Elmhurst, IL (US);
Doss Samikkannu, Des Plaines, IL (US);
Gregory Hanusiak, Chicago, IL (US);
Zelio Ferrarini, Oswego, IL (US);
Amtab Manufacturing Corporation, Aurora, IL (US);
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.