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:
Oct. 01, 1996
Filed:
Mar. 22, 1994
Zoltan A Kemeny, Tempe, AZ (US);
Tekton, Tempe, AZ (US);
Abstract
A seismic brake assembly comprises an annular pipe journaled through a gripping block which frictionally engages the pipe about the pipe's outer diameter. The force with which the gripping block frictionally engages the pipe is controlled by a Belleville or spring-loaded washer. By securing the gripping block to one point in a structure and by securing one end of the pipe to another point in or associated with the same building or structure to be supported, the seismic brake functions as a rigid member of applied lateral stresses less than a design threshold. When the applied lateral force exceeds the design threshold, controlled sliding friction between the rod and gripping block is experienced, whereupon the building or structural framing returns the seismic brake to its nominal position when the seismic activity ceases. By controlling various factors including the diameter of the pipe and the tension with which the block engages the pipe, virtually any desired hysteresis loop may be achieved.