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:
May. 18, 1982
Filed:
Nov. 05, 1979
Applicant:
Inventors:
Bernhard Borgert, Mannheim, DE;
Udo Liche, Mannheim, DE;
Assignee:
Braas & Co. GmbH, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; E04C / ;
U.S. Cl.
CPC ...
428 64 ; 52 58 ; 52 96 ; 428174 ;
Abstract
A sealing element is provided which is suitable for sealing flat roofs and engineering structures. The sealing element is made of a water-resistant elastomer or plastomer, and comprises a lamelliform structure of substantially circular shape having from four to six waves, inclusively, distributed radially throughout the structure and around the entire circumference of the structure, the amplitudes of which waves increase regularly from the center of the structure towards the circumference. The undulations enable the sealing element to have an effective surface covering more than 360.degree. without straining any region of the element.