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:
Dec. 25, 1990
Filed:
Feb. 13, 1990
Keremit H Wilson, Edina, MN (US);
Rollin D Botts, Bloomington, MN (US);
Sico Incorporated, Minneapolis, MN (US);
Abstract
A mobile folding choral riser includes a foldable frame having means for receiving a number of removable riser steps at progressively higher locations on the frame. Locking means are provided for releasably securing the steps to the framework. A guardrail is provided along the back of the riser, and the guardrail is pivotable to permit overlapping with the guardrails of other riser sections when a riser in forward configuration (widest step at the back) is placed adjacent a riser section in reverse configuration (narrowest step at the back). Interlocks are provided for securing adjacent riser sections together, regardless of whether individual sections are in forward or reverse configuration. The riser can be folded between transport and operational configurations with locking or holding mechanisms for each configuration.