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:
Jul. 08, 1986
Filed:
Sep. 06, 1984
Richard Shirey, Avon, OH (US);
Donn Incorporated, Westlake, OH (US);
Abstract
A fire-rated type suspension ceiling grid runner is disclosed having expansion means intermediate its ends which collapse when the runner expands due to elevated temperatures occurring during a fire or the like. The runner provides a boxlike panel supporting flange along the lower end of the web thereof in which slots are formed to define a flange segment and connecting legs. When the expansion means collapses, the flange segment is laterally displaced as a unit and remains connected to each adjacent portion of the boxlike flange by at least two longitudinally spaced legs. The displaced flange segment functions as a bridging beam which continues to connect the adjacent portions of the flange and maintain them in alignment so that a grid formed of the runners can continue to maintain proper support for panel even when fire conditions occur.