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:
Nov. 24, 1987
Filed:
Sep. 15, 1986
John D Nicholas, Lawrenceville, GA (US);
Larry M Petree, Lawrenceville, GA (US);
Julian J Attaway, Marietta, GA (US);
MM Systems Corporation, Tucker, GA (US);
Abstract
A device for sealing the joint between adjacent structural members such as concrete slabs in bridges, parking decks, and the like, and for absorbing thermal expansion and contraction of the adjacent structural members. The compression seal employs a cross-sectional configuration comprising a square center cell within a square outer seal structure to provide an advantageous movement rating while minimizing vertical elongation of the seal during compression. As lateral compressive forces are exerted on the vertical sides of the outer square by thermal expansion of the adjacent structural members, the seal collapses in a controlled manner, the square center cell redirecting lateral compressive forces to support the upper and lower seal walls. Thus, the upper wall of the seal provides a substantially planar pedestrian treadway even as the seal is compressed.